EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	$ 6.6	$ 6.8	$ 15.4	$ 13.6
Royalty and interest income	1.6	1.5	3.2	3.1
Equity, royalty and interest income from investees	8.2	8.3	18.6	16.7
Fleetguard Filters Pvt. Ltd.
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	4.6	5.0	12.2	10.8
Shanghai Fleetguard Filter Co. Ltd
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	1.9	1.7	3.0	2.6
Filtrum Fibretechnologies Pvt. Ltd
Schedule of Equity Method Investments [Line Items]
Atmus share of net income	$ 0.1	$ 0.1	$ 0.2	$ 0.2