INCOME TAXES - Income Tax Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Current income taxes: Federal taxes	$ 22	$ 19	$ 29	$ 40
Current income taxes: State taxes	3	1	5	3
Total current income taxes	25	20	34	43
Deferred income taxes: Federal taxes	3	4	8	3
Deferred income taxes: State taxes	0	1	0	1
Total deferred income taxes	3	5	8	4
Income taxes	$ 28	$ 25	$ 42	$ 47
Statutory tax rate	21.00%	21.00%	21.00%	21.00%
Effective tax rate	20.10%	19.70%	20.40%	19.30%