Location of Restructuring Charges Classified on Consolidated Balance Sheets (Detail) - USD ($) $ in Millions		Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	[1],[2]	$ 0.6	$ 3.8	$ 2.8
Accrued Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges		$ 0.6	3.4
Other long-term liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges			$ 0.4

[1] Activity in fiscal year 2014 pertains to both the Fiscal Year 2014 Restructuring Plan and the 2013 Restructuring Plan. In fiscal year 2014, the restructuring charges of $2.9 million relate to the Fiscal Year 2014 Restructuring Plan, while restructuring charges of $0.6 million and cash payments of ($2.5) million relate to the Fiscal Year 2013 Restructuring Plan.

[2] Activity in fiscal year 2015 pertains to both the Fiscal Year 2014 Restructuring Plan and the 2013 Restructuring Plan. In fiscal year 2015, the restructuring adjustments of ($0.3) million and cash payments of ($2.4) million relate to the Fiscal Year 2014 Restructuring Plan, while restructuring adjustments of ($0.1) million and cash payments of ($0.5) million relate to the Fiscal Year 2013 Restructuring Plan.