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Securitization Activities - Firms Continuing Involvement in Securitization Entities to Which Firm Sold Assets (Detail) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Outstanding Principal Amount | $ 172,984 | $ 138,739
Retained Interests | 7,240 | 5,848
Purchased Interests | 86 | 76
Retained interest | 7,190 | 5,780
U.S. agency obligations |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Outstanding Principal Amount | 54,899 | 34,049
Retained Interests | 4,120 | 3,053
Purchased Interests | 0 | 0
Residential mortgages |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Outstanding Principal Amount | 36,532 | 33,069
Retained Interests | 1,514 | 1,357
Purchased Interests | 23 | 14
Commercial mortgages |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Outstanding Principal Amount | 68,325 | 59,562
Retained Interests | 1,106 | 945
Purchased Interests | 44 | 57
Corporate debt and other asset-backed |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Outstanding Principal Amount | 13,228 | 12,059
Retained Interests | 500 | 493
Purchased Interests | $ 19 | $ 5

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- Definition Purchased interests in securitization entities in which the firm also holds retained interests. + References No definition available. + Details
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- Definition Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition The carrying amount (fair value) as of the balance sheet date of the transferor's interests in transferred financial assets (typically securitized receivables, generally not involved in the collection of principal) following transfer of significant portions of such financial instruments to other parties. Such interests could be ancillary cash flows and interest-only strips. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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