Comprehensive Income and Shareholders Equity (Details) (USD $) In Millions, unless otherwise specified	2 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
	Oct. 01, 2011	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011	Oct. 31, 2010
Components of comprehensive income
Net income		$ 41.7	$ 39.2	$ 26.0	$ 68.9	$ 107.0	$ 159.8	$ 180.6	$ 212.3
Other comprehensive income:
Foreign currency translation adjustment	19.6	(61.1)			(23.5)	(46.2)	0.2		24.7
Changes in fair value of interest rate and other derivatives, net of tax		(0.6)			0.3	(0.8)	1.1
Minimum pension liabilities adjustment, net of tax		1.1			0.1	4.9	(0.8)
Comprehensive income		$ (18.9)			$ 45.8	$ 64.9	$ 160.3