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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Capital expenditures incurred but not yet paid $ 7.8 $ 8.2  
Other Current Assets [Member]      
Restricted Cash 0.7   $ 0.9
Other Assets [Member]      
Restricted Cash $ 6.8   $ 6.9