Equity Earnings of Unconsolidated Affiliates, Net of Tax and Net (Income) Loss Attributable to Noncontrolling Interests - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Equity earnings of affiliates	$ 2.0	$ 0.8	$ 0.8
Dividends received from company's equity method affiliates	0.4	0.4	0.2
Net (income) loss attributable to noncontrolling interests	$ (16.5)	$ (0.6)	$ 4.7