Draws on Credit Facility that are Designated as Net Investments in Foreign Operations (Detail) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended						3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 Canadian Dollars USD ($)		Mar. 31, 2014 Canadian Dollars USD ($)		Dec. 31, 2014 Canadian Dollars CAD		Mar. 31, 2015 Euros USD ($)	Dec. 31, 2014 Euros EUR (€)
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding	$ 685		$ 704	$ 36	[1]			46	[1]	$ 83	€ 77
Foreign currency translation and other comprehensive income (loss) of unconsolidated affiliates	$ (47)	$ 7		$ 2	[1]	$ 1	[1]			$ 10

[1] We have drawn an additional $48 million on the credit facility in Canadian dollars, which draw has not been designated as a hedging instrument.