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Commitments (Details)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Capital Investment Commitments [Member]  
Long-term Purchase Commitment [Line Items]  
Commitments for future capital investments $ 45.7
Research And Innovation Center Middletown OH [Member]  
Long-term Purchase Commitment [Line Items]  
Estimated cost of construction projects $ 36.0