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Pension and Other Post-Retirement Benefits (Details 1) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]    
Projected benefit obligations $ 430.8 $ 438.3
Fair value of plan assets 378.8 378.6
Pension plans with an accumulated benefit obligation in excess of plan assets    
Accumulated benefit obligations 126.4 412.6
Fair value of plan assets $ 94.4 $ 378.6