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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 599 | $ 807 | $ 618 | $ 992
Provision for credit losses | 10 | (135) | (1) | (317)
Balance at end of period | $ 609 | $ 683 | $ 609 | $ 683
As a percentage of total loans | 1.18% | 1.36% | 1.18% | 1.36%
Financing Receivable |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 554 | $ 777 | $ 588 | $ 948
Loan charge-offs | (13) | (8) | (31) | (24)
Recoveries on loans previously charged-off | 13 | 19 | 23 | 32
Net loan (charge-offs) recoveries | 0 | 11 | (8) | 8
Provision for credit losses | 9 | (136) | (17) | (304)
Balance at end of period | $ 563 | $ 652 | $ 563 | $ 652
As a percentage of total loans | 1.09% | 1.30% | 1.09% | 1.30%
Unused Commitments to Extend Credit |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 45 | $ 30 | $ 30 | $ 44
Provision for credit losses | 1 | 1 | 16 | (13)
Balance at end of period | 46 | 31 | 46 | 31
Business loans |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | 526 | 731 | 555 | 930
Provision for credit losses | 11 | (130) | (10) | (326)
Balance at end of period | $ 536 | $ 613 | $ 536 | $ 613
As a percentage of total loans | 1.13% | 1.32% | 1.13% | 1.32%
Business loans | Financing Receivable |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 493 | $ 709 | $ 531 | $ 895
Loan charge-offs | (13) | (7) | (30) | (22)
Recoveries on loans previously charged-off | 12 | 19 | 21 | 31
Net loan (charge-offs) recoveries | (1) | 12 | (9) | 9
Provision for credit losses | 10 | (132) | (20) | (315)
Balance at end of period | $ 502 | $ 589 | $ 502 | $ 589
As a percentage of total loans | 1.06% | 1.27% | 1.06% | 1.27%
Business loans | Unused Commitments to Extend Credit |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 33 | $ 22 | $ 24 | $ 35
Provision for credit losses | 1 | 2 | 10 | (11)
Balance at end of period | 34 | 24 | 34 | 24
Retail loans |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | 73 | 76 | 63 | 62
Provision for credit losses | (1) | (5) | 9 | 9
Balance at end of period | $ 73 | $ 70 | $ 73 | $ 70
As a percentage of total loans | 1.85% | 1.80% | 1.85% | 1.80%
Retail loans | Financing Receivable |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 61 | $ 68 | $ 57 | $ 53
Loan charge-offs | 0 | (1) | (1) | (2)
Recoveries on loans previously charged-off | 1 | 0 | 2 | 1
Net loan (charge-offs) recoveries | 1 | (1) | 1 | (1)
Provision for credit losses | (1) | (4) | 3 | 11
Balance at end of period | $ 61 | $ 63 | $ 61 | $ 63
As a percentage of total loans | 1.55% | 1.63% | 1.55% | 1.63%
Retail loans | Unused Commitments to Extend Credit |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Balance at beginning of period | $ 12 | $ 8 | $ 6 | $ 9
Provision for credit losses | 0 | (1) | 6 | (2)
Balance at end of period | $ 12 | $ 7 | $ 12 | $ 7

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