Investments - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Contributions to investments	$ 16,448	$ 5,051	$ 35,713
Proceeds from investments	15,739	10,619	45,489
Time Deposits
Schedule of Equity Method Investments [Line Items]
Contributions to investments	15,794	4,358	34,905
Proceeds from investments	$ 15,140	$ 9,943	$ 44,372

The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

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The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

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