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Leases - Lease Cost Finance And Operating Leases (Parenthetical) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Short-term Lease, Cost $ 0.2 $ 0.4
General and Administrative Expense [Member]    
Variable Lease, Cost 0.5 1.0
Cost of Sales [Member]    
Variable Lease, Cost $ 0.2 $ 0.5