REVENUE RECOGNITION - Rollforward of deferred revenue (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)
Revenue recognized from contract liabilities and remaining balance
Beginning Balance	$ 6.1
Cash Additions	24.7
Revenue Recognized	(24.2)
Ending Balance	6.6
Liquidity provider sliding scale
Revenue recognized from contract liabilities and remaining balance
Beginning Balance	0.0
Cash Additions	9.6
Revenue Recognized	(7.2)
Ending Balance	2.4
Other, net
Revenue recognized from contract liabilities and remaining balance
Beginning Balance	6.1
Cash Additions	15.1
Revenue Recognized	(17.0)
Ending Balance	$ 4.2