Derivatives and Hedging Activities (Details Textuals) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Derivatives and Hedging Activities (Textuals) [Abstract]
Net reduction in interest expense on long term debt and other	$ 74,000,000	$ 91,000,000	$ 143,000,000	$ 203,000,000
Derivative asset not offset	0		0		0
Derivative liabilities not offset	0		0		0
Shares held in equity investment	34.3		34.3		180.7
Margin On Interest Rate Swap Not Netted	66,000,000		66,000,000		26,000,000
Derivative [Line Items]
Equity investment	24,000,000		24,000,000		124,000,000
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net hedge ineffectiveness	0	0	0	0
Net Investment Hedging [Member] | Other Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from AOCI into income	(7,000,000)	0	(9,000,000)	0
ICBC [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Derivative [Line Items]
Equity investment	21,700,000		21,700,000		122,000,000
Fair Value Hedges [Member]
Derivative [Line Items]
Notional amount of long-term debt	17,600,000,000		17,600,000,000		14,700,000,000
Net Investment Hedges [Member]
Derivative [Line Items]
Effective portion of gain (loss) on hedges	(116,000,000)	339,000,000	(133,000,000)	283,000,000
Credit Valuation Adjustment [Member]
Derivative [Line Items]
Notional amount of long-term debt	$ 0		$ 0		$ 0