Price Risk Management Activities, Hedging Instruments by Consolidated Balance Sheet Location (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivatives Designated as Hedging Instruments [Member] | Commodity Contracts [Member] | Trade Accounts Receivable [Member]
Asset Derivatives
Derivative assets, subject to netting, gross	$ 12	$ 141
Liability Derivatives
Derivative liabilities, subject to netting, gross	13	34
Derivatives Not Designated as Hedging Instruments [Member]
Asset Derivatives
Total	398	662
Liability Derivatives
Total	438	622
Derivatives Not Designated as Hedging Instruments [Member] | Commodity Contracts [Member] | Trade Accounts Receivable [Member]
Asset Derivatives
Derivative assets, subject to netting, gross	390	662
Liability Derivatives
Derivative liabilities, subject to netting, gross	435	609
Derivatives Not Designated as Hedging Instruments [Member] | Physical Purchase Contracts [Member] | Inventories [Member]
Asset Derivatives
Derivative assets, not subject to netting	2	0
Liability Derivatives
Derivative liabilities, not subject to netting	3	6
Derivatives Not Designated as Hedging Instruments [Member] | Foreign Currency Contracts [Member] | Trade Accounts Receivable [Member]
Asset Derivatives
Derivative assets, not subject to netting	6	0
Liability Derivatives
Derivative liabilities, not subject to netting	0	0
Derivatives Not Designated as Hedging Instruments [Member] | Foreign Currency Contracts [Member] | Accrued Expenses [Member]
Asset Derivatives
Derivative assets, not subject to netting	0	0
Liability Derivatives
Derivative liabilities, not subject to netting	$ 0	$ 7