Segment Information (Equity Method Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from equity method investments	$ 1,048		$ 742	$ 655
Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from equity method investments	897		742	655
Operating Segments | Refining & Marketing
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from equity method investments	57		66	51
Operating Segments | Midstream
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from equity method investments	770		735	624
Operating Segments | Renewable Diesel
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from equity method investments	70		(59)	(20)
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Income from equity method investments	$ 151	[1]	$ 0	$ 0

[1] Represents the gain from the Whistler Joint Venture Transaction. See Note 14 for additional information.