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Fair Value (Fair Value Measurements - Recurring Quantitative Information) (Details) $ in Millions | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | $ 60,338 | $ 41,785
Fair value | 3,503 | 3,686
Financial derivatives - Swaps related to sales of certain Visa Class B common shares | (2,360) | (3,538)
Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 60,338 | 41,785
Loans, fair value | 1,173 | 1,238
Equity investments | 3,242 | 2,717
Financial derivatives - Swaps related to sales of certain Visa Class B common shares | (4,627) | (5,899)
Recurring assets - fair value | 75,841 | 56,862
Recurring liabilities - fair value | 6,356 | 6,953
Residential mortgage-backed non-agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 628 | 696
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity investments | 2,063 | 1,952
Financial derivatives - Swaps related to sales of certain Visa Class B common shares | (276) | (145)
Insignificant assets, net of liabilities fair value disclosure | 58 | 22
Total recurring assets net of recurring liabilities - fair value | 6,760 | 7,050
Level 3 | Total consumer | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 70 | 75
Level 3 | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 518 | 546
Level 3 | Total consumer | Home equity |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 80 | 87
Level 3 | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 16 | 18
Level 3 | Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 881 | 956
Loans, fair value | 684 | 726
Equity investments | 2,063 | 1,952
Financial derivatives - Swaps related to sales of certain Visa Class B common shares | (281) | (152)
Recurring assets - fair value | 7,225 | 7,448
Recurring liabilities - fair value | 465 | 398
Level 3 | Commercial mortgage loans held for sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale, fair value | 4 | 11
Level 3 | Residential mortgage-backed non-agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 628 | 696
Level 3 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 96 | 102
Level 3 | Residential mortgage servicing rights |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | 2,528 | 2,654
Level 3 | Commercial mortgage servicing rights |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | $ 975 | $ 1,032
Spread over the benchmark curve | Level 3 | Commercial mortgage loans held for sale | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.0570 | 0.0575
Spread over the benchmark curve | Level 3 | Commercial mortgage loans held for sale | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.1085 | 0.3610
Spread over the benchmark curve | Level 3 | Commercial mortgage loans held for sale | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.0980 | 0.1647
Spread over the benchmark curve | Level 3 | Residential mortgage-backed non-agency securities | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.0247 | 0.0285
Spread over the benchmark curve | Level 3 | Asset-backed | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.0193 | 0.0248
Spread over the benchmark curve | Level 3 | Residential mortgage servicing rights | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.0221 | 0.0337
Spread over the benchmark curve | Level 3 | Residential mortgage servicing rights | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.1732 | 0.1668
Spread over the benchmark curve | Level 3 | Residential mortgage servicing rights | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.0755 | 0.0765
Constant prepayment rate | Level 3 | Residential mortgage-backed non-agency securities | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.010 | 0.010
Constant prepayment rate | Level 3 | Residential mortgage-backed non-agency securities | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.279 | 0.279
Constant prepayment rate | Level 3 | Residential mortgage-backed non-agency securities | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.042 | 0.037
Constant prepayment rate | Level 3 | Asset-backed | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.010 | 0.010
Constant prepayment rate | Level 3 | Asset-backed | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.080 | 0.280
Constant prepayment rate | Level 3 | Asset-backed | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.038 | 0.051
Constant prepayment rate | Level 3 | Residential mortgage servicing rights | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.000 | 0.000
Constant prepayment rate | Level 3 | Residential mortgage servicing rights | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.516 | 0.336
Constant prepayment rate | Level 3 | Residential mortgage servicing rights | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.072 | 0.064
Constant prepayment rate | Level 3 | Commercial mortgage servicing rights | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.043 | 0.053
Constant prepayment rate | Level 3 | Commercial mortgage servicing rights | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.091 | 0.097
Constant prepayment rate | Level 3 | Commercial mortgage servicing rights | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.044 | 0.055
Constant default rate | Level 3 | Residential mortgage-backed non-agency securities | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.000 | 0.000
Constant default rate | Level 3 | Residential mortgage-backed non-agency securities | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.120 | 0.120
Constant default rate | Level 3 | Residential mortgage-backed non-agency securities | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.019 | 0.027
Constant default rate | Level 3 | Asset-backed | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.000 | 0.000
Constant default rate | Level 3 | Asset-backed | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.070 | 0.043
Constant default rate | Level 3 | Asset-backed | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.015 | 0.017
Loss severity | Level 3 | Minimum | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.000 | 0.000
Loss severity | Level 3 | Minimum | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.000 | 0.000
Loss severity | Level 3 | Maximum | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 1.000 | 1.000
Loss severity | Level 3 | Maximum | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 1.000 | 1.000
Loss severity | Level 3 | Weighted Average | Total consumer | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.060 | 0.060
Loss severity | Level 3 | Weighted Average | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.051 | 0.054
Loss severity | Level 3 | Weighted Average | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.123 | 0.144
Loss severity | Level 3 | Residential mortgage-backed non-agency securities | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.150 | 0.100
Loss severity | Level 3 | Residential mortgage-backed non-agency securities | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.774 | 0.690
Loss severity | Level 3 | Residential mortgage-backed non-agency securities | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.432 | 0.412
Loss severity | Level 3 | Asset-backed | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.350 | 0.200
Loss severity | Level 3 | Asset-backed | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 1.000 | 1.000
Loss severity | Level 3 | Asset-backed | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.468 | 0.495
Cumulative default rate | Level 3 | Minimum | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.036 | 0.036
Cumulative default rate | Level 3 | Minimum | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.036 | 0.036
Cumulative default rate | Level 3 | Maximum | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 1.000 | 1.000
Cumulative default rate | Level 3 | Maximum | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 1.000 | 1.000
Cumulative default rate | Level 3 | Weighted Average | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.572 | 0.591
Cumulative default rate | Level 3 | Weighted Average | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.569 | 0.609
Discount rate | Level 3 | Minimum | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.055 | 0.055
Discount rate | Level 3 | Minimum | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.055 | 0.055
Discount rate | Level 3 | Maximum | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.075 | 0.075
Discount rate | Level 3 | Maximum | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.075 | 0.075
Discount rate | Level 3 | Weighted Average | Total consumer | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.068 | 0.078
Discount rate | Level 3 | Weighted Average | Total consumer | Loans - Residential real estate - Uninsured |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.058 | 0.058
Discount rate | Level 3 | Weighted Average | Total consumer | Loans - Home equity - First-lien |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.061 | 0.062
Discount rate | Level 3 | Commercial mortgage servicing rights | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.090 | 0.076
Discount rate | Level 3 | Commercial mortgage servicing rights | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.109 | 0.100
Discount rate | Level 3 | Commercial mortgage servicing rights | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.107 | 0.096
Credit and liquidity discount | Level 3 | Minimum | Total consumer | Home equity |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.003 | 0.003
Credit and liquidity discount | Level 3 | Maximum | Total consumer | Home equity |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 1.000 | 1.000
Credit and liquidity discount | Level 3 | Weighted Average | Total consumer | Home equity |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.410 | 0.438
Multiple of earnings | Level 3 | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities, measurement input | 0.055 | 0.045
Multiple of earnings | Level 3 | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities, measurement input | 0.270 | 0.267
Multiple of earnings | Level 3 | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities, measurement input | 0.103 | 0.101
Estimated Conversion Factor | Level 3 | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability, measurement input | 1.54 | 1.59
Estimated Annual Growth Rate | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability, measurement input | 0.160 | 0.160

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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