Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings per common share:
Net income attributable to Valero stockholders	$ 2,622	$ 2,817	$ 7,633	$ 8,415
Less: Income allocated to participating securities	8	11	24	31
Net income available to common stockholders	$ 2,614	$ 2,806	$ 7,609	$ 8,384
Weighted-average common shares outstanding (in shares)	349	390	359	400
Earnings per common share (in dollars per share)	$ 7.49	$ 7.20	$ 21.22	$ 20.94
Earnings per common share – assuming dilution:
Net income attributable to Valero stockholders	$ 2,622	$ 2,817	$ 7,633	$ 8,415
Less: Income allocated to participating securities	8	11	24	31
Net income available to common stockholders	$ 2,614	$ 2,806	$ 7,609	$ 8,384
Weighted-average common shares outstanding (in shares)	349	390	359	400
Effect of dilutive securities (in shares)	0	0	0	1
Weighted-average common shares outstanding – assuming dilution (in shares)	349	390	359	401
Earnings per common share – assuming dilution (in dollars per share)	$ 7.49	$ 7.19	$ 21.21	$ 20.93