Revenues - Schedule of Disaggregated Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Sales and other revenues	$ 10,390	$ 6,784	$ 17,513	$ 13,154
Total refined product revenues
Disaggregation of Revenue [Line Items]
Sales and other revenues	9,784	6,320	16,268	12,197
Total refined product revenues \| Mid-Continent
Disaggregation of Revenue [Line Items]
Sales and other revenues	3,364	2,221	5,654	4,346
Total refined product revenues \| Rocky Mountains
Disaggregation of Revenue [Line Items]
Sales and other revenues	2,324	1,370	3,729	2,597
Total refined product revenues \| Northwest
Disaggregation of Revenue [Line Items]
Sales and other revenues	1,893	1,290	3,177	2,441
Total refined product revenues \| Southwest
Disaggregation of Revenue [Line Items]
Sales and other revenues	1,416	919	2,402	1,773
Total refined product revenues \| Northeast
Disaggregation of Revenue [Line Items]
Sales and other revenues	309	200	509	432
Total refined product revenues \| Canada
Disaggregation of Revenue [Line Items]
Sales and other revenues	391	251	638	468
Total refined product revenues \| Other
Disaggregation of Revenue [Line Items]
Sales and other revenues	87	69	159	140
Transportation fuels
Disaggregation of Revenue [Line Items]
Sales and other revenues	8,318	5,344	13,823	10,305
Lubricants and specialty products
Disaggregation of Revenue [Line Items]
Sales and other revenues	879	583	1,465	1,180
Asphalt, fuel oil and other products
Disaggregation of Revenue [Line Items]
Sales and other revenues	587	393	980	712
Excess crude oil revenues
Disaggregation of Revenue [Line Items]
Sales and other revenues	310	345	739	728
Transportation and logistics services
Disaggregation of Revenue [Line Items]
Sales and other revenues	32	29	63	58
Other revenues
Disaggregation of Revenue [Line Items]
Sales and other revenues	264	$ 90	443	$ 171
RIN
Disaggregation of Revenue [Line Items]
Sales and other revenues	$ 163		$ 239