Income Taxes (as restated) - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Net operating losses and capital losses	$ 156.0	$ 131.7
Accrued liabilities	44.9	30.0
Employee compensation and benefits	10.1	13.7
Pensions	14.8	13.3
Business interest deduction limitation	80.7	98.9
Inventory	21.8	20.4
R&D credit carryforward	8.8	6.6
Lease liability	13.7	19.8
Bad debts	7.5	6.3
Foreign tax credit carryforward	7.6	0.0
Other	0.4	0.3
Total deferred tax assets, before valuation allowances	366.3	341.0
Valuation allowances	(274.7)	(205.7)
Deferred tax assets, net of valuation allowances	91.6	135.3
Deferred tax liabilities
Intangibles & Goodwill	(95.5)	(106.9)
Undistributed foreign earnings	(38.0)	(45.1)
Property, plant & equipment	(30.6)	(31.2)
Debt issuance costs	(3.2)	(46.1)
Lease Right of Use Asset	(12.1)	(18.8)
Other	(7.8)	(2.9)
Total deferred tax liabilities	(187.2)	(251.0)
Net deferred income tax liabilities	$ (95.6)	$ (115.7)