Fundies. English
Segment disclosures
Company overviewALLETE, Inc
Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.
Revenue · Reported segment facts
77 dimension combinations 760 retained observations 22 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.
Corporate Non Segment · Corporate And Other
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 202800000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 62600000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 167500000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 59000000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 104900000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 45900000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 223000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 50300000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 161200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 60100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 110900000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 50800000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 193100000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
Corporate Non Segment · Corporate And Other · Longterm Contract
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermContractMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 27300000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 52700000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 25400000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 23900000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 49400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 25500000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Operating Segments · Sale Of Wind Energy Facility · ALLETE Clean Energy
Consolidation Items · Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfWindEnergyFacilityMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 0 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 0 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 22900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 22900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 0 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 181800000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Operating Segments · ALLETE Clean Energy
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 12300000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 44100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 15300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 31800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 16500000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 84300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 34100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 68900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 15700000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 34800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 19100000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 418500000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 14200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 396800000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 181100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 382600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 201500000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 118300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
Operating Segments · ALLETE Clean Energy · Longterm PSA
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermPSAMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 14500000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 32300000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 17800000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 13200000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 31600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 18400000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Operating Segments · ALLETE Clean Energy · Sale Of Wind Energy Facility
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfWindEnergyFacilityMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 0 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 0 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 166600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 348400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
Operating Segments · New Energy
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:NewEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 15900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 51900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 14600000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 36000000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 21400000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 31800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 77200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 28400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 45400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 17000000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
Operating Segments · Regulated Operations
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 320200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 958100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 305100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 637900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 332800000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1242700000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 310500000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 928600000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 279800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 618100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 338300000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1238300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 314300000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 919100000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 292200000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 604800000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1259300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 322600000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 960300000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Operating Segments · Regulated Operations · Commercial
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CommercialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 43800000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 93500000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 49200000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 140900000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 44000000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 91700000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 49000000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 141700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Operating Segments · Regulated Operations · Industrial
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:IndustrialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 146800000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 306300000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 140200000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 285100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
Operating Segments · Regulated Operations · Municipal
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:MunicipalMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 7400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 16400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 7600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 16500000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
Operating Segments · Regulated Operations · Other
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 14300000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 42900000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 28100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 53900000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
Operating Segments · Regulated Operations · Other Power Suppliers
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherPowerSuppliersMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 30400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 70400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 36300000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 72200000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
Operating Segments · Regulated Operations · Residential
Consolidation Items · Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:ResidentialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | 37100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 88600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 37900000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 123300000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 36000000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 85400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 40100000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 136700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Capital Project · U.S.Water Services
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CapitalProjectMember;us-gaap:StatementBusinessSegmentsAxis=ale:U.S.WaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
CIP Financial Incentive · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CIPFinancialIncentiveMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 2400000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 2400000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
Commercial · Operating Segments · Regulated Operations
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CommercialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 49500000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 143000000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 49200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 140900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
Commercial · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 51700000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 189800000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 49700000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 184600000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 187200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 48300000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 168600000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 39700000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 139500000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 37100000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 103200000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 28800000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 66100000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Contract · U.S.Water Services
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:ContractMember;us-gaap:StatementBusinessSegmentsAxis=ale:U.S.WaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-07-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Corporate Other Other · Corporate Non Segment · Corporate And Other
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CorporateOtherOtherMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 6700000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 19400000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 6100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 12700000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 6600000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 4900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 14000000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 3600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 9100000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 5500000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Corporate Other Other · New Energy
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CorporateOtherOtherMember;us-gaap:StatementBusinessSegmentsAxis=ale:NewEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 3200000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 3100000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
Corporate Other Other · Corporate And Other
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CorporateOtherOtherMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 3400000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 25000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 3500000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 29300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 5500000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 30000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 4500000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 15500000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 3700000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 20000000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 3400000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 9200000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 2200000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 5800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 16200000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 2300000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 6100000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Corporate Other Other · Corporate And Other · Corporate Non Segment
Contract With Customer Sales Channel · Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:CorporateOtherOtherMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 4900000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 14000000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 4500000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 15500000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Industrial · Operating Segments · Regulated Operations
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:IndustrialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 149800000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 456100000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 154300000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 439400000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 147300000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 445700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Industrial · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 139900000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 610800000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 159500000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 593600000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 144900000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 589000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 147300000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 445700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 147800000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 565500000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 139700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 407800000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 129000000 | USD | 2021-05-05 · 21:40:15.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 432800000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 109600000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 316400000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 88000000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 206800000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Industrial · Regulated Operations · Operating Segments
Contract With Customer Sales Channel · Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 159500000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 144900000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Longterm Contract · Corporate Non Segment · Corporate And Other
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermContractMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 26700000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 79400000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 24600000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 74000000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
Longterm Contract · Corporate And Other
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermContractMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 26100000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 105700000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 25400000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 101200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 25500000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 89200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 23500000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 67500000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 22600000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 84400000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 20300000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 63400000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 21400000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 43100000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 21700000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 86000000 | USD | 2021-02-16 · 23:14:10.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 20700000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 65600000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 22500000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 44900000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Longterm PSA · Operating Segments · ALLETE Clean Energy
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermPSAMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 9900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 42200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 12900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 44500000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
Longterm PSA · ALLETE Clean Energy
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermPSAMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 15000000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 56400000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 17800000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 65000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 77200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 75500000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 14000000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 50800000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 18700000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 36800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 68300000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 11900000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 44000000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 14800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 32100000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Longterm PSA · ALLETE Clean Energy · Operating Segments
Contract With Customer Sales Channel · Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermPSAMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 12900000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 44500000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 14400000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 58700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Municipal · Operating Segments · Regulated Operations
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:MunicipalMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 9200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 25600000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 8700000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 25200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 9800000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 31900000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Municipal · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:MunicipalMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 9600000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 34200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 9000000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 33400000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 40200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 52000000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 41200000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 9000000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 19300000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Other · Operating Segments · Regulated Operations
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 28100000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 71000000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 33200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 87100000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 29700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 79700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Other · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 28100000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 93700000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 28600000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 114900000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 101200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 109900000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 27700000 | USD | 2021-05-05 · 21:40:15.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 91900000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 29700000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 69600000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 20200000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 39900000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Other Power Suppliers · Operating Segments · Regulated Operations
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherPowerSuppliersMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 32000000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 102400000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 31000000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 103200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 46700000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 124600000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Other Power Suppliers · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherPowerSuppliersMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 47100000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 137200000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 40000000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 146100000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 165800000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 168700000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 138800000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 27400000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 65700000 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Pointin Time · U.S.Water Services
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:PointinTimeMember;us-gaap:StatementBusinessSegmentsAxis=ale:U.S.WaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
Residential · Operating Segments · Regulated Operations
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:ResidentialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 41900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 130500000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 37900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 123300000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
Residential · Regulated Operations
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 56400000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 177000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 51500000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 165700000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 49400000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 175900000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 40100000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 136700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 40600000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 96600000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 56000000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 160800000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 37000000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 118000000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 35400000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 81000000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 140700000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 34200000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 102500000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
Sale Of Renewable Development Projects · Corporate Non Segment · Corporate And Other
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfRenewableDevelopmentProjectsMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 29200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 68700000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 25600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 39500000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 13900000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 20800000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 73200000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 32600000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 52400000 | USD | 2024-07-31 · 22:05:48.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 19800000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Sale Of Renewable Development Projects · New Energy
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfRenewableDevelopmentProjectsMember;us-gaap:StatementBusinessSegmentsAxis=ale:NewEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 18200000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 13900000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
Sale Of Renewable Development Projects · Corporate And Other
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfRenewableDevelopmentProjectsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 72100000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 92500000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 19800000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 73900000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 22100000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 36600000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 0 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 0 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
Sale Of Renewable Development Projects · Corporate And Other · Corporate Non Segment
Contract With Customer Sales Channel · Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfRenewableDevelopmentProjectsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 20800000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 73200000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 22100000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 36600000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Sale Of Wind Energy Facility · Operating Segments · ALLETE Clean Energy
Contract With Customer Sales Channel · Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfWindEnergyFacilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-07-01 – 2024-09-30 | 22900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 22900000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-07-01 – 2023-09-30 | 0 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 348400000 | USD | 2024-10-29 · 23:02:22.000Z | Open filing evidence |
Sale Of Wind Energy Facility · ALLETE Clean Energy
Contract With Customer Sales Channel · Statement Business Segments
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfWindEnergyFacilityMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 22900000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 348400000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 33500000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
Sale Of Wind Energy Facility · ALLETE Clean Energy · Operating Segments
Contract With Customer Sales Channel · Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfWindEnergyFacilityMember;us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 0 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 348400000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 0 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 0 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
ALLETE Clean Energy
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 12300000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 44100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 15300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 31800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 16500000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 84300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 34100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 68900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 15700000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 34800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 19100000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 418500000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 181100000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 382600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 201500000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 118300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 15600000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 65000000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 21200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 49400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 28200000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 86900000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 16900000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 59400000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 21600000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 42500000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 20900000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 79600000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 14800000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 52500000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 17600000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 37700000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
ALLETE Clean Energy · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 14200000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 396800000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 15600000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 65000000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
ALLETE Clean Energy · Longterm PSA
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermPSAMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 10800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 39700000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 13900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 28900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 9900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 42200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 14500000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 32300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 65000000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 13200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 31600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 18400000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 77200000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 14400000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 58700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 18900000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 44300000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 25400000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 75500000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 14000000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 50800000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 18700000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 36800000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 18100000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 68300000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 11900000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 44000000 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
ALLETE Clean Energy · Sale Of Wind Energy Facility
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:ALLETECleanEnergyMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfWindEnergyFacilityMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 348400000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 166600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 348400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 181800000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 33500000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 0 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 0 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 0 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 0 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
New Energy
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:NewEnergyMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 15900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 51900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 14600000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 36000000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 21400000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 31800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 77200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 28400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 45400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 17000000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
New Energy · Corporate Other Other
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:NewEnergyMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CorporateOtherOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 7900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 15700000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 4600000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 7800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2600000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 8500000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 5900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
New Energy · Sale Of Renewable Development Projects
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:NewEnergyMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfRenewableDevelopmentProjectsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 8000000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 36200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 10000000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 28200000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 29200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 68700000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 25600000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 39500000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
Regulated Operations
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 320200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 958100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 305100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 637900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 332800000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1242700000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 310500000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 928600000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 279800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 618100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 338300000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1238300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 292200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 604800000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 312600000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1259300000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 322600000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 960300000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 308700000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 637700000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 329000000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1227900000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 304800000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 888200000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 290400000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 583400000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 293000000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 987300000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 255100000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 721200000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 200800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 466100000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Regulated Operations · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 338300000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 312600000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Regulated Operations · Operating Segments · Commercial
Statement Business Segments · Consolidation Items · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CommercialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 49700000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 47700000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Regulated Operations · Operating Segments · Residential
Statement Business Segments · Consolidation Items · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:ResidentialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 51500000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 49400000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Regulated Operations · CIP Financial Incentive
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CIPFinancialIncentiveMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-07-01 – 2021-09-30 | 2400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 2400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 2400000 | USD | 2021-02-16 · 23:14:10.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 2400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 2400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
Regulated Operations · Commercial
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CommercialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 50100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 147100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 45300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 97000000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 49500000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 143000000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 43800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 93500000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 44000000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 91700000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 47700000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 49000000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 141700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 44400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 92700000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 48300000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 44300000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 124700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 40700000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 80400000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 37100000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 103200000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 28800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 66100000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Regulated Operations · Industrial
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:IndustrialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 143000000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 420100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 137200000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 277100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 149800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 456100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 146800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 306300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 593600000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 140200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 285100000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 589000000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 150600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 298400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 147800000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 565500000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 139700000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 407800000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 139100000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 268100000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 129000000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 109600000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 316400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 88000000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 206800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Regulated Operations · Municipal
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:MunicipalMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 9400000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 27200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 8200000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 17800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 9200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 25600000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 7400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 16400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 7600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 16500000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 8900000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 40200000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 9800000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 31900000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 10000000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 22100000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 12100000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 52000000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 14400000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 38500000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 11500000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 24100000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 12600000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 41200000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 11200000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 30500000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 9000000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 19300000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Regulated Operations · Municipal · Operating Segments
Statement Business Segments · Contract With Customer Sales Channel · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:MunicipalMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 9000000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 8900000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Regulated Operations · Other
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 27000000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 82200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 27100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 55200000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 28100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 71000000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 14300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 42900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 114900000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 28100000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 53900000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 25800000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 101200000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 29700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 79700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 26200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 50000000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 23800000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 112300000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 28200000 Restated | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 82300000 Restated | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 26400000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 54100000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 27700000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 94300000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 29700000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 69600000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 20200000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 39900000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Regulated Operations · Other · Operating Segments
Statement Business Segments · Contract With Customer Sales Channel · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 28600000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 25800000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Regulated Operations · Other Power Suppliers
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherPowerSuppliersMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 47200000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 141600000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 47300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 94400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 32000000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 102400000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 30400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 70400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 36300000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 72200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 35900000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 165800000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 46700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 124600000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 36900000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 77900000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 41000000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 168700000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 41200000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 116900000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 37300000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 75700000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 38400000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 138800000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 30900000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 96600000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 27400000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 65700000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Regulated Operations · Other Power Suppliers · Operating Segments
Statement Business Segments · Contract With Customer Sales Channel · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:OtherPowerSuppliersMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-03-31 | 40000000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 35900000 | USD | 2024-05-09 · 10:07:36.000Z | Open filing evidence |
Regulated Operations · Residential
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:RegulatedOperationsMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:ResidentialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 43500000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 139900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 40000000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 96400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 41900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 130500000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 37100000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 88600000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 36000000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 85400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 40600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 96600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 56000000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 35400000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 81000000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 45600000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 27400000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 68300000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
U.S.Water Services
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:U.S.WaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
U.S.Water Services · Capital Project
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:U.S.WaterServicesMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CapitalProjectMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 0 | USD | 2021-02-16 · 23:14:10.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 0 | USD | 2020-11-09 · 11:04:12.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 0 | USD | 2020-08-04 · 23:49:04.000Z | Open filing evidence |
U.S.Water Services · Contract
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=ale:U.S.WaterServicesMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:ContractMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 0 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
Corporate And Other
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 26600000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 81400000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 25300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 54800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 29500000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 202800000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 30800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 90300000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 30600000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 59500000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 28900000 | USD | 2025-05-07 · 21:35:37.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 223000000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 60100000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 110900000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-03-31 | 50800000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 193100000 | USD | 2025-02-13 · 00:11:23.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 50100000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 119600000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 43200000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 69500000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 26300000 | USD | 2023-05-02 · 21:43:11.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 104400000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 23700000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 72600000 | USD | 2022-11-08 · 22:38:41.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 23600000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 48900000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 25300000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 102200000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 24000000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 75000000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-04-01 – 2020-06-30 | 24800000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
| 2020-01-01 – 2020-06-30 | 51000000 | USD | 2021-08-03 · 21:44:34.000Z | Open filing evidence |
Corporate And Other · Corporate Non Segment
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 50300000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 161200000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 50100000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 119600000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Corporate And Other · Corporate Other Other
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:CorporateOtherOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 2800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 9100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2900000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 6300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 4100000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 10900000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 3300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 6800000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 29300000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 3600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 9100000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 30000000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 7300000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 11000000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-03-31 | 3700000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 20000000 | USD | 2024-02-20 · 11:05:44.000Z | Open filing evidence |
| 2021-07-01 – 2021-09-30 | 3400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-01-01 – 2021-09-30 | 9200000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 2200000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 5800000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 3600000 | USD | 2022-05-04 · 21:40:31.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 16200000 | USD | 2022-02-15 · 22:41:34.000Z | Open filing evidence |
| 2020-07-01 – 2020-09-30 | 3300000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
| 2020-01-01 – 2020-09-30 | 9400000 | USD | 2021-11-03 · 21:44:24.000Z | Open filing evidence |
Corporate And Other · Longterm Contract
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermContractMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-07-01 – 2025-09-30 | 23800000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 72300000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 22400000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 48500000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 26700000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 79400000 | USD | 2025-10-30 · 21:46:37.000Z | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 27300000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 52700000 | USD | 2025-08-07 · 00:53:53.000Z | Open filing evidence |
| 2023-04-01 – 2023-06-30 | 23900000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 49400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 89200000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 21400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 44000000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 84400000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 21400000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 43100000 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-03-31 | 21700000 | USD | 2021-05-05 · 21:40:15.000Z | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 86000000 | USD | 2023-02-15 · 23:08:58.000Z | Open filing evidence |
Corporate And Other · Longterm Contract · Corporate Non Segment
Statement Business Segments · Contract With Customer Sales Channel · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:LongtermContractMember;srt:ConsolidationItemsAxis=us-gaap:CorporateNonSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-07-01 – 2023-09-30 | 24600000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2023-01-01 – 2023-09-30 | 74000000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-07-01 – 2022-09-30 | 23500000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
| 2022-01-01 – 2022-09-30 | 67500000 | USD | 2023-11-01 · 21:40:04.000Z | Open filing evidence |
Corporate And Other · Sale Of Renewable Development Projects
Statement Business Segments · Contract With Customer Sales Channel
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:CorporateAndOtherMember;us-gaap:ContractWithCustomerSalesChannelAxis=ale:SaleOfRenewableDevelopmentProjectsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-04-01 – 2023-06-30 | 32600000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2023-01-01 – 2023-06-30 | 52400000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-04-01 – 2022-06-30 | 14500000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2022-01-01 – 2022-06-30 | 14500000 | USD | 2023-08-07 · 21:44:18.000Z | Open filing evidence |
| 2021-04-01 – 2021-06-30 | 0 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |
| 2021-01-01 – 2021-06-30 | 0 | USD | 2022-08-02 · 21:41:51.000Z | Open filing evidence |