Summary Of Fair Value Of Derivative Instruments On Consolidated Balance Sheet (Parenthetical) (Detail) (CAD) In Thousands, except Share data in Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Dec. 30, 2012
Derivatives, Fair Value [Line Items]
Notional value	240,471		236,484
Number of underlying common stock covered under contracts	1.0
Level 2
Derivatives, Fair Value [Line Items]
Bearer deposit notes, Fair value asset (liability)	41,403	[1]	41,403	[1]
Forward Currency Contracts | Level 2
Derivatives, Fair Value [Line Items]
Notional value	165,318	[2]	195,081	[2]
TRS | Level 2
Derivatives, Fair Value [Line Items]
Notional value	41,403	[3]	41,403	[3]
Ad Fund | Interest Rate Swap | Level 2
Derivatives, Fair Value [Line Items]
Notional value	33,750		0

[1] The Company holds these notes as collateral to reduce the carrying costs of the TRS. The interest rate on these notes resets every 90 days; therefore, the fair value of these notes, using a market approach, approximates the carrying value.

[2] The fair value of forward currency contracts is determined using prevailing exchange rates.

[3] The fair value of the TRS is determined using the Company's closing common share price on the last business day of the fiscal period, as quoted on the Toronto Stock Exchange ("TSX").