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Restructuring Actions Restructuring Actions (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve, beginning balance $ 0.5 $ 0.9
Charges 0 30.7
Cash utilization (0.3) (24.9)
Non-cash utilization 0 (5.8)
Accrual adjustments 0 (0.4)
Restructuring reserve, ending balance 0.2 0.5
One-time Termination Benefits [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve, beginning balance 0 0.3
Charges 0 1.7
Cash utilization 0 (1.6)
Non-cash utilization 0 0
Accrual adjustments 0 (0.4)
Restructuring reserve, ending balance 0 0
Asset Impairment Charges [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve, beginning balance 0 0
Cash utilization 0 0
Impairment of Long-Lived Assets to be Disposed of 0 5.8
Non-cash utilization 0 (5.8)
Accrual adjustments 0 0
Restructuring reserve, ending balance 0 0
Environmental Restoration Costs [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve, beginning balance 0.5 0.6
Asset Retirement Obligation, Liabilities Incurred 0 0
Asset Retirement Obligation, Cash Paid to Settle 0.3 0.1
Non-cash utilization 0 0
Asset Retirement Obligation, Revision of Estimate 0 0
Restructuring reserve, ending balance 0.2 0.5
Other Restructuring [Member]
    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve, beginning balance 0 0
Charges 0  
Cash utilization 0 (23.2)
Non-cash utilization 0 0
Accrual adjustments 0 0
Restructuring reserve, ending balance 0 0
Other Restructuring Costs   $ 23.2