Financial Derivatives (Total Gross Derivatives) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Derivative Asset, Fair Value	$ 4,351,000,000	$ 4,793,000,000
Derivative Liability, Fair Value	3,547,000,000	3,934,000,000
Derivative Notional Amount	342,838,000,000	381,256,000,000
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	1,026,000,000	1,189,000,000
Derivative Liability, Fair Value	233,000,000	364,000,000
Derivative Notional Amount	43,305,000,000	36,197,000,000
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	3,325,000,000	3,604,000,000
Derivative Liability, Fair Value	3,314,000,000	3,570,000,000
Derivative Notional Amount	$ 299,533,000,000	$ 345,059,000,000