Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Income Tax Disclosure [Abstract]
Undistributed earnings of non-U.S. subsidiaries	$ 1,100.0
Foreign earnings repatriated	67.1
Unrecognized tax benefits, interest expense recognized	0.4
Unrecognized tax benefits, accrued interest and penalties on a gross basis	$ 2.3	$ 1.8
Unrecognized tax benefits, period for unrecognized tax benefits	5 years
Maximum reduction in amount of unrecognized tax benefits resulting from lapse of statute of limitations	$ 2.6