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Pension And Other Post-Retirement Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Dec. 31, 2012
Other Post-Retirement Benefits [Member]
Sep. 30, 2013
Pension Benefits [Member]
Sep. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]          
Pension and other postretirement liabilities $ 86.1 $ 91.2      
Contribution to pension plans for continuing operations     0.3    
Expected required contributions         0.2
Additional discretionary contribution       $ 5.0