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Debt Long term debt, maturities (Tables)
 12 Months Ended
Dec. 31, 2015
Long-term Debt Disclosure [Abstract]  
Schedule of Maturities of Long-term Debt [Table Text Block]
 
Years Ending December 31,
(in millions)
2016
$
5.3

2017
6.7

2018
6.2

Total
$
18.2