Draws on Credit Facility that are Designated as Net Investments in Foreign Operations (Detail) € in Millions, CAD in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 CAD
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding		$ 770		$ 770		$ 704
Foreign currency translation and other comprehensive income (loss) of unconsolidated affiliates		3	$ 4	(44)	$ 11
Canadian Dollars
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding	[1]	37		37				CAD 46
Foreign currency translation and other comprehensive income (loss) of unconsolidated affiliates	[1]	(1)	(1)	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		$ (3)	$ 1	$ 7	$ 1

[1] We have drawn an additional $49 million on the credit facility in Canadian dollars, which draw has not been designated as a hedging instrument.