Commitments, Contingent Liabilities and Guarantees - Summary of Significant Commitments (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Commitments to extend credit | ||
| Long-term Purchase Commitment | ||
| Commitments | $ 114,164 | $ 84,405 |
| Letters of credit | ||
| Long-term Purchase Commitment | ||
| Commitments | 6,248 | 2,095 |
| Forward contracts related to residential mortgage loans measured at fair value | ||
| Long-term Purchase Commitment | ||
| Commitments | 1,021 | 1,072 |
| Capital commitments for private equity investments | ||
| Long-term Purchase Commitment | ||
| Commitments | 354 | 310 |
| Capital expenditures | ||
| Long-term Purchase Commitment | ||
| Commitments | $ 223 | $ 147 |