PENSION AND POST-RETIREMENT BENEFITS - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Net periodic benefit (income) costs:
Net periodic benefit (income) costs	$ 0.8	$ (0.1)	$ 1.9	$ (0.5)	$ 0.6
Cost of sales
Net periodic benefit (income) costs:
Net periodic benefit (income) costs	(2.5)	(0.6)	(0.8)	(1.9)
Selling, general and administrative expense
Net periodic benefit (income) costs:
Net periodic benefit (income) costs	3.3	0.5	2.7	1.4
Pension Plans
Net periodic benefit (income) costs:
Service cost	0.6	0.1	1.9	0.4
Interest cost	4.9	5.2	14.7	15.5
Expected return on plan assets	(7.1)	(7.7)	(21.4)	(23.3)
Amortization of actuarial loss	2.3	2.2	7.1	6.6
Curtailment gain			(0.8)	0.0
Net periodic benefit (income) costs, before allocation			1.5	(0.8)
Portion allocated to Revlon Holdings			(0.1)	(0.1)
Net periodic benefit (income) costs	0.7	(0.2)	1.4	(0.9)
Other Post-Retirement Benefit Plans
Net periodic benefit (income) costs:
Service cost	0.0	0.0	0.0	0.0
Interest cost	0.1	0.1	0.3	0.3
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of actuarial loss	0.0	0.0	0.2	0.1
Curtailment gain			0.0	0.0
Net periodic benefit (income) costs, before allocation			0.5	0.4
Portion allocated to Revlon Holdings			0.0	0.0
Net periodic benefit (income) costs	$ 0.1	$ 0.1	$ 0.5	$ 0.4