Income Taxes (Schedule of Temporary Differences That Give Rise to Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Deferred tax assets
Accrued expenses	$ 11.6	$ 12.8
Compensation and retirement plans	26.4	28.3
Net operating loss (NOL) and tax credit carryforwards	6.4	7.9
Inventory reserves	2.3	2.6
Operating lease assets	11.6	12.7
Other	4.1	7.7
Gross deferred tax assets	62.4	72.0
Valuation allowance	(3.4)	(4.6)	$ (8.1)	$ (4.4)
Deferred tax assets, net of valuation allowance	59.0	67.4
Deferred tax liabilities
Depreciation and amortization	(57.0)	(57.0)
Operating lease liabilities	(11.6)	(12.7)
Other	(2.4)	(3.5)
Deferred tax liabilities	(71.0)	(73.2)
Net deferred tax liability	$ (12.0)	$ (5.8)