Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Realized and unrealized gains (losses) on financial instruments | ||
| Realized and unrealized gains (losses) on financial instruments, net | $ (15) | $ (7) |
| Change in fair value of exchangeable senior debentures realized gain (loss) | 53 | (129) |
| Cumulative amount of gain in change in fair value | 566 | |
| Equity securities | ||
| Realized and unrealized gains (losses) on financial instruments | ||
| Realized and unrealized gains (losses) on financial instruments, net | (2) | |
| Exchangeable senior debentures | ||
| Realized and unrealized gains (losses) on financial instruments | ||
| Realized and unrealized gains (losses) on financial instruments, net | $ (15) | $ (5) |