SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Weighted-Average Common Shares Outstanding Assuming Dilution) (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Weighted-average common shares outstanding	133.0	132.8	133.0	132.8
Dilutive effect of Stock-Only Stock Appreciation Rights	0.2	0.3	0.2	0.3
Dilutive effect of Other stock compensation awards	0.3	0.4	0.4	0.4
Weighted-average common shares outstanding, assuming dilution	133.5	133.5	133.6	133.5