BENEFIT PLANS (Employer Contributions for Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 5.2	$ 4.9	$ 5.5
2024 (estimated)	5.1
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	7.4	$ 7.8	$ 8.0
2024 (estimated)	$ 9.4