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Credit Quality And Allowance For Credit Losses (Changes In The Allowance For Loan Losses And Related Loan Amounts) (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 683 |  | $ 690 |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Current |  |  | 725 | $ 728
Provision for credit losses | 20 | $ 14 |  |
Financing receivable, allowance for credit loss, excluding accrued interest, end of period | $ 719 | $ 728 |  |
As a percentage of total loans | 1.44% | 1.43% |  |
Financing Receivable |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 683 | $ 691 | 690 | 688
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 32 | 21 |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery | 6 | 7 |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery) | 26 | 14 |  |
Provision for credit losses | $ 19 | $ 17 |  |
As a percentage of total loans | 1.37% | 1.36% |  |
Unused Commitments to Extend Credit |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 36 | $ 37 | 35 | 40
Provision for credit losses | 1 | (3) |  |
Business loans: |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 659 | 654 | 653 | 651
Provision for credit losses | $ 31 | $ 17 |  |
As a percentage of total loans | 1.44% | 1.40% |  |
Business loans: | Financing Receivable |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 634 | $ 626 | 625 | 620
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 31 | 20 |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery | 6 | 6 |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery) | 25 | 14 |  |
Provision for credit losses | $ 34 | $ 20 |  |
As a percentage of total loans | 1.38% | 1.34% |  |
Business loans: | Unused Commitments to Extend Credit |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 25 | $ 28 | 28 | 31
Provision for credit losses | (3) | (3) |  |
Retail loans: |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 60 | 74 | 72 | 77
Provision for credit losses | $ (11) | $ (3) |  |
As a percentage of total loans | 1.46% | 1.82% |  |
Retail loans: | Financing Receivable |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 49 | $ 65 | 65 | 68
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 1 | 1 |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery | 0 | 1 |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery) | 1 | 0 |  |
Provision for credit losses | $ (15) | $ (3) |  |
As a percentage of total loans | 1.19% | 1.59% |  |
Retail loans: | Unused Commitments to Extend Credit |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 11 | $ 9 | $ 7 | $ 9
Provision for credit losses | $ 4 | $ 0 |  |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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