Sale of Non-United States Accounts Receivable - Company's Accounts Receivables Programs (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
European RPA
Finance Receivable Transferred To Held For Sale [Line Items]
Gross accounts receivable sold to third party financial institution	$ 176.5	$ 162.3	$ 314.1	$ 303.3
Cash received for accounts receivable sold under the programs	156.2	143.5	278.2	268.5
Deferred purchase price related to accounts receivable sold	20.3	18.6	35.9	34.4
Loss associated with the programs	0.1	(0.2)	(0.2)	(0.5)
Expenses associated with the programs	0.0	0.0	0.0	0.0
Accounts receivable sold to and held by third party financial institution	126.7		126.7		$ 106.7
Deferred purchase price asset (liability) related to accounts receivable sold	23.8		23.8		(0.4)
Singapore RPA
Finance Receivable Transferred To Held For Sale [Line Items]
Gross accounts receivable sold to third party financial institution	15.1	10.4	25.0	21.1
Cash received for accounts receivable sold under the programs	13.7	10.4	21.7	21.1
Deferred purchase price related to accounts receivable sold	1.3	0.0	3.2	0.0
Loss associated with the programs	0.0	0.0	0.0	0.0
Expenses associated with the programs	0.0	0.0	0.0	0.0
Accounts receivable sold to and held by third party financial institution	5.5		5.5		4.0
Deferred purchase price asset (liability) related to accounts receivable sold	0.5		0.5		0.5
Total RPAs and Agreements
Finance Receivable Transferred To Held For Sale [Line Items]
Gross accounts receivable sold to third party financial institution	191.6	172.7	339.1	324.4
Cash received for accounts receivable sold under the programs	169.9	153.9	299.9	289.6
Deferred purchase price related to accounts receivable sold	21.6	18.6	39.1	34.4
Loss associated with the programs	0.1	(0.2)	(0.2)	(0.5)
Expenses associated with the programs	0.0	$ 0.0	0.0	$ 0.0
Accounts receivable sold to and held by third party financial institution	132.2		132.2		110.7
Deferred purchase price asset (liability) related to accounts receivable sold	$ 24.3		$ 24.3		$ 0.1