Financial Instruments and Fair Value Measurements - Recurring Fair Value Measurements (Details) - USD ($) $ in Millions	Oct. 31, 2019	Oct. 31, 2018
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	$ 7.6	$ 44.0
Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	1.3	16.5
Other long-term assets | Insurance annuity
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.0	20.4
Other long-term liabilities and other current liabilities | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(25.0)
Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.9	2.6
Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(0.2)	(0.7)
Other long-term assets and other current assets | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	10.6	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 long-term liabilities and other current liabilities | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	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 swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0	0.0
Level 2
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(12.4)	23.6
Level 2 | Other long-term assets | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	1.3	16.5
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 long-term liabilities and other current liabilities | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(25.0)
Level 2 | Other current assets | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.9	2.6
Level 2 | Other current liabilities | Foreign exchange hedges
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	(0.2)	(0.7)
Level 2 | Other long-term assets and other current assets | Cross currency swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	10.6	5.2
Level 3
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	20.0	20.4
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	20.0	20.4
Level 3 | Other long-term liabilities and other current liabilities | Interest rate derivatives
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	0.0
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 swap
Fair Value Assets Measured On Recurring Basis [Line Items]
Foreign exchange hedges/Insurance annuity	$ 0.0	$ 0.0