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Fair Value Measurement - Schedule of Fair Value Hierarchy for Gross Financial Assets and Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Commodity derivatives | $ 662 | $ 2,037
Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments in debt securities | 1,354 | 1,222
Commodity derivatives | 662 | 2,037
Total assets | 2,016 | 3,259
Commodity derivatives | 603 | 2,010
Total liabilities | 603 | 2,010
Fair Value, Measurements, Recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments in debt securities | 276 | 178
Commodity derivatives | 361 | 958
Total assets | 637 | 1,136
Commodity derivatives | 376 | 906
Total liabilities | 376 | 906
Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments in debt securities | 1,078 | 1,044
Commodity derivatives | 231 | 951
Total assets | 1,309 | 1,995
Commodity derivatives | 203 | 843
Total liabilities | 203 | 843
Fair Value, Measurements, Recurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments in debt securities | 0 | 0
Commodity derivatives | 70 | 128
Total assets | 70 | 128
Commodity derivatives | 24 | 261
Total liabilities | $ 24 | $ 261

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