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LOANS AND LEASES - Loans to Related Parties (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
Financing Receivable, Excluding Accrued Interest [Roll Forward]  
Balance at Beginning of Year $ 30,255 [1]
Balance at End of Year 32,323 [1]
Related Party  
Financing Receivable, Excluding Accrued Interest [Roll Forward]  
Balance at Beginning of Year 13
New loans 8
Repayments (10)
Other 1
Balance at End of Year $ 12
[1] Amount represents loans for which we have elected the fair value option. See Note 26.