Accounting For Stock-Based Compensation (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual dividend yield			1.40%
Weighted average fair value for options granted, per share			$ 11.51	$ 8.37
Pre-tax stock-based compensation expense	$ 2.2	$ 1.4	$ 8.3	$ 6.9
Tax benefit associated with stock options	0.7	0.4	2.7	2.2
Total intrinsic value of options exercised			19.8	27.5
Aggregate intrinsic value of options outstanding	111.7		111.7
Aggregate intrinsic value of options exercisable	104.6		104.6
2010 Master Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to non-vested stock options granted	$ 9.3		$ 9.3
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life			4 years
Expected volatility			21.00%
Risk-free interest rate			1.21%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life			8 years
Expected volatility			28.00%
Risk-free interest rate			2.83%