Components of Net Deferred Tax Assets (Detail) - USD ($) $ in Millions	Jul. 31, 2016	Jul. 31, 2015
Assets
Compensation	$ 10.0	$ 8.4
Accruals and reserves	5.5	5.7
Comprehensive income	2.0	1.4
Net operating losses and credit carryforwards	17.0	19.6
Other	0.9	0.6
Deferred tax assets	35.4	35.7
Valuation allowance	(11.4)	(10.6)
Total deferred tax assets	24.0	25.1
Liabilities
Depreciation related	(8.0)	(8.7)
Goodwill and intangibles	(5.3)	(6.5)
Total deferred tax liabilities	(13.3)	(15.2)
Net deferred tax assets	$ 10.7	$ 9.9