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Retirement and Postretirement Plans (Periodic Benefit Cost) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of net periodic benefit cost (income)      
Service cost $ 0.8 $ 0.7 $ 0.8
Interest cost 4.2 4.7 5.2
Expected return on plan assets (7.1) (6.9) (7.6)
Amortization of unrecognized loss 0.9 0.8 0.5
Net periodic pension income before settlements, curtailments and special termination benefits (1.2) (0.7) (1.1)
Settlement loss 0 0.6 0.5
Special termination benefits expense 0.3 [1] 0.6 [1] 0.8 [1]
Total net periodic benefit (income) cost $ (0.9) $ 0.5 $ 0.2
Pension Plan, Defined Benefit [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Discount Yield (as a percent) 4.66% 3.64%  
Weighted average discount rate assumptions used to determine benefit obligations      
Discount rate (as a percent) 3.64%    
Pension Costs [Member]
      
Weighted average discount rate assumptions used to determine benefit obligations      
Discount rate (as a percent)   4.38%  
Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield 5.75% 5.75%  
[1] Special termination benefits represent additional payments made from the Qualified Plan to certain vested participants when their employment was terminated due to a reduction in force.