v3.26.1
Securities - Schedule of Gross Unrealized Losses on Investment Securities AFS (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value $ 12,327 $ 1,597
Less than 12 months, gross unrealized losses (106) (21)
12 months or longer, fair value 3,008 1,549
12 months or longer, gross unrealized losses (173) (142)
Total, fair value 15,335 3,146
Total, gross unrealized losses (279) (163)
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 1,832 205
Less than 12 months, gross unrealized losses (10) 0
12 months or longer, fair value 888 0
12 months or longer, gross unrealized losses (6) 0
Total, fair value 2,720 205
Total, gross unrealized losses (16) 0
U.S. Government agency securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 2 0
Less than 12 months, gross unrealized losses 0 0
12 months or longer, fair value 189 191
12 months or longer, gross unrealized losses (16) (15)
Total, fair value 191 191
Total, gross unrealized losses (16) (15)
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 10,226 506
Less than 12 months, gross unrealized losses (88) (1)
12 months or longer, fair value 704 876
12 months or longer, gross unrealized losses (65) (68)
Total, fair value 10,930 1,382
Total, gross unrealized losses (153) (69)
State and municipal securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 251 871
Less than 12 months, gross unrealized losses (7) (18)
12 months or longer, fair value 1,104 341
12 months or longer, gross unrealized losses (76) (49)
Total, fair value 1,355 1,212
Total, gross unrealized losses (83) (67)
Corporate notes and other    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 16 15
Less than 12 months, gross unrealized losses (1) (2)
12 months or longer, fair value 123 141
12 months or longer, gross unrealized losses (10) (10)
Total, fair value 139 156
Total, gross unrealized losses $ (11) $ (12)