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Share-Based Payments - Additional Information (Detail) - USD ($) | 12 Months Ended
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Aug. 31, 2019 | Aug. 25, 2018 | Aug. 26, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average grant date fair value of options granted | $ 208.37 | $ 129.12 | $ 139.80
Total share-based compensation expense related to stock options and share purchase plans | $ 43,255,000 | $ 43,674,000 | $ 38,244,000
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 were granted the first day of each calendar quarter. The number of restricted stock units granted each quarter was 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. |  |
Intrinsic value of options exercised | $ 227,400,000 | 123,100,000 | 93,900,000
Total fair value of options vested | 34,500,000 | 35,700,000 | 34,700,000
Expense related to the discount on the selling of shares to employees and executives | $ 2,800,000 | $ 2,100,000 | $ 1,800,000
Shares sold to employees under employee stock purchase plan | 11,011 | 14,523 | 14,205
Shares purchased from employees at fair value | 17,201 | 11,816 | 12,455
Common stock reserved for future issuance | 152,766 |  |
Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise period of vested options after service period | 90 days |  |
Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercise period of vested options after service period | 30 days |  |
2003 Comp Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Accrued Director fees | $ 11,200,000 | $ 13,600,000 |
Additional shares of stock or units | 0 |  |
Accrued Director fees in shares | 10,206 | 17,710 |
Restated Executive Stock Purchase Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation expense related to stock options and share purchase plans | $ 43,300,000 | $ 43,700,000 | $ 38,200,000
Share-based compensation expense for unvested awards not yet recognized in earnings | $ 34,300,000 |  |
Weighted average period recognition of share-based compensation expense for unvested awards | 1 year 8 months 12 days |  |
Shares sold to employees under employee stock purchase plan | 1,483 | 1,840 | 1,865
Common stock reserved for future issuance | 236,565 |  |
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Non vested restricted stock unit award | $ 5,600,000 |  |
Estimated weighted average period | 3 years 1 month 6 days |  |
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Term of options from grant date | 10 years or 10 years and one day |  |

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