SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Liabilities Under Self-Insurance Program) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Self-insured liabilities (undiscounted)	$ 151.7	$ 146.7
Insured liabilities (undiscounted)	$ 2.3	$ 2.3
Discount rate	4.56%	4.20%
Investments and long-term receivables	$ 2.3	$ 2.3
Other current liabilities	(59.6)	(51.4)
Other noncurrent liabilities	(76.1)	(81.7)
Net insurance liabilities (discounted)	$ (133.4)	$ (130.8)