Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure abstract (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivative [Line Items]
Derivative Assets, Gross	$ 313	$ 280
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative Assets, Gross	251	236
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets, Gross	275	249
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative Assets, Gross	$ 244	$ 230