GENERAL AND BASIS OF PRESENTATION - Transferable production and investment tax credits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Income related to transferable production tax credits	$ 3.6	$ 2.7	$ 8.0	$ 4.5
Income related to transferable investment tax credits	$ 6.2	$ 9.0	$ 17.7	$ 10.6