Equity Securities, Net Gains (Losses) from Measurement Alternative Equity Securities (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Net Gains (Losses) from Measurement Alternative Equity Securities | ||||
| Total net gains (losses) from equity securities not carried at fair value | $ 596 | $ (36) | $ 937 | $ (184) |
| Measurement alternative [Member] | Not held for trading [Member] | ||||
| Net Gains (Losses) from Measurement Alternative Equity Securities | ||||
| Gross unrealized gains from observable price changes | 656 | 64 | 827 | 107 |
| Gross unrealized losses from observable price changes | 0 | (19) | 0 | (44) |
| Impairment write-downs | (344) | (80) | (409) | (245) |
| Net realized gains (losses) from sale | 202 | 23 | 394 | 38 |
| Total net gains (losses) from equity securities not carried at fair value | $ 514 | $ (12) | $ 812 | $ (144) |