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Loans and Related Allowance for Credit Losses (Commercial Lending Asset Quality Indicators) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Total loans, net | [1] | $ 321,381 |  | $ 321,381 |  | $ 321,508
Gross charge-offs |  |  |  |  |  |
Total |  | 376 | $ 233 | 1,081 | $ 808 |
Commercial |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 20,398 |  | 20,398 |  | 29,806
Year two |  | 24,293 |  | 24,293 |  | 39,814
Year three |  | 31,472 |  | 31,472 |  | 12,512
Year four |  | 10,025 |  | 10,025 |  | 9,535
Year five |  | 7,901 |  | 7,901 |  | 10,387
Prior |  | 27,477 |  | 27,477 |  | 23,271
Revolving Loans |  | 98,431 |  | 98,431 |  | 93,609
Revolving Loans Converted to Term |  | 724 |  | 724 |  | 624
Total loans, net |  | 220,721 |  | 220,721 |  | 219,558
Gross charge-offs |  |  |  |  |  |
Year one |  |  |  | 16 |  | 29
Year two |  |  |  | 33 |  | 36
Year three |  |  |  | 51 |  | 37
Year four |  |  |  | 28 |  | 24
Year five |  |  |  | 8 |  | 35
Prior |  |  |  | 272 |  | 164
Revolving Loans |  |  |  | 86 |  | 105
Revolving Loans Converted to Term |  |  |  | 52 |  | 12
Total |  | 200 | $ 72 | 546 | $ 327 | 442
Commercial | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 17,270 |  | 17,270 |  | 23,857
Year two |  | 17,198 |  | 17,198 |  | 28,438
Year three |  | 20,619 |  | 20,619 |  | 8,301
Year four |  | 6,408 |  | 6,408 |  | 6,114
Year five |  | 5,120 |  | 5,120 |  | 4,391
Prior |  | 13,590 |  | 13,590 |  | 12,680
Revolving Loans |  | 98,022 |  | 98,022 |  | 93,175
Revolving Loans Converted to Term |  | 664 |  | 664 |  | 624
Total loans, net |  | 178,891 |  | 178,891 |  | 177,580
Gross charge-offs |  |  |  |  |  |
Year one |  |  |  | 16 |  | 25
Year two |  |  |  | 23 |  | 32
Year three |  |  |  | 43 |  | 33
Year four |  |  |  | 22 |  | 8
Year five |  |  |  | 4 |  | 3
Prior |  |  |  | 4 |  | 26
Revolving Loans |  |  |  | 86 |  | 105
Revolving Loans Converted to Term |  |  |  | 52 |  | 12
Total |  |  |  | 250 |  | 244
Commercial | Commercial real estate |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 1,815 |  | 1,815 |  | 4,337
Year two |  | 5,672 |  | 5,672 |  | 9,871
Year three |  | 9,565 |  | 9,565 |  | 3,441
Year four |  | 3,012 |  | 3,012 |  | 2,680
Year five |  | 2,216 |  | 2,216 |  | 5,509
Prior |  | 12,355 |  | 12,355 |  | 9,164
Revolving Loans |  | 409 |  | 409 |  | 434
Revolving Loans Converted to Term |  | 60 |  | 60 |  |
Total loans, net |  | 35,104 |  | 35,104 |  | 35,436
Gross charge-offs |  |  |  |  |  |
Year one |  |  |  |  |  |
Year two |  |  |  | 5 |  |
Year three |  |  |  |  |  |
Year four |  |  |  | 2 |  | 12
Year five |  |  |  | 1 |  | 31
Prior |  |  |  | 263 |  | 137
Revolving Loans |  |  |  |  |  |
Revolving Loans Converted to Term |  |  |  |  |  |
Total |  |  |  | 271 |  | 180
Commercial | Equipment lease financing |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 1,313 |  | 1,313 |  | 1,612
Year two |  | 1,423 |  | 1,423 |  | 1,505
Year three |  | 1,288 |  | 1,288 |  | 770
Year four |  | 605 |  | 605 |  | 741
Year five |  | 565 |  | 565 |  | 487
Prior |  | 1,532 |  | 1,532 |  | 1,427
Revolving Loans |  |  |  |  |  |
Revolving Loans Converted to Term |  |  |  |  |  |
Total loans, net |  | 6,726 |  | 6,726 |  | 6,542
Gross charge-offs |  |  |  |  |  |
Year one |  |  |  |  |  | 4
Year two |  |  |  | 5 |  | 4
Year three |  |  |  | 8 |  | 4
Year four |  |  |  | 4 |  | 4
Year five |  |  |  | 3 |  | 1
Prior |  |  |  | 5 |  | 1
Revolving Loans |  |  |  |  |  |
Revolving Loans Converted to Term |  |  |  |  |  |
Total |  |  |  | 25 |  | 18
Pass Rated | Commercial | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 16,786 |  | 16,786 |  | 23,019
Year two |  | 16,119 |  | 16,119 |  | 26,657
Year three |  | 18,362 |  | 18,362 |  | 7,562
Year four |  | 5,682 |  | 5,682 |  | 5,783
Year five |  | 4,954 |  | 4,954 |  | 4,110
Prior |  | 12,864 |  | 12,864 |  | 11,982
Revolving Loans |  | 92,692 |  | 92,692 |  | 88,467
Revolving Loans Converted to Term |  | 600 |  | 600 |  | 573
Total loans, net |  | 168,059 |  | 168,059 |  | 168,153
Pass Rated | Commercial | Commercial real estate |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 1,717 |  | 1,717 |  | 4,182
Year two |  | 5,419 |  | 5,419 |  | 8,571
Year three |  | 7,664 |  | 7,664 |  | 2,986
Year four |  | 2,514 |  | 2,514 |  | 2,190
Year five |  | 1,763 |  | 1,763 |  | 4,887
Prior |  | 10,273 |  | 10,273 |  | 7,411
Revolving Loans |  | 390 |  | 390 |  | 383
Revolving Loans Converted to Term |  | 9 |  | 9 |  |
Total loans, net |  | 29,749 |  | 29,749 |  | 30,610
Pass Rated | Commercial | Equipment lease financing |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 1,267 |  | 1,267 |  | 1,522
Year two |  | 1,318 |  | 1,318 |  | 1,424
Year three |  | 1,206 |  | 1,206 |  | 689
Year four |  | 544 |  | 544 |  | 690
Year five |  | 538 |  | 538 |  | 452
Prior |  | 1,496 |  | 1,496 |  | 1,378
Revolving Loans |  |  |  |  |  |
Revolving Loans Converted to Term |  |  |  |  |  |
Total loans, net |  | 6,369 |  | 6,369 |  | 6,155
Criticized | Commercial | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 484 |  | 484 |  | 838
Year two |  | 1,079 |  | 1,079 |  | 1,781
Year three |  | 2,257 |  | 2,257 |  | 739
Year four |  | 726 |  | 726 |  | 331
Year five |  | 166 |  | 166 |  | 281
Prior |  | 726 |  | 726 |  | 698
Revolving Loans |  | 5,330 |  | 5,330 |  | 4,708
Revolving Loans Converted to Term |  | 64 |  | 64 |  | 51
Total loans, net |  | 10,832 |  | 10,832 |  | 9,427
Criticized | Commercial | Commercial real estate |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 98 |  | 98 |  | 155
Year two |  | 253 |  | 253 |  | 1,300
Year three |  | 1,901 |  | 1,901 |  | 455
Year four |  | 498 |  | 498 |  | 490
Year five |  | 453 |  | 453 |  | 622
Prior |  | 2,082 |  | 2,082 |  | 1,753
Revolving Loans |  | 19 |  | 19 |  | 51
Revolving Loans Converted to Term |  | 51 |  | 51 |  |
Total loans, net |  | 5,355 |  | 5,355 |  | 4,826
Criticized | Commercial | Equipment lease financing |  |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |
Year one |  | 46 |  | 46 |  | 90
Year two |  | 105 |  | 105 |  | 81
Year three |  | 82 |  | 82 |  | 81
Year four |  | 61 |  | 61 |  | 51
Year five |  | 27 |  | 27 |  | 35
Prior |  | 36 |  | 36 |  | 49
Revolving Loans |  |  |  |  |  |
Revolving Loans Converted to Term |  |  |  |  |  |
Total loans, net |  | $ 357 |  | $ 357 |  | $ 387
[1] | Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $0.7 billion, Loans held for investment of $1.2 billion and Other assets of $0.1 billion at September 30, 2024. Comparable amounts at December 31, 2023 were $0.7 billion, $1.2 billion and $0.1 billion, respectively.

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