PENSION, POST-RETIREMENT AND POST-EMPLOYMENT PLANS - Amounts Recognized in Balance Sheet and Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Balance Sheet
Pension and post-retirement benefits	$ 22.2	$ 28.1
Domestic | Pension and SERP Benefits
Balance Sheet
Other assets	7.4	0.0
Accrued expenses and other current liabilities	0.7	0.9
Pension and post-retirement benefits	4.4	7.3
Accumulated Other Comprehensive Loss
Net actuarial (loss) gain	(0.6)	(7.4)
Domestic | Post-retirement Medical Benefits
Balance Sheet
Other assets	0.0	0.0
Accrued expenses and other current liabilities	0.5	0.5
Pension and post-retirement benefits	4.7	4.9
Accumulated Other Comprehensive Loss
Net actuarial (loss) gain	2.0	2.1
Foreign | Pension and SERP Benefits
Balance Sheet
Other assets	0.0	0.0
Accrued expenses and other current liabilities	0.8	0.8
Pension and post-retirement benefits	12.1	14.0
Accumulated Other Comprehensive Loss
Net actuarial (loss) gain	$ 1.5	$ 1.4