Acquisitions, Divestitures and Other Significant Transactions - Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		6 Months Ended	12 Months Ended
Apr. 30, 2014 Acquisition	Apr. 30, 2013 Acquisition	Oct. 31, 2013	Apr. 30, 2014 Total 2014 Acquisitions [Member] Acquisition	Oct. 31, 2013 Total 2013 Acquisitions [[Member] Acquisition
Business Acquisition [Line Items]
Number of acquisitions	2	0		2
Purchase Price, net of Cash	$ 52.3			$ 52.3
Tangible Assets, net				2.1
Intangible Assets				14.0
Goodwill	$ 1,028.0		$ 1,003.5	$ 34.4

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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- Definition

The number of businesses acquired by the entity during the period.

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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