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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Deferred tax asset      
Tax loss, credit and interest carryforwards $ 238.5   $ 265.3
Compensation and employee benefits 80.1   86.0
Accruals and other reserves 25.5   33.9
Research and development capitalization 7.7   8.9
Equity investment and other securities 20.1   26.4
Other 3.0   10.9
Total deferred tax assets 374.9   431.4
Less: valuation allowance (159.0)   (214.2)
Total deferred tax assets, net of valuation allowance 215.9   217.2
Deferred tax liabilities      
Goodwill and intangibles (17.4)   (15.2)
Property, plant and equipment (144.7)   (146.9)
Unremitted earnings (7.4)   (7.4)
Long-term debt (2.4)   (2.2)
Total deferred tax liabilities (171.9)   (171.7)
Net deferred tax asset 44.0   45.5
Deferred Tax Assets, Net, Classification [Abstract]      
Non-current assets 184.8   198.4
Non-current liability (140.8) $ (155.9) (152.9)
Net deferred tax asset $ 44.0   $ 45.5