INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Estimated effect on income taxes payable if permanently reinvested foreign earnings were repatriated	$ 2.0
Payroll tax deferral, CARES Act	14.7
Payroll tax credit, CARES Act	0.7
Unrecognized tax benefits and related interest and penalties, all of which would affect our effective tax rate if recognized	$ 42.9
Unrecognized tax benefits estimated impact on effective tax rate if recognized in current year (percent)	4.20%
Expected decrease in unrecognized tax benefits in next twelve months due to lapsing statutes	$ 5.9
Interest and penalties recognized	0.9	$ 1.0	$ 1.0
Interest and penalties accrued	5.6	6.1
Foreign net operating loss carryforwards tax effect	8.6	11.0
Foreign operating loss carryforwards
Income Taxes [Line Items]
Valuation allowance against deferred tax asset	$ 2.5	$ 7.6