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Credit Quality And Allowance For Credit Losses (Aging Analysis Of Loans) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | $ 178 |  | $ 240
Total loans |  | 52,113 |  | 53,402
Loans past due and still accruing |  | 218 |  | 401
Current loans |  | 51,717 |  | 52,761
30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 161 |  | 341
60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 37 |  | 37
90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 20 |  | 23
Real estate construction loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 5,083 |  | 3,105
Real estate construction loans | Commercial Real Estate business line |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 4,570 |  | 2,505
Real estate construction loans | Other Business Lines Member |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 513 |  | 600
Commercial mortgage |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 13,686 |  | 13,306
Commercial mortgage | Commercial Real Estate business line |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 4,727 |  | 4,681
Commercial mortgage | Other Business Lines Member |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 8,959 |  | 8,625
Total commercial real estate |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total loans |  | 18,769 |  | 16,411
Business loans | Commercial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 138 |  | 171
Total loans |  | 47,929 |  | 49,277
Loans past due and still accruing |  | 155 |  | 366
Current loans |  | 47,636 |  | 48,740
Business loans | Commercial | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 109 |  | 310
Business loans | Commercial | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 26 |  | 33
Business loans | Commercial | 90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 20 |  | 23
Business loans | Commercial | Domestic loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 75 |  | 142
Total loans |  | 27,251 |  | 30,909
Loans past due and still accruing |  | 72 |  | 271
Current loans |  | 27,104 |  | 30,496
Business loans | Commercial | Domestic loans | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 48 |  | 238
Business loans | Commercial | Domestic loans | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 14 |  | 13
Business loans | Commercial | Domestic loans | 90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 10 |  | 20
Business loans | Commercial | International loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 20 |  | 3
Total loans |  | 1,102 |  | 1,197
Loans past due and still accruing |  | 1 |  | 9
Current loans |  | 1,081 |  | 1,185
Business loans | Commercial | International loans | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 |  | 0
Business loans | Commercial | International loans | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 |  | 9
Business loans | Commercial | International loans | 90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 1 |  | 0
Business loans | Commercial | Real estate construction loans | Domestic loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 2 |  | 3
Total loans |  | 5,083 |  | 3,105
Loans past due and still accruing |  | 3 |  | 2
Current loans |  | 5,078 |  | 3,100
Business loans | Commercial | Real estate construction loans | Domestic loans | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 3 |  | 2
Business loans | Commercial | Real estate construction loans | 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 | Real estate construction loans | 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
Business loans | Commercial | Real estate construction loans | Domestic loans | Commercial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 0 | [1] | 0
Total loans | [1] | 4,570 |  | 2,505
Loans past due and still accruing | [1] | 0 |  | 0
Current loans |  | 4,570 |  | 2,505
Business loans | Commercial | Real estate construction loans | Domestic loans | Commercial | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 | [1] | 0
Business loans | Commercial | Real estate construction loans | Domestic loans | Commercial | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 | [1] | 0
Business loans | Commercial | Real estate construction loans | Domestic loans | Commercial | 90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 | [1] | 0
Business loans | Commercial | Real estate construction loans | Domestic loans | Other business lines |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 2 |  | 3
Total loans | [2] | 513 |  | 600
Loans past due and still accruing | [2] | 3 |  | 2
Current loans |  | 508 |  | 595
Business loans | Commercial | Real estate construction loans | 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 |  | 2
Business loans | Commercial | Real estate construction loans | 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 |  | 0 |  | 0
Business loans | Commercial | Real estate construction loans | 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 |  | 0 |  | 0
Business loans | Commercial | Commercial mortgage | Domestic loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 41 |  | 23
Total loans |  | 13,686 |  | 13,306
Loans past due and still accruing |  | 75 |  | 78
Current loans |  | 13,570 |  | 13,205
Business loans | Commercial | 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 |  | 54 |  | 64
Business loans | Commercial | 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 |  | 12 |  | 11
Business loans | Commercial | 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 |  | 9 |  | 3
Business loans | Commercial | Commercial mortgage | Domestic loans | Commercial |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans | [3] | 18 |  | 1
Total loans | [1] | 4,727 |  | 4,681
Loans past due and still accruing | [1] | 5 |  | 6
Current loans |  | 4,704 |  | 4,674
Business loans | Commercial | Commercial mortgage | Domestic loans | Commercial | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 5 |  | 0
Business loans | Commercial | Commercial mortgage | Domestic loans | Commercial | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 |  | 6
Business loans | Commercial | Commercial mortgage | Domestic loans | Commercial | 90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 0 |  | 0
Business loans | Commercial | Commercial mortgage | Domestic loans | Other business lines |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 23 |  | 22
Total loans | [2] | 8,959 |  | 8,625
Loans past due and still accruing | [2] | 70 |  | 72
Current loans |  | 8,866 |  | 8,531
Business loans | Commercial | 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 |  | 49 |  | 64
Business loans | Commercial | 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 |  | 12 |  | 5
Business loans | Commercial | 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 |  | 9 |  | 3
Business loans | Commercial | Lease financing | Domestic loans |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 0 |  | 0
Total loans |  | 807 |  | 760
Loans past due and still accruing |  | 4 |  | 6
Current loans |  | 803 |  | 754
Business loans | Commercial | 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 |  | 4 |  | 6
Business loans | Commercial | 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 | 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] |  |  |  |
Total Nonaccrual Loans |  | 40 |  | 69
Total loans |  | 4,184 |  | 4,125
Loans past due and still accruing |  | 63 |  | 35
Current loans |  | 4,081 |  | 4,021
Retail loans | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 52 |  | 31
Retail loans | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 11 |  | 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 |  | 0
Retail loans | Residential mortgage |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 19 |  | 53
Total loans |  | 1,889 |  | 1,814
Loans past due and still accruing |  | 16 |  | 22
Current loans |  | 1,854 |  | 1,739
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 |  | 10 |  | 22
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 |  | 6 |  | 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 | Consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 21 |  | 16
Total loans |  | 2,295 |  | 2,311
Loans past due and still accruing |  | 47 |  | 13
Current loans |  | 2,227 |  | 2,282
Retail loans | Consumer | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 42 |  | 9
Retail loans | Consumer | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 5 |  | 4
Retail loans | Consumer | 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 | Consumer | Home equity |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 21 |  | 15
Total loans |  | 1,792 |  | 1,776
Loans past due and still accruing |  | 16 |  | 7
Current loans |  | 1,755 |  | 1,754
Retail loans | Consumer | Home equity | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 11 |  | 4
Retail loans | Consumer | Home equity | 60 to 89 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 5 |  | 3
Retail loans | Consumer | 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 | Consumer | Other consumer |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 0 |  | 1
Total loans |  | 503 |  | 535
Loans past due and still accruing |  | 31 |  | 6
Current loans |  | 472 |  | 528
Retail loans | Consumer | Other consumer | 30 to 59 days past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | 31 |  | 5
Retail loans | Consumer | 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 | Consumer | Other consumer | 90 days or more past due and still accruing |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans past due and still accruing |  | $ 0 |  | $ 0
[1] | Primarily loans to real estate developers.
[2] | Primarily loans secured by owner-occupied real estate.
[3] | Primarily loans secured by owner-occupied real estate.

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