Financial Instruments and Fair Value Measurements - Recurring Fair Value Measurements (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Apr. 30, 2018	Oct. 31, 2017
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	$ 36.6	$ 29.1
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)	15.1	8.4
Level 3
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	21.5	20.7
Other long-term assets and other current assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	16.0	8.9
Other long-term assets and other current assets | Level 1 | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Other long-term assets and other current assets | Level 2 | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	16.0	8.9
Other long-term assets and other current assets | Level 3 | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0	0.0
Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.4	0.1
Other current assets | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	2.0
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
Other current assets | Level 1 | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0
Other current assets | Level 2 | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.4	0.1
Other current assets | Level 2 | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	2.0
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 assets | Level 3 | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0
Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	(1.4)	(0.6)
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)	(1.4)	(0.6)
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
Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	21.5	20.7
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 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 3 | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	21.5	$ 20.7
Other long-term liabilities | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	(1.9)
Other long-term liabilities | Level 1 | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	0.0
Other long-term liabilities | Level 2 | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	(1.9)
Other long-term liabilities | Level 3 | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value of assets (liabilities)	$ 0.0