Derivatives (Details 2)			3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended
	Sep. 30, 2014 Eurobond repaid July 2014 EUR (€)	Jun. 30, 2014 Eurobond repaid July 2014 EUR (€)	Sep. 30, 2014 Net Investment Hedges USD ($)	Sep. 30, 2013 Net Investment Hedges USD ($)	Sep. 30, 2014 Net Investment Hedges USD ($)	Sep. 30, 2013 Net Investment Hedges USD ($)	Sep. 30, 2014 Net Investment Hedges Foreign currency forward contracts USD ($)	Sep. 30, 2014 Net Investment Hedges Foreign currency forward contracts USD ($)	Sep. 30, 2014 Net Investment Hedges Foreign currency forward contracts EUR (€)	Nov. 30, 2013 Net Investment Hedges Foreign currency forward contracts that matured in November 2013 EUR (€)	Sep. 30, 2014 Net Investment Hedges Foreign currency forward contracts that matured in September 2014 USD ($)	Sep. 30, 2014 Net Investment Hedges Foreign currency forward contracts that matured in September 2014 EUR (€)	Sep. 30, 2014 Net Investment Hedges Foreign currency forward contracts that will mature in November 2014 EUR (€)	Sep. 30, 2014 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Sep. 30, 2013 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Sep. 30, 2014 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Sep. 30, 2013 Net Investment Hedges Foreign Currency Denominated Debt USD ($)	Jul. 31, 2007 Net Investment Hedges Eurobond repaid July 2014 EUR (€)	Dec. 31, 2007 Net Investment Hedges Eurobond repaid July 2014 EUR (€)	Nov. 30, 2013 Net Investment Hedges Eurobond Due 2021 EUR (€)
Net investment hedges
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument			$ 1,000,000	$ (52,000,000)	$ (25,000,000)	$ (35,000,000)	$ 55,000,000	$ 56,000,000						$ (54,000,000)	$ (52,000,000)	$ (81,000,000)	$ (35,000,000)
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income			0	0	0	0	0	0						0	0	0	0
Term of debt instrument																		7 years	7 years	8 years
Face amount	1,025,000,000																	750,000,000	275,000,000	600,000,000
Derivative notional amount									1,250,000,000	594,000,000		550,000,000	700,000,000
Face amount of debt dedesignated from net investment hedge	309,000,000	716,000,000
Effective portion of net investment hedge reclassified out of other comprehensive income into income					0
Cash proceeds received on net investment hedge contract settlement											$ 37,000,000