RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($) $ in Millions	12 Months Ended		26 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 10.0	$ 26.4
Expense, Net	49.7	12.8
Foreign Currency Translation	0.2	(0.2)
Cash utilized, net	(46.1)	(24.4)
Non-cash utilized, net	0.0	(4.6)
Liability Balance at period end	13.8	10.0	$ 13.8
Revlon 2020 Restructuring Plan | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	50.5
Foreign Currency Translation	0.0
Cash utilized, net	(37.9)
Non-cash utilized, net	0.0
Liability Balance at period end	12.6	0.0	12.6
Revlon 2020 Restructuring Plan | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	48.6
Foreign Currency Translation	0.0
Cash utilized, net	(36.0)
Non-cash utilized, net	0.0
Liability Balance at period end	12.6	0.0	12.6
Revlon 2020 Restructuring Plan | Other Costs
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0
Expense, Net	1.9
Foreign Currency Translation	0.0
Cash utilized, net	(1.9)
Non-cash utilized, net	0.0
Liability Balance at period end	0.0	0.0	0.0
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Expense, Net	0.2
Cash utilized, net			(30.7)
2018 Optimization Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5.7	3.7
Expense, Net		16.1
Expense, Net	(0.6)
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(4.0)	(14.1)
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	1.1	5.7	1.1
2018 Optimization Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5.7	3.7
Expense, Net		15.8
Expense, Net	(0.6)
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(4.0)	(13.8)
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	1.1	5.7	1.1
2018 Optimization Restructuring Program | Other Costs
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0	0.0
Expense, Net		0.3
Expense, Net	0.0
Foreign Currency Translation		0.0
Cash utilized, net		(0.3)
Non-cash utilized, net		0.0
Liability Balance at period end		0.0
EA Integration Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.6	17.2
Expense, Net		(1.9)
Foreign Currency Translation		(0.2)
Cash utilized, net		(8.0)
Non-cash utilized, net		(3.5)
Liability Balance at period end		3.6
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.0	13.8
Expense, Net		(1.9)
Foreign Currency Translation		(0.2)
Cash utilized, net		(7.7)
Non-cash utilized, net		0.0
Liability Balance at period end		4.0
EA Integration Restructuring Program | Other Costs
Restructuring Reserve [Roll Forward]
Liability Balance at period start	(0.4)	3.4
Expense, Net		0.0
Foreign Currency Translation		0.0
Cash utilized, net		(0.3)
Non-cash utilized, net		(3.5)
Liability Balance at period end		(0.4)
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	(4.2)
Non-cash utilized, net	0.0
Liability Balance at period end	0.1	4.3	$ 0.1
Other immaterial actions | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.7	5.5
Expense, Net		(1.4)
Foreign Currency Translation		0.0
Cash utilized, net		(2.3)
Non-cash utilized, net		(1.1)
Liability Balance at period end		0.7
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.3	4.6
Expense, Net		(1.4)
Foreign Currency Translation		0.0
Cash utilized, net		(1.8)
Non-cash utilized, net		(1.1)
Liability Balance at period end		0.3
Other immaterial actions | Other Costs
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 0.4	0.9
Expense, Net		0.0
Foreign Currency Translation		0.0
Cash utilized, net		(0.5)
Non-cash utilized, net		0.0
Liability Balance at period end		$ 0.4