Financial Instruments and Fair Value Measurements - Recurring Fair Value Measurements (Detail) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	$ 44.0	$ 29.1
Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	16.5	8.9
Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.4	20.7
Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	2.6	0.1
Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(0.7)	(0.6)
Other long-term assets and other current assets | Cross Currency Interest Rate Contract
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	5.2
Level 1
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
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	0.0
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
Level 1 | Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
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
Level 1 | Other long-term assets and other current assets | Cross Currency Interest Rate Contract
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0
Level 2
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	23.6	8.4
Level 2 | Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	16.5	8.9
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
Level 2 | Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	2.6	0.1
Level 2 | Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(0.7)	(0.6)
Level 2 | Other long-term assets and other current assets | Cross Currency Interest Rate Contract
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	5.2
Level 3
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.4	20.7
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	0.0
Level 3 | Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.4	20.7
Level 3 | Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
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
Level 3 | Other long-term assets and other current assets | Cross Currency Interest Rate Contract
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	$ 0.0