Debt (Tables)

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Outstanding letters of credit under committed lines of credit

We had outstanding letters of credit under our committed credit facilities as follows (in millions):

				Amounts Outstanding
	Borrowing Capacity		Expiration	September 30, 2014		December 31, 2013
Letter of credit facilities	$	550	June 2015	$	86	$	278
Revolver	$	3,000	November 2018	$	54	$	59
VLP Revolver	$	300	December 2018	$	—	$	—
Canadian Revolver	C$	50	November 2015	C$	10	C$	10