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Summary of Significant Accounting Policies - (Schedule of Components of Investments) (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 718 | $ 666
Catalyst [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 282 | 311
Percentage Of Interest In Investments | 50.00% |
Water JV [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 216 | 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 | $ 77 | 0
Percentage Of Interest In Investments | 14.00% |
Other [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 53 | $ 49

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