LOW-INCOME HOUSING TAX CREDIT INVESTMENT (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Investments [Line Items]
Unfunded commitments	$ 0.2		$ 0.2		$ 2.2
Tax credits and other benefits	0.1	$ 0.0	0.3	$ 0.0
Impairment losses	0.0	0.0	0.0	0.0
Other Assets [Member]
Schedule of Investments [Line Items]
Investment balance	2.8		2.8		$ 1.1
Income Tax Expense (Benefit)
Schedule of Investments [Line Items]
Amortization expense	$ 0.1	$ 0.0	$ 0.3	$ 0.0