Change in Plan Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of fiscal year	$ 15.7	$ 13.4
Actual return on plan assets	1.5	2.2
Employer contributions	0.8	1.5
Plan participant contributions	0.2	0.2
Benefits paid	(0.4)	(0.9)
Foreign currency exchange loss	(2.8)	(0.8)
Transfers from other plans		0.1
Balance at end of fiscal year	15.0	15.7
Funded status	(2.0)	(2.4)
Recognized Long-term liability	$ (2.0)	$ (2.4)