Financial Instruments and Fair Value Measurements - Summary of Quantitative about Significant Unobservable Inputs Used to Determine Fair Value of Impairment of Long-Lived Assets Held and Used (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impairment of Long Lived Assets				$ 2.2	$ 13.8
Total	$ 4.2	$ 14.9	$ 8.3	20.8	51.4
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total			$ 8.3	$ 7.8
Broker Quote / Indicative Bids | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impairment of Long Lived Assets					$ 37.6
Unobservable Input			Indicative Bids	Indicative Bids
Sales Value | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Unobservable Input			Sales Value	Sales Value
Land and building | Broker Quote / Indicative Bids | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impairment of Net Assets Held for Sale			$ 0.7	$ 5.6
Machinery and equipment | Sales Value | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impairment of Long Lived Assets			$ 7.6	$ 2.2