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Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |
Investments | $ 95 |  | $ 93
Equity method investment | 3 | $ 0 |
Royalty fee |  |  |
Debt Instrument [Line Items] |  |  |
Revenue | $ 42 | $ 44 |

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