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Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) a	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) a	Jun. 30, 2023 USD ($)	Mar. 31, 2024 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Gain loss on disposition of assets	$ (15)	$ 41	$ (16)	$ 41
Devon Energy Corporation [Member]
Summary Of Significant Accounting Policies [Line Items]
Voting interest in the joint venture legal entity	30.00%		30.00%
Devon Energy Corporation [Member] | Waterbridge
Summary Of Significant Accounting Policies [Line Items]
Voting interest in the joint venture legal entity	70.00%		70.00%
Water JV [Member]
Summary Of Significant Accounting Policies [Line Items]
Gain loss on disposition of assets		$ 64
WPX and Howard Energy Partners [Member]
Summary Of Significant Accounting Policies [Line Items]
Voting interest in the joint venture legal entity	50.00%		50.00%
Catalyst [Member]
Summary Of Significant Accounting Policies [Line Items]
Area of land | a	50,000		50,000
Fervo [Member]
Summary Of Significant Accounting Policies [Line Items]
Investment					$ 100
Commitment amount funded			$ 55
Committed to making additional investments	$ 45		$ 45

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