Equity Earnings of Unconsolidated Affiliates, Net of Tax and Net Income Attributable to Noncontrolling Interests - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Noncontrolling Interest [Abstract]
Equity earnings (losses)	$ (800,000)	$ 0	$ (800,000)	$ 0
Dividends received from company's equity method affiliates	0	0	0	0
Net income (loss) attributable to noncontrolling interests	$ 6,800,000	$ 3,900,000	$ 10,400,000	$ 6,500,000