Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Income Tax Disclosure [Abstract]
Prepaid tax assets	$ 4.2	$ 4.4
Effective Income Tax Rate Reconciliation, Percent	25.90%	27.90%	27.90%
Deferred Tax Liabilities, Undistributed Foreign Earnings	$ 982.0
Deferred Tax Assets, Valuation Allowance	3.3	$ 2.7
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	0.4
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		1.8
Unrecognized Tax Benefits	$ 15.7	$ 18.2	$ 15.0	$ 18.4
Statutes Of Limitations Period For Unrecognized Tax Benefits	5 years
Maximum Reduction In Amount Of Unrecognized Tax Benefits, Resulting From Lapse Of Statute Of Limitations	$ 1.1
Foreign Earnings Repatriated	$ 83.0