XML 44 R75.htm IDEA: XBRL DOCUMENT v3.2.0.727
Stockholder's Investments Stockholder's Investment - Schedule of Stock Option Valuation Assumptions (Details) - $ / shares
12 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 18 days 5 years 11 months 18 days 5 years 11 months 5 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate 34.01% 37.32% 38.67%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 2.48% 2.35% 2.21%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.90% 1.80% 0.90%
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Market Value Of Underlying Stock at Grant Date $ 22.76 $ 30.98 $ 30.58
Black-Scholes Option Valuation Assumptions, Weighted-Average Exercise Price 22.76 30.98 30.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 6.12 $ 9.17 $ 9.05