Price Risk Management Activities, Hedging Instruments by Consolidated Balance Sheet Location (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivatives Designated as Hedging Instruments [Member] \| Commodity Contracts [Member] \| Receivable, Net [Member]
Fair Values of Derivative Instruments
Derivative asset, subject to netting	$ 10	$ 61
Derivative liability, subject to netting	19	44
Derivatives Not Designated as Hedging Instruments [Member]
Fair Values of Derivative Instruments
Derivative asset, total	903	773
Derivative liability, total	1,143	667
Derivatives Not Designated as Hedging Instruments [Member] \| Commodity Contracts [Member] \| Receivable, Net [Member]
Fair Values of Derivative Instruments
Derivative asset, subject to netting	899	769
Derivative liability, subject to netting	1,129	661
Derivatives Not Designated as Hedging Instruments [Member] \| Physical Purchase Contracts [Member] \| Inventories [Member]
Fair Values of Derivative Instruments
Derivative asset, not subject to netting	0	4
Derivative liability, not subject to netting	14	4
Derivatives Not Designated as Hedging Instruments [Member] \| Foreign Currency Contracts [Member] \| Receivable, Net [Member]
Fair Values of Derivative Instruments
Derivative asset, not subject to netting	4	0
Derivative liability, not subject to netting	0	0
Derivatives Not Designated as Hedging Instruments [Member] \| Foreign Currency Contracts [Member] \| Accrued Expenses [Member]
Fair Values of Derivative Instruments
Derivative asset, not subject to netting	0	0
Derivative liability, not subject to netting	$ 0	$ 2

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