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Divestitures (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended
Divestitures (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Feb. 28, 2026	Jan. 30, 2026
Business Combination [Line Items]
Proceeds from disposition of equity-method investments (Note 3)					$ 6	$ 0
Equity Method Investment, Realized Gain (Loss) on Disposal					127	0
Gain on sale of certain assets		$ 12		$ 0	$ 194	$ 0
West [Member] \| Gas Gathering Assets In Mid Continent Region
Business Combination [Line Items]
Disposal Group, Consideration							$ 48
West [Member] \| Brazos Permian II, LLC [Member]
Business Combination [Line Items]
Proceeds from disposition of equity-method investments (Note 3)	$ 143
Equity Method Investment, Realized Gain (Loss) on Disposal	$ 127
Other Operating Segment \| Certain South Mansfield Upstream Interests
Business Combination [Line Items]
Disposal Group, Consideration								$ 398
Gain on sale of certain assets		$ 12	$ 182