Securitization Activities - Amount of Financial Assets Securitized and Cash Flows Received on Retained Interests (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Servicing Assets at Fair Value [Line Items] | ||||
| Residential mortgages | $ 17,287 | $ 13,012 | $ 32,023 | $ 26,582 |
| Commercial mortgages | 6,801 | 4,393 | 11,629 | 8,839 |
| Other financial assets | 1,036 | 1,112 | 1,036 | 1,530 |
| Total financial assets securitized | 25,124 | 18,517 | 44,688 | 36,951 |
| Retained interests cash flows | $ 310 | $ 226 | $ 552 | $ 427 |