PENSION AND POSTRETIREMENT BENEFITS (Defined Benefit Pension Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan expenses recognized	$ 5.5	$ 4.3	$ 1.4
Unfunded status of defined benefit plan	(4.1)	(6.4)
Accumulated Other Comprehensive (Loss)/ Income
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	3.8	(1.3)
Other noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Unfunded status of defined benefit plan	1.2	0.0
Accrued compensation and benefits expenses
Defined Benefit Plan Disclosure [Line Items]
Unfunded status of defined benefit plan	(0.6)	(1.0)
Other noncurrent liabilities
Defined Benefit Plan Disclosure [Line Items]
Unfunded status of defined benefit plan	$ (3.5)	$ (5.4)