Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 673	$ 1,203	$ 1,071	$ 2,044
Other comprehensive income (loss):
Foreign currency translation adjustment	143	(278)	175	(166)
(Gain) loss reclassified into income related to:
Prior service credit	(5)	(5)	(15)	(15)
Net actuarial loss	8	3	25	10
Net gain (loss) on pension and other postretirement benefits	3	(2)	10	(5)
Derivative instruments designated and qualifying as cash flow hedges:
Net gain arising during the period	27	20	43	20
Net gain reclassified into income	(45)	0	(81)	0
Net gain (loss) on cash flow hedges	(18)	20	(38)	20
Other comprehensive income (loss), before income tax expense (benefit)	128	(260)	147	(151)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(5)	6	(9)	5
Other comprehensive income (loss)	133	(266)	156	(156)
Comprehensive income	806	937	1,227	1,888
Less: Comprehensive loss attributable to noncontrolling interest	(1)	0	(2)	(1)
Comprehensive income attributable to Valero Energy Corporation stockholders	$ 807	$ 937	$ 1,229	$ 1,889