Financial Instruments and Fair Value Measurements - Recurring Fair Value Measurements (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jul. 31, 2017	Oct. 31, 2016
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	$ 28.0	$ 20.1
Level 1
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Level 2
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	6.6	0.0
Level 3
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	21.4	20.1
Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	21.4	20.1
Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	7.1
Other long-term assets | Level 1 | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Other long-term assets | Level 1 | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0
Other long-term assets | Level 2 | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Other long-term assets | Level 2 | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	7.1
Other long-term assets | Level 3 | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	21.4	20.1
Other long-term assets | Level 3 | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0
Prepaid expenses and other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.1	0.3
Prepaid expenses and other current assets | Level 1 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Prepaid expenses and other current assets | Level 2 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.1	0.3
Prepaid expenses and other current assets | Level 3 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	(0.6)	(0.3)
Other current liabilities | Level 1 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Other current liabilities | Level 2 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	(0.6)	(0.3)
Other current liabilities | Level 3 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	$ 0.0	$ 0.0