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Credit Quality And Allowance For Credit Losses (Aging Analysis Of Loans) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | $ 220 | $ 180
Nonaccrual loans |  | 262 | 264
Current loans | [1] | 50,972 | 48,841
Total loans |  | 51,454 | 49,285
30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 188 | 118
60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 20 | 35
90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 12 | 27
Business loans | Commercial borrower |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 190 | 132
Nonaccrual loans |  | 199 | 216
Current loans | [1] | 47,134 | 45,069
Total loans |  | 47,523 | 45,417
Business loans | Commercial borrower | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 160 | 78
Business loans | Commercial borrower | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 18 | 31
Business loans | Commercial borrower | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 12 | 23
Business loans | Commercial borrower | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 62 | 59
Nonaccrual loans |  | 161 | 173
Current loans | [1] | 31,036 | 29,134
Total loans |  | 31,259 | 29,366
Business loans | Commercial borrower | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 51 | 35
Business loans | Commercial borrower | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 9 | 18
Business loans | Commercial borrower | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 2 | 6
Business loans | Commercial borrower | International loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 4 | 14
Nonaccrual loans |  | 5 | 5
Current loans | [1] | 1,282 | 1,189
Total loans |  | 1,291 | 1,208
Business loans | Commercial borrower | International loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 5
Business loans | Commercial borrower | International loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 8
Business loans | Commercial borrower | International loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 4 | 1
Business loans | Commercial borrower | Real estate construction | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 7 | 16
Nonaccrual loans |  | 4 | 6
Current loans | [1] | 2,454 | 2,926
Total loans |  | 2,465 | 2,948
Business loans | Commercial borrower | Real estate construction | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 2 | 15
Business loans | Commercial borrower | Real estate construction | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 1 | 1
Business loans | Commercial borrower | Real estate construction | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 4 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 2 | 0
Nonaccrual loans | [2] | 0 | 0
Current loans | [1],[2] | 1,947 | 2,391
Total loans | [2] | 1,949 | 2,391
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 2 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 0 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Commercial Real Estate business line | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 0 | 0
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 5 | 16
Nonaccrual loans | [3] | 4 | 6
Current loans | [1],[3] | 507 | 535
Total loans | [3] | 516 | 557
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 0 | 15
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 1 | 1
Business loans | Commercial borrower | Real estate construction | Domestic loans | Other business lines | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 4 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 111 | 38
Nonaccrual loans |  | 29 | 32
Current loans | [1] | 11,715 | 11,185
Total loans |  | 11,855 | 11,255
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 101 | 18
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 8 | 4
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 2 | 16
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 41 | 0
Nonaccrual loans | [2] | 1 | 1
Current loans | [1],[2] | 3,605 | 3,337
Total loans | [2] | 3,647 | 3,338
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 41 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 0 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Commercial Real Estate business line | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [2] | 0 | 0
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 70 | 38
Nonaccrual loans | [3] | 28 | 31
Current loans | [1],[3] | 8,110 | 7,848
Total loans | [3] | 8,208 | 7,917
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 60 | 18
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 8 | 4
Business loans | Commercial borrower | Commercial mortgage | Domestic loans | Other business lines | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing | [3] | 2 | 16
Business loans | Commercial borrower | Lease financing | Domestic loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 6 | 5
Nonaccrual loans |  | 0 | 0
Current loans | [1] | 647 | 635
Total loans |  | 653 | 640
Business loans | Commercial borrower | Lease financing | Domestic loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 6 | 5
Business loans | Commercial borrower | Lease financing | Domestic loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 0
Business loans | Commercial borrower | Lease financing | Domestic loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 0
Retail loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 30 | 48
Nonaccrual loans |  | 63 | 48
Current loans | [1] | 3,838 | 3,772
Total loans |  | 3,931 | 3,868
Retail loans | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 28 | 40
Retail loans | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 2 | 4
Retail loans | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 4
Retail loans | Residential mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 22 | 4
Nonaccrual loans |  | 49 | 36
Current loans | [1] | 1,682 | 1,731
Total loans |  | 1,753 | 1,771
Retail loans | Residential mortgage | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 21 | 4
Retail loans | Residential mortgage | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 1 | 0
Retail loans | Residential mortgage | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 0
Retail loans | Home equity |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 8 | 44
Nonaccrual loans |  | 14 | 12
Current loans | [1] | 2,156 | 2,041
Total loans |  | 2,178 | 2,097
Retail loans | Home equity | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 7 | 36
Retail loans | Home equity | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 1 | 4
Retail loans | Home equity | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 4
Retail loans | Home equity | Home equity |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 4 | 7
Nonaccrual loans |  | 13 | 12
Current loans | [1] | 1,615 | 1,514
Total loans |  | 1,632 | 1,533
Retail loans | Home equity | Home equity | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 3 | 4
Retail loans | Home equity | Home equity | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 1 | 3
Retail loans | Home equity | Home equity | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 0
Retail loans | Home equity | Other consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 4 | 37
Nonaccrual loans |  | 1 | 0
Current loans | [1] | 541 | 527
Total loans |  | 546 | 564
Retail loans | Home equity | Other consumer | 30 to 59 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 4 | 32
Retail loans | Home equity | Other consumer | 60 to 89 days past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | 0 | 1
Retail loans | Home equity | Other consumer | 90 days or more past due and still accruing |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans past due and still accruing |  | $ 0 | $ 4
[1] | Includes $22 million of loans with deferred payments not considered past due in accordance with the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) at December 31, 2021.
[2] | Primarily loans to real estate developers.
[3] | Primarily loans secured by owner-occupied real estate.

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