BENEFIT PLANS (Employer Contributions for Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 5.5	$ 4.7	$ 5.0
2022 (estimated)	4.6
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	8.0	$ 8.8	$ 8.9
2022 (estimated)	$ 8.2