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Segment disclosures

Company overview

NATIONAL FUEL GAS CO

Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.

Revenue · Reported segment facts

121 dimension combinations 786 retained observations 9 reported periods Partial retained history

Counts describe retained dimensioned rows only. Periods and members can change across reports, and this view does not infer missing values or expected segment totals.

Material Reconciling Items · All Other Segments And Reconciling Items

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:MaterialReconcilingItemsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:AllOtherSegmentsAndReconcilingItemsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · One Customer · Customer Concentration Risk · Sales Revenue Net · Integrated Upstream And Gathering

Consolidation Items · Major Customers · Concentration Risk By Type · Concentration Risk By Benchmark · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=nfg:OneCustomerMember;us-gaap:ConcentrationRiskByTypeAxis=us-gaap:CustomerConcentrationRiskMember;us-gaap:ConcentrationRiskByBenchmarkAxis=us-gaap:SalesRevenueNetMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30258000000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · One Customer · Customer Concentration Risk · Sales Revenue Net · Pipeline And Storage

Consolidation Items · Major Customers · Concentration Risk By Type · Concentration Risk By Benchmark · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=nfg:OneCustomerMember;us-gaap:ConcentrationRiskByTypeAxis=us-gaap:CustomerConcentrationRiskMember;us-gaap:ConcentrationRiskByBenchmarkAxis=us-gaap:SalesRevenueNetMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-3016000000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Commercial Sales · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Commercial Sales · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Commercial Sales · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Commercial Sales · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Commercial Sales · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-3150887000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-3178764000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-3127877000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-3084515000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-3015349000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-3077194000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3139602000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-3161845000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-3122243000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-3068466000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-3011022000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-3062117000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Industrial Sales · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Industrial Sales · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Industrial Sales · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Industrial Sales · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Industrial Sales · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-312558000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-313967000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-311409000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-304403000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30732000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-304007000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-311937000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-313275000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-311338000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-303103000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-30480000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-302668000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Processing · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-30267000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30881000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31338000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31613000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31275000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-301053000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-30195000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30765000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Processing · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Processing · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31200000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31364000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31164000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-301196000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-31338000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31613000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31275000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-301053000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Processing · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Processing · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Residential Sales · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Residential Sales · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Residential Sales · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Residential Sales · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Residential Sales · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31322969000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31520978000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31198008000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30596988000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30118551000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30532001000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31257100000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31413450000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31156350000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30502744000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-3089034000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30445971000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Productionof Crude Oil · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-30434000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-301341000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31393000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31907000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31515000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-302298000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-30511000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-301722000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Productionof Crude Oil · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Productionof Crude Oil · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31439000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31731000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31292000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-301837000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-31393000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31907000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31515000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-302298000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Productionof Crude Oil · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Productionof Crude Oil · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Midstream · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Midstream · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-3067873000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30194034000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3165030000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31126161000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-3161131000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30244225000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-3060120000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30186701000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Midstream · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-312624000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-315390000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-312767000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-3011813000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-313233000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-316681000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-313448000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-3015537000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Midstream · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Midstream · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Production · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-30300137000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30836000000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31318404000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31535863000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31217458000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30738778000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-30144374000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30580233000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Production · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Production · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31400217000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31702677000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31302460000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-301104283000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-31318404000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31535863000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31217458000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30738778000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Production · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Production · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Storage · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Storage · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Storage · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Natural Gas Storage · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-3125677000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-3150814000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-3125137000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30100292000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-3025028000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-3075309000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3125288000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-3150281000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-3124993000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-3095933000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-3024612000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-3071247000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Natural Gas Storage · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Oil And Gas Service · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Oil And Gas Service · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Oil And Gas Service · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Oil And Gas Service · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-3183048000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31164056000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-3181008000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30324179000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-3080235000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30243921000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3182481000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31163686000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-3181204000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30311900000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-3079640000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30232532000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Oil And Gas Service · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-3148578000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-3181196000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-3132618000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30109443000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-3021639000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-3093815000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3145256000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-3172176000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-3126921000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30103866000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-3021690000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-3088817000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Product And Service Other · Exploration And Production

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-30530000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-302070000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31657000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-311541000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31883000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-301937000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-30363000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-301416000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Product And Service Other · Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-310 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-310 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-300 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Product And Service Other · Integrated Upstream And Gathering

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-314037000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-318182000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-314145000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-3018050000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-01-01 – 2025-03-31657000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-311541000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31883000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-301937000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Product And Service Other · Pipeline And Storage

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-312738000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-313494000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31756000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-303130000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30316000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-302535000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-311804000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-312219000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31415000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-304560000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-301167000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-304073000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Product And Service Other · Utility

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-312889000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-311865000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31-1024000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-3010813000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30-633000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-3012507000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31-3228000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-3112512000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-3115740000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30-1256000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-30-618000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30-2066000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Exploration And Production

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-30303883000 RestatedUSD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30864701000 RestatedUSD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31311958000 RestatedUSD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31560818000 RestatedUSD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31248860000 RestatedUSD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30961078000 RestatedUSD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-30220905000 RestatedUSD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30739537000 RestatedUSD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Exploration And Production · Natural Gas Midstream

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Operating Segments · Exploration And Production · Natural Gas Storage

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Operating Segments · Exploration And Production · Oil And Gas Service

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Operating Segments · Exploration And Production · Product And Service Other

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-30363000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-301416000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Operating Segments · Gathering

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-3067873000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30194034000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3165030000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31126161000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-3161131000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30244225000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-3060120000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30186701000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Integrated Upstream And Gathering

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30302516000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30984561000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-31358823000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31682045000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31323223000 RestatedUSD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-301184136000 RestatedUSD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30306402000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30873901000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-31315191000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31567499000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31252308000 RestatedUSD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30976615000 RestatedUSD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Pipeline And Storage

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30106541000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30324905000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-31111463000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31218364000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31106901000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30427601000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30105579000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30321765000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-31109573000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31216186000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31106612000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30412393000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-30105419000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30307852000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Total Reportable Segments

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:TotalReportableSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30574557000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-302160018000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-31896200000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-311585461000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31689261000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-302429366000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30569504000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-301925390000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-31768457000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-311355886000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31587429000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-302086370000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Operating Segments · Utility

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30165500000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30850552000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-31425914000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31685052000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31259137000 RestatedUSD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30817629000 RestatedUSD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30157523000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30729724000 RestatedUSD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-31343693000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31572201000 RestatedUSD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31228509000 RestatedUSD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30697362000 RestatedUSD2025-11-21 · 15:47:46.000ZOpen filing evidence
2024-04-01 – 2024-06-30124944000 RestatedUSD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30617456000 RestatedUSD2025-07-31 · 14:44:45.000ZOpen filing evidence

Operating Segments · Utility · Product And Service Other

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-30-618000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-30-2066000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Commercial Sales · Operating Segments · Exploration And Production

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Commercial Sales · Operating Segments · Utility

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-3011022000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-3062117000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Commercial Sales · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Commercial Sales · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Commercial Sales · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3014129000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-3092893000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-3015349000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-3077194000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Industrial Sales · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Industrial Sales · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Industrial Sales · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30885000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-304852000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30732000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-304007000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Processing · Operating Segments · Exploration And Production

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-30195000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-30765000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Processing · Operating Segments · Utility

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Processing · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30245000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30609000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30267000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30881000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Processing · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Processing · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Residential Sales · Operating Segments · Exploration And Production

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Residential Sales · Operating Segments · Utility

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-3089034000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-30445971000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Residential Sales · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Residential Sales · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Residential Sales · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30121502000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30642481000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30118551000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30532001000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Productionof Crude Oil · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30-146000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30585000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30434000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-301341000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Productionof Crude Oil · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Productionof Crude Oil · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Midstream · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-303723000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-309113000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-302519000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-309200000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Midstream · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Midstream · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Production · Operating Segments · Exploration And Production

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationAndProductionMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-30144374000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-30580233000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Production · Operating Segments · Utility

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Natural Gas Production · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30235036000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30937713000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30300137000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30836000000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Production · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Production · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Storage · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Storage · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3025699000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-3076513000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-3025028000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-3075309000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Natural Gas Storage · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Oil And Gas Service · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-300 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Oil And Gas Service · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3080867000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30244923000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-3080235000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30243921000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Oil And Gas Service · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3020561000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30101757000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-3021639000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-3093815000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Product And Service Other · Integrated Upstream And Gathering · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-305400000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-3013582000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30530000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-302070000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Product And Service Other · Pipeline And Storage · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30-25000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-303469000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30316000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-302535000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Product And Service Other · Utility · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-303158000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-305022000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-04-01 – 2025-06-30-633000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-3012507000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence

Explorationand Productionand Other Category

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:ExplorationandProductionandOtherCategoryMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-30303883000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30864701000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31311958000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31560818000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31248860000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30961078000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence
2024-04-01 – 2024-06-30220905000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2023-10-01 – 2024-06-30739537000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence

Gathering · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-3060120000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-30186701000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Operating Segments · Natural Gas Industrial Sales

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:NaturalGasIndustrialSalesMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Operating Segments · Productionof Crude Oil

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=nfg:ProductionofCrudeOilMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Operating Segments · Natural Gas Midstream

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasMidstreamMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-3060120000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-30186701000 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Operating Segments · Natural Gas Storage

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasStorageMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Operating Segments · Oil And Gas Service

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:OilAndGasServiceMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Operating Segments · Product And Service Other

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Natural Gas Commercial Sales · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ProductOrServiceAxis=nfg:NaturalGasCommercialSalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Natural Gas Processing · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ProductOrServiceAxis=nfg:NaturalGasProcessingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Natural Gas Residential Sales · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ProductOrServiceAxis=nfg:NaturalGasResidentialSalesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Gathering · Natural Gas Production · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:GatheringMember;srt:ProductOrServiceAxis=us-gaap:NaturalGasProductionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-04-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence
2023-10-01 – 2024-06-300 USD2024-08-01 · 15:24:19.000ZOpen filing evidence

Integrated Upstream And Gathering And Other

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringAndOtherMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-301184136000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2023-10-01 – 2024-09-30976615000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Integrated Upstream And Gathering

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:IntegratedUpstreamAndGatheringMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30302516000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30984561000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-31358823000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31682045000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31323223000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2025-04-01 – 2025-06-30306402000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30873901000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-31315191000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31567499000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31252308000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence

Pipelineand Storageand Gathering

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineandStorageandGatheringMember
PeriodValueUnitFiledEvidence
2025-04-01 – 2025-06-3070501000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30217116000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-3174418000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31146616000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-3172198000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30286925000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence

Pipeline And Storage

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:PipelineAndStorageMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3069559000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30212558000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-3173762000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31142999000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-3169237000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2024-10-01 – 2025-09-30276131000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-3067982000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30207916000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-3171185000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31139935000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-3168750000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2023-10-01 – 2024-09-30271388000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Total Utility

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:TotalUtilityMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30817274000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence
2025-04-01 – 2025-06-30157446000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2024-10-01 – 2025-06-30729445000 USD2025-07-31 · 14:44:45.000ZOpen filing evidence
2025-01-01 – 2025-03-31343574000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2025-03-31571998000 USD2025-05-01 · 14:32:37.000ZOpen filing evidence
2024-10-01 – 2024-12-31228424000 USD2025-01-30 · 15:53:28.000ZOpen filing evidence
2023-10-01 – 2024-09-30696807000 USD2025-11-21 · 15:47:46.000ZOpen filing evidence

Utilityand Energy Marketing

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityandEnergyMarketingMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-30696807000 USD2024-11-22 · 16:55:16.000ZOpen filing evidence

Utility

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=nfg:UtilityMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30165422000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-10-01 – 2026-06-30850258000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2026-01-01 – 2026-03-31425788000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2026-03-31684837000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2025-10-01 – 2025-12-31259047000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence
2025-04-01 – 2025-06-30157446000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2024-10-01 – 2025-06-30729445000 USD2026-07-30 · 15:54:13.000ZOpen filing evidence
2025-01-01 – 2025-03-31343574000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2025-03-31571998000 USD2026-04-30 · 17:15:44.000ZOpen filing evidence
2024-10-01 – 2024-12-31228424000 USD2026-01-29 · 16:02:23.000ZOpen filing evidence