Business Segment Information - Net Sales to External Customers by Geographical Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Net sales:
Total net sales	$ 1,048.1	$ 1,124.0	$ 1,065.5	$ 1,001.5	$ 1,094.2	$ 1,094.8	$ 1,054.7	$ 976.2	$ 4,239.1	$ 4,219.9	$ 4,129.5
United States [Member]
Net sales:
Total net sales									1,905.8	1,843.6	1,740.0
Europe, Middle East and Africa [Member]
Net sales:
Total net sales									1,596.2	1,610.6	1,634.9
Asia Pacific and Other Americas [Member]
Net sales:
Total net sales									$ 737.1	$ 765.7	$ 754.6