PENSION AND POST-RETIREMENT BENEFITS - Summary of Unrecognized Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 255.4
Prior service cost	(0.1)
Accumulated Other Comprehensive Loss, Gross	255.3
Income tax benefit	(45.0)
Portion allocated to Revlon Holdings	(0.8)
Accumulated other comprehensive loss, net	209.5
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	252.7
Prior service cost	(0.1)
Accumulated Other Comprehensive Loss, Gross	252.6	$ 253.2
Income tax benefit	(44.4)	(43.3)
Portion allocated to Revlon Holdings	(0.8)	(0.9)
Accumulated other comprehensive loss, net	207.4	209.0
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	2.7
Prior service cost	0.0
Accumulated Other Comprehensive Loss, Gross	2.7	4.5
Income tax benefit	(0.6)	(0.9)
Portion allocated to Revlon Holdings	0.0	(0.2)
Accumulated other comprehensive loss, net	$ 2.1	$ 3.4

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

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- Definition

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

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- Definition

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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