Description of Business, Basis of Presentation, and Significant Accounting Policies (Details)	6 Months Ended
	Jun. 30, 2018 refinery
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Payment typically due, period post receipt of billing	10 days
Related Party Transaction [Line Items]
Limited partnership formation date	Jul. 24, 2013
Majority Shareholder [Member]
Related Party Transaction [Line Items]
Number of Valero owned refineries	10