v3.26.1
Securitization Activities - Firms Continuing Involvement in Securitization Entities to Which Firm Sold Assets (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Outstanding Principal Amount $ 196,709 $ 192,909
Retained Interests 6,932 6,458
Purchased Interests 94 90
Retained interest 6,810 6,370
U.S. agency obligations    
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Outstanding Principal Amount 68,026 62,433
Retained Interests 3,599 3,169
Purchased Interests 0 0
Residential mortgages    
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Outstanding Principal Amount 40,339 38,605
Retained Interests 1,715 1,630
Purchased Interests 54 37
Commercial mortgages    
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Outstanding Principal Amount 75,365 77,967
Retained Interests 1,145 1,148
Purchased Interests 31 39
Corporate debt and other asset-backed    
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Outstanding Principal Amount 12,979 13,904
Retained Interests 473 511
Purchased Interests $ 9 $ 14