Summary of Significant Accounting Policies - (Schedule of Components of Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Summary Of Significant Accounting Policies [Line Items]
Total Investments	$ 713	$ 666
Catalyst [Member]
Summary Of Significant Accounting Policies [Line Items]
Total Investments	$ 300	311
Percentage Of Interest In Investments	50.00%
Water JV [Member]
Summary Of Significant Accounting Policies [Line Items]
Total Investments	$ 217	216
Percentage Of Interest In Investments	30.00%
Matterhorn [Member]
Summary Of Significant Accounting Policies [Line Items]
Total Investments	$ 90	90
Percentage Of Interest In Investments	12.50%
Fervo [Member]
Summary Of Significant Accounting Policies [Line Items]
Total Investments	$ 57
Percentage Of Interest In Investments	12.00%
Other [Member]
Summary Of Significant Accounting Policies [Line Items]
Total Investments	$ 49	$ 49