FAIR VALUE OF ASSETS AND LIABILITIES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign time deposits	$ 30.4	$ 29.9
Equity method investments	550.1	426.1
Other investments	7.9	10.5
Derivative asset	1.6	5.1
Designated as Hedging Instrument | Total Return Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional value of futures contracts	343.1	279.3
Derivative asset	1.6	5.1
Derivative gain (loss) , net	26.8	39.8
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign time deposits	$ 30.4	$ 29.9