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Investments - Narrative: Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ (49)	$ 17	$ (41)	$ (259)
Equity Securities, FV-NI, Noncurrent	4,250		4,250		$ 815
Adjustments for equity method investments			(17)	713
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount		55		64
BeiGene
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	30		1,200
Carrying value of equity method investment					2,200
Adjustments for equity method investments		104		292
Amortization of the basis difference		$ 48		$ 143
Other Noncurrent Assets
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Noncurrent	344		344		480
Equity securities without readily determinable fair value	293		293		233
Other Noncurrent Assets | BeiGene
Debt Securities, Available-for-sale [Line Items]
Carrying value of equity method investment					$ 2,200
BeiGene
Debt Securities, Available-for-sale [Line Items]
Ownership percentage					18.20%
BeiGene | Other Noncurrent Assets
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Noncurrent	$ 3,400		$ 3,400

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