Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT SECURITIES AND OTHER SECURITIES - Narrative (Details)

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INVESTMENT SECURITIES AND OTHER SECURITIES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Sep. 30, 2023
Dec. 31, 2022
Investment Securities [Line Items]      
AFS debt security charge-off $ 4    
Asset Pledged as Collateral      
Investment Securities [Line Items]      
Investment securities pledged   $ 32,600 $ 26,900