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Pension Plans and Other Postretirement Benefits (Details 14) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Pension Benefits [Member]
 
Defined Benefit Plan Expected Future Benefit Payments [Abstract]  
2014 $ 190.5
2015 190.3
2016 190.8
2017 191.0
2018 191.6
2019-2023 958.8
Other Postretirement Benefits [Member]
 
Defined Benefit Plan Expected Future Benefit Payments [Abstract]  
2014 65.5
2015 52.9
2016 49.5
2017 47.1
2018 44.7
2019-2023 184.4
Medicare Part D Subsidy [Abstract]  
2014 1.3
2015 1.3
2016 1.3
2017 1.3
2018 1.2
2019-2023 $ 5.4