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Retirement Plans and Postretirement Health Care and Life Insurance Benefits (Details 1) (Other Postretirement Benefit 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
Other Postretirement Benefit Plans, Defined Benefit [Member]
       
Components of net periodic cost for the postretirement benefits        
Service cost            
Interest cost 0.3 0.3 0.9 0.9
Amortization of prior service cost and recognized actuarial gain (0.4) (0.4) (1.2) (1.2)
Net periodic pension costs $ (0.1) $ (0.1) $ (0.3) $ (0.3)