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Revenue Recognition Contract Assets (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, Asset [Line Items] |  |  |  |
Contract with Customer, Asset, Net - Beginning of Period | $ 104 | $ 50 | $ 98 | $ 36
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 28 | 40 | 58 | 81
Contract with Customer, Asset, Reclassified to Receivable | (30) | (23) | (53) | (50)
Capitalized Contract Cost, Accumulated Amortization |  |  | (1) | 0
Contract with Customer, Asset, Net - End of Period | 102 | 67 | 102 | 67
Transcontinental Gas Pipe Line Company, LLC [Member] |  |  |  |
Contract With Customer, Asset [Line Items] |  |  |  |
Contract with Customer, Asset, Net - Beginning of Period | 14 | 0 | 10 | 0
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 0 | 3 | 4 | 3
Contract with Customer, Asset, Reclassified to Receivable | (1) | 0 | (1) | 0
Capitalized Contract Cost, Accumulated Amortization |  |  | 0 | 0
Contract with Customer, Asset, Net - End of Period | 13 | 3 | 13 | 3
Northwest Pipeline LLC [Member] |  |  |  |
Contract With Customer, Asset [Line Items] |  |  |  |
Contract with Customer, Asset, Net - Beginning of Period | 22 | 18 | 21 | 17
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress | 1 | 1 | 3 | 2
Contract with Customer, Asset, Reclassified to Receivable | 0 | 0 | 0 | 0
Capitalized Contract Cost, Accumulated Amortization |  |  | (1) | 0
Contract with Customer, Asset, Net - End of Period | $ 23 | $ 19 | $ 23 | $ 19

X
- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + 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) 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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- Definition Amount, after allowance for credit loss, of 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/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-3 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 + Details
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- Definition Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Details
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