Income Taxes (Schedule Of Temporary Differences That Give Rise To Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Jul. 31, 2016	Jul. 31, 2015
Deferred tax assets:
Accrued expenses	$ 12.1	$ 10.6
Compensation and retirement plans	59.5	39.1
NOL and tax credit carryforwards	6.5	4.3
LIFO and inventory reserves	5.4	6.9
Other	4.0	5.0
Gross deferred tax assets	87.5	65.9
Valuation allowance	(3.3)	(2.7)
Net deferred tax assets	84.2	63.2
Deferred tax liabilities:
Depreciation and amortization	(57.5)	(50.6)
Other	(1.2)	(2.4)
Deferred tax liabilities	(58.7)	(53.0)
Prepaid tax assets	4.2	4.4
Net tax asset	$ 29.7	$ 14.6