Supplemental Cash Flows Information (Tables)

9 Months Ended

Sep. 30, 2012

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flows Information Schedule (Table)

		Three Months Ended September 30,				Nine Months Ended September 30,
		2012		2011		2012		2011
			(In millions)
Non-cash items excluded from the statement of cash flows:
	Increase in accrued capital expenditures	$	(35)	$	(38)	$	(101)	$	(48)
	Increase in asset retirement costs		(9)		(2)		(14)		(10)