Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues	[1]	$ 64,912	$ 108,324	$ 117,033
Cost of sales:
Cost of materials and other		58,933	96,476	104,732
Lower of cost or market (LCM) inventory valuation adjustment		(19)	0	0
Operating expenses (excluding depreciation and amortization expense reflected below)		4,435	4,868	4,690
Depreciation and amortization expense		2,303	2,202	2,017
Total cost of sales		65,652	103,546	111,439
Other operating expenses		35	21	45
General and administrative expenses (excluding depreciation and amortization expense reflected below)		756	868	925
Depreciation and amortization expense		48	53	52
Operating income (loss)		(1,579)	3,836	4,572
Other income, net		132	104	130
Interest and debt expense, net of capitalized interest		(563)	(454)	(470)
Income (loss) before income tax expense (benefit)		(2,010)	3,486	4,232
Income tax expense (benefit)		(903)	702	879
Net income (loss)		(1,107)	2,784	3,353
Less: Net income attributable to noncontrolling interests		314	362	231
Net income (loss) attributable to Valero Energy Corporation stockholders		$ (1,421)	$ 2,422	$ 3,122
Earnings (loss) per common share (in usd per share)		$ (3.50)	$ 5.84	$ 7.30
Weighted-average common shares outstanding (shares)		407	413	426
Earnings (loss) per common share – assuming dilution (in usd per share)		$ (3.50)	$ 5.84	$ 7.29
Weighted-average common shares outstanding – assuming dilution (shares)		407	414	428
Supplemental information:
Includes excise taxes on sales by certain of our international operations		$ 4,797	$ 5,595	$ 5,626

[1] Includes excise taxes on sales by certain of our international operations of $4,797 million, $5,595 million, and $5,626 million for the years ended December 31, 2020, 2019, and 2018.