v3.26.1
FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Items Measured at Fair Value on a Nonrecurring Basis    
Non-marketable equity securities measured using the measurement alternative $ 7,839 $ 7,678
Nonrecurring | Level 2    
Items Measured at Fair Value on a Nonrecurring Basis    
Loans HFS 689 188
Other real estate owned 1 0
Loans 0 0
Non-marketable equity securities measured using the measurement alternative 0 0
Total assets 690 188
Nonrecurring | Level 3    
Items Measured at Fair Value on a Nonrecurring Basis    
Loans HFS 353 453
Other real estate owned 0 0
Loans 97 272
Non-marketable equity securities measured using the measurement alternative 107 350
Total assets 557 1,075
Fair value | Nonrecurring    
Items Measured at Fair Value on a Nonrecurring Basis    
Loans HFS 1,042 641
Other real estate owned 1 0
Loans 97 272
Non-marketable equity securities measured using the measurement alternative 107 350
Total assets $ 1,247 $ 1,263