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Other Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Other Assets [Abstract]    
Capitalized software costs, net of accumulated amortization $ 4.4 $ 2.5
Business tax credits, including VAT and ICMS (net of $11.5 million and $9.9 million reserve as of December 31, 2016 and 2015, respectively) 2.5 2.6
Grantor trust assets 10.3 9.6
Other assets 4.3 2.6
Inventory, Noncurrent 6.0 5.0
Total 27.5 22.3
Additional Information    
Reserve for losses on business tax credits $ 11.5 $ 9.9