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Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Contract With Customer, Liability [Line Items] |  |  |  |
Contract with Customer, Liability - Beginning of Period | $ 917 | $ 1,016 | $ 948 | $ 1,046
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 86 | 86 | 127 | 120
Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination | 0 | 23 | 0 | 23
Other Significant Noncash Transaction, Value of Consideration Received | 1 | 2 | 3 | 4
Contract with Customer, Liability, Revenue Recognized | (72) | (73) | (146) | (139)
Contract with Customer, Liability - End of Period | 932 | 1,054 | 932 | 1,054
Transcontinental Gas Pipe Line Company, LLC [Member] |  |  |  |
Contract With Customer, Liability [Line Items] |  |  |  |
Contract with Customer, Liability - Beginning of Period | 160 | 171 | 163 | 173
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 Acquired in Business Combination | 0 | 0 | 0 | 0
Other Significant Noncash Transaction, Value of Consideration Received | 0 | 0 | 0 | 0
Contract with Customer, Liability, Revenue Recognized | (3) | (3) | (6) | (5)
Contract with Customer, Liability - End of Period | $ 157 | $ 168 | $ 157 | $ 168

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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 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-11 Reference 2: 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 3: 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 4: 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 increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from business combination. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (a) -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://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 + Details
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- Definition [Line Items] for Contract With Customer, Liability [Table] + References No definition available. + Details
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- Details
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