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SHARE-BASED COMPENSATION- Schedule of Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Total share-based compensation	$ 13.2	$ 13.2	$ 11.2
Stock appreciation rights
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Total share-based compensation	6.1	5.9	5.2
Performance shares
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Total share-based compensation	0.2	0.2	0.2
Restricted stock units
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Total share-based compensation	$ 6.9	$ 7.1	$ 5.8

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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