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Investments - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |
Contributions to investments | $ 13,856 | $ 16,448 | $ 5,051
Proceeds from investments | 4,743 | 15,739 | 10,619
Time Deposits |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Contributions to investments | 13,258 | 15,794 | 4,358
Proceeds from investments | $ 4,053 | $ 15,140 | $ 9,943

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