Derivative Instruments and Hedging Strategies (Movements out of OCI) (Details) (Designated as Hedging Instrument [Member], Foreign Exchange Contract [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Amount of gain reported as a component of AOCI on derivatives, net of tax (effective portion)	$ 8
Amount of pre-tax gain reclassified from AOCI into income (effective portion)	0
Amount of pre-tax gain recognized in other income (expense) (ineffective portion and amount excluded from effectiveness testing)	$ 9