XML 100 R63.htm IDEA: XBRL DOCUMENT v3.19.2
Stockholder's Investments Stockholder's Investment - Schedule of Stock Option Valuation Assumptions (Details) - $ / shares
12 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2017
Share-based Payment Arrangement [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 2 months 12 days 6 years 26 days 6 years 1 month 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate 26.05% 28.19% 29.55%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 2.71% 2.72% 2.70%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 3.01% 1.96% 1.26%
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Market Value Of Underlying Stock at Grant Date $ 43.96 $ 36.85 $ 35.14
Black-Scholes Option Valuation Assumptions, Weighted-Average Exercise Price 43.96 36.85 35.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 9.70 $ 7.96 $ 7.56