v3.26.3
Securities - Schedule of Gross Unrealized Losses on Investment Securities AFS (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value $ 15,840 $ 1,597
Less than 12 months, gross unrealized losses (778) (21)
12 months or longer, fair value 1,392 1,549
12 months or longer, gross unrealized losses (171) (142)
Total, fair value 17,232 3,146
Total, gross unrealized losses (949) (163)
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 1,844 205
Less than 12 months, gross unrealized losses (51) 0
12 months or longer, fair value 0 0
12 months or longer, gross unrealized losses 0 0
Total, fair value 1,844 205
Total, gross unrealized losses (51) 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 180 191
12 months or longer, gross unrealized losses (21) (15)
Total, fair value 182 191
Total, gross unrealized losses (21) (15)
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 13,837 506
Less than 12 months, gross unrealized losses (719) (1)
12 months or longer, fair value 686 876
12 months or longer, gross unrealized losses (82) (68)
Total, fair value 14,523 1,382
Total, gross unrealized losses (801) (69)
State and municipal securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 56 871
Less than 12 months, gross unrealized losses (6) (18)
12 months or longer, fair value 374 341
12 months or longer, gross unrealized losses (55) (49)
Total, fair value 430 1,212
Total, gross unrealized losses (61) (67)
Corporate notes and other    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 months, fair value 101 15
Less than 12 months, gross unrealized losses (2) (2)
12 months or longer, fair value 152 141
12 months or longer, gross unrealized losses (13) (10)
Total, fair value 253 156
Total, gross unrealized losses $ (15) $ (12)