EMPLOYEE BENEFIT PLANS - Additional Information (Details) - U.K. Plan - Pension Plan $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Weighted-average of expected returns on asset investment, percentage	2.10%
Expected contributions for current year	$ 4.1
Total contributions to date	$ 1.0
Equities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average of expected returns on asset investment, percentage	4.60%
Debt Security
Defined Benefit Plan Disclosure [Line Items]
Weighted-average of expected returns on asset investment, percentage	1.40%