Schedule II - Consolidated Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 11.8	$ 16.8	$ 13.5
Charged to Costs and Expenses	1.7	0.2	7.5
Charged to Other Accounts	(4.2)	(3.7)	(4.2)
Deductions	(0.5)	(1.5)	0.0
Balance at End of Period	8.8	11.8	16.8
Environmental reserves
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	8.2	24.7	26.8
Charged to Costs and Expenses	1.1	1.7	0.7
Charged to Other Accounts	(2.5)	(16.8)	(2.0)
Deductions	0.0	(1.4)	(0.8)
Balance at End of Period	$ 6.8	$ 8.2	$ 24.7