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Loans and Related Allowance for Credit Losses (Analysis of Loan Portfolio) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans | [1] | $ 321,508 | $ 326,025
Percentage of total loans, past due |  | 100.00% | 100.00%
Accrued interest on loan portfolio |  | $ 1,500 | $ 1,200
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] |  | Other | Other
Unearned income, unamortized deferred fees and costs on originated loans, and premiums or discounts on purchased loans |  | $ 1,000 | $ 900
Collateral Pledged |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 1,400 | 1,300
Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 1,384 | $ 1,490
Percentage of total loans, past due |  | 0.43% | 0.46%
Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 317,359 | $ 321,904
Percentage of total loans, past due |  | 98.71% | 98.73%
30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 685 | $ 747
Percentage of total loans, past due |  | 0.21% | 0.23%
60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 270 | $ 261
Percentage of total loans, past due |  | 0.08% | 0.08%
90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 429 | $ 482
Percentage of total loans, past due |  | 0.13% | 0.15%
Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 2,180 | $ 1,985
Percentage of total loans, past due |  | 0.68% | 0.61%
Fair Value Option Nonaccrual Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans |  | $ 585 | $ 646
Percentage of total loans, nonaccrual, past due |  | 0.18% | 0.20%
Residential real estate |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 47,544 | $ 45,889
Residential real estate | Government insured or guaranteed loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 653 | 693
Home equity |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 26,150 | 25,983
Education |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 1,945 | 2,173
Other consumer |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 4,271 | 5,026
Commercial |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 219,558 | 225,049
Commercial | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 290 | 380
Commercial | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 217,961 | 223,811
Commercial | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 152 | 208
Commercial | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 53 | 35
Commercial | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 85 | 137
Commercial | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 1,307 | 858
Commercial | Commercial and industrial |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 177,580 | 182,219
Commercial | Commercial and industrial | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 225 | 333
Commercial | Commercial and industrial | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 176,796 | 181,223
Commercial | Commercial and industrial | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 104 | 169
Commercial | Commercial and industrial | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 45 | 27
Commercial | Commercial and industrial | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 76 | 137
Commercial | Commercial and industrial | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 559 | 663
Commercial | Commercial real estate |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 35,436 | 36,316
Commercial | Commercial real estate | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 16 | 23
Commercial | Commercial real estate | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 34,685 | 36,104
Commercial | Commercial real estate | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 7 | 19
Commercial | Commercial real estate | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  |  | 4
Commercial | Commercial real estate | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 9 |
Commercial | Commercial real estate | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 735 | 189
Commercial | Equipment lease financing |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 6,542 | 6,514
Commercial | Equipment lease financing | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 49 | 24
Commercial | Equipment lease financing | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 6,480 | 6,484
Commercial | Equipment lease financing | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 41 | 20
Commercial | Equipment lease financing | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 8 | 4
Commercial | Equipment lease financing | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  |  |
Commercial | Equipment lease financing | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 13 | 6
Consumer |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 101,950 | 100,976
Consumer | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 1,094 | 1,110
Consumer | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 99,398 | 98,093
Consumer | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 533 | 539
Consumer | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 217 | 226
Consumer | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 344 | 345
Consumer | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 873 | 1,127
Consumer | Fair Value Option Nonaccrual Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans |  | 585 | 646
Consumer | Residential real estate |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 47,544 | 45,889
Consumer | Residential real estate | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 575 | 592
Consumer | Residential real estate | Total Past Due | Government insured or guaranteed loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 300 | 300
Consumer | Residential real estate | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 46,159 | 44,306
Consumer | Residential real estate | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 282 | 281
Consumer | Residential real estate | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 101 | 112
Consumer | Residential real estate | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 192 | 199
Consumer | Residential real estate | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 294 | 424
Consumer | Residential real estate | Fair Value Option Nonaccrual Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans |  | 516 | 567
Consumer | Home equity |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 26,150 | 25,983
Consumer | Home equity | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 90 | 73
Consumer | Home equity | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 25,533 | 25,305
Consumer | Home equity | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 63 | 53
Consumer | Home equity | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 27 | 20
Consumer | Home equity | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  |  |
Consumer | Home equity | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 458 | 526
Consumer | Home equity | Fair Value Option Nonaccrual Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Nonaccrual loans |  | 69 | 79
Consumer | Automobile |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 14,860 | 14,836
Consumer | Automobile | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 118 | 138
Consumer | Automobile | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 14,638 | 14,543
Consumer | Automobile | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 91 | 106
Consumer | Automobile | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 20 | 25
Consumer | Automobile | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 7 | 7
Consumer | Automobile | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 104 | 155
Consumer | Credit card |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 7,180 | 7,069
Consumer | Credit card | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 179 | 155
Consumer | Credit card | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 6,991 | 6,906
Consumer | Credit card | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 54 | 50
Consumer | Credit card | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 39 | 35
Consumer | Credit card | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 86 | 70
Consumer | Credit card | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 10 | 8
Consumer | Education |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 1,945 | 2,173
Consumer | Education | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 95 | 115
Consumer | Education | Total Past Due | Government insured or guaranteed loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 100 | 100
Consumer | Education | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 1,850 | 2,058
Consumer | Education | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 27 | 34
Consumer | Education | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 19 | 22
Consumer | Education | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 49 | 59
Consumer | Education | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  |  |
Consumer | Other consumer |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 4,271 | 5,026
Consumer | Other consumer | Total Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 37 | 37
Consumer | Other consumer | Current or Less Than 30 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 4,227 | 4,975
Consumer | Other consumer | 30-59 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 16 | 15
Consumer | Other consumer | 60-89 Days Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 11 | 12
Consumer | Other consumer | 90 Days or More Past Due |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | 10 | 10
Consumer | Other consumer | Nonperforming Loans |  |  |
Financing Receivable. Recorded Investment, Past Due [Line Items] |  |  |
Total loans |  | $ 7 | $ 14
[1] | Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $0.7 billion, Loans of $1.2 billion and Other assets of $0.1 billion at December 31, 2023. Comparable amounts at December 31, 2022 were $0.9 billion, $1.3 billion and $0.1 billion, respectively.

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