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Investments - Other Equity Securities (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Equity securities | $ 3,985 |  | $ 4,514
Unrealized gain (loss) on equity securities | 50 | $ 5 |
Other Noncurrent Assets |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Equity securities | 536 |  | 494
Equity securities without readily determinable fair value | $ 333 |  | $ 309

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