Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings (loss) per common share:
Net income (loss) attributable to Valero stockholders	$ (595)	$ 1,245
Less: Income allocated to participating securities	1	3
Net income (loss) available to common stockholders	$ (596)	$ 1,242
Weighted-average common shares outstanding (in shares)	314	331
Earnings (loss) per common share (in dollars per share)	$ (1.90)	$ 3.75
Earnings (loss) per common share – assuming dilution:
Net income (loss) attributable to Valero stockholders	$ (595)	$ 1,245
Less: Income allocated to participating securities	1	3
Net income (loss) available to common stockholders	$ (596)	$ 1,242
Weighted-average common shares outstanding (in shares)	314	331
Effect of dilutive securities (in shares)	0	0
Weighted-average common shares outstanding – assuming dilution (in shares)	314	331
Earnings (loss) per common share – assuming dilution (in dollars per share)	$ (1.90)	$ 3.75