Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 22, 2022
Cover [Abstract]
Document type	10-Q
Document quarterly report	true
Document period end date	Jun. 30, 2022
Document transition report	false
Entity file number	001-13175
Entity registrant name	VALERO ENERGY CORP/TX
Entity incorporation, state or country code	DE
Entity tax identification number	74-1828067
Entity address, address line one	One Valero Way
Entity address, city or town	San Antonio
Entity address, state or province	TX
Entity address, postal zip code	78249
City area code	210
Local phone number	345-2000
Title of 12(b) security	Common stock
Trading symbol	VLO
Security exchange name	NYSE
Entity current reporting status	Yes
Entity interactive data current	Yes
Entity filer category	Large Accelerated Filer
Entity small business	false
Entity emerging growth company	false
Entity shell company	false
Entity common stock, shares outstanding		393,970,342
Entity central index key	0001035002
Amendment flag	false
Document fiscal year focus	2022
Document fiscal period focus	Q2
Current fiscal year end date	--12-31