LOANS AND LEASES - Schedule of Loans Pledged as Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
FHLB of Atlanta
Pledged non-PCD loans	$ 141,269	$ 140,221	$ 139,341
FHLB of Atlanta \| Non-PCD \| Asset Pledged as Collateral
FHLB of Atlanta
Lendable collateral value of pledged non-PCD loans	18,552	17,873
Less: advances	0	0
Less: letters of credit	700	1,450
Available borrowing capacity	17,852	16,423
Pledged non-PCD loans	30,835	30,421
FRB \| Non-PCD \| Asset Pledged as Collateral
FHLB of Atlanta
Pledged non-PCD loans	12,026	6,309
FRB
Lendable collateral value of pledged non-PCD loans	10,561	5,475
Less: advances	0	0
Available borrowing capacity	10,561	5,475
FDIC \| Asset Pledged as Collateral
FHLB of Atlanta
Pledged non-PCD loans	36,711	41,040
FDIC
Lendable collateral value of pledged loans	36,711	41,282
Less: advances	0	0
Less: Purchase Money Note	35,991	35,991
Available borrowing capacity	$ 0	$ 5,291

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