Income Taxes (Provision (Benefit) For Income Taxes By Taxing Jurisdiction) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Current tax provision (benefit), U.S. federal	$ 14	$ (78)	$ (249)
Current tax provision (benefit), U.S. state and local	11	(19)	(19)
Current tax provision (benefit), Non-U.S.	102	91	67
Current tax provision (benefit), total	127	(6)	(201)
Deferred tax provision (benefit), U.S. federal	226	207	301
Deferred tax provision (benefit), U.S. state and local	6	46	45
Deferred tax provision (benefit), Non-U.S.	(28)	64	76
Deferred income tax provision (benefit), net	204	317	422
Income tax provision	$ 331	$ 311	$ 221