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Share-Based Payments (Tables) | 12 Months Ended
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Aug. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted and Related Share-Based Compensation Expense | The following table presents the weighted average for key assumptions used in determining the fair value of options granted and the related share-based compensation expense:
|  | Year Ended |
|  | August 31, 2019 |  |  | August 25, 2018 |  |  | August 26, 2017 |
Expected price volatility |  |  | 21 | % |  |  | 20 | % |  |  | 18 | %
Risk-free interest rates |  |  | 3.0 | % |  |  | 1.9 | % |  |  | 1.2 | %
Weighted average expected lives (in years) |  |  | 5.6 |  |  |  | 5.1 |  |  |  | 5.1 |
Forfeiture rate |  |  | 10 | % |  |  | 10 | % |  |  | 10 | %
Dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Stock Option Activity | The following table summarizes information about stock option activity for the year ended August 31, 2019:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding – August 25, 2018 |  |  | 1,706,866 |  |  | $ | 534.74 |  |  |  |  |  |  |  |  |
Granted |  |  | 172,750 |  |  |  | 774.33 |  |  |  |  |  |  |  |  |
Exercised |  |  | (471,216 | ) |  |  | 413.60 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (59,089 | ) |  |  | 679.92 |  |  |  |  |  |  |  |  |
Outstanding – August 31, 2019 |  |  | 1,349,311 |  |  |  | 601.36 |  |  |  | 6.08 |  |  | $ | 675,097 |
Exercisable |  |  | 793,266 |  |  |  | 528.85 |  |  |  | 4.88 |  |  |  | 454,415 |
Expected to vest |  |  | 500,441 |  |  |  | 704.81 |  |  |  | 7.80 |  |  |  | 198,614 |
Available for future grants |  |  | 547,519 |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Nonvested Restricted Stock Units Activity | Transactions related to restricted stock units for the fiscal year ended August 31, 2019 as follow:
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value |
Nonvested at August 25, 2018 |  |  | — |  |  |  | — |
Granted |  |  | 13,021 |  |  | $ | 786.08 |
Vested |  |  | (2,514 | ) |  |  | 838.34 |
Canceled or forfeited |  |  | (458 | ) |  |  | 772.80 |
Nonvested at August 31, 2019 |  |  | 10,049 |  |  | $ | 773.61 |

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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