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Allowance For Credit Losses (Analysis Of The Allowance For Credit Losses By Portfolio Segment) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | $ 1,513 | $ 1,425 | $ 1,464 | $ 1,479 |
Cumulative change in accounting guidance |  |  |  |  | $ (38)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  |  |  |  | 1,426
Provision (credit) for loan losses | 135 | 103 | 386 | 133 |
Loan Losses: |  |  |  |  |
Charge-offs | (124) | (135) | (341) | (282) |
Recoveries | 23 | 25 | 76 | 88 |
Net loan losses | (101) | (110) | (265) | (194) |
Total allowance for loan losses | 1,547 | 1,418 | 1,547 | 1,418 |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 120 | 89 | 118 | 95 |
Provision (credit) for unfunded credit losses | 10 | 32 | 12 | 26 |
Reserve for unfunded credit commitments, end of year | 130 | 121 | 130 | 121 |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,677 | 1,539 | 1,677 | 1,539 |
Commercial Portfolio Segment [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | 708 | 597 | 665 | 682 |
Cumulative change in accounting guidance |  |  |  |  | (3)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  |  |  |  | 662
Provision (credit) for loan losses | 25 | 78 | 141 | 15 |
Loan Losses: |  |  |  |  |
Charge-offs | (54) | (20) | (155) | (68) |
Recoveries | 13 | 13 | 44 | 39 |
Net loan losses | (41) | (7) | (111) | (29) |
Total allowance for loan losses | 692 | 668 | 692 | 668 |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 82 | 57 | 72 | 58 |
Provision (credit) for unfunded credit losses | 8 | 10 | 18 | 9 |
Reserve for unfunded credit commitments, end of year | 90 | 67 | 90 | 67 |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 782 | 735 | 782 | 735 |
Total Investor Real Estate [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | 151 | 91 | 121 | 79 |
Cumulative change in accounting guidance |  |  |  |  | (3)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  |  |  |  | 118
Provision (credit) for loan losses | 17 | 8 | 50 | 19 |
Loan Losses: |  |  |  |  |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 1 |
Net loan losses | 0 | 0 | 0 | 1 |
Total allowance for loan losses | 168 | 99 | 168 | 99 |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 19 | 10 | 21 | 8 |
Provision (credit) for unfunded credit losses | 0 | 7 | (2) | 9 |
Reserve for unfunded credit commitments, end of year | 19 | 17 | 19 | 17 |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 187 | 116 | 187 | 116 |
Consumer Portfolio Segment [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Allowance for loan losses, beginning of period | 654 | 737 | 678 | 718 |
Cumulative change in accounting guidance |  |  |  |  | (32)
LoanandLeaseReceivableAllowanceBeginningBalanceadjustedforchangeinaccountingguidance |  |  |  |  | $ 646
Provision (credit) for loan losses | 93 | 17 | 195 | 99 |
Loan Losses: |  |  |  |  |
Charge-offs | (70) | (115) | (186) | (214) |
Recoveries | 10 | 12 | 32 | 48 |
Net loan losses | (60) | (103) | (154) | (166) |
Total allowance for loan losses | 687 | 651 | 687 | 651 |
Reserve For Unfunded Credit Commitments [Roll Forward] |  |  |  |  |
Reserve for unfunded credit commitments, beginning of year | 19 | 22 | 25 | 29 |
Provision (credit) for unfunded credit losses | 2 | 15 | (4) | 8 |
Reserve for unfunded credit commitments, end of year | 21 | 37 | 21 | 37 |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 708 | $ 688 | $ 708 | $ 688 |

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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