Financial Instruments - Unsettled Derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 136	$ 80
Derivative Liability, Fair Value, Gross Liability	19	24
Derivative Asset	136	80
Derivative Liability	19	24
Trade accounts receivable [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	122	76
Derivative Liability	2	2
Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Asset	0	0
Derivative Liability	17	22
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	14	4
Derivative Liability	0	0
Commodity Contract
Derivatives, Fair Value [Line Items]
Derivative Asset	14	4
Derivative Liability	3	1
Embedded Derivative Financial Instruments
Derivatives, Fair Value [Line Items]
Derivative Asset	122	76
Derivative Liability	16	23
Designated as Hedging Instrument [Member] | Commodity Contract
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	13	4
Not Designated as Hedging Instrument | Embedded Derivative Financial Instruments
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	122	76
Derivative Liability, Fair Value, Gross Liability	16	23
Commodity Contract | Not Designated as Hedging Instrument | Forward Contracts
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	0
Derivative Liability, Fair Value, Gross Liability	$ 3	$ 1