Consolidation of Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Oct. 31, 2016
Variable Interest Entity [Line Items]
Restricted bank financial instruments under Buyer SPE	$ 50.9		$ 50.9		$ 50.9
Interest income of Buyer SPE	0.6	$ 0.6	1.2	$ 1.2
Net income (loss) attributable to noncontrolling interests	3.9	1.1	$ 6.5	2.3
Buyer Spe
Variable Interest Entity [Line Items]
Ownership interest			0.00%
STA Timber
Variable Interest Entity [Line Items]
Debt instrument, principal outstanding	43.3		$ 43.3		$ 43.3
Interest expense	0.6	0.6	1.2	1.2
Flexible Packaging JV
Variable Interest Entity [Line Items]
Net income (loss) attributable to noncontrolling interests	$ (1.2)	$ 1.6	$ (1.8)	$ 2.6