Debt (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Summary of credit facilities

We had outstanding borrowings, letters of credit issued, and availability under our credit facilities as follows (in millions):

				March 31, 2016
	Facility Amount		Maturity Date	Outstanding Borrowings		Letters of Credit		Availability
Committed facilities:
Revolver	$	3,000	November 2020	$	—	$	53	$	2,947
VLP Revolver	$	750	November 2020	$	175	$	—	$	575
Canadian Revolver	C$	50	November 2016	C$	—	C$	10	C$	40
Accounts receivable sales facility	$	1,400	July 2016	$	100	$	—	$	974
Letter of credit facilities	$	275	June 2016 and November 2016	$	—	$	16	$	259
Uncommitted facilities:
Letter of credit facilities	$	700	N/A	$	—	$	61	$	639