Draws on Credit Facility that are Designated as Net Investments in International Operations (Parenthetical) (Detail) (Canadian Dollars) In Millions, unless otherwise specified	Dec. 31, 2013 USD ($)		Dec. 31, 2013 CAD		Dec. 31, 2013 Not Designated as Hedging Instrument USD ($)
Debt Instrument Designated As Hedges Of Net Investment In Foreign Operations [Line Items]
Balance Outstanding	$ 29	[1]	31	[1]	$ 71

[1] We have drawn an additional $71 million on the credit facility in Canadian dollars that has not been designated as a hedging instrument.