COMMITMENTS AND CONTINGENCIES - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Dec. 31, 2023	Aug. 12, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Cash and cash equivalents	$ 550.2	$ 391.4	$ 307.4
Professional fee escrow	0.2		0.0
Bank collateral guarantees	32.5		2.6
Pension collateral guarantees	9.4		9.1
Restricted cash and cash equivalents	42.1		11.7
Total cash, cash equivalents, and restricted cash	$ 592.3	$ 452.2	$ 319.1	$ 388.9	$ 324.5