Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 29, 2012
Line of Credit Facility [Line Items]
Description of interest rate on credit facility	Borrowings in U.S. dollars under the new credit facility, at our election, bear interest at (a) the adjusted London Interbank Offered Rate (“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 new 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%
Long-Term debt, 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	102.0
Letter of credit sublimit	50.0
Outstanding letters of credit	0.6
Fee payment on unused credit balances, percentage	0.175%
Unsecured revolving credit facility [Member] | Condition A in US Dollars | 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 | 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%, plus, in, in each case, a margined 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, in each case, a margined 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	28.6
Outstanding letters of credit	21.4
Interest rate	0.99%
Eurocurrency Rate Loan [Member] | Unsecured revolving credit facility [Member]
Line of Credit Facility [Line Items]
Interest rate spread on notes	1.125%
Interest rate	1.36%
Overnight Base Rate Loans [Member] | Unsecured revolving credit facility [Member]
Line of Credit Facility [Line Items]
Interest rate	3.25%