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BORROWED FUNDS - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Borrowed Funds [Line Items]    
FHLB, amount of available, unused funds $ 1,679 $ 1,478
Asset Pledged as Collateral    
Borrowed Funds [Line Items]    
Amount of loans collateralized. $ 3,651  
Minimum    
Borrowed Funds [Line Items]    
FHLB interest rate 4.55%  
Maximum    
Borrowed Funds [Line Items]    
FHLB interest rate 4.58%