SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Carrying amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2.1	$ 2.1	$ 0.0
Additions	120.4	0.0	2.1
Goodwill, ending balance	$ 122.5	$ 2.1	$ 2.1