Derivatives (Details 2) In Millions, unless otherwise specified		1 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2013 Eurobond Due 2014 EUR (€)	Jul. 31, 2007 Fair value hedges Interest rate swap contracts Eurobond Due 2014 EUR (€)	Aug. 31, 2010 Fair value hedges Interest rate swap contracts Eurobond Due 2014 EUR (€)	Sep. 30, 2013 Derivatives designated as hedging instruments Fair value hedges USD ($)	Sep. 30, 2012 Derivatives designated as hedging instruments Fair value hedges USD ($)	Sep. 30, 2013 Derivatives designated as hedging instruments Fair value hedges USD ($)	Sep. 30, 2012 Derivatives designated as hedging instruments Fair value hedges USD ($)	Sep. 30, 2013 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts USD ($)	Sep. 30, 2013 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts Interest expense USD ($)	Sep. 30, 2012 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts Interest expense USD ($)	Sep. 30, 2013 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts Interest expense USD ($)	Sep. 30, 2012 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts Interest expense USD ($)
Derivatives in Fair Value Hedging Relationships
Derivative notional amount		€ 400						$ 342
Term of debt instrument		7 years
Face amount	1,025	750
Termination of notional amount of fixed-to-floating interest rate swap			150
Gain (loss) on termination of fixed-to-floating interest rate swap will be amortized over this debt's remaining life			18
Gain (Loss) on Derivative Recognized in income				(3)	0	(11)	(3)		(3)	0	(11)	(3)
Gain (Loss) on Hedged Item Recognized in Income				$ 3	$ 0	$ 11	$ 3		$ 3	$ 0	$ 11	$ 3