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INCOME TAXES - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
State operating loss carryforwards $ 812,000,000    
Deferred tax asset valuation allowance 103,000,000 $ 98,000,000  
Decrease in deferred tax asset valuation allowance 5,000,000    
Unrecognized tax benefits that would impact effective tax rate 7,000,000    
Interest on unrecognized tax benefits accrued (released) during period 1,000,000    
Accrued interest on unrecognized tax benefits 0 0 $ 1,000,000
Penalties accrued income tax examination 0 0 0
Penalties expense income tax examination 0 $ 0 $ 0
Tax Years Ended Prior to 1988      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]      
Base year loan loss reserves attributable to prior years $ 557,000,000