BASIS OF PRESENTATION - Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Restricted Cash
Cash and cash equivalents	$ 624.2	$ 884.3
Restricted cash	36.5	27.1
Total cash and cash equivalents and restricted cash in the statement of cash flows	660.7	911.4	$ 518.7	$ 654.4
U.S.
Restricted Cash
Cash and cash equivalents	511.0	752.3
Restricted cash	10.1	0.0
International markets.
Restricted Cash
Cash and cash equivalents	113.2	132.0
Restricted cash	$ 26.4	$ 27.1