Derivative Instruments and Hedging Activities (Details) - Purchase crude oil from Strategic Petroleum Reserve $ in Millions	Sep. 30, 2026 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Liability	$ 1,900
Derivative [Line Items]
Derivative Liability	1,900
Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilitiesNoncurrent
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Liability	1,300
Derivative [Line Items]
Derivative Liability	1,300
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Liability	590
Derivative [Line Items]
Derivative Liability	$ 590

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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+ Details