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Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | $ 15,102 | $ 15,045
Derivative assets: |  | 775 | 666
Total derivative liabilities |  | 847 | 794
U.S. Treasury securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 1,287 | 1,277
Residential mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 9,022 | 9,076
Commercial mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 4,793 | 4,692
Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 15,102 | 15,045
Derivative assets: |  | 775 | 666
Total assets at fair value |  | 16,009 | 15,846
Total derivative liabilities |  | 855 | 800
Deferred compensation plan liabilities |  | 88 | 91
Total liabilities at fair value |  | 943 | 891
Recurring | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 1,287 | 1,277
Derivative assets: |  | 0 | 0
Total assets at fair value |  | 1,419 | 1,412
Total derivative liabilities |  | 0 | 0
Deferred compensation plan liabilities |  | 88 | 91
Total liabilities at fair value |  | 88 | 91
Recurring | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 13,815 | 13,768
Derivative assets: |  | 775 | 666
Total assets at fair value |  | 14,590 | 14,434
Total derivative liabilities |  | 847 | 794
Deferred compensation plan liabilities |  | 0 | 0
Total liabilities at fair value |  | 847 | 794
Recurring | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 0 | 0
Derivative assets: |  | 0 | 0
Total assets at fair value |  | 0 | 0
Total derivative liabilities |  | 8 | 6
Deferred compensation plan liabilities |  | 0 | 0
Total liabilities at fair value |  | 8 | 6
Recurring | Interest rate contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 158 | 177
Total derivative liabilities |  | 249 | 335
Recurring | Interest rate contracts | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 0 | 0
Total derivative liabilities |  | 0 | 0
Recurring | Interest rate contracts | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 158 | 177
Total derivative liabilities |  | 249 | 335
Recurring | Interest rate contracts | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 0 | 0
Total derivative liabilities |  | 0 | 0
Recurring | Energy contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 577 | 416
Total derivative liabilities |  | 562 | 400
Recurring | Energy contracts | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 0 | 0
Total derivative liabilities |  | 0 | 0
Recurring | Energy contracts | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 577 | 416
Total derivative liabilities |  | 562 | 400
Recurring | Energy contracts | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 0 | 0
Total derivative liabilities |  | 0 | 0
Recurring | Foreign exchange contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 40 | 73
Total derivative liabilities |  | 36 | 59
Recurring | Foreign exchange contracts | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 0 | 0
Total derivative liabilities |  | 0 | 0
Recurring | Foreign exchange contracts | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 40 | 73
Total derivative liabilities |  | 36 | 59
Recurring | Foreign exchange contracts | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets: |  | 0 | 0
Total derivative liabilities |  | 0 | 0
Recurring | Other financial derivative liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total derivative liabilities |  | 8 | 6
Recurring | Other financial derivative liabilities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total derivative liabilities |  | 0 | 0
Recurring | Other financial derivative liabilities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total derivative liabilities |  | 0 | 0
Recurring | Other financial derivative liabilities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total derivative liabilities |  | 8 | 6
Total liabilities at fair value |  | 8 | 6
Recurring | Deferred compensation plan assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets |  | 86 | 89
Recurring | Deferred compensation plan assets | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets |  | 86 | 89
Recurring | Deferred compensation plan assets | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets |  | 0 | 0
Recurring | Deferred compensation plan assets | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets |  | 0 | 0
Recurring | Equity securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 46 | 46
Recurring | Equity securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 46 | 46
Recurring | Equity securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 0 | 0
Recurring | Equity securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 0 | 0
Recurring | U.S. Treasury securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 1,287 | 1,277
Recurring | U.S. Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 1,287 | 1,277
Recurring | U.S. Treasury securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 0 | 0
Recurring | U.S. Treasury securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: |  | 0 | 0
Recurring | Residential mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 9,022 | 9,076
Recurring | Residential mortgage-backed securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 0 | 0
Recurring | Residential mortgage-backed securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 9,022 | 9,076
Recurring | Residential mortgage-backed securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 0 | 0
Recurring | Commercial mortgage-backed securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 4,793 | 4,692
Recurring | Commercial mortgage-backed securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 0 | 0
Recurring | Commercial mortgage-backed securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | 4,793 | 4,692
Recurring | Commercial mortgage-backed securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale: | [1] | $ 0 | $ 0
[1] | Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

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