Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Common Stock [Member]	Accumulated Deficit	AOCI Attributable to Parent [Member]
Shares, Issued			(51.1)	(137.1)
Balance	$ 221	$ 6,918	$ (4,905)	$ 1	$ (1,639)	$ (154)
Cumulative Effect of New Accounting Principle in Period of Adoption	56				56
Comprehensive income (loss):
Net income	361				361
Other comprehensive income (loss)	130					130
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	491
Stockholders' Equity Attributable to Noncontrolling Interest	1	1
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			0.4
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	4	(50)	$ 54
Number of Options - Exercised			0.5
Stock Issued During Period, Value, Stock Options Exercised	0	(48)	$ (48)
Stock Issued During Period, Value, Employee Stock Purchase Plan	0	(1)	$ (1)
Treasury Stock, Shares, Acquired			6.1
Treasury Stock, Value, Acquired, Cost Method	$ (200)		$ (200)
Treasury Stock, Shares, Acquired	14.0
Treasury Stock, Value, Acquired, Cost Method	$ (462)
Shares, Issued			(56.3)	(137.1)
Balance	573	6,820	$ (5,002)	$ 1	(1,222)	(24)
Cumulative Effect of New Accounting Principle in Period of Adoption	(40)				(34)	(6)
Net income	165				165
Other comprehensive income (loss)	(103)					(103)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	62
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	(31)	$ 48
Number of Options - Exercised			0.2
Stock Issued During Period, Value, Stock Options Exercised	(2)	(17)	$ (19)
Stock Issued During Period, Value, Employee Stock Purchase Plan	0	(1)	$ (1)
Treasury Stock, Shares, Acquired			5.9
Treasury Stock, Value, Acquired, Cost Method	(200)		$ (200)
Shares, Issued			(61.5)	(137.1)
Balance	414	6,771	$ (5,134)	$ 1	(1,091)	(133)
Cumulative Effect of New Accounting Principle in Period of Adoption	5				4	1
Net income	302
Other comprehensive income (loss)	(25)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	277
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	(24)	$ 46
Number of Options - Exercised			0.1
Stock Issued During Period, Value, Stock Options Exercised	0	(5)	$ (5)
Stock Issued During Period, Value, Employee Stock Purchase Plan	0	(1)	$ (1)
Treasury Stock, Shares, Acquired			2.2
Treasury Stock, Value, Acquired, Cost Method	(62)		$ (62)
Shares, Issued			(63.2)	(137.1)
Balance	$ 656	$ 6,741	$ (5,144)	$ 1	$ (785)	$ (157)