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Investments - Narrative: Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 3	$ (106)	$ 8	$ (276)
Equity securities	4,091		4,091		$ 815
Adjustments for equity method investments			(3)	497
BeiGene
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	(705)		1,200
Carrying value of equity method investment					2,200
Adjustments for equity method investments		80		188
Amortization of the basis difference		$ 48		$ 95
Other Noncurrent Assets
Debt Securities, Available-for-sale [Line Items]
Equity securities	397		397		480
Equity securities without readily determinable fair value	291		291		$ 233
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	$ 3,400		$ 3,400

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