Goodwill and Other Intangibles Assets - Estimated Annual Amortization Expense (Detail) $ in Millions	Oct. 31, 2015 USD ($)	[1]
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated Amortization Expense 2016	$ 22.0
Estimated Amortization Expense 2017	19.6
Estimated Amortization Expense 2018	16.8
Estimated Amortization Expense 2019	14.2
Estimated Amortization Expense 2020	$ 11.8

[1] These amounts may vary as acquisitions of additional intangible assets occur in the future and as purchase price allocations are finalized for existing acquisitions.