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Revenue Recognition Contract Assets (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Contract With Customer, Asset [Line Items] |  |  |  |
Contract with Customer, Asset, Net - Beginning of Period | $ 102 | $ 67 | $ 98 | $ 36
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 13 | 44 | 71 | 125
Contract with Customer, Asset, Reclassified to Receivable | (5) | (23) | (58) | (73)
Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination | 0 | 36 | 0 | 36
Capitalized Contract Cost, Accumulated Amortization | (2) | 0 | (3) | 0
Contract with Customer, Asset, Net - End of Period | 108 | 124 | 108 | 124
Transcontinental Gas Pipe Line Company, LLC [Member] |  |  |  |
Contract With Customer, Asset [Line Items] |  |  |  |
Contract with Customer, Asset, Net - Beginning of Period | 13 | 3 | 10 | 0
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 0 | 4 | 4 | 7
Contract with Customer, Asset, Reclassified to Receivable | 0 | 0 | 0 | 0
Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination | 0 | 0 | 0 | 0
Capitalized Contract Cost, Accumulated Amortization | 0 | 0 | (1) | 0
Contract with Customer, Asset, Net - End of Period | 13 | 7 | 13 | 7
Northwest Pipeline LLC [Member] |  |  |  |
Contract With Customer, Asset [Line Items] |  |  |  |
Contract with Customer, Asset, Net - Beginning of Period | 23 | 19 | 21 | 17
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 2 | 1 | 5 | 3
Contract with Customer, Asset, Reclassified to Receivable | 0 | 0 | 0 | 0
Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination | 0 | 0 | 0 | 0
Capitalized Contract Cost, Accumulated Amortization | (1) | 0 | (2) | 0
Contract with Customer, Asset, Net - End of Period | $ 24 | $ 20 | $ 24 | $ 20

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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) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + 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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- Details
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