Price Risk Management Activities, Hedging Instruments by Consolidated Balance Sheet Location (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Derivatives Designated as Hedging Instruments [Member] \| Commodity Contracts [Member] \| Receivable, Net [Member]
Fair Values of Derivative Instruments
Derivative asset, subject to netting	$ 14	$ 12
Derivative liability, subject to netting	9	13
Derivatives Not Designated as Hedging Instruments [Member]
Fair Values of Derivative Instruments
Derivative asset, total	493	398
Derivative liability, total	475	438
Derivatives Not Designated as Hedging Instruments [Member] \| Commodity Contracts [Member] \| Receivable, Net [Member]
Fair Values of Derivative Instruments
Derivative asset, subject to netting	492	390
Derivative liability, subject to netting	463	435
Derivatives Not Designated as Hedging Instruments [Member] \| Physical Purchase Contracts [Member] \| Inventories [Member]
Fair Values of Derivative Instruments
Derivative asset, not subject to netting	1	2
Derivative liability, not subject to netting	12	3
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	0	6
Derivative liability, not subject to netting	$ 0	$ 0

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