Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Loans held for sale $ 601   $ 601   $ 520
Nonrecurring Basis | Total Gains/(Losses)          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Collateral-dependent loans, gains (losses) 6 $ 0 13 $ (1)  
Loans held for sale, gains (losses) 0 $ 1 0 $ 1  
Nonrecurring Basis | Level 3 | Fair Value          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Collateral-dependent loans 24   24   16
Loans held for sale $ 0   $ 0   $ 0