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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period |  |  | $ 16,258 |
Provision for credit losses | $ (2,714) | $ (2,482) | (16,513) | $ (9,074)
Benefit from expected recoveries of charged off loans |  |  | (3,647) | (2,197)
Allowance build (release) for credit losses |  |  | 6,800 |
Balance at the end of the period | 23,103 |  | 23,103 |
Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 23,873 | 16,649 | 16,258 | 15,296
Charge-offs | (4,941) | (3,427) | (12,916) | (10,061)
Recoveries | 1,468 | 823 | 3,647 | 2,197
Net charge-offs | (3,473) | (2,604) | (9,269) | (7,864)
Provision for credit losses | 2,713 | (2,470) | 16,521 | (9,091)
Initial allowance for purchased credit deteriorated loans |  |  | 2,870 |
Benefit from expected recoveries of charged off loans |  |  | (3,305) |
Allowance build (release) for credit losses | (760) | (134) | 6,817 | 1,227
Other changes | (10) | 19 | 28 | 11
Balance at the end of the period | 23,103 | 16,534 | 23,103 | 16,534
Reserve for unfunded lending commitments |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 135 | 129 | 143 | 158
Provision for credit losses | 0 | (13) | 8 | 16
Balance at the end of the period | 135 | 142 | 135 | 142
Combined allowance and reserve |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at the end of the period | 23,238 | 16,676 | 23,238 | 16,676
Credit Card: | Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 20,474 | 13,040 | 12,974 | 11,709
Charge-offs | (4,211) | (2,632) | (10,779) | (7,892)
Recoveries | 1,110 | 478 | 2,551 | 1,273
Net charge-offs | (3,101) | (2,154) | (8,228) | (6,619)
Provision for credit losses | 2,364 | (2,084) | 15,388 | (7,888)
Initial allowance for purchased credit deteriorated loans |  |  | 2,870 |
Benefit from expected recoveries of charged off loans |  |  | (3,305) |
Allowance build (release) for credit losses | (737) | (70) | 6,725 | 1,269
Other changes | (10) | 19 | 28 | 11
Balance at the end of the period | 19,727 | 12,989 | 19,727 | 12,989
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 | 19,727 | 12,989 | 19,727 | 12,989
Consumer Banking: | Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 1,864 | 2,065 | 1,884 | 2,042
Charge-offs | (669) | (707) | (1,957) | (2,003)
Recoveries | 343 | 306 | 1,058 | 869
Net charge-offs | (326) | (401) | (899) | (1,134)
Provision for credit losses | 340 | (351) | 893 | (1,107)
Initial allowance for purchased credit deteriorated loans |  |  | 0 |
Benefit from expected recoveries of charged off loans |  |  | 0 |
Allowance build (release) for credit losses | 14 | (50) | (6) | (27)
Other changes | 0 | 0 | 0 | 0
Balance at the end of the period | 1,878 | 2,015 | 1,878 | 2,015
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 | 1,878 | 2,015 | 1,878 | 2,015
Commercial Banking: | Allowance for credit losses |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 1,535 | 1,544 | 1,400 | 1,545
Charge-offs | (61) | (88) | (180) | (166)
Recoveries | 15 | 39 | 38 | 55
Net charge-offs | (46) | (49) | (142) | (111)
Provision for credit losses | 9 | (35) | 240 | (96)
Initial allowance for purchased credit deteriorated loans |  |  | 0 |
Benefit from expected recoveries of charged off loans |  |  | 0 |
Allowance build (release) for credit losses | (37) | (14) | 98 | (15)
Other changes | 0 | 0 | 0 | 0
Balance at the end of the period | 1,498 | 1,530 | 1,498 | 1,530
Commercial Banking: | Reserve for unfunded lending commitments |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of the period | 135 | 129 | 143 | 158
Provision for credit losses | 0 | (13) | 8 | 16
Balance at the end of the period | 135 | 142 | 135 | 142
Commercial Banking: | Combined allowance and reserve |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at the end of the period | $ 1,633 | $ 1,672 | $ 1,633 | $ 1,672

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- Definition Financing Receivable Allowance For Credit Loss Translation Adjustments And Purchase Credit Deteriorated Loans + References No definition available. + Details
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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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- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (4) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 + Details
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- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 + Details
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