EMPLOYEE BENEFITS - AMOUNTS RECOGNIZED ON THE BALANCE SHEETS (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Pension and OPEB assets	$ 282.1	$ 260.7
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension and OPEB assets	129.5	92.9
Other long-term liabilities	5.1	6.6
Total net assets	124.4	86.3
OPEB Benefits
Defined Benefit Plan Disclosure [Line Items]
Pension and OPEB assets	152.6	167.8
Other long-term liabilities	9.2	11.1
Total net assets	$ 143.4	$ 156.7