Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
Dec. 31, 2023 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Carrying value of equity securities without readily determinable fair values | $ 900 | $ 900 | |
| Net upward adjustments of equity securities without readily determinable fair values | 0 | $ 0 | |
| Net downward adjustments of equity securities without readily determinable fair values | 0 | $ 95 | |
| Cumulative net unrealized gains for equity investments without readily determinable fair values | 1,100 | 1,100 | |
| Cumulative net unrealized losses for equity investments without readily determinable fair values | $ 431 | 431 | |
| Level 3 | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Carrying value of equity securities without readily determinable fair values | $ 0 | ||