Leases - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Aug. 25, 2012
Leases [Line Items]
Rental expense	$ 253,800,000	$ 246,300,000	$ 229,400,000
Capital lease assets	121,200,000	107,500,000
Capital lease, accumulated amortization	53,600,000	44,800,000
Capital lease obligations	119,600,000	106,200,000
Current portion of capital lease obligations	36,505,000	32,246,000
Deferred rent	104,600,000	96,500,000
Remaining aggregate rental obligation	2,035,259,000
Sublease in Connection with Sale of TruckPro Business [Member]
Leases [Line Items]
Initial term of subleased properties in connection with sale of TruckPro business	Not less than 20 years
Remaining aggregate rental obligation	$ 13,900,000