FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Items Measured at Fair Value on a Nonrecurring Basis
Non-marketable equity securities measured using the measurement alternative	$ 8,040	$ 7,337
Nonrecurring | Level 2
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	457	986
Other real estate owned	0	0
Loans	0	0
Non-marketable equity securities measured using the measurement alternative	0	104
Total assets	457	1,090
Nonrecurring | Level 3
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	1,879	1,312
Other real estate owned	1	11
Loans	69	144
Non-marketable equity securities measured using the measurement alternative	597	551
Total assets	2,546	2,018
Fair value | Nonrecurring
Items Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale	2,336	2,298
Other real estate owned	1	11
Loans	69	144
Non-marketable equity securities measured using the measurement alternative	597	655
Total assets	$ 3,003	$ 3,108