Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions	Total	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Common Stock [Member]	Accumulated Deficit	AOCI Attributable to Parent [Member]
Shares, Issued			(56.3)	(137.1)
Balance	$ 573,000,000	$ 6,820,000,000	$ (5,002,000,000)	$ 1,000,000	$ (1,222,000,000)	$ (24,000,000)
Comprehensive income (loss):
Net income	165,000,000
Other comprehensive income (loss)	(103,000,000)					(103,000,000)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	62,000,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			0.5
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	17,000,000	(31,000,000)	$ 48,000,000
Number of Options - Exercised			0.2
Stock Issued During Period, Value, Stock Options Exercised	(2,000,000)	(17,000,000)	$ (19,000,000)
Stock Issued During Period, Value, Employee Stock Purchase Plan	0	(1,000,000)	$ (1,000,000)
Treasury Stock, Shares, Acquired			5.9
Treasury Stock, Value, Acquired, Cost Method	(200,000,000)		$ (200,000,000)
Cumulative Effect of Accounting	$ (40,000,000)				(34,000,000)	(6,000,000)
Net Income (Loss) Attributable to Parent					165,000,000
Treasury Stock, Shares, Acquired	13.0
Treasury Stock, Value, Acquired, Cost Method	$ (375,000,000)
Shares, Issued			(61.5)	(137.1)
Balance	414,000,000	6,771,000,000	$ (5,134,000,000)	$ 1,000,000	(1,091,000,000)	(133,000,000)
Net income	302,000,000				302,000,000
Other comprehensive income (loss)	(25,000,000)					(25,000,000)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	277,000,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			0.4
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	22,000,000	(24,000,000)	$ 46,000,000
Number of Options - Exercised			0.1
Stock Issued During Period, Value, Stock Options Exercised	0	(5,000,000)	$ (5,000,000)
Stock Issued During Period, Value, Employee Stock Purchase Plan	0	(1,000,000)	$ (1,000,000)
Treasury Stock, Shares, Acquired			2.2
Treasury Stock, Value, Acquired, Cost Method	(62,000,000)		$ (62,000,000)
Cumulative Effect of Accounting	5,000,000				4,000,000	1,000,000
Shares, Issued			(63.2)	(137.1)
Balance	656,000,000	6,741,000,000	$ (5,144,000,000)	$ 1,000,000	(785,000,000)	(157,000,000)
Net income	(684,000,000)
Other comprehensive income (loss)	(30,000,000)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(714,000,000)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			0.5
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	4,000,000	(50,000,000)	$ 54,000,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	0	(1,000,000)	$ (1,000,000)
Treasury Stock, Shares, Acquired			5.0
Treasury Stock, Value, Acquired, Cost Method	(113,000,000)		$ (113,000,000)
Cumulative Effect of Accounting	(1,000,000)				(1,000,000)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	(2,000,000)	(2,000,000)
Stock Issued During Period, Value, Treasury Stock Reissued	15,000,000	(20,000,000)	$ 35,000,000
Stock Issued During Period, Shares, Treasury Stock Reissued			0.4
Shares, Issued			(67.3)	(137.1)
Balance	$ (155,000,000)	$ 6,668,000,000	$ (5,167,000,000)	$ 1,000,000	$ (1,470,000,000)	$ (187,000,000)