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Share-Based Payments (Tables) | 8 Months Ended
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May 04, 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 weighted average fair value of the stock option awards granted during the thirty-six week periods ended May 4, 2019 and May 5, 2018, using the Black-Scholes-Merton multiple-option pricing valuation model, was $208.37 and $129.12 per share, respectively, using the following weighted average key assumptions:
|  | Thirty-Six Weeks Ended |
|  | May 4, 2019 |  | May 5, 2018
Expected price volatility |  |  | 21 | % |  |  | 20 | %
Risk-free interest rate |  |  | 3.0 | % |  |  | 1.9 | %
Weighted average expected lives (in years) |  |  | 5.6 |  |  |  | 5.1 |
Forfeiture rate |  |  | 10 | % |  |  | 10 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %

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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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