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Employee Benefit Plans Expected Future Pension and Other Postretirement Payments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2013
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year, Description   15
Defined Benefit Plan, Expected Future Benefit Payments in Year One $ 53.0  
Defined Benefit Plan, Expected Future Benefit Payments in Year Two 54.1  
Defined Benefit Plan, Expected Future Benefit Payments in Year Three 55.5  
Defined Benefit Plan, Expected Future Benefit Payments in Year Four 56.2  
Defined Benefit Plan, Expected Future Benefit Payments in Year Five 58.4  
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter $ 306.2