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Asset Quality - Aging Analysis of Past Due and Current Loans (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total loans | $ 106,541 | $ 104,260
Accrued interest | 459 | 456
Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 615 | 758
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 105,607 | 103,206
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 148 | 120
60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 72 | 86
90 and Greater Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 99 | 90
Total Past Due and Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 934 | 1,054
Total commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 76,509 | 71,891
Accrued interest | 338 | 322
Total commercial loans | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 420 | 565
Total commercial loans | Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 57,688 | 52,909
Total commercial loans | Commercial and Industrial | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 256 | 322
Total commercial loans | Total commercial real estate loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 16,551 | 16,246
Total commercial loans | Total commercial real estate loans | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 157 | 243
Total commercial loans | Real estate — commercial mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 13,707 | 13,310
Total commercial loans | Real estate — commercial mortgage | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 157 | 243
Total commercial loans | Real estate — construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 2,844 | 2,936
Total commercial loans | Real estate — construction | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 0 | 0
Total commercial loans | Commercial lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 2,270 | 2,736
Total commercial loans | Commercial lease financing | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 7 | 0
Total commercial loans | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 205 | 212
Total commercial loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 75,889 | 71,151
Total commercial loans | Current | Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 57,336 | 52,473
Total commercial loans | Current | Total commercial real estate loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 16,293 | 15,950
Total commercial loans | Current | Real estate — commercial mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 13,450 | 13,018
Total commercial loans | Current | Real estate — commercial mortgage | Government National Mortgage Association (GNMA) |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 66 | 75
Total commercial loans | Current | Real estate — construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 2,843 | 2,932
Total commercial loans | Current | Commercial lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 2,260 | 2,728
Total commercial loans | Current | Real estate — residential mortgage | Government National Mortgage Association (GNMA) |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 6 | 7
Total commercial loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 88 | 53
Total commercial loans | 30-59 Days Past Due | Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 38 | 48
Total commercial loans | 30-59 Days Past Due | Total commercial real estate loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 47 | 4
Total commercial loans | 30-59 Days Past Due | Real estate — commercial mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 47 | 4
Total commercial loans | 30-59 Days Past Due | Real estate — construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 0 | 0
Total commercial loans | 30-59 Days Past Due | Commercial lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 3 | 1
Total commercial loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 37 | 56
Total commercial loans | 60-89 Days Past Due | Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 17 | 21
Total commercial loans | 60-89 Days Past Due | Total commercial real estate loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 20 | 29
Total commercial loans | 60-89 Days Past Due | Real estate — commercial mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 20 | 29
Total commercial loans | 60-89 Days Past Due | Real estate — construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 0 | 0
Total commercial loans | 60-89 Days Past Due | Commercial lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 0 | 6
Total commercial loans | 90 and Greater Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 75 | 66
Total commercial loans | 90 and Greater Days Past Due | Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 41 | 45
Total commercial loans | 90 and Greater Days Past Due | Total commercial real estate loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 34 | 20
Total commercial loans | 90 and Greater Days Past Due | Real estate — commercial mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 33 | 16
Total commercial loans | 90 and Greater Days Past Due | Real estate — construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 1 | 4
Total commercial loans | 90 and Greater Days Past Due | Commercial lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 0 | 1
Total commercial loans | Total Past Due and Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 620 | 740
Total commercial loans | Total Past Due and Non-performing Loans | Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 352 | 436
Total commercial loans | Total Past Due and Non-performing Loans | Total commercial real estate loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 258 | 296
Total commercial loans | Total Past Due and Non-performing Loans | Real estate — commercial mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 257 | 292
Total commercial loans | Total Past Due and Non-performing Loans | Real estate — construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 1 | 4
Total commercial loans | Total Past Due and Non-performing Loans | Commercial lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 10 | 8
Total consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 30,032 | 32,369
Accrued interest | 121 | 134
Total consumer loans | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 195 | 193
Total consumer loans | Real estate — residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 18,732 | 19,886
Total consumer loans | Real estate — residential mortgage | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 104 | 92
Total consumer loans | Home equity loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 5,703 | 6,358
Total consumer loans | Home equity loans | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 80 | 89
Total consumer loans | Other consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 4,644 | 5,167
Total consumer loans | Other consumer loans | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 4 | 5
Total consumer loans | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 953 | 958
Total consumer loans | Credit cards | Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 7 | 7
Total consumer loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 29,718 | 32,055
Total consumer loans | Current | Real estate — residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 18,593 | 19,766
Total consumer loans | Current | Home equity loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 5,593 | 6,232
Total consumer loans | Current | Other consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 4,606 | 5,129
Total consumer loans | Current | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 926 | 928
Total consumer loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 60 | 67
Total consumer loans | 30-59 Days Past Due | Real estate — residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 21 | 20
Total consumer loans | 30-59 Days Past Due | Home equity loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 18 | 26
Total consumer loans | 30-59 Days Past Due | Other consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 15 | 15
Total consumer loans | 30-59 Days Past Due | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 6 | 6
Total consumer loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 35 | 30
Total consumer loans | 60-89 Days Past Due | Real estate — residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 14 | 8
Total consumer loans | 60-89 Days Past Due | Home equity loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 7 | 8
Total consumer loans | 60-89 Days Past Due | Other consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 10 | 9
Total consumer loans | 60-89 Days Past Due | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 4 | 5
Total consumer loans | 90 and Greater Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 24 | 24
Total consumer loans | 90 and Greater Days Past Due | Real estate — residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 0 | 0
Total consumer loans | 90 and Greater Days Past Due | Home equity loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 5 | 3
Total consumer loans | 90 and Greater Days Past Due | Other consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 9 | 9
Total consumer loans | 90 and Greater Days Past Due | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 10 | 12
Total consumer loans | Total Past Due and Non-performing Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 314 | 314
Total consumer loans | Total Past Due and Non-performing Loans | Real estate — residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 139 | 120
Total consumer loans | Total Past Due and Non-performing Loans | Home equity loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 110 | 126
Total consumer loans | Total Past Due and Non-performing Loans | Other consumer loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 38 | 38
Total consumer loans | Total Past Due and Non-performing Loans | Credit cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | $ 27 | $ 30

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