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Investments - Schedule of Fair Values by Classification (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Total interest-bearing securities	$ 8,576	$ 10,404
Available-for-sale investments
Marketable Securities [Line Items]
Cash and cash equivalents	8,576	10,404
Total interest-bearing securities	$ 8,576	$ 10,404

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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