PENSION AND POST-RETIREMENT BENEFITS - Summary of Unrecognized Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 258.6	$ 311.7
Prior service cost	1.9	0.9
Accumulated Other Comprehensive Loss, Gross	260.5	312.6
Income tax benefit	(51.4)
Portion allocated (to) from Revlon Holdings	(0.5)
Accumulated other comprehensive loss, net	208.6
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	255.7	306.6
Prior service cost	1.9	0.9
Accumulated Other Comprehensive Loss, Gross	257.6	307.5
Income tax benefit	(50.3)	(50.6)
Portion allocated (to) from Revlon Holdings	(0.9)	(0.8)
Accumulated other comprehensive loss, net	206.4	256.1
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	2.9	5.1
Prior service cost	0.0	0.0
Accumulated Other Comprehensive Loss, Gross	2.9	5.1
Income tax benefit	(1.1)	(0.9)
Portion allocated (to) from Revlon Holdings	0.4	0.2
Accumulated other comprehensive loss, net	$ 2.2	$ 4.4

Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Tax

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Defined Benefit Plan Accumulated Other Comprehensive Income Loss After Tax Portion Attributable To Related Party

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Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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