Pension and Savings Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 30, 2014 Hedge_Fund_Manager Hedge_Strategies	Aug. 31, 2013	Aug. 25, 2012	Aug. 29, 2015 Scenario, Forecast [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Consecutive years of highest compensation used to determine defined benefit pension plan benefits	5 years
Pension plan asset constituted in alternate investment strategies	1.00%
Hedge fund managers diversified over hedge strategies	9
Different hedge strategies	4
Cash contribution in asset allocation	$ 12,600,000	$ 11,000,000
Expected long-term rate of return on plan assets	7.50%	7.50%	7.50%	7.00%
Plan benefit service cost	0
Annual contributions by the Company to pension plans	16,910,000	16,909,000	15,423,000
Expected contributions to the plans by the Company in fiscal 2015	2,600,000
Percentage of company matching retirement savings plan contributions that vest immediately	100.00%
Percentage of savings option up to qualified earnings	25.00%
Annual contribution by employer towards 401(k) Plan	$ 15,600,000	$ 14,100,000	$ 14,400,000