Share-Based Payments (Tables)

5 Months Ended

Feb. 10, 2018

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 twenty-four week period ended February 10, 2018, and February 11, 2017, using the Black-Scholes-Merton multiple-option pricing valuation model, was $128.99 and $139.80 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 10,     2018		February 11,     2017
Expected price volatility		20%		18%
Risk-free interest rate		1.9%		1.2%
Weighted average expected lives (in years)		5.1		5.1
Forfeiture rate		10%		10%
Dividend yield		0%		0%