Derivatives (Details 1) In Millions, unless otherwise specified		1 Months Ended		1 Months Ended				3 Months Ended			3 Months Ended
	Mar. 31, 2014 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 (€)	Nov. 30, 2013 Fair value hedges Interest rate swap contracts Eurobond Due 2021 EUR (€)	Dec. 31, 2007 Net Investment Hedges Eurobond Due 2014 EUR (€)	Jul. 31, 2007 Net Investment Hedges Eurobond Due 2014 EUR (€)	Nov. 30, 2013 Net Investment Hedges Eurobond Due 2021 EUR (€)	Mar. 31, 2014 Derivatives designated as hedging instruments Fair value hedges USD ($)	Mar. 31, 2013 Derivatives designated as hedging instruments Fair value hedges USD ($)	Mar. 31, 2014 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts USD ($)	Mar. 31, 2014 Derivatives designated as hedging instruments Fair value hedges Interest rate swap contracts Interest expense USD ($)	Mar. 31, 2013 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		€ 300						$ 745
Term of debt instrument		7 years		8 years	7 years	7 years	8 years
Face amount	1,025	750		600	275	750	600
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
Interest rate, stated percentage (as a percent)				1.875%
Gain (Loss) on Derivative Recognized in income								7	(5)		7	(5)
Gain (Loss) on Hedged Item Recognized in Income								$ (7)	$ 5		$ (7)	$ 5