Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings per common share:
Net income attributable to Valero stockholders	$ 714	$ 880	$ 119	$ 2,125
Less: Income allocated to participating securities	2	3	2	6
Net income available to common stockholders	$ 712	$ 877	$ 117	$ 2,119
Weighted-average common shares outstanding (in shares)	312	324	313	327
Earnings per common share (in dollars per share)	$ 2.28	$ 2.71	$ 0.37	$ 6.47
Earnings per common share – assuming dilution:
Net income attributable to Valero stockholders	$ 714	$ 880	$ 119	$ 2,125
Less: Income allocated to participating securities	2	3	2	6
Net income available to common stockholders	$ 712	$ 877	$ 117	$ 2,119
Weighted-average common shares outstanding (in shares)	312	324	313	327
Effect of dilutive securities (in shares)	0	0	0	0
Weighted-average common shares outstanding – assuming dilution (in shares)	312	324	313	327
Earnings per common share – assuming dilution (in dollars per share)	$ 2.28	$ 2.71	$ 0.37	$ 6.47