Fair Values (Details Textual) - Fair Value, Nonrecurring - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Carrying value of equity securities without readily determinable fair values | $ 1,200.0 | $ 1,100.0 | |
| Net upward adjustments of equity securities without readily determinable fair values | 22.0 | $ 0.0 | |
| Net downward adjustments of equity securities without readily determinable fair values | 10.0 | $ 39.0 | |
| Cumulative net unrealized gains for equity investments without readily determinable fair values | 1,200.0 | ||
| Cumulative net unrealized losses for equity investments without readily determinable fair values | 500.0 | ||
| 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 | $ 62.0 | $ 500.0 | |