DEPOSITS (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Deposit Liability [Line Items]
Non-interest-bearing deposits in U.S. offices	$ 112,535	$ 112,089
Interest-bearing deposits in U.S. offices (including $1,243 and $1,309 as of March 31, 2024 and December 31, 2023, respectively, at fair value)	570,259	576,784
Total deposits in U.S. offices	682,794	688,873
Non-interest-bearing deposits in offices outside the U.S.	87,936	88,988
Interest-bearing deposits in offices outside the U.S. (including $1,662 and $1,131 as of March 31, 2024 and December 31, 2023, respectively, at fair value)	536,433	530,820
Total deposits in offices outside the U.S.	624,369	619,808
Total deposits	1,307,163	1,308,681
Fair value
Deposit Liability [Line Items]
Interest-bearing deposits in U.S. offices (including $1,243 and $1,309 as of March 31, 2024 and December 31, 2023, respectively, at fair value)	1,243	1,309
Interest-bearing deposits in offices outside the U.S. (including $1,662 and $1,131 as of March 31, 2024 and December 31, 2023, respectively, at fair value)	1,662	1,131
Total deposits	$ 1,304,100	$ 1,305,900