OTHER LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Compensation and benefits	$ 98.3	$ 87.8
Accrued bonus and deferred compensation	802.1	773.0
Accrued compensation and benefits	900.4	860.8
Accruals and other liabilities	567.5	606.5
Lease liability (See Note 14)	433.7	480.2
Accounts payable	31.5	59.6
Unsettled funds payable	151.2	79.4
Income taxes payable	110.5	89.1
Accounts payable and accrued expenses	$ 1,294.4	$ 1,314.8