Debt (Tables)

9 Months Ended

Sep. 30, 2012

Debt Instruments [Abstract]

Debt

			September 30, 2012		December 31, 2011
			(In millions)
Senior unsecured debt:
	Revolving credit facility ― LIBOR based loans		$	145	$	85
	Money market lines of credit(1)			—		1
		Total credit arrangements		145		86
	5¾% Senior Notes due 2022			750		750
	5⅝% Senior Notes due 2024			1,000		—
		Total senior unsecured debt		1,895		836
6⅝% Senior Subordinated Notes due 2014				—		325
6⅝% Senior Subordinated Notes due 2016				—		550
7⅛% Senior Subordinated Notes due 2018				600		600
6⅞% Senior Subordinated Notes due 2020				695		695
		Total long-term debt	$	3,190	$	3,006
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(1)		Because capacity under our credit facility was available to repay borrowings under our money market lines of credit as of the indicated dates, amounts outstanding under these obligations, if any, are classified as long-term.