DEBT AND BORROWING ARRANGEMENTS - Narrative (Details) - USD ($)		12 Months Ended
	May 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Feb. 15, 2023
Line of Credit Facility [Line Items]
Long-term debt proceeds		$ 0	$ 0	$ 650,000,000.0
Long-term debt		$ 570,000,000.0
Revolving Credit Facility | Atmus Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Long-term debt proceeds	$ 650,000,000
Basis spread on variable rate		0.10%
Borrowed amount	$ 650,000,000
Line of credit facility, maximum borrowing capacity					$ 1,000,000,000
Revolving Credit Facility | Atmus Credit Agreement | Line of Credit | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.125%
Revolving Credit Facility | Atmus Credit Agreement | Line of Credit | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
Revolving Credit Facility | Atmus Term Loan Facility | Line of Credit
Line of Credit Facility [Line Items]
Borrowed amount		$ 570,000,000.0
Line of credit facility, maximum borrowing capacity		600,000,000.0	600,000,000.0		600,000,000
Revolving Credit Facility | Atmus Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Borrowed amount		0
Line of credit facility, maximum borrowing capacity		400,000,000.0	$ 400,000,000.0		$ 400,000,000
Letters of credit outstanding		0
Revolving Credit Facility | Atmus Revolving Credit Facility | Letter of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 50,000,000