RELATED PERSON TRANSACTIONS - Transactions With Our Controlling Shareholders (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related person transactions
Lease payments	$ 7.0	$ 6.0	$ 5.0
Finance leases payable related to the aforementioned relationships	32.0
Finance lease payable, interest	5.0
Equity method investments	128.0	113.0
Related Party
Related person transactions
Lease payments	6.0	6.0	5.0
Finance leases payable related to the aforementioned relationships	7.0	9.0
Finance lease payable, interest	1.0	1.0
Equity method investments	22.0
Charter Aircraft
Related person transactions
Amounts of transaction	$ 0.2	$ 0.4	$ 1.0

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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