INVESTMENTS (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 30, 2025	Sep. 30, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Cost and Equity Method Investments
Total equity method investments			$ 321.3	$ 1.5	$ 321.3
Total other equity investments			62.4	30.9	62.4
Total investments			383.7	32.4	383.7
Equity earnings on investments				84.2	26.5	$ 36.9
(Gain) impairment of minority investments				(5.1)	31.6	$ 1.8
Investment in 7Ridge Investments 3 LP
Schedule of Cost and Equity Method Investments
Total equity method investments			321.3	1.5	321.3
Proceeds from sale of equity method investments	$ 406.6
Investment in Japannext Co., Ltd.
Schedule of Cost and Equity Method Investments
Total other equity investments			36.5	0.0	36.5
Investment in Eris Innovations Holdings, LLC
Schedule of Cost and Equity Method Investments
Total other equity investments			9.5	9.5	9.5
Investment in CSD BR
Schedule of Cost and Equity Method Investments
Total other equity investments			5.9	10.3	5.9
Investment in Talos Global, Inc.
Schedule of Cost and Equity Method Investments
Total other equity investments			4.4	5.0	4.4
Investment in Vest Group Inc.
Schedule of Cost and Equity Method Investments
Total other equity investments			2.9	2.9	2.9
Investment in OCC
Schedule of Cost and Equity Method Investments
Total other equity investments			0.3	0.3	0.3
Other equity investments
Schedule of Cost and Equity Method Investments
Total other equity investments			2.9	$ 2.9	$ 2.9
Eris Exchange Holdings, LLC and Coin Metrics
Schedule of Cost and Equity Method Investments
(Gain) impairment of minority investments			$ 11.1
Investment in CSD BR and Talos Global Inc
Schedule of Cost and Equity Method Investments
(Gain) impairment of minority investments		$ 5.0