Stockholders' Equity (Details) (USD $) In Millions, except Share data	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Common Shares [Member]	Mar. 31, 2011 Common Shares [Member]	Jun. 30, 2011 Additional Paid-In-Capital [Member]	Jun. 30, 2011 Additional Paid-In-Capital [Member]	Jun. 30, 2011 Accumulated Other Comprehensive (Loss) Income [Member]	Jun. 30, 2011 Accumulated Other Comprehensive (Loss) Income [Member]	Jun. 30, 2011 Retained Earnings [Member]	Jun. 30, 2011 Retained Earnings [Member]	Jun. 30, 2011 Equity Attributable to Noncontrolling Interests [Member]	Jun. 30, 2011 Equity Attributable to Noncontrolling Interests [Member]
Beginning balance	$ 2,620		$ 2,486		$ 2	$ 2	$ 861	$ 805	$ (232)	$ (283)	$ 1,975	$ 1,947	$ 14	$ 15
Ending balance	2,803		2,803		2	2	901	901	(207)	(207)	2,106	2,106	1	1
Ending balance, Shares					195,000,000	195,000,000
Beginning balance, Shares					193,000,000	195,000,000
Net income (loss)	131	114	157	142							131	159		(2)
Equity compensation activity and other	40		96				40	96
Equity compensation activity and other, Shares					2,000,000
Dividends			(1)											(1)
Other comprehensive income (loss)	25	(78)	78	(102)					25	76				2
Sale of controlling interests	$ (13)		$ (13)										$ (13)	$ (13)
Stockholders' Equity (Textuals) (Abstract)
Common stock issued as Stock Option Exercises	423,000		1,751,000
Shares repurchased	0		0
Remaining capacity for authorized repurchase shares	0		0