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Investments - BeOne Medicines Ltd (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 6,819		$ 6,819		$ 4,188
BeOne Medicines Ltd
Debt Securities, Available-for-sale [Line Items]
Net unrealized gains	1,900	$ 1,600	3,000	$ 836
Other Noncurrent Assets
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 300		$ 300		314
BeOne Medicines Ltd | Maximum
Debt Securities, Available-for-sale [Line Items]
Ownership percentage	5.00%	5.00%	5.00%	5.00%
BeOne Medicines Ltd | Other Noncurrent Assets | BeOne Medicines Ltd
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 6,500		$ 6,500		$ 3,500

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