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Fair Value Measurement - Net Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Carrying Amount |  |
Financial assets |  |
Commodity derivatives | $ 345 | $ 824
Investments in debt securities | 1,424 | 1,222
Financial liabilities |  |
Total debt, excluding finance leases | 17,808 | 15,323
Carrying Amount | Commodity |  |
Financial liabilities |  |
Commodity derivatives | 225 | 782
Fair Value |  |
Financial assets |  |
Commodity derivatives | 345 | 824
Investments in debt securities | 1,424 | 1,222
Financial liabilities |  |
Total debt, excluding finance leases | 18,621 | 15,545
Fair Value | Commodity |  |
Financial liabilities |  |
Commodity derivatives | $ 225 | $ 782

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