Retirement Plans and Postretirement Health Care and Life Insurance Benefits (Details) (Pension Plans, Defined Benefit [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Pension Plans, Defined Benefit [Member]
Components of net periodic pension cost
Service cost	$ 3.4	$ 3.1	$ 10.2	$ 9.3
Interest cost	7.4	7.4	22.2	22.2
Expected return on plan assets	(8.5)	(9.1)	(25.5)	(27.3)
Amortization of prior service cost, initial net asset and net actuarial gain	3.2	2.5	9.6	7.5
Net periodic pension costs	$ 5.5	$ 3.9	$ 16.5	$ 11.7