Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Dec. 29, 2012
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	Borrowings in U.S. dollars under this credit facility, at our election, bear interest at (a) adjusted LIBOR for specified interest periods plus a margin, which can range from 1.00% to 2.00%, determined with reference to our consolidated leverage ratio or (b) a floating rate equal to the greatest of (i) JPMorgan's prime rate, (ii) the federal funds rate plus 0.50% and (iii) the adjusted LIBOR for a one month interest period plus 1.00%, plus, in each case, a margin determined with reference to our consolidated leverage ratio. Base rate loans will, at our election, bear interest at (i) the rate described in clause (b) above or (ii) a rate to be agreed upon by us and JPMorgan. Borrowings in Canadian dollars under the credit facility will bear interest at (a) the Canadian deposit offered rate plus 0.10% for specified interest periods plus a margin determined with reference to our consolidated leverage ratio or (b) a floating rate equal to the greater of (i) the Canadian prime rate and (ii) the Canadian deposit offered rate for a one month interest period plus 1.00%, plus, in each case, a margin determined with reference to our consolidated leverage ratio.
Unsecured private placement notes [Member]
Line of Credit Facility [Line Items]
Interest rate spread on notes	0.60%
Outstanding balance, notes	75.0
Long-term debt description of rate	The notes bear interest at 0.60% over LIBOR
Long-term debt maturities	Jun. 30, 2015
Periodic payment description	The notes do not require principal payments until maturity
Interest rate on notes	0.96%
Long-term debt, notes	75.0
Unsecured revolving credit facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility	250.0
Debt facility expiration date	Mar. 07, 2017
Term of unsecured revolving credit	5 years
Borrowings outstanding under the revolving credit facility	121.5
Letters of credit sub-limit	50.0
Outstanding letters of credit	0.6
Interest rate	1.74%
Fee payment on unused credit balances, percentage	0.25%
Unsecured revolving credit facility [Member] | Condition A in US Dollars [Member]
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	The adjusted LIBOR for specified interest periods plus a margin, which can range from 1.00% to 2.00%, determined with reference to our consolidated leverage ratio
Unsecured revolving credit facility [Member] | Condition A in US Dollars [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate spread on notes	1.00%
Unsecured revolving credit facility [Member] | Condition A in US Dollars [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate spread on notes	2.00%
Unsecured revolving credit facility [Member] | Condition B-ii in US Dollars [Member]
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	Federal funds rate plus 0.50%
Interest rate spread on notes	0.50%
Unsecured revolving credit facility [Member] | Condition B-iii in US Dollars [Member]
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	The adjusted LIBOR for a one month interest period plus 1.00%, plus, in each case, a margin determined with reference to our consolidated leverage ratio.
Interest rate spread on notes	1.00%
Unsecured revolving credit facility [Member] | Condition A in Canadian Dollars [Member]
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	The Canadian deposit offered rate plus 0.10% for specified interest periods plus a margin determined with reference to our consolidated leverage ratio.
Interest rate spread on notes	0.10%
Unsecured revolving credit facility [Member] | Condition B-ii in Canadian Dollars [Member]
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	The Canadian deposit offered rate for a one month interest period plus 1.00%, plus, in each case, a margin determined with reference to our consolidated leverage ratio.
Interest rate spread on notes	1.00%
Secured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility	50.0
Debt facility expiration date	Sep. 27, 2013
Description of interest rate on credit facility	We pay interest at a rate per annum equal to a margin of 0.76%, plus LIBOR.
Interest rate spread on notes	0.76%
Borrowings outstanding under the revolving credit facility	23.8
Outstanding letters of credit	26.2
Interest rate	0.97%