INCOME TAXES - SCHEDULE OF COMPONENTS OF INCOME TAX EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Current tax expense (benefit)									$ 31.8	$ 64.1	$ (24.0)
Deferred tax expense									88.7	62.6	100.5
Income tax expense calculated based on annual effective tax rate									120.5	126.7	76.5
Income tax expense on discrete items:
Carryback of net operating losses to years with a higher statutory corporate rate pursuant to provisions of the CARES Act (as defined below)									0.0	0.0	(34.0)
Total income tax expense	$ 12.0	$ 32.2	$ 39.3	$ 37.0	$ 32.3	$ 28.2	$ 23.6	$ 42.6	$ 120.5	$ 126.7	$ 42.5