INVESTMENT SECURITIES - Contractual Maturities (Details) $ in Millions	Dec. 31, 2024 USD ($)
Amortized cost
Within one year	$ 814
After one year through five years	4,003
After five years through ten years	5,160
After ten years	25,039
Estimated fair value
Within one year	814
After one year through five years	4,065
After five years through ten years	5,160
After ten years	$ 22,607