Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating revenues	[1]	$ 93,980	$ 75,659	$ 87,804
Cost of sales:
Cost of materials and other		83,037	65,962	73,861
Operating expenses (excluding depreciation and amortization expense reflected below)		4,462	4,207	4,243
Depreciation and amortization expense		1,934	1,846	1,795
Lower of cost or market inventory valuation adjustment		0	(747)	790
Total cost of sales		89,433	71,268	80,689
Other operating expenses		61	0	0
General and administrative expenses (excluding depreciation and amortization expense reflected below)		835	715	710
Depreciation and amortization expense		52	48	47
Asset impairment loss		0	56	0
Operating income		3,599	3,572	6,358
Other income, net		76	56	46
Interest and debt expense, net of capitalized interest		(468)	(446)	(433)
Income before income tax expense (benefit)		3,207	3,182	5,971
Income tax expense (benefit)		(949)	765	1,870
Net income		4,156	2,417	4,101
Less: Net income attributable to noncontrolling interests		91	128	111
Net income attributable to Valero Energy Corporation stockholders		$ 4,065	$ 2,289	$ 3,990
Earnings per common share
Earnings per common share (in usd per share)		$ 9.17	$ 4.94	$ 8.00
Weighted-average common shares outstanding (in millions) (shares)		442	461	497
Earnings per common share – assuming dilution
Earnings per common share - assuming dilution (in usd per share)		$ 9.16	$ 4.94	$ 7.99
Weighted-average common shares outstanding – assuming dilution (in millions) (shares)		444	464	500
Dividends per common share (in dollars per share)		$ 2.8	$ 2.4	$ 1.7

[1] Includes excise taxes on sales by certain of our international operations of $5,573 million, $5,493 million, and $5,980 million for the years ended December 31, 2017, 2016, and 2015.