Sale of Non-United States Accounts Receivable - Company's Accounts Receivables Programs (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Oct. 31, 2016
European RPA
Finance Receivable Transferred To Held For Sale [Line Items]
Gross accounts receivable sold to third party financial institution	$ 192.2	$ 160.0	$ 506.3	$ 463.3
Cash received for accounts receivable sold under the programs	170.0	140.7	448.2	409.2
Deferred purchase price related to accounts receivable sold	22.2	19.3	58.1	53.7
Loss associated with the programs	0.1	0.2	0.3	0.7
Expenses associated with the programs	0.0	0.0	0.0	0.0
Accounts receivable sold to and held by third party financial institution	147.8		147.8		$ 106.7
Deferred purchase price asset (liability) related to accounts receivable sold	32.7		32.7		(0.4)
Singapore RPA
Finance Receivable Transferred To Held For Sale [Line Items]
Gross accounts receivable sold to third party financial institution	12.4	11.4	37.4	32.5
Cash received for accounts receivable sold under the programs	10.3	11.4	32.0	32.5
Deferred purchase price related to accounts receivable sold	2.2	0.0	5.4	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	3.5		3.5		4.0
Deferred purchase price asset (liability) related to accounts receivable sold	0.8		0.8		0.5
Total RPAs and Agreements
Finance Receivable Transferred To Held For Sale [Line Items]
Gross accounts receivable sold to third party financial institution	204.6	171.4	543.7	495.8
Cash received for accounts receivable sold under the programs	180.3	152.1	480.2	441.7
Deferred purchase price related to accounts receivable sold	24.4	19.3	63.5	53.7
Loss associated with the programs	0.1	0.2	0.3	0.7
Expenses associated with the programs	0.0	$ 0.0	0.0	$ 0.0
Accounts receivable sold to and held by third party financial institution	151.3		151.3		110.7
Deferred purchase price asset (liability) related to accounts receivable sold	$ 33.5		$ 33.5		$ 0.1