Share-Based Payments - Additional Information (Detail) (USD $)	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total share-based compensation expense related to stock options and share purchase plans	$ 37,300,000	$ 33,400,000	$ 26,600,000
Share-based compensation expense for unvested awards not yet recognized in earnings	25,900,000
Weighted average period recognition of share-based compensation expense for unvested awards	2 years 6 months
Term of options from grant date	10 years or 10 years and one day
Exercise period of vested options after death	1 year
Restricted stock units granted under Director Compensation Program, description	Under the 2011 Program, restricted stock units are granted the first day of each calendar quarter. The number of restricted stock units granted each quarter is determined by dividing one-fourth of the amount of the annual retainer by the fair market value of the shares of common stock as of the grant date.
Maximum limit of the fees a Director can elect to receive in stock	100.00%
Accrued Director fees	7,600,000	6,700,000
Accrued Director fees in shares	17,990	18,241
Additional shares of stock or units	0
Number of shares for which each new non-employee director receives an option to purchase	3,000
Outstanding options	1,795,988	2,262,679
Common stock reserved for future issuance	234,744
Weighted average grant date fair value of options granted	$ 98.58	$ 94.71	$ 58.57
Intrinsic value of options exercised	194,600,000	176,500,000	100,000,000
Total fair value of options vested	37,300,000	32,600,000	20,700,000
Expense related to the discount on the selling of shares to employees and executives	1,500,000	1,500,000	1,400,000
Percent of market price at which employees permitted to purchase through payroll deductions	85.00%
Maximum permitted annual purchases per employee	$ 15,000
Maximum permitted annual purchases per employee, Percent of Compensation	10.00%
Shares sold to employees under employee stock purchase plan	18,228	19,403	21,608
Shares purchased from employees at fair value	22,915	24,113	30,864
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options	51,000	104,679
Common stock reserved for future issuance	0
Share based compensation grant date vesting period	3 years
Restated Executive Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance	248,953
Maximum permitted annual purchases per employee, Percent of Compensation	25.00%
Shares sold to employees under employee stock purchase plan	3,454	3,937	1,719
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period of vested options after service period	30 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period of vested options after service period	90 days