INVESTMENT SECURITIES - Contractual Maturities (Details) $ in Millions	Jun. 30, 2022 USD ($)
Amortized cost
Within one year	$ 417
After one year through five years	4,062
After five years through ten years	6,083
After ten years	21,841
Estimated fair value
Within one year	418
After one year through five years	4,087
After five years through ten years	6,200
After ten years	$ 21,260