Other (Loss) Income, Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	$ (171)	$ (24)	$ (162)	$ (56)
Loss on Debt Extinguishment [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	(2)	0	(4)	0
Realized and unrealized loss on derivatives, net [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	(169)	0	(172)	0
Dividend expense related to securities sod, not yet purchased [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	(1)	(23)	(4)	(55)
(Loss) gain on disposition of assets [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	1	1	2	1
Appreciation on deferred management fee [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	0	0	0	(13)
Equity earnings from non-consolidated affiliates [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	6	5	30	21
Foreign currency translation loss [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	(8)	(1)	(15)	(7)
Other [Member]
Component of Other Income (Loss), Net [Line Items]
Other (loss) income, net	$ 2	$ (6)	$ 1	$ (3)