CLEARING HOUSE PERFORMANCE BONDS AND GUARANTEE FUNDS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deposit assets, interest distributed	$ 0.3	$ 0.4	$ 0.5	$ 0.6