Business Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	Jan. 31, 2012	Oct. 31, 2011
Total assets by geographical area
Total assets	$ 4,065.6	$ 4,207.3	[1]
North America [Member]
Total assets by geographical area
Total assets	1,490.8	1,779.5
Europe, Middle East, and Africa [Member]
Total assets by geographical area
Total assets	1,649.5	1,750.3
Asia Pacific and Latin America [Member]
Total assets by geographical area
Total assets	$ 925.3	$ 677.5

[1] The consolidated balance sheet as of October 31, 2010 and the consolidated statements of changes in shareholders' equity as of October 31, 2009 and 2010 have been restated to correct prior period errors. The corrections did not impact total assets, consolidated net income, or cash flows of the Company. Refer to Note 19 for additional discussion.