Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings per common share:
Net income attributable to Valero stockholders	$ 1,095	$ 364	$ 1,214	$ 2,489
Less: Income allocated to participating securities	3	1	3	7
Net income available to common stockholders	$ 1,092	$ 363	$ 1,211	$ 2,482
Weighted-average common shares outstanding (in shares)	309	318	311	324
Earnings per common share (in dollars per share)	$ 3.54	$ 1.14	$ 3.89	$ 7.66
Earnings per common share – assuming dilution:
Net income attributable to Valero stockholders	$ 1,095	$ 364	$ 1,214	$ 2,489
Less: Income allocated to participating securities	3	1	3	7
Net income available to common stockholders	$ 1,092	$ 363	$ 1,211	$ 2,482
Weighted-average common shares outstanding (in shares)	309	318	311	324
Effect of dilutive securities (in shares)	0	0	1	0
Weighted-average common shares outstanding – assuming dilution (in shares)	309	318	312	324
Earnings per common share – assuming dilution (in dollars per share)	$ 3.53	$ 1.14	$ 3.89	$ 7.66