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Investments - Narrative: Available-for-sale Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Cash	$ 496	$ 4,970
Cash and Cash Equivalents, at Carrying Value	31,560	$ 7,629
Horizon Therapeutics
Debt Securities, Available-for-sale [Line Items]
Cash payment	$ 27,800

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