XML 47 R33.htm IDEA: XBRL DOCUMENT
v3.24.4

Revenue from Contracts with Customers (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | $ 513,836 | $ 500,050
Alternative Revenue Programs | 5,917 | 5,556
Derivative Financial Instruments | 29,729 | 19,755
Total Revenues | 549,482 | 525,361
All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Alternative Revenue Programs | 0 | 0
Derivative Financial Instruments | 0 | 0
Total Revenues | 0 | 0
Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | (95,630) | (87,666)
Alternative Revenue Programs | 0 | 0
Derivative Financial Instruments | 0 | 0
Total Revenues | (95,630) | (87,666)
Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 219,131 | 234,264
Alternative Revenue Programs | 0 | 0
Derivative Financial Instruments | 29,729 | 19,755
Total Revenues | 248,860 | 254,019
Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 106,612 | 94,413
Alternative Revenue Programs | 0 | 0
Derivative Financial Instruments | 0 | 0
Total Revenues | 106,612 | 94,413
Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 61,131 | 62,588
Alternative Revenue Programs | 0 | 0
Derivative Financial Instruments | 0 | 0
Total Revenues | 61,131 | 62,588
Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 222,592 | 196,451
Alternative Revenue Programs | 5,917 | 5,556
Derivative Financial Instruments | 0 | 0
Total Revenues | 228,509 | 202,007
Production of Natural Gas |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 217,458 | 232,661
Production of Natural Gas | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Natural Gas | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Natural Gas | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 217,458 | 232,661
Production of Natural Gas | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Natural Gas | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Natural Gas | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Crude Oil |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 515 | 687
Production of Crude Oil | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Crude Oil | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Crude Oil | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 515 | 687
Production of Crude Oil | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Crude Oil | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Production of Crude Oil | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Processing |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 275 | 267
Natural Gas Processing | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Processing | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Processing | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 275 | 267
Natural Gas Processing | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Processing | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Processing | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Gathering Service |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 3,448 | 4,596
Natural Gas Gathering Service | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Gathering Service | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | (57,683) | (57,992)
Natural Gas Gathering Service | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Gathering Service | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Gathering Service | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 61,131 | 62,588
Natural Gas Gathering Service | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Transportation Service |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 80,944 | 80,541
Natural Gas Transportation Service | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Transportation Service | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | (27,181) | (20,362)
Natural Gas Transportation Service | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Transportation Service | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 81,204 | 71,618
Natural Gas Transportation Service | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Transportation Service | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 26,921 | 29,285
Natural Gas Storage Service |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 14,489 | 12,233
Natural Gas Storage Service | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Storage Service | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | (10,504) | (9,059)
Natural Gas Storage Service | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Storage Service | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 24,993 | 21,292
Natural Gas Storage Service | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Storage Service | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Residential Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 156,350 | 146,546
Natural Gas Residential Sales | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Residential Sales | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Residential Sales | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Residential Sales | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Residential Sales | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Residential Sales | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 156,350 | 146,546
Natural Gas Commercial Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 22,243 | 20,281
Natural Gas Commercial Sales | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Commercial Sales | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Commercial Sales | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Commercial Sales | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Commercial Sales | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Commercial Sales | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 22,243 | 20,281
Natural Gas Industrial Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 1,337 | 904
Natural Gas Industrial Sales | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Industrial Sales | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | (1) | (2)
Natural Gas Industrial Sales | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Industrial Sales | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Industrial Sales | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Natural Gas Industrial Sales | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 1,338 | 906
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 16,777 | 1,334
Other | All Other |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Other | Corporate and Intersegment Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | (261) | (251)
Other | Exploration and Production | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 883 | 649
Other | Pipeline and Storage | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 415 | 1,503
Other | Gathering | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | 0 | 0
Other | Utility | Total Reportable Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues from Contracts with Customers | $ 15,740 | $ (567)

X
- Definition Adjustments to revenue from alternative revenue programs outside scope of authoritative guidance on revenue recognition designed to mitigate the impact of weather and conservation, to adjust billings for the effects of broad external factors and to compensate the Company for demand-side management initiatives. + References No definition available. + Details
Name: | nfg_AlternativeRevenuePrograms
Namespace Prefix: | nfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-4 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=nfg_ExplorationAndProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=nfg_PipelineAndStorageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=nfg_GatheringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=nfg_UtilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_NaturalGasProductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=nfg_ProductionofCrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=nfg_NaturalGasProcessingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_NaturalGasMidstreamMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OilAndGasServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_NaturalGasStorageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=nfg_NaturalGasResidentialSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=nfg_NaturalGasCommercialSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=nfg_NaturalGasIndustrialSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProductAndServiceOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |