LEASES - COMPONENTS OF LEASE COST (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of Lease Cost
Operating lease cost	$ 151.0	$ 162.2	$ 110.7
Short-term lease cost	7.7	0.6	3.1
Variable lease cost	0.6	0.8	0.6
Total lease cost	$ 159.3	$ 163.6	$ 114.4