Summary of Charges Related to Accrued Restructuring Activity (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Oct. 31, 2013
Restructuring Cost and Reserve [Line Items]
Balance at beginning period	$ 2.8
Restructuring Charge	0.3
Adjustments	(0.3)
Cash payments	(0.6)
Currency Translation
Balance at end period	2.2
Employee Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Balance at beginning period	1.8
Restructuring Charge	0.2
Adjustments	(0.2)
Cash payments	(0.5)
Currency Translation
Balance at end period	1.3
Facility Exit Costs
Restructuring Cost and Reserve [Line Items]
Balance at beginning period	0.2
Currency Translation
Balance at end period	0.2
Aquisition Related Charges
Restructuring Cost and Reserve [Line Items]
Balance at beginning period	0.8
Restructuring Charge	0.1
Adjustments	(0.1)
Cash payments	(0.1)
Currency Translation
Balance at end period	$ 0.7