Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
Dec. 31, 2021 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Carrying value of equity securities without readily determinable fair values | $ 1,200 | $ 1,200 | $ 1,300 | ||
| Net upward adjustments of equity securities without readily determinable fair values | 6 | $ 103 | 94 | $ 730 | |
| Net downward adjustments of equity securities without readily determinable fair values | 51 | $ 0 | 153 | $ 2 | |
| Cumulative net unrealized gains for equity investments without readily determinable fair values | 1,200 | 1,200 | 1,100 | ||
| Cumulative net unrealized losses for equity investments without readily determinable fair values | $ 159 | $ 159 | $ 10 | ||