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		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non-cash asset impairment charges	$ 0.4	$ 2.0	$ 3.3	$ 3.9
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Non-cash asset impairment charges			3.3	3.9
Level 3 | Sales Value
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impairment of Long Lived Assets			2.9
Level 3 | Sales Value | Machinery and Equipment
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impairment of Long Lived Assets				0.3
Level 3 | Broker Quote/ Indicative Bids
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impairment of Net Assets Held for Sale			$ 0.4
Level 3 | Broker Quote/ Indicative Bids | Land and Building
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impairment of Net Assets Held for Sale				$ 3.6