Business Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	Jul. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Total assets by geographical area
Total assets	$ 3,913.7	$ 4,194.1	$ 3,485.8
North America [Member]
Total assets by geographical area
Total assets	1,757.1	1,779.5
Europe, Middle East, and Africa [Member]
Total assets by geographical area
Total assets	1,553.4	1,750.3
Asia Pacific and Latin America [Member]
Total assets by geographical area
Total assets	$ 603.2	$ 664.3