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Fair Value Measurement - Schedule of Net Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Carrying Amount
Financial Assets [Abstract]
Investments in debt securities	$ 1,479	$ 1,424
Financial Liabilities [Abstract]
Total debt, excluding finance leases	17,318	17,808
Carrying Amount | Commodity Contract
Financial Assets [Abstract]
Commodity derivatives	266	345
Financial Liabilities [Abstract]
Commodity derivatives	178	225
Estimate of Fair Value Measurement
Financial Assets [Abstract]
Investments in debt securities	1,479	1,424
Financial Liabilities [Abstract]
Total debt, excluding finance leases	17,321	18,621
Estimate of Fair Value Measurement | Commodity Contract
Financial Assets [Abstract]
Commodity derivatives	266	345
Financial Liabilities [Abstract]
Commodity derivatives	$ 178	$ 225

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