Income Taxes (Schedule Of Reconciliation Of Beginning And Ending Amount Of Gross Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Reconciliation of the Beginning and Ending Amounts of Gross Unrecognized Tax Benefits [Roll Forward]
Gross unrecognized tax benefits at beginning of fiscal year	$ 18.2	$ 15.0	$ 18.4
Additions for tax positions of the current year	3.4	4.7	2.9
Additions for tax positions of prior years	0.1	0.1	1.7
Reductions for tax positions of prior years	(4.9)	(0.6)	(7.1)
Settlements	(0.1)	0.0	(0.2)
Reductions due to lapse of applicable statute of limitations	(1.0)	(1.0)	(0.7)
Gross unrecognized tax benefits at end of fiscal year	$ 15.7	$ 18.2	$ 15.0