Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Reconciliation of the beginning and ending restructuring reserve balances
Balance at October 31, 2011			$ 19.6
Costs incurred and charged to expense	10.1	5.0	19.0	8.0
Costs paid or otherwise settled			(29.8)
Balance at April 30, 2012	8.8		8.8
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			8.2
Costs paid or otherwise settled			(13.8)
Balance at April 30, 2012	6.2		6.2
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			5.9
Costs paid or otherwise settled			(10.9)
Balance at April 30, 2012	2.6		2.6
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			4.9
Costs paid or otherwise settled			$ (5.1)