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Segment Information (Income from Equity Method Investments) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024		Jun. 30, 2025	Jun. 30, 2024
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Income from equity method investments	$ 212	$ 373		$ 442	$ 577
Operating Segments
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Income from equity method investments	212	222		442	426
Operating Segments | Refining & Marketing
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Income from equity method investments	3	7		8	17
Operating Segments | Midstream
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Income from equity method investments	191	203		400	384
Operating Segments | Renewable Diesel
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Income from equity method investments	18	12		34	25
Corporate
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]
Income from equity method investments	$ 0	$ 151	[1]	$ 0	$ 151	[1]
[1] Gain from the Whistler Joint Venture Transaction. See Note 4 for additional information.

X

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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