INCOME TAXES - OPERATING LOSS AND TAX CREDIT CARRYFORWARDS (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Loss and Tax Credit Carryforwards
Valuation allowances	$ 5.3	$ 7.4
Operating loss carryforwards, not expected to benefit the entity	152.3
Income tax receivables, net	125.2	170.8
U.S. Federal Income Tax
Operating Loss and Tax Credit Carryforwards
Net operating losses carryforwards		0.8
Income tax receivables, net	118.6
State Income Tax
Operating Loss and Tax Credit Carryforwards
Net operating losses carryforwards	152.3	157.9
Alternative minimum tax credit carryforwards	$ 7.3	$ 8.6