Derivatives and Hedging Activities (Details 2) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Pretax (losses) gains	$ (17)	$ (58)	$ (31)	$ 63
Other Expense [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax (losses) gains	$ (17)	$ (58)	$ (31)	$ 63