Draws on Credit Facility that are Designated as Net Investments in Foreign Operations (Detail) € in Millions, CAD in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 EUR (€)	Sep. 30, 2015 CAD	Dec. 31, 2014 USD ($)
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding		$ 1,009		$ 1,009				$ 704
Foreign currency translation and other comprehensive income (loss) of unconsolidated affiliates		(27)	$ (47)	(71)	$ (36)
Canadian Dollars
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding	[1]	34		34			CAD 46
Foreign currency translation and other comprehensive income (loss) of unconsolidated affiliates	[1]	3	1	4	1
Euros
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding		$ 86		86		€ 77
Foreign currency translation and other comprehensive income (loss) of unconsolidated affiliates			$ 8	$ 7	$ 9

[1] We have drawn an additional $46 million on the credit facility in Canadian dollars, which draw has not been designated as a hedging instrument.