INCOME TAXES - Components of Deferred Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Deferred tax assets:
Net operating losses	$ 79.5		$ 87.8
Interest carryforward	74.9		81.4
Capital loss carryforward	4.2		53.5
Tax credits	47.3		64.6
Employee benefits	14.4		17.9
Research and development costs	30.5		33.2
Accrued liabilities	5.3		6.4
Outside basis difference - Graphics business	22.5	$ 22.5	0.0
Other	32.7		40.0
Total gross deferred tax assets	311.3		384.8
Valuation allowances	(69.5)		(143.6)
Total deferred tax assets	241.8		241.2
Deferred tax liabilities:
Intangible assets	130.6		154.5
Property, plant and equipment	26.7		33.2
Undistributed foreign earnings	32.9		32.3
Goodwill	12.2		9.6
Total deferred tax liabilities	202.4		229.6
Net deferred tax asset (liability)	$ 39.4		$ 11.6