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Allowance for Credit Losses and Reserve for Unfunded Lending Commitments - Allowance for Credit Losses and Reserve for Unfunded Lending Commitments Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  | $ 15,296 |
Provision for credit losses | $ 3,909 | $ 2,490 | 6,592 | $ 5,285
Balance at the end of the period | 16,649 |  | 16,649 |
Translation adjustment and purchase credit deteriorated loans |  |  | 0 | 32
Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 15,380 | 14,318 | 15,296 | 13,240
Charge-offs | (3,361) | (2,772) | (6,634) | (5,015)
Recoveries | 717 | 587 | 1,374 | 1,133
Net charge-offs | (2,644) | (2,185) | (5,260) | (3,882)
Provision for credit losses | 3,914 | 2,503 | 6,621 | 5,305
Allowance build (release) for credit losses | 1,270 | 318 | 1,361 | 1,423
Other changes | (1) | 10 | (8) | 46
Balance at the end of the period | 16,649 | 14,646 | 16,649 | 14,646
Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | (63)
Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | 13,177
Reserve for unfunded lending commitments |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 134 | 211 | 158 | 218
Provision for credit losses | (5) | (14) | (29) | (21)
Balance at the end of the period | 129 | 197 | 129 | 197
Combined allowance and reserve |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at the end of the period | 16,778 | 14,843 | 16,778 | 14,843
Credit Card: | Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 11,754 | 10,410 | 11,709 | 9,545
Charge-offs | (2,686) | (1,868) | (5,260) | (3,556)
Recoveries | 428 | 340 | 795 | 659
Net charge-offs | (2,258) | (1,528) | (4,465) | (2,897)
Provision for credit losses | 3,545 | 2,084 | 5,804 | 4,345
Allowance build (release) for credit losses | 1,287 | 556 | 1,339 | 1,448
Other changes | (1) | 10 | (8) | 46
Balance at the end of the period | 13,040 | 10,976 | 13,040 | 10,976
Credit Card: | Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | (63)
Credit Card: | Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | 9,482
Credit Card: | Reserve for unfunded lending commitments |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 0 | 0 | 0 | 0
Provision for credit losses | 0 | 0 | 0 | 0
Balance at the end of the period | 0 | 0 | 0 | 0
Credit Card: | Combined allowance and reserve |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at the end of the period | 13,040 | 10,976 | 13,040 | 10,976
Consumer Banking: | Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 2,088 | 2,205 | 2,042 | 2,237
Charge-offs | (636) | (526) | (1,296) | (1,057)
Recoveries | 283 | 247 | 563 | 471
Net charge-offs | (353) | (279) | (733) | (586)
Provision for credit losses | 330 | 259 | 756 | 534
Allowance build (release) for credit losses | (23) | (20) | 23 | (52)
Other changes | 0 | 0 | 0 | 0
Balance at the end of the period | 2,065 | 2,185 | 2,065 | 2,185
Consumer Banking: | Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | 0
Consumer Banking: | Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | 2,237
Consumer Banking: | Reserve for unfunded lending commitments |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 0 | 0 | 0 | 0
Provision for credit losses | 0 | 0 | 0 | 0
Balance at the end of the period | 0 | 0 | 0 | 0
Consumer Banking: | Combined allowance and reserve |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at the end of the period | 2,065 | 2,185 | 2,065 | 2,185
Commercial Banking: | Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 1,538 | 1,703 | 1,545 | 1,458
Charge-offs | (39) | (378) | (78) | (402)
Recoveries | 6 | 0 | 16 | 3
Net charge-offs | (33) | (378) | (62) | (399)
Provision for credit losses | 39 | 160 | 61 | 426
Allowance build (release) for credit losses | 6 | (218) | (1) | 27
Other changes | 0 | 0 | 0 | 0
Balance at the end of the period | 1,544 | 1,485 | 1,544 | 1,485
Commercial Banking: | Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | 0
Commercial Banking: | Allowance for credit losses | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  |  | 1,458
Commercial Banking: | Reserve for unfunded lending commitments |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 134 | 211 | 158 | 218
Provision for credit losses | (5) | (14) | (29) | (21)
Balance at the end of the period | 129 | 197 | 129 | 197
Commercial Banking: | Combined allowance and reserve |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at the end of the period | 1,673 | $ 1,682 | $ 1,673 | $ 1,682
Domestic Credit Card Portfolio Segment |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Allowance build (release) for credit losses | $ 826 |  |  |

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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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