Acquisitions, Divestitures and Other Significant Transactions - Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended	12 Months Ended
	Jan. 31, 2014 Acquisition	Jan. 31, 2013 Acquisition	Oct. 31, 2013	Jan. 31, 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				2.5
Intangible Assets				13.8
Goodwill	$ 1,028.9		$ 1,003.5	$ 34.2