Investments - Equity Investments (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Dec. 31, 2024 |
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|---|---|---|---|---|
| Debt and Equity Securities, FV-NI [Line Items] | ||||
| Equity investments | [1] | $ 759 | $ 803 | |
| Equity investments | Privately held | ||||
| Debt and Equity Securities, FV-NI [Line Items] | ||||
| Equity investments | 455 | 460 | ||
| Equity investments | Publicly traded | ||||
| Debt and Equity Securities, FV-NI [Line Items] | ||||
| Equity investments | 153 | 176 | ||
| Exchange-traded funds | ||||
| Debt and Equity Securities, FV-NI [Line Items] | ||||
| Equity investments | 135 | 151 | ||
| Warrants and other | ||||
| Debt and Equity Securities, FV-NI [Line Items] | ||||
| Equity investments | $ 16 | $ 16 | ||
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