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Business Segment Information - Net Sales to External Customers by Geographical Area (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Net sales
Total net sales	$ 868.5	$ 930.0	$ 915.9	$ 902.3	$ 1,048.1	$ 1,124.0	$ 1,065.5	$ 1,001.5	$ 3,616.7	$ 4,239.1	$ 4,219.9
United States [Member]
Net sales
Total net sales									1,787.1	1,905.8	1,843.6
Europe, Middle East and Africa [Member]
Net sales
Total net sales									1,287.2	1,596.2	1,610.6
Asia Pacific and Other Americas [Member]
Net sales
Total net sales									$ 542.4	$ 737.1	$ 765.7

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- References

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