Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Reconciliation of the beginning and ending restructuring reserve balances
Balance at October 31, 2011			$ 19.6
Costs incurred and charged to expense	3.9	3.4	22.9	11.4
Costs paid or otherwise settled			(35.4)
Balance at July 31, 2012	7.1		7.1
Employee separation costs [Member]
Reconciliation of the beginning and ending restructuring reserve balances
Balance at October 31, 2011			11.8
Costs incurred and charged to expense			10.5
Costs paid or otherwise settled			(17.0)
Balance at July 31, 2012	5.3		5.3
Other restructuring costs [Member]
Reconciliation of the beginning and ending restructuring reserve balances
Balance at October 31, 2011			7.6
Costs incurred and charged to expense			7.0
Costs paid or otherwise settled			(12.8)
Balance at July 31, 2012	1.8		1.8
Asset impairments [Member]
Reconciliation of the beginning and ending restructuring reserve balances
Balance at October 31, 2011			0.2
Costs incurred and charged to expense			5.4
Costs paid or otherwise settled			$ (5.6)