Fundies. English
Segment disclosures
Company overviewMDU Resources Group Inc
Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.
Revenue · Reported segment facts
120 dimension combinations 785 retained observations 9 reported periods Partial retained history
Counts describe retained dimensioned rows only. Periods and members can change across reports, and this view does not infer missing values or expected segment totals.
Intersegment Elimination · Regulated Operation · Electric
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:RegulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | -96000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -188000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -64000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -93000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Regulated Operation · Natural Gas Distribution
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:RegulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | -104000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -209000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -49000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -105000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Regulated Operation · Pipelineand Midstream
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:RegulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | -3904000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -43033000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -8854000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -39129000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Unregulated Operation · Construction Services
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:UnregulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -336000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -249000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -336000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Unregulated Operation · Pipelineand Midstream
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:UnregulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | -27000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -263000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -201000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -236000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Unregulated Operation · Corporate And Other
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:UnregulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | -1432000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -4265000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -1416000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -2833000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Construction Services
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -336000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -249000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -336000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Intersegment Elimination · Electric
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | -124000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | -291000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | -167000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | -553000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | -138000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | -457000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | -140000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | -318000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | -178000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | -72000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | -12000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -71000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -48000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -60000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Intersegment Elimination · Natural Gas Distribution
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | -86000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | -175000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | -89000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | -345000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | -92000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | -278000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | -92000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | -187000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | -94000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | -130000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | -31000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -108000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -35000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -76000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Intersegment Elimination · Pipelineand Midstream
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | -34460000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | -74992000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | -4269000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | -47401000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | -9796000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | -43132000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | -33337000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | -69222000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | -3924000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -43249000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -9035000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -39325000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Intersegment Elimination · Pipeline
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | -10052000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | -44512000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | -34460000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | -9796000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | -43132000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | -33337000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Intersegment Elimination · Corporate And Other
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | -201000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | -400000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | -199000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | -722000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | -182000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | -540000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | -180000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | -358000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | -178000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | -195000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | -21000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | -64000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | -20000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | -42000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Commercial Utility Sales · Electric
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 49184000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 187097000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 52492000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 144397000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 43428000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 91905000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 48477000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 171760000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 46648000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 129783000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 41620000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 83135000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Commercial Utility Sales · Natural Gas Distribution
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 157368000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 436431000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 45581000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 303611000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 65699000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 258030000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 192331000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 399087000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 37687000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 264091000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 64274000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 226404000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Commercial Utility Sales · Pipelineand Midstream
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Commercial Utility Sales · Pipeline
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Commercial Utility Sales · Corporate And Other
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Industrial Utility Sales · Electric
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 10010000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 38066000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 9525000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 27936000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 9247000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 18411000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 9164000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 42883000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 9702000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 32809000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 11758000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 23107000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Industrial Utility Sales · Natural Gas Distribution
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 12412000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 44183000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 7873000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 32433000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 9098000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 24560000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 15462000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 42588000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 6869000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 30716000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 9268000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 23847000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Industrial Utility Sales · Pipelineand Midstream
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Industrial Utility Sales · Pipeline
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Industrial Utility Sales · Corporate And Other
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Utility Sales · Electric
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 1960000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 7537000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1949000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 5592000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1793000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 3643000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1850000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 7910000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2045000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 6046000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2065000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 4001000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Utility Sales · Natural Gas Distribution
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Utility Sales · Pipelineand Midstream
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Utility Sales · Pipeline
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Other Utility Sales · Corporate And Other
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Residential Utility Sales · Electric
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 39401000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 137673000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 35730000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 103984000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 28569000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 68254000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 39685000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 140054000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 37076000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 107735000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 31437000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 70659000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Residential Utility Sales · Natural Gas Distribution
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 246326000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 654793000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 64225000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 453501000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 100041000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 389276000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 289235000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 646049000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 61928000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 431721000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 106690000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 369793000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Residential Utility Sales · Pipelineand Midstream
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Residential Utility Sales · Pipeline
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Residential Utility Sales · Corporate And Other
Consolidation Items · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Inside Specialty Contracting · Construction Services
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:InsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 534613000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1476006000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 502015000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 941393000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Inside Specialty Contracting · Electric
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:InsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Inside Specialty Contracting · Natural Gas Distribution
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:InsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Inside Specialty Contracting · Pipelineand Midstream
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:InsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Inside Specialty Contracting · Corporate And Other
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:InsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Natural Gas Transportation · Construction Services
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Natural Gas Transportation · Electric
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Transportation · Natural Gas Distribution
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 17506000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 66978000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 16292000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 49816000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 15814000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 33524000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 17710000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 60645000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 15279000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 43194000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 13324000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 27915000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Transportation · Pipelineand Midstream
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 191542000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 47239000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 142612000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 46120000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 95373000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 49253000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 174623000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 41936000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 128979000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 43406000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 87043000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Transportation · Pipeline
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 49077000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 49253000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Natural Gas Transportation · Corporate And Other
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Revenues · Construction Services
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 169000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 260000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 45000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 91000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Other Revenues · Electric
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 22264000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 74159000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 19118000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 53832000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 17123000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 34714000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 17591000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 59288000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 16182000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 44998000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 13186000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 28816000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Revenues · Natural Gas Distribution
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 20550000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 62894000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 7983000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 43086000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 11626000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 35103000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 23478000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 40703000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 9736000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 18705000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 5767000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 8969000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Revenues · Pipelineand Midstream
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 14185000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 4439000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 10778000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 4977000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 6339000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1362000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 13139000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 3537000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 9903000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 4110000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 6366000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Other Revenues · Pipeline
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 2504000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1362000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Other Revenues · Corporate And Other
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 199000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 722000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 182000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 540000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 179000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 358000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 179000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 195000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 22000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 82000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 22000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 59000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Outside Specialty Contracting · Construction Services
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OutsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 216062000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 583803000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 190881000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 367741000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Outside Specialty Contracting · Electric
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OutsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Outside Specialty Contracting · Natural Gas Distribution
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OutsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Outside Specialty Contracting · Pipelineand Midstream
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OutsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Outside Specialty Contracting · Corporate And Other
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=mdu:OutsideSpecialtyContractingMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Natural Gas Storage · Construction Services
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Natural Gas Storage · Electric
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Storage · Natural Gas Distribution
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Storage · Pipelineand Midstream
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-12-31 | 23270000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 5680000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 16882000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 5172000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 11202000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 6030000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 23690000 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 6053000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 16766000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 5331000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 10713000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Storage · Pipeline
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 5467000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 6030000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Natural Gas Storage · Corporate And Other
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Regulated Operation · Electric
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:RegulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 108384000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 315268000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 99157000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 206883000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Regulated Operation · Natural Gas Distribution
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:RegulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 133517000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 794418000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 201431000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 660901000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Regulated Operation · Pipelineand Midstream
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:RegulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 44152000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 102929000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 39956000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 58777000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Unregulated Operation · Construction Services
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:UnregulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 760986000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 2089711000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 703124000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1328726000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Unregulated Operation · Pipelineand Midstream
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:UnregulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 3476000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 9542000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 3875000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 6066000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Unregulated Operation · Corporate And Other
Consolidation Items · Public Utility Regulated Or Unregulated Status · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:PublicUtilityRegulatedOrUnregulatedStatusAxis=us-gaap:UnregulatedOperationMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 1000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 18000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 17000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Construction Services
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 760986000 Restated | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 2089711000 Restated | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 703124000 Restated | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1328726000 Restated | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Operating Segments · Electric
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 115916000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 236934000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 121018000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 437777000 Restated | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 117662000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 327808000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 97886000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 210147000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 112261000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 414406000 Restated | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 108468000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 315385000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 99173000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 206916000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Natural Gas Distribution
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 212647000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 674994000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 462347000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 1283130000 Restated | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 144215000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 890257000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 206794000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 746041000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 539248000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1200975000 Restated | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 133590000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 794519000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 201445000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 660930000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Pipelineand Midstream
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 22612000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 154159000 Restated | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 53159000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 122990000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 46507000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 69831000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 23323000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 142597000 Restated | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 47635000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 112518000 Restated | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 43851000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 64883000 Restated | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Operating Segments · Pipeline
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 46740000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 69352000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 22612000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 46507000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 69831000 Restated | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 23323000 Restated | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
Operating Segments · Corporate And Other
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 0 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | -1000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1000 | USD | 2026-05-08 · 01:12:16.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2026-02-20 · 18:32:41.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 18000 | USD | 2025-11-10 · 18:31:45.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 17000 | USD | 2025-08-07 · 16:37:29.000Z | Open filing evidence |
Commercial Utility Sales · Operating Segments · Construction Services
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Commercial Utility Sales · Operating Segments · Electric
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 48477000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 171760000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 46648000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 129783000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 41620000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 83135000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Commercial Utility Sales · Operating Segments · Natural Gas Distribution
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 192331000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 399087000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 37687000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 264091000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 64274000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 226404000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Commercial Utility Sales · Operating Segments · Pipelineand Midstream
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Commercial Utility Sales · Operating Segments · Corporate And Other
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Commercial Utility Sales · Electric · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 50479000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 99663000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 43428000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 91905000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Commercial Utility Sales · Natural Gas Distribution · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 66432000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 223800000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 65699000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 258030000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Commercial Utility Sales · Pipeline · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Commercial Utility Sales · Corporate And Other · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:CommercialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Industrial Utility Sales · Operating Segments · Construction Services
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Industrial Utility Sales · Operating Segments · Electric
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 9164000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 42883000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 9702000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 32809000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 11758000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 23107000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Industrial Utility Sales · Operating Segments · Natural Gas Distribution
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 15462000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 42588000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 6869000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 30716000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 9268000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 23847000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Industrial Utility Sales · Operating Segments · Pipelineand Midstream
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Industrial Utility Sales · Operating Segments · Corporate And Other
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Industrial Utility Sales · Electric · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 10946000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 20956000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 9247000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 18411000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Industrial Utility Sales · Natural Gas Distribution · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 8593000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 21005000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 9098000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 24560000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Industrial Utility Sales · Pipeline · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Industrial Utility Sales · Corporate And Other · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:IndustrialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Utility Sales · Operating Segments · Construction Services
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Other Utility Sales · Operating Segments · Electric
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 1850000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 7910000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2045000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 6046000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2065000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 4001000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Other Utility Sales · Operating Segments · Natural Gas Distribution
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Other Utility Sales · Operating Segments · Pipelineand Midstream
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Other Utility Sales · Operating Segments · Corporate And Other
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Other Utility Sales · Electric · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 2083000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 4043000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1793000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 3643000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Utility Sales · Natural Gas Distribution · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Utility Sales · Pipeline · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Utility Sales · Corporate And Other · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:OtherUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Residential Utility Sales · Operating Segments · Construction Services
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ConstructionServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Residential Utility Sales · Operating Segments · Electric
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 39685000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 140054000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 37076000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 107735000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 31437000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 70659000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Residential Utility Sales · Operating Segments · Natural Gas Distribution
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 289235000 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 646049000 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 61928000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 431721000 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 106690000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 369793000 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Residential Utility Sales · Operating Segments · Pipelineand Midstream
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineandMidstreamMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Residential Utility Sales · Operating Segments · Corporate And Other
Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 0 | USD | 2025-05-08 · 16:38:00.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 0 | USD | 2025-02-21 · 00:35:25.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 0 | USD | 2024-11-07 · 18:47:24.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-08-08 · 16:38:01.000Z | Open filing evidence |
Residential Utility Sales · Electric · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 35080000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 74481000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 28569000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 68254000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Residential Utility Sales · Natural Gas Distribution · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 106001000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 352327000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 100041000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 389276000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Residential Utility Sales · Pipeline · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Residential Utility Sales · Corporate And Other · Operating Segments
Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=mdu:ResidentialUtilitySalesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Transportation · Electric · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Transportation · Natural Gas Distribution · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 16834000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 34340000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 15814000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 33524000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Transportation · Pipeline · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 47173000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 96250000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 46120000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 95373000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Transportation · Corporate And Other · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:NaturalGasTransportationMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Revenues · Electric · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 18600000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 40864000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 17123000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 34714000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Revenues · Natural Gas Distribution · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 11371000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 31921000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 11626000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 35103000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Revenues · Pipeline · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 4061000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 6565000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 4977000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 6339000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Other Revenues · Corporate And Other · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=mdu:OtherRevenuesMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 201000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 400000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 179000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 358000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Storage · Electric · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:ElectricMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Storage · Natural Gas Distribution · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:NaturalGasDistributionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Storage · Pipeline · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=mdu:PipelineMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 5530000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 10997000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 5172000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 11202000 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
Natural Gas Storage · Corporate And Other · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 0 | USD | 2026-08-07 · 00:20:19.000Z | Open filing evidence |