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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Deferred Tax Assets, Net [Abstract]    
Other non-current assets $ 18.6 $ 20.8
Other non-current liabilities (3.5) (4.2)
Net deferred tax assets 15.1 16.6
Deferred tax assets    
Pension benefits 7.7 10.9
Tax loss and credit carry forwards 20.7 24.8
Other 5.2 1.6
Total deferred tax assets 33.6 37.3
Valuation allowances (15.0) (15.0)
Valuation allowances 18.6 22.3
Deferred tax liabilities    
Property, plant and equipment 3.5 5.7
Total deferred tax liabilities $ 3.5 $ 5.7