Restructuring and Related Costs - Narrative (Details) $ in Millions	Jul. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Cost recognized	$ 31.9
External Support Fees
Restructuring Cost and Reserve [Line Items]
Cost recognized	14.3
Employee Severance
Restructuring Cost and Reserve [Line Items]
Cost recognized	12.0
Asset Impairment Costs
Restructuring Cost and Reserve [Line Items]
Cost recognized	2.6
Lease Exit and Other
Restructuring Cost and Reserve [Line Items]
Cost recognized	$ 3.1