Derivatives (Details 3) In Millions, unless otherwise specified		3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013 Eurobond Due 2014 EUR (€)	Sep. 30, 2013 Net Investment Hedges USD ($)	Sep. 30, 2012 Net Investment Hedges USD ($)	Sep. 30, 2013 Net Investment Hedges USD ($)	Sep. 30, 2012 Net Investment Hedges USD ($)	Jul. 31, 2007 Net Investment Hedges Foreign Currency Denominated Debt EUR (€)	Sep. 30, 2013 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Sep. 30, 2012 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Sep. 30, 2013 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Sep. 30, 2012 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Dec. 31, 2007 Net Investment Hedges Foreign Currency Denominated Debt EUR (€)
Net investment hedges
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument		$ (52)	$ (45)	$ (35)	$ 5		$ (52)	$ (45)	$ (35)	$ 5
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income		0	0	0	0		0	0	0	0
Term of debt instrument						7 years					7 years
Face amount	€ 1,025					€ 750					€ 275