Equity (Details) (USD $) In Millions, except Share data	3 Months Ended		6 Months Ended		18 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Dec. 31, 2010
Stock Repurchase Plan Abstract
Stock Repurchase Plan Amount Authorized Total	$ 500		$ 500		$ 500
Acquisition of treasury stock (shares)			7,717,711		16,100,536
Treasury Stock Value Acquired Cost Method Excluding Commissions			98		198
Treasury Stock Acquired Average Cost Per Share			$ 12.76		$ 12.29
Treasury stock, shares	24,562,692		24,562,692		24,562,692	17,287,073
Components Of Comprehensive Income
Net income	427	429	910	831
Change in fair value of available-for-sale securities, net of income tax benefit of $0, $1, $1 and $4, respectively	(1)	(2)	(2)	(6)
Foreign currency translation adjustments, net of income tax (expense) benefit of $(10), $3, $(14) and $7, respectively	134	408	262	234
Derivative activity:
Reclassification to earnings, net of income tax (expense) benefit of $5, $(8), $(3) and $(19), respectively	29	36	59	68
Change in derivative fair value, net of income tax benefit of $34, $45, $26 and $58, respectively	(110)	(171)	(69)	(237)
Total change in fair value of derivatives	(81)	(135)	(10)	(169)
Change in unfunded pension obligation, net of income tax (expense) of $(2), $(1), $(4) and $(2), respectively	4	3	7	5
Other comprehensive income (loss)	56	274	257	64
Comprehensive income	483	703	1,167	895
Less: Comprehensive income attributable to noncontrolling interests	339	280	664	404
Total comprehensive income	144	423	503	491
Components Of Comprehensive Income (Parentheticals)
Change in fair value of available-for-sale securities, income tax	0	1	1	4
Foreign currency translation adjustments, income tax	(10)	3	(14)	7
Derivative reclassification to earnings, income tax	5	(8)	(3)	(19)
Change in derivative fair value, income tax	34	45	26	58
Change in unfunded pension obligation, income tax	(2)	(1)	(4)	(2)
Accumulated Other Comprehensive Loss
Foreign currency translation adjustment	1,706		1,706		1,706	1,824
Unrealized derivative losses, net	357		357		357	344
Unfunded pension obligation	214		214		214	216
Securities available-for-sale	1		1		1	(1)
Accumulated other comprehensive loss	$ 2,278		$ 2,278		$ 2,278	$ 2,383