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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 asset    
Tax loss, credit and interest carryforwards $ 245.3 $ 238.5
Compensation and employee benefits 80.8 80.1
Accruals and other reserves 17.2 25.5
Research and development capitalization 6.5 7.7
Equity investment and other securities 28.3 20.1
Finance leases 19.1 0.0
Other 3.7 3.0
Total deferred tax assets 400.9 374.9
Less: valuation allowance (178.3) (159.0)
Total deferred tax assets, net of valuation allowance 222.6 215.9
Deferred tax liabilities    
Goodwill and intangibles (20.8) (17.4)
Property, plant and equipment (147.7) (144.7)
Unremitted earnings (6.0) (7.4)
Long-term debt (1.3) (2.4)
Total deferred tax liabilities (175.8) (171.9)
Net deferred tax asset 46.8 44.0
Deferred Tax Assets, Net, Classification [Abstract]    
Non-current assets 162.3 184.8
Non-current liability (115.5) (140.8)
Net deferred tax asset $ 46.8 $ 44.0