Financial Instruments and Fair Value Measurements - Recurring Fair Value Measurements (Detail) - USD ($) $ in Millions	Oct. 31, 2017	Oct. 31, 2016
Level 2 | Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	$ 0.0	$ 0.0
Fair Value, Measurements, Recurring
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	29.1	20.1
Fair Value, Measurements, Recurring | Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	8.9
Fair Value, Measurements, Recurring | Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.7	20.1
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.1	0.3
Fair Value, Measurements, Recurring | Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(0.6)	(0.3)
Fair Value, Measurements, Recurring | Level 1
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
Fair Value, Measurements, Recurring | Level 1 | Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0
Fair Value, Measurements, Recurring | Level 1 | Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
Fair Value, Measurements, Recurring | Level 1 | Prepaid expenses and other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
Fair Value, Measurements, Recurring | Level 1 | Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
Fair Value, Measurements, Recurring | Level 2
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	8.4	0.0
Fair Value, Measurements, Recurring | Level 2 | Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	8.9
Fair Value, Measurements, Recurring | Level 2 | Prepaid expenses and other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.1	0.3
Fair Value, Measurements, Recurring | Level 2 | Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(0.6)	(0.3)
Fair Value, Measurements, Recurring | Level 3
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.7	20.1
Fair Value, Measurements, Recurring | Level 3 | Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0
Fair Value, Measurements, Recurring | Level 3 | Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.7	20.1
Fair Value, Measurements, Recurring | Level 3 | Prepaid expenses and other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
Fair Value, Measurements, Recurring | Level 3 | Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	$ 0.0	$ 0.0