Restructuring Charges (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011
Restructuring and Related Cost (Textual) [Abstract]
Restructuring charges	$ 3.9	$ 3.4	$ 22.9	$ 11.4
Restructuring cost incurred			30.0		10.4
Employee separation costs [Member]
Restructuring and Related Cost (Textual) [Abstract]
Restructuring charges			10.5
Restructuring cost incurred	2.3		10.5
Asset impairments [Member]
Restructuring and Related Cost (Textual) [Abstract]
Restructuring charges			5.4
Restructuring cost incurred	0.5		5.4
Other restructuring costs [Member]
Restructuring and Related Cost (Textual) [Abstract]
Restructuring charges			7.0
Restructuring cost incurred	$ 1.1		$ 7.0