v3.25.1
Loans and ACL - Delinquency Status of Loans that Were Modified During the Period (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated $ 3,521 $ 3,257
Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 2,993 2,731
Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 272 365
Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 256 161
Nonperforming    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 503 401
Nonperforming | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 306 232
Nonperforming | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 43 78
Nonperforming | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 154 91
Commercial: | Commercial and industrial    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 1,018 1,036
Commercial: | Commercial and industrial | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 950 974
Commercial: | Commercial and industrial | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 13 44
Commercial: | Commercial and industrial | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 55 18
Commercial: | CRE    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 447 323
Commercial: | CRE | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 447 313
Commercial: | CRE | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 0 7
Commercial: | CRE | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 0 3
Commercial: | Commercial construction    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 108 79
Commercial: | Commercial construction | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 108 79
Commercial: | Commercial construction | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 0 0
Commercial: | Commercial construction | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 0 0
Consumer: | Residential mortgage    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 571 476
Consumer: | Residential mortgage | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 343 279
Consumer: | Residential mortgage | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 92 95
Consumer: | Residential mortgage | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 136 102
Consumer: | Home equity    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 5 9
Consumer: | Home equity | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 5 9
Consumer: | Home equity | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 0 0
Consumer: | Home equity | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 0 0
Consumer: | Indirect auto    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 1,313 1,273
Consumer: | Indirect auto | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 1,090 1,025
Consumer: | Indirect auto | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 162 213
Consumer: | Indirect auto | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 61 35
Consumer: | Other consumer    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 34 36
Consumer: | Other consumer | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 31 32
Consumer: | Other consumer | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 2 3
Consumer: | Other consumer | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 1 1
Credit card    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 25 25
Credit card | Financial Asset, Not Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 19 20
Credit card | Financing Receivables 30 To 89 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated 3 3
Credit card | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Modified    
Financing Receivable, Modified, Accumulated $ 3 $ 2