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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Deferred Tax Assets, Net [Abstract]    
Deferred tax assets $ 15.8 $ 18.6
Deferred tax liabilities (2.5) (3.5)
Net deferred tax assets 13.3 15.1
Deferred tax assets    
Pension benefits 5.8 7.7
Tax loss and credit carry forwards 23.8 20.7
Other 3.5 5.2
Total deferred tax assets 33.1 33.6
Valuation allowances (16.2) (15.0)
Deferred tax assets, net of valuation allowances 16.9 18.6
Deferred tax liabilities    
Property, plant and equipment 3.6 3.5
Total deferred tax liabilities $ 3.6 $ 3.5