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Employee Retirement Plans and Postretirement Benefits Expected Benefit Payments (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Pension
 
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Low End of Range $ 20
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, High End of Range 40
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2014 207.1
2015 211.3
2016 215.4
2017 218.7
2018 221.7
2019-2023 1,226.4
OPEB
 
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Low End of Range 10
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]  
2014 8.6
2015 8.4
2016 8.8
2017 9.2
2018 9.4
2019-2023 $ 57.3