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Fair Value Measurement - Net Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Carrying Amount |  |
Financial assets |  |
Commodity derivatives | $ 210 | $ 345
Investments in debt securities | 1,551 | 1,424
Financial liabilities |  |
Total debt, excluding finance leases | 23,384 | 17,808
Carrying Amount | Commodity |  |
Financial liabilities |  |
Commodity derivatives | 129 | 225
Fair Value |  |
Financial assets |  |
Commodity derivatives | 210 | 345
Investments in debt securities | 1,551 | 1,424
Financial liabilities |  |
Total debt, excluding finance leases | 22,997 | 18,621
Fair Value | Commodity |  |
Financial liabilities |  |
Commodity derivatives | $ 129 | $ 225

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