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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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