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Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | $ 19,452 | $ 16,986
Derivative assets |  | 1,617 | 928
Derivative liabilities |  | 2,131 | 747
U.S. Treasury and other U.S. government agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | 2,756 | 2,993
Residential Mortgage Backed Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale | [1] | 12,052 | 13,288
Commercial Mortgage Backed Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale | [1] | 4,644 | 705
Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | 19,452 | 16,986
Derivative assets |  | 1,617 | 928
Total assets at fair value |  | 21,209 | 18,089
Derivative liabilities |  | 2,143 | 760
Deferred compensation plan liabilities |  | 87 | 113
Total liabilities at fair value |  | 2,230 | 873
Recurring | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | 2,756 | 2,993
Derivative assets |  | 0 | 0
Total assets at fair value |  | 2,896 | 3,168
Derivative liabilities |  | 0 | 0
Deferred compensation plan liabilities |  | 87 | 113
Total liabilities at fair value |  | 87 | 113
Recurring | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | 16,696 | 13,993
Derivative assets |  | 1,617 | 902
Total assets at fair value |  | 18,313 | 14,895
Derivative liabilities |  | 2,131 | 747
Deferred compensation plan liabilities |  | 0 | 0
Total liabilities at fair value |  | 2,131 | 747
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 | 26
Total assets at fair value |  | 0 | 26
Derivative liabilities |  | 12 | 13
Deferred compensation plan liabilities |  | 0 | 0
Total liabilities at fair value |  | 12 | 13
Recurring | Interest rate contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 212 | 239
Derivative liabilities |  | 741 | 69
Recurring | Interest rate contracts | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
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 |  | 212 | 213
Derivative liabilities |  | 741 | 69
Recurring | Interest rate contracts | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 26
Derivative liabilities |  | 0 | 0
Recurring | Energy contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 1,325 | 670
Derivative liabilities |  | 1,316 | 662
Recurring | Energy contracts | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
Derivative liabilities |  | 0 | 0
Recurring | Energy contracts | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 1,325 | 670
Derivative liabilities |  | 1,316 | 662
Recurring | Energy contracts | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
Derivative liabilities |  | 0 | 0
Recurring | Foreign exchange contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 80 | 19
Derivative liabilities |  | 74 | 16
Recurring | Foreign exchange contracts | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
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 |  | 80 | 19
Derivative liabilities |  | 74 | 16
Recurring | Foreign exchange contracts | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets |  | 0 | 0
Derivative liabilities |  | 0 | 0
Recurring | Other financial derivative |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative liabilities |  | 12 | 13
Recurring | Other financial derivative | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative liabilities |  | 0 | 0
Recurring | Other financial derivative | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative liabilities |  | 0 | 0
Recurring | Other financial derivative | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total liabilities at fair value |  | 12 | 13
Recurring | Deferred compensation plan assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets |  | 87 | 113
Recurring | Deferred compensation plan assets | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets |  | 87 | 113
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 and other non-debt securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 53 | 62
Recurring | Equity and other non-debt securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 53 | 62
Recurring | Equity and other non-debt securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 0 | 0
Recurring | Equity and other non-debt securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity securities |  | 0 | 0
Recurring | U.S. Treasury and other U.S. government agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | 2,756 | 2,993
Recurring | U.S. Treasury and other U.S. government agency securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment securities available-for-sale |  | 2,756 | 2,993
Recurring | U.S. Treasury and other U.S. government agency 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 and other U.S. government agency 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] | 12,052 | 13,288
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] | 12,052 | 13,288
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] | 4,644 | 705
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] | 4,644 | 705
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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