Fair Value Measurement - Schedule of Net Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Carrying Amount
Financial Assets [Abstract]
Investments in debt securities	$ 1,268	$ 1,222
Financial Liabilities [Abstract]
Total debt, excluding finance leases	15,316	15,323
Carrying Amount | Commodity Contract
Financial Assets [Abstract]
Commodity derivatives	492	824
Financial Liabilities [Abstract]
Commodity derivatives	406	782
Estimate of Fair Value Measurement
Financial Assets [Abstract]
Investments in debt securities	1,268	1,222
Financial Liabilities [Abstract]
Total debt, excluding finance leases	15,914	15,545
Estimate of Fair Value Measurement | Commodity Contract
Financial Assets [Abstract]
Commodity derivatives	492	824
Financial Liabilities [Abstract]
Commodity derivatives	$ 406	$ 782