RESTRUCTURING CHARGES - Restructuring and Related Charges Activity (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Restructuring Reserve [Roll Forward]
Charges incurred during period	$ 5.4
Revlon 2020 Restructuring Plan
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	68.8
Charges incurred during period	7.3
Charges incurred through end of period	76.1
Revlon 2020 Restructuring Plan | Employee Severance and Other Personnel Benefits
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	48.6
Charges incurred during period	1.9
Charges incurred through end of period	50.5
Revlon 2020 Restructuring Plan | Other Costs
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	1.9
Charges incurred during period	3.5
Charges incurred through end of period	5.4
Revlon 2020 Restructuring Plan | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	50.5
Charges incurred during period	5.4
Charges incurred through end of period	55.9
Revlon 2020 Restructuring Plan | Leases
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	12.6
Charges incurred during period	1.3
Charges incurred through end of period	13.9
Revlon 2020 Restructuring Plan | Other Related Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	5.7
Charges incurred during period	0.6
Charges incurred through end of period	$ 6.3