Debt and Capital Lease Obligations (Tables)

3 Months Ended

Mar. 31, 2018

Debt and Capital Lease Obligations [Abstract]

Summary of credit facilities

We had outstanding borrowings, letters of credit issued, and availability under our credit facilities as follows (amounts in millions and currency in U.S. dollars, except as noted):

				March 31, 2018
	Facility Amount		Maturity Date	Outstanding Borrowings		Letters of Credit Issued		Availability
Committed facilities:
Valero Revolver	$	3,000	November 2020	$	—	$	138	$	2,862
VLP Revolver	750		November 2020	—		—		750
Canadian Revolver	C$	75	November 2018	C$	—	C$	6	C$	69
Accounts receivable sales facility	1,300		July 2018	100		n/a		1,200
Letter of credit facility	100		November 2018	n/a		—		100
Uncommitted facilities:
Letter of credit facilities	n/a		n/a	n/a		273		n/a

Interest and debt expense, net of capitalized interest

Interest and debt expense, net of capitalized interest is comprised of the following (in millions):

	Three Months Ended March 31,
	2018		2017
Interest and debt expense	$	139	$	134
Less capitalized interest	18		13
Interest and debt expense, net of capitalized interest	$	121	$	121