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Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Accounting Policies [Abstract]    
Balance at beginning of period $ 231 $ 204
Accretion expense 13 12
Divestitures (33) 0
Acquisitions 43 12
New obligations 10 10
Settlements (16) (7)
Balance at end of period 248 231
Asset Retirement Obligation, Current $ 2 $ 3