SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Weighted-Average Common Shares Outstanding Assuming Dilution) (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Weighted-average common shares outstanding	133.0	133.0	133.1	133.0
Dilutive effect of Stock-Only Stock Appreciation Rights	0.2	0.2	0.2	0.2
Dilutive effect of Other stock compensation awards	0.5	0.4	0.4	0.4
Weighted-average common shares outstanding, assuming dilution	133.7	133.6	133.7	133.6