Derivatives and Hedging Activities (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from AOCI into income	$ 0	$ 0	$ 0	$ (1)
Net hedge ineffectiveness	0	0	0	0
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from AOCI into income	0	0	0	0
Net hedge ineffectiveness	$ 0	$ 0	$ 0	$ 0