Pension and Savings Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Aug. 29, 2015	Aug. 30, 2014	Aug. 31, 2013
Compensation and Retirement Disclosure [Abstract]
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%
Cash contribution in asset allocation	$ 11,500,000	$ 12,600,000
Expected long-term rate of return on plan assets	7.00%	7.50%	7.50%
Plan benefit service cost	$ 0
Annual contributions by the Company to pension plans	17,077,000	$ 16,910,000	$ 16,900,000
Expected contributions to the plans by the Company in next 12 months	$ 6,300,000
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	$ 17,700,000	$ 15,600,000	$ 14,100,000