RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($) $ in Millions	9 Months Ended	23 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 10.0
Expense, Net	44.8
Foreign Currency Translation	0.2
Cash utilized, net	(25.6)
Non-cash utilized, net	0.0
Liability Balance at period end	29.4	$ 29.4
Revlon 2020 Restructuring Plan | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	44.4
Foreign Currency Translation	0.0
Cash utilized, net	(20.3)
Non-cash utilized, net	0.0
Liability Balance at period end	24.1	24.1
Revlon 2020 Restructuring Plan | Other Costs
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	1.2
Foreign Currency Translation	0.0
Cash utilized, net	(1.2)
Non-cash utilized, net	0.0
Liability Balance at period end	0.0	0.0
Revlon 2020 Restructuring Plan | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	45.6
Foreign Currency Translation	0.0
Cash utilized, net	(21.5)
Non-cash utilized, net	0.0
Liability Balance at period end	24.1	24.1
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Expense, Net	0.1
Cash utilized, net		(30.3)
2018 Optimization Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5.7
Expense, Net	(0.6)
Foreign Currency Translation	0.0
Cash utilized, net	(3.7)
Non-cash utilized, net	0.0
Liability Balance at period end	1.4	1.4
2018 Optimization Restructuring Program | Other Costs
Restructuring Reserve [Roll Forward]
Expense, Net	0.0
2018 Optimization Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Expense, Net	(0.6)
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.3
Expense, Net	(0.2)
Foreign Currency Translation	0.2
Cash utilized, net	(0.4)
Non-cash utilized, net	0.0
Liability Balance at period end	$ 3.9	$ 3.9