v3.25.2
INVESTMENT SECURITIES - Schedule of Amortized Cost and Fair Value of Securities Held to Maturity (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Investment Securities Held To Maturity [Line Items]    
Amortized Cost $ 4,115 $ 3,979
Gross Unrealized Gains 16 3
Gross Unrealized Losses (274) (338)
Fair  Value 3,857 3,644
U.S. Treasury    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 1 1
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair  Value 1 1
U.S. GSE    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 30 29
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair  Value 30 29
Agency MBS    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 826 901
Gross Unrealized Gains 2 1
Gross Unrealized Losses (69) (96)
Fair  Value 759 806
Agency CMO    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 664 714
Gross Unrealized Gains 0 0
Gross Unrealized Losses (74) (95)
Fair  Value 590 619
Agency commercial MBS    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 1,597 1,326
Gross Unrealized Gains 14 2
Gross Unrealized Losses (25) (44)
Fair  Value 1,586 1,284
States of the U.S. and political subdivisions (municipals)    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 985 992
Gross Unrealized Gains 0 0
Gross Unrealized Losses (105) (103)
Fair  Value 880 889
Other debt securities    
Investment Securities Held To Maturity [Line Items]    
Amortized Cost 12 16
Gross Unrealized Gains 0 0
Gross Unrealized Losses (1) 0
Fair  Value $ 11 $ 16