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Fair Value (Fair Value Measurements - Recurring Quantitative Information) (Details) $ in Millions | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | $ 40,590 | $ 44,159
Fair value | 4,006 | 3,423
Derivative Liability | (5,225) | (4,524)
Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 40,590 | 44,159
Loans, fair value | 1,244 | 1,310
Equity investments | 2,618 | 3,147
Derivative Liability | (8,220) | (7,618)
Recurring assets - fair value | 56,118 | 59,135
Residential mortgage-backed non-agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 713 | 819
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total recurring assets net of recurring liabilities - fair value | 7,208 | 6,831
Level 3 | Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 967 | 1,001
Loans, fair value | 738 | 769
Equity investments | 1,729 | 1,778
Derivative Liability | (108) | (123)
Recurring assets - fair value | 7,573 | 7,252
Level 3 | Commercial mortgage loans held for sale | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale, fair value | 25 | 33
Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 713 | 819
Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investment securities – available for sale | 103 | 124
Level 3 | Loans - Residential real estate - Uninsured | Consensus pricing |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 555 | 570
Level 3 | Loans - Residential real estate | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 75 | 76
Level 3 | Loans - Home equity - First-lien | Consensus pricing |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 19 | 25
Level 3 | Loans - Home equity | Consensus pricing |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans, fair value | 89 | 98
Level 3 | Equity investments | Multiple of adjusted earnings |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity investments | 1,729 | 1,778
Level 3 | Residential mortgage servicing rights | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | 2,837 | 2,310
Level 3 | Commercial mortgage servicing rights | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | 1,169 | 1,113
Level 3 | Financial derivatives | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative Liability | (99) | (107)
Level 3 | Insignificant Assets, Net of Liabilities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Insignificant assets, fair value disclosure | $ (7) | $ (8)
Spread over the benchmark curve | Level 3 | Commercial mortgage loans held for sale | Discounted cash flow | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.0585 | 0.0585
Spread over the benchmark curve | Level 3 | Commercial mortgage loans held for sale | Discounted cash flow | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.7140 | 0.2465
Spread over the benchmark curve | Level 3 | Commercial mortgage loans held for sale | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.2611 | 0.0959
Spread over the benchmark curve | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.0250 | 0.0289
Spread over the benchmark curve | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.0256 | 0.0296
Spread over the benchmark curve | Level 3 | Residential mortgage servicing rights | Discounted cash flow | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.0337 | 0.0254
Spread over the benchmark curve | Level 3 | Residential mortgage servicing rights | Discounted cash flow | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.1650 | 0.1653
Spread over the benchmark curve | Level 3 | Residential mortgage servicing rights | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.0765 | 0.0766
Constant prepayment rate | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | 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 | Priced by a third-party vendor using a discounted cash flow pricing model | 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 | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.038 | 0.099
Constant prepayment rate | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | 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 | Priced by a third-party vendor using a discounted cash flow pricing model | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.110 | 0.400
Constant prepayment rate | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.053 | 0.075
Constant prepayment rate | Level 3 | Residential mortgage servicing rights | Discounted cash flow | 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 | Discounted cash flow | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.297 | 0.345
Constant prepayment rate | Level 3 | Residential mortgage servicing rights | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.058 | 0.067
Constant prepayment rate | Level 3 | Commercial mortgage servicing rights | Discounted cash flow | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.052 | 0.039
Constant prepayment rate | Level 3 | Commercial mortgage servicing rights | Discounted cash flow | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.074 | 0.098
Constant prepayment rate | Level 3 | Commercial mortgage servicing rights | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.054 | 0.043
Constant default rate | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | 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 | Priced by a third-party vendor using a discounted cash flow pricing model | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.120 | 0.130
Constant default rate | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.028 | 0.040
Constant default rate | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | 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 | Priced by a third-party vendor using a discounted cash flow pricing model | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.043 | 0.073
Constant default rate | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.017 | 0.021
Loss severity | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.100 | 0.150
Loss severity | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.714 | 0.800
Loss severity | Level 3 | Residential mortgage-backed non-agency securities | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.421 | 0.461
Loss severity | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.300 | 0.200
Loss severity | Level 3 | Asset-backed | Priced by a third-party vendor using a discounted cash flow pricing model | 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 | Priced by a third-party vendor using a discounted cash flow pricing model | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, measurement input | 0.488 | 0.490
Loss severity | Level 3 | Loans - Residential real estate - Uninsured | Consensus pricing | Minimum |  |
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 | Loans - Residential real estate - Uninsured | Consensus pricing | Maximum |  |
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 | Loans - Residential real estate - Uninsured | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.054 | 0.062
Loss severity | Level 3 | Loans - Residential real estate | Discounted cash flow | Weighted Average |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Minimum |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Maximum |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.152 | 0.153
Cumulative default rate | Level 3 | Loans - Residential real estate - Uninsured | Consensus pricing | Minimum |  |
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 | Loans - Residential real estate - Uninsured | Consensus pricing | Maximum |  |
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 | Loans - Residential real estate - Uninsured | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.596 | 0.662
Cumulative default rate | Level 3 | Loans - Home equity - First-lien | Consensus pricing | Minimum |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Maximum |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.633 | 0.725
Discount rate | Level 3 | Loans - Residential real estate - Uninsured | Consensus pricing | Minimum |  |
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 | Loans - Residential real estate - Uninsured | Consensus pricing | Maximum |  |
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 | Loans - Residential real estate - Uninsured | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.058 | 0.059
Discount rate | Level 3 | Loans - Residential real estate | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.084 | 0.079
Discount rate | Level 3 | Loans - Home equity - First-lien | Consensus pricing | Minimum |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Maximum |  |
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 | Loans - Home equity - First-lien | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.063 | 0.065
Discount rate | Level 3 | Commercial mortgage servicing rights | Discounted cash flow | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.083 | 0.078
Discount rate | Level 3 | Commercial mortgage servicing rights | Discounted cash flow | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.107 | 0.101
Discount rate | Level 3 | Commercial mortgage servicing rights | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Servicing asset, measurement input | 0.102 | 0.098
Credit and liquidity discount | Level 3 | Loans - Home equity | Consensus pricing | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.004 | 0.004
Credit and liquidity discount | Level 3 | Loans - Home equity | Consensus pricing | Maximum |  |
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 | Loans - Home equity | Consensus pricing | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financing receivable, measurement input | 0.447 | 0.462
Multiple of earnings | Level 3 | Equity investments | Multiple of adjusted earnings | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities, measurement input | 0.045 | 0.045
Multiple of earnings | Level 3 | Equity investments | Multiple of adjusted earnings | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities, measurement input | 0.200 | 0.250
Multiple of earnings | Level 3 | Equity investments | Multiple of adjusted earnings | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities, measurement input | 0.097 | 0.091
Estimated Conversion Factor | Level 3 | Financial derivatives | Discounted cash flow | Weighted Average |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability, measurement input | 1.59 | 1.61
Estimated Annual Growth Rate | Level 3 | Financial derivatives | Discounted cash flow |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liability, measurement input | 0.160 | 0.160

X
- Definition This element represents total assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity net of total liabilities at period end measured at fair value on a recurring basis. + References No definition available. + Details
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- Definition Insignificant Assets (Liabilities), Fair Value Disclosure + References No definition available. + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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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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