Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Earnings per common share:
Net income attributable to Valero stockholders	$ 6,828	$ 1,095	$ 11,811	$ 1,214
Less: Income allocated to participating securities	19	3	33	3
Net income available to common stockholders	$ 6,809	$ 1,092	$ 11,778	$ 1,211
Weighted-average common shares outstanding (in shares)	285	309	292	311
Earnings per common share (in dollars per share)	$ 23.90	$ 3.54	$ 40.30	$ 3.89
Earnings per common share – assuming dilution:
Net income attributable to Valero stockholders	$ 6,828	$ 1,095	$ 11,811	$ 1,214
Less: Income allocated to participating securities	19	3	33	3
Net income available to common stockholders	$ 6,809	$ 1,092	$ 11,778	$ 1,211
Weighted-average common shares outstanding (in shares)	285	309	292	311
Effect of dilutive securities (in shares)	0	0	0	1
Weighted-average common shares outstanding – assuming dilution (in shares)	285	309	292	312
Earnings per common share – assuming dilution (in dollars per share)	$ 23.89	$ 3.53	$ 40.29	$ 3.89