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Derivative And Credit-Related Financial Instruments (Schedule Of Derivative Instruments) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | $ 81,200 | $ 67,665
Fair Value of Gross Derivative Assets | 1,125 | 1,279
Fair Value of Gross Derivative Liabilities | 1,486 | 1,695
Derivative asset, Netting adjustment - Offsetting derivative assets | (438) | (644)
Derivative liabilities, Netting adjustment - Offsetting derivative assets | (438) | (644)
Derivative assets, Netting adjustment - Cash collateral received | (210) | (180)
Derivative liabilities, Netting adjustment, Cash collateral posted | (15) | (4)
Net derivative assets included in the Consolidated Balance Sheets | 477 | 455
Net derivative liabilities included in the Consolidated Balance Sheets | 1,033 | 1,047
Derivative asset, securities pledged as collateral | (412) | (70)
Derivative liability, securities pledged as collateral | (1) | (202)
Net derivative assets after deducting amounts not offset in the Consolidated Balance Sheets | 65 | 385
Net derivative liabilities after deducting amounts not offset in the Consolidated Balance Sheets | 1,032 | 845
Credit valuation adjustments for counterparty credit risk | 1 | 2
Risk management purposes |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 39,183 | 30,142
Fair Value of Gross Derivative Assets | 1 | 1
Fair Value of Gross Derivative Liabilities | 51 | 53
Risk management purposes | Fair value swaps - receive fixed/pay floating | Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 1,800 |
Risk management purposes | Derivatives designated as hedging instruments | Fair value swaps - receive fixed/pay floating | Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 8,100 | 3,150
Fair Value of Gross Derivative Assets | 0 | 0
Fair Value of Gross Derivative Liabilities | 0 | 0
Risk management purposes | Derivatives designated as hedging instruments | Cash flow swaps - receive fixed/pay floating | Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 30,350 | 26,600
Fair Value of Gross Derivative Assets | 0 | 0
Fair Value of Gross Derivative Liabilities | 50 | 50
Risk management purposes | Derivatives designated as hedging instruments | Cash flow swaps - receive fixed/pay floating | Forward Starting Swap |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 8,300 | 4,600
Risk management purposes | Derivatives used as economic hedges | Spot, forwards and swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 733 | 392
Fair Value of Gross Derivative Assets | 1 | 1
Fair Value of Gross Derivative Liabilities | 1 | 3
Customer-initiated and other activities |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 42,017 | 37,523
Fair Value of Gross Derivative Assets | 1,124 | 1,278
Fair Value of Gross Derivative Liabilities | 1,435 | 1,642
Customer-initiated and other activities | Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 24,634 | 20,298
Fair Value of Gross Derivative Assets | 261 | 206
Fair Value of Gross Derivative Liabilities | 597 | 594
Customer-initiated and other activities | Caps and floors written |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 1,097 | 924
Fair Value of Gross Derivative Assets | 0 | 0
Fair Value of Gross Derivative Liabilities | 26 | 25
Customer-initiated and other activities | Caps and floors purchased |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 1,097 | 924
Fair Value of Gross Derivative Assets | 26 | 25
Fair Value of Gross Derivative Liabilities | 0 | 0
Customer-initiated and other activities | Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 22,440 | 18,450
Fair Value of Gross Derivative Assets | 235 | 181
Fair Value of Gross Derivative Liabilities | 571 | 569
Customer-initiated and other activities | Energy contracts |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 14,496 | 14,521
Fair Value of Gross Derivative Assets | 805 | 1,020
Fair Value of Gross Derivative Liabilities | 785 | 1,006
Customer-initiated and other activities | Caps and floors written |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 3,898 | 4,051
Fair Value of Gross Derivative Assets | 2 | 0
Fair Value of Gross Derivative Liabilities | 301 | 430
Customer-initiated and other activities | Caps and floors purchased |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 3,898 | 4,051
Fair Value of Gross Derivative Assets | 301 | 431
Fair Value of Gross Derivative Liabilities | 2 | 0
Customer-initiated and other activities | Swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 6,700 | 6,419
Fair Value of Gross Derivative Assets | 502 | 589
Fair Value of Gross Derivative Liabilities | 482 | 576
Customer-initiated and other activities | Spot, forwards, options and swaps |  |
Derivatives, Fair Value [Line Items] |  |
Notional/Contract Amount | 2,887 | 2,704
Fair Value of Gross Derivative Assets | 58 | 52
Fair Value of Gross Derivative Liabilities | $ 53 | $ 42

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