Equity Securities, Net Gains (Losses) from Equity Securities Not Held for Trading (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Equity Securities [Abstract] | ||
| Net losses from equity securities carried at fair value | $ (169) | $ (195) |
| Impairment write-downs | (115) | (194) |
| Net unrealized gains (losses) | 163 | 1 |
| Net realized gains (losses) | 293 | 45 |
| Total net gains (losses) from equity securities not carried at fair value | 341 | (148) |
| Total net gains (losses) from equity securities | $ 172 | $ (343) |