PENSION, POST-RETIREMENT AND POST-EMPLOYMENT PLANS - Amounts Recognized in Balance Sheet and Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Balance Sheet
Pension and post-retirement benefits	$ 28.1	$ 36.7
Domestic | Pension and SERP Benefits
Balance Sheet
Accrued expenses and other current liabilities	0.9	0.6
Pension and post-retirement benefits	7.3	15.9
Accumulated Other Comprehensive Loss
Net actuarial (loss) gain	(7.4)	(13.1)
Domestic | Post-retirement Medical Benefits
Balance Sheet
Accrued expenses and other current liabilities	0.5	0.5
Pension and post-retirement benefits	4.9	5.4
Accumulated Other Comprehensive Loss
Net actuarial (loss) gain	2.1	2.1
Foreign | Pension and SERP Benefits
Balance Sheet
Accrued expenses and other current liabilities	0.8	0.9
Pension and post-retirement benefits	14.0	13.6
Accumulated Other Comprehensive Loss
Net actuarial (loss) gain	$ 1.4	$ 2.5