Consolidated Statements of Changes in Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Total Stockholders Equity	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Non-Redeemable Noncontrolling Interests in Subsidiaries
Balance at beginning of period at Dec. 31, 2010		$ 916	$ 2	$ 281	$ 638	$ (38)	$ 33
Balance (shares) at Dec. 31, 2010			160.0
Comprehensive income (loss):
Net income (loss)		(189)			(190)		1
Other comprehensive (loss) income	21	21				19	2
Total comprehensive income (loss)		(168)			(190)	19	3
Employee stock purchase and stock compensation plans		53		53
Employee stock purchase and stock compensation plans (in shares)			1
Repruchase of company common stock (in shares)			(3)
Repurchase of Company common stock		(70)		(70)
Sale of redeemable noncontrolling interests		23		23
Dividend distribution to minority shareholder		(1)					(1)
Balance at end of period at Dec. 31, 2011		753	2	287	448	(19)	35
Balance (shares) at Dec. 31, 2011			158.0
Comprehensive income (loss):
Net income (loss)		481			481		0
Other comprehensive (loss) income	(22)	(22)				(18)	(4)
Total comprehensive income (loss)		459			481	(18)	(4)
Employee stock purchase and stock compensation plans		71		71
Employee stock purchase and stock compensation plans (in shares)			5
Dividend distribution to minority shareholder		(1)					(1)
Balance at end of period at Dec. 31, 2012	1,282	1,282	2	358	929	(37)	30
Balance (shares) at Dec. 31, 2012	162.8		163.0
Comprehensive income (loss):
Net income (loss)		446			443		3
Other comprehensive (loss) income	(8)	(6)				(1)	(5)
Total comprehensive income (loss)		440			443	(1)	(2)
Employee stock purchase and stock compensation plans		83		83
Employee stock purchase and stock compensation plans (in shares)			4
Purchase of subsidiary shares from minority shareholder		(28)		(8)			(20)
Acquisition of noncontrolling interest		9					9
Dividend distribution to minority shareholder		(3)					(3)
Balance at end of period at Dec. 31, 2013	$ 1,783	$ 1,783	$ 2	$ 433	$ 1,372	$ (38)	$ 14
Balance (shares) at Dec. 31, 2013	166.6		167.0