Derivative Instruments and Other Financial Instruments Used For Hedging (Details 4) (Trading Derivatives, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Trading Derivatives
Gain or (Loss) Recognized in Income on Derivative Instruments	$ 12	$ 16	$ 28	$ 18
Interest rate derivative contracts
Trading Derivatives
Gain or (Loss) Recognized in Income on Derivative Instruments	9	10	19	9
Equity contracts
Trading Derivatives
Gain or (Loss) Recognized in Income on Derivative Instruments			1
Foreign exchange derivative contracts
Trading Derivatives
Gain or (Loss) Recognized in Income on Derivative Instruments	2	5	6	8
Commodity contracts
Trading Derivatives
Gain or (Loss) Recognized in Income on Derivative Instruments	(1)	1	1
Other contracts
Trading Derivatives
Gain or (Loss) Recognized in Income on Derivative Instruments	$ 2		$ 1	$ 1