Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) a	Mar. 31, 2023 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Gain loss on disposition of assets	$ (1)	$ 0
Devon Energy Corporation [Member]
Summary Of Significant Accounting Policies [Line Items]
Voting interest in the joint venture legal entity	30.00%
Devon Energy Corporation [Member] | Waterbridge
Summary Of Significant Accounting Policies [Line Items]
Voting interest in the joint venture legal entity	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%
Catalyst [Member]
Summary Of Significant Accounting Policies [Line Items]
Area of land | a	50,000
Fervo [Member]
Summary Of Significant Accounting Policies [Line Items]
Investment	$ 100
Commitment amount funded	55
Committed to making additional investments	$ 45