Commitments and Contingencies - Future Minimum Lease Commitments (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2014
Capital Lease Commitments
October 31, 2015	$ 2.0
October 31, 2016	0.7
October 31, 2017	0.1
October 31, 2018	0
October 31, 2019	0
Thereafter	0
Total minimum lease commitments	2.8	[1]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
October 31, 2015	77.7	[2]
October 31, 2016	55.3	[2]
October 31, 2017	46.4	[2]
October 31, 2018	35.1	[2]
October 31, 2019	19.9	[2]
Thereafter	32.3	[2]
Total minimum lease commitments	266.7	[1],[2]
Unrecorded Unconditional Purchase Obligation, Imputed Interest	0.1
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	$ 2.7

[1] Our capital lease obligation includes total imputed interest of $0.1 million for a present value of minimum lease payments of $2.7 million.

[2] Sublease rental income was immaterial for all periods presented and is expected to be immaterial in the future.