EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 46.2	$ 49.2	$ 98.9	$ 84.0
Weighted-average shares for basic EPS (in shares)	83,300,000	83,300,000	83,300,000	83,300,000
Plus incremental shares from assumed conversions of long-term incentive plan shares (in shares)	0	0	0	0
Weighted-average shares for diluted EPS (in shares)	83,300,000	83,300,000	83,300,000	83,300,000
Basic earnings per share (in dollars per share)	$ 0.55	$ 0.59	$ 1.19	$ 1.01
Diluted earnings per share (in dollars per share)	$ 0.55	$ 0.59	$ 1.19	$ 1.01
Anti-dilutive shares (in shares)	0	0	0	0