INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Line Items]
Provision for income taxes		$ 158.8	$ 0.2
Increase in provision from income taxes		$ 158.6
Valuation allowance assumption, period of taxable loss		3 years
Increase (decrease) in deferred tax valuation allowance	$ 189.5	$ 206.1	(2.4)
Tax loss carryforwards	969.3	969.3
Tax loss carryforwards - expiring 2021	2.5	2.5
Tax loss carryforwards - expiring 2022	1.9	1.9
Tax loss carryforwards - expiring 2023 and beyond	642.9	642.9
Tax loss carryforwards - no expiration	321.9	321.9
Unrecognized tax benefits	84.4	84.4	78.0	$ 74.7
Income tax penalties and interest accrued	15.6	15.6	11.7	$ 9.8
Unrecognized tax benefits that would impact effective tax rate	53.5	53.5
Tax deferred expense	30.9	30.9
Unrecognized tax benefits, expense recognized		3.9	1.9
Decrease in unrecognized tax benefits in 2021	3.6	3.6
Tax Payment | MacAndrews & Forbes
Income Tax Disclosure [Line Items]
Payments to related party		$ 0.1
Foreign
Income Tax Disclosure [Line Items]
Period of cumulative losses		3 years
Tax loss carryforwards	277.1	$ 277.1
Domestic
Income Tax Disclosure [Line Items]
Tax loss carryforwards	$ 692.2	692.2
Revlon Consumer Products Corporation
Income Tax Disclosure [Line Items]
Provision for income taxes		140.5	$ 1.6
Increase in provision from income taxes		$ 138.9