Accrued Expenses and Other Long-Term Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Accrued Expenses
Operating lease liabilities (see Note 5)	$ 419	$ 378
Defined benefit plan liabilities (see Note 13)	49	73
Environmental liabilities	32	45
Wage and other employee-related liabilities	469	307
Accrued interest expense	76	68
Contract liabilities from contracts with customers (see Note 17)	60	82
Blending program obligations (see Note 19)	187	78
Asset retirement obligations (see Note 2)	0	2
Other accrued liabilities	111	97
Accrued expenses	1,403	1,130
Other Long-Term Liabilities
Operating lease liabilities (see Note 5)	665	699
Liability for unrecognized tax benefits	441	429
Defined benefit plan liabilities (see Note 13)	423	423
Environmental liabilities	243	261
Wage and other employee-related liabilities	104	102
Asset retirement obligations (see Note 2)	382	36
Other accrued liabilities	200	190
Other long-term liabilities	$ 2,458	$ 2,140