Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ 652	$ (432)
Other comprehensive income (loss):
Foreign currency translation adjustment	(204)	123
Pension and other postretirement benefits:
Gain arising during the period related to remeasurement due to plan amendments	328	0
(Gain) loss reclassified into income related to:
Net actuarial loss	14	8
Prior service credit	(6)	(4)
Net gain on pension and other postretirement benefits	336	4
Derivative instruments designated and qualifying as cash flow hedges:
Net gain arising during the period	1	47
Net gain reclassified into income	(3)	(48)
Net loss on cash flow hedges	(2)	(1)
Other comprehensive income, before income tax expense	130	126
Income tax expense related to items of other comprehensive income	117	1
Other comprehensive income	13	125
Comprehensive income (loss)	665	(307)
Less: Comprehensive loss attributable to noncontrolling interests	(2)	0
Comprehensive income (loss) attributable to Valero Energy Corporation stockholders	$ 667	$ (307)