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Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Contract With Customer, Liability [Line Items] |  |  |  |
Contract with Customer, Liability - Beginning of Period | $ 1,016 | $ 1,053 | $ 1,046 | $ 1,081
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 86 | 75 | 120 | 117
Contract with Customer, Liability, Increase (Decrease) for Contract from Asset Purchase | 23 | 0 | 23 | 0
Other Significant Noncash Transaction, Value of Consideration Received | 2 | 2 | 4 | 4
Contract with Customer, Liability, Revenue Recognized | (73) | (66) | (139) | (138)
Contract with Customer, Liability - End of Period | 1,054 | 1,064 | 1,054 | 1,064
Transcontinental Gas Pipe Line Company, LLC [Member] |  |  |  |
Contract With Customer, Liability [Line Items] |  |  |  |
Contract with Customer, Liability - Beginning of Period | 171 | 181 | 173 | 184
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 0 | 0 | 0 | 0
Contract with Customer, Liability, Increase (Decrease) for Contract from Asset Purchase | 0 | 0 | 0 | 0
Other Significant Noncash Transaction, Value of Consideration Received | 0 | 0 | 0 | 0
Contract with Customer, Liability, Revenue Recognized | (3) | (2) | (5) | (5)
Contract with Customer, Liability - End of Period | 168 | 179 | 168 | 179
Northwest Pipeline LLC [Member] |  |  |  |
Contract With Customer, Liability [Line Items] |  |  |  |
Contract with Customer, Liability - Beginning of Period | 0 | 1 | 0 | 2
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 0 | 0 | 0 | 0
Contract with Customer, Liability, Increase (Decrease) for Contract from Asset Purchase | 0 | 0 | 0 | 0
Other Significant Noncash Transaction, Value of Consideration Received | 0 | 0 | 0 | 0
Contract with Customer, Liability, Revenue Recognized | 0 | 0 | 0 | (1)
Contract with Customer, Liability - End of Period | $ 0 | $ 1 | $ 0 | $ 1

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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- Definition The value of the noncash (or part noncash) consideration received in a transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
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- Definition Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from asset purchase. + References No definition available. + Details
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- Details
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- Details
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