v3.26.3
Securities - Schedule of Amortized Cost and Fair Value by Contractual Maturity of Investment Securities HTM and AFS (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Investment securities HTM, Fair value    
Total $ 2,050 $ 2,410
Investment securities AFS, Amortized cost    
Amortized Cost 19,128 6,699
Investment securities AFS, Fair value    
Total 18,190 6,567
U.S. Treasury securities    
Investment securities HTM, Fair value    
Total   20
Investment securities AFS, Amortized cost    
Within One Year 414  
1 to 5 Years 1,751  
5 to 10 Years 0  
More Than 10 Years 636  
Amortized Cost 2,801 1,576
Investment securities AFS, Fair value    
Within One Year 413  
1 to 5 Years 1,701  
5 to 10 Years 0  
More Than 10 Years 647  
Total 2,761 1,586
U.S. Government agency securities    
Investment securities HTM, Amortized cost    
Within One Year 156  
1 to 5 Years 45  
5 to 10 Years 25  
More Than 10 Years 0  
Total 226  
Investment securities HTM, Fair value    
Within One Year 155  
1 to 5 Years 44  
5 to 10 Years 22  
More Than 10 Years 0  
Total 221 221
Investment securities AFS, Amortized cost    
Within One Year 0  
1 to 5 Years 187  
5 to 10 Years 2  
More Than 10 Years 15  
Amortized Cost 204 210
Investment securities AFS, Fair value    
Within One Year 0  
1 to 5 Years 169  
5 to 10 Years 2  
More Than 10 Years 12  
Total 183 195
Mortgage-backed securities    
Investment securities HTM, Amortized cost    
Within One Year 4  
1 to 5 Years 101  
5 to 10 Years 129  
More Than 10 Years 85  
Total 319  
Investment securities HTM, Fair value    
Within One Year 4  
1 to 5 Years 93  
5 to 10 Years 117  
More Than 10 Years 79  
Total 293 332
Investment securities AFS, Amortized cost    
Within One Year 0  
1 to 5 Years 2,975  
5 to 10 Years 1,193  
More Than 10 Years 11,167  
Amortized Cost 15,335 2,852
Investment securities AFS, Fair value    
Within One Year 0  
1 to 5 Years 2,849  
5 to 10 Years 1,124  
More Than 10 Years 10,561  
Total 14,534 2,794
State and municipal securities    
Investment securities HTM, Amortized cost    
Within One Year 1  
1 to 5 Years 11  
5 to 10 Years 54  
More Than 10 Years 1,650  
Total 1,716  
Investment securities HTM, Fair value    
Within One Year 1  
1 to 5 Years 11  
5 to 10 Years 50  
More Than 10 Years 1,360  
Total 1,422 1,667
Investment securities AFS, Amortized cost    
Within One Year 0  
1 to 5 Years 0  
5 to 10 Years 6  
More Than 10 Years 499  
Amortized Cost 505 1,768
Investment securities AFS, Fair value    
Within One Year 0  
1 to 5 Years 0  
5 to 10 Years 6  
More Than 10 Years 438  
Total 444 1,709
Asset-backed securities    
Investment securities HTM, Amortized cost    
Within One Year 0  
1 to 5 Years 0  
5 to 10 Years 0  
More Than 10 Years 55  
Total 55  
Investment securities HTM, Fair value    
Within One Year 0  
1 to 5 Years 0  
5 to 10 Years 0  
More Than 10 Years 53  
Total 53 $ 106
Corporate notes and other    
Investment securities HTM, Amortized cost    
Within One Year 0  
1 to 5 Years 54  
5 to 10 Years 11  
More Than 10 Years 0  
Total 65  
Investment securities HTM, Fair value    
Within One Year 0  
1 to 5 Years 51  
5 to 10 Years 10  
More Than 10 Years 0  
Total 61  
Investment securities AFS, Amortized cost    
Within One Year 15  
1 to 5 Years 110  
5 to 10 Years 145  
More Than 10 Years 13  
Amortized Cost 283  
Investment securities AFS, Fair value    
Within One Year 15  
1 to 5 Years 103  
5 to 10 Years 138  
More Than 10 Years 12  
Total $ 268