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Allowance For Credit Losses (Analysis Of The Allowance For Credit Losses By Portfolio Segment) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | $ 1,479 | $ 2,167 | $ 869 |  |
Cumulative change in accounting guidance |  |  |  |  | $ 438
loans and leases receivable allowance beginning balances |  |  |  | $ 1,307 |
Provision (credit) for loan losses | 248 | (493) | 1,312 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 9 | 60 |  |
Loan Losses: |  |  |  |  |
Charge-offs | (375) | (328) | (613) |  |
Recoveries | 112 | 124 | 101 |  |
Net loan losses | (263) | (204) | (512) |  |
Total allowance for loan losses | 1,464 | 1,479 | 2,167 |  |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 95 | 126 | 45 |  |
UnfundedcreditcommitmentsChangeinAccountingGuidance |  |  |  | 63 |
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL |  |  | 126 |  | 108
Provision (credit) for unfunded credit losses | 23 | (31) | 18 |  |
Reserve for unfunded credit commitments, end of year | 118 | 95 | 126 |  |
Allowance for Credit Losses, end of period | 1,582 | 1,574 | 2,293 |  |
Commercial Portfolio Segment [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | 682 | 1,196 | 537 |  |
Cumulative change in accounting guidance |  |  |  |  | (3)
loans and leases receivable allowance beginning balances |  |  |  | 534 |
Provision (credit) for loan losses | 40 | (445) | 927 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 0 | 60 |  |
Loan Losses: |  |  |  |  |
Charge-offs | (107) | (128) | (368) |  |
Recoveries | 50 | 59 | 43 |  |
Net loan losses | (57) | (69) | (325) |  |
Total allowance for loan losses | 665 | 682 | 1,196 |  |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 58 | 97 | 41 |  |
UnfundedcreditcommitmentsChangeinAccountingGuidance |  |  |  | 36 |
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL |  |  | 97 |  | 77
Provision (credit) for unfunded credit losses | 14 | (39) | 20 |  |
Reserve for unfunded credit commitments, end of year | 72 | 58 | 97 |  |
Allowance for Credit Losses, end of period | 737 | 740 | 1,293 |  |
Total Investor Real Estate [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | 79 | 183 | 45 |  |
Cumulative change in accounting guidance |  |  |  |  | 7
loans and leases receivable allowance beginning balances |  |  |  | 52 |
Provision (credit) for loan losses | 45 | (87) | 129 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 0 | 0 |  |
Loan Losses: |  |  |  |  |
Charge-offs | (5) | (20) | (1) |  |
Recoveries | 2 | 3 | 3 |  |
Net loan losses | (3) | (17) | 2 |  |
Total allowance for loan losses | 121 | 79 | 183 |  |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 8 | 14 | 4 |  |
UnfundedcreditcommitmentsChangeinAccountingGuidance |  |  |  | 13 |
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL |  |  | 14 |  | 17
Provision (credit) for unfunded credit losses | 13 | (6) | (3) |  |
Reserve for unfunded credit commitments, end of year | 21 | 8 | 14 |  |
Allowance for Credit Losses, end of period | 142 | 87 | 197 |  |
Consumer Portfolio Segment [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | 718 | 788 | 287 |  |
Cumulative change in accounting guidance |  |  |  |  | 434
loans and leases receivable allowance beginning balances |  |  |  | 721 |
Provision (credit) for loan losses | 163 | 39 | 256 |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 9 | 0 |  |
Loan Losses: |  |  |  |  |
Charge-offs | (263) | (180) | (244) |  |
Recoveries | 60 | 62 | 55 |  |
Net loan losses | (203) | (118) | (189) |  |
Total allowance for loan losses | 678 | 718 | 788 |  |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 29 | 15 | 0 |  |
UnfundedcreditcommitmentsChangeinAccountingGuidance |  |  |  | $ 14 |
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL |  |  | 15 |  | $ 14
Provision (credit) for unfunded credit losses | (4) | 14 | 1 |  |
Reserve for unfunded credit commitments, end of year | 25 | 29 | 15 |  |
Allowance for Credit Losses, end of period | $ 703 | $ 747 | $ 803 |  |

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