v3.26.1
BUSINESS COMBINATIONS - Narrative (Veritex) (Details) - USD ($)
$ in Millions
Oct. 20, 2025
Jun. 30, 2026
Dec. 31, 2025
Business Combination [Line Items]      
Goodwill   $ 9,527 $ 5,997
Veritex Holdings, Inc.      
Business Combination [Line Items]      
Share issuance ratio 1.95    
Consideration transferred $ 1,684    
Goodwill $ 450    
Veritex Holdings, Inc. | Veritex Shareholders Common Stock      
Business Combination [Line Items]      
Shares issued (in shares) 107,000,000    
Veritex Holdings, Inc. | Conversion of Certain Veritex Equity Awards      
Business Combination [Line Items]      
Shares issued (in shares) 1,000,000