BENEFIT PLANS (Components of Net Periodic Benefit Cost- Other Postretirement Benefits) (Details) - Other Postretirement Benefit Plans, Defined Benefit [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Components of Net Periodic Benefit Cost
Service cost	$ 0.5	$ 0.6
Interest cost	0.5	0.2
Amortization of prior service cost (credit)	0.4	(0.1)
Amortization of actuarial gain	(0.4)	(0.3)
Net periodic benefit cost	1.0	0.4
Pretax reclassifications from AOCI included in net periodic postretirement benefit credit	$ 0.0	$ (0.4)