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Employee Benefit Plans - Schedule of Impact of Change in Health Care Cost (Details)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]  
Effect of one percentage point increase on service and interest cost components $ 0.1
Effect of one percentage point decrease on service and interest cost components (0.1)
Effect of one percentage point increase on postretirement welfare benefit obligation 0.9
Effect of one percentage point decrease on postretirement welfare benefit obligation $ (1.2)