INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
U.S. federal statutory tax rate	21.00%	21.00%	21.00%
Taxes computed at U.S. statutory rate	$ 60.4	$ 27.1	$ 57.1
State income taxes, net of federal benefit	3.5	1.8	4.6
Section 250 deduction	(10.5)	(10.8)	0.0
Foreign tax credits	(13.2)	(8.2)	0.0
Change in valuation allowances	(67.3)	(0.1)	6.4
Tax on undistributed foreign earnings	0.8	5.1	5.9
Changes in uncertain tax positions	6.5	1.9	0.2
Non-deductible goodwill impairment and Kuprion Acquisition research and development charge	0.9	20.6	0.0
Impact of amended U.S. tax returns	12.1	(37.3)	0.0
Outside basis difference - Graphics business	(22.5)	0.0	0.0
Gain on Graphics restructuring	43.6	0.0	0.0
Rate changes	6.3	0.0	0.0
Other, net	(0.8)	(1.9)	(4.6)
Income tax expense	$ 44.8	$ 13.0	$ 85.8
Effective tax rate	16.00%	10.00%	32.00%
Domestic
Income Taxes
Tax on foreign operations	$ 4.2	$ 1.8	$ 3.2
Foreign
Income Taxes
Tax on foreign operations	$ 20.8	$ 13.0	$ 13.0