v3.26.1
Investments - BeOne Medicines Ltd (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]          
Equity securities $ 5,867,000,000   $ 5,867,000,000   $ 6,144,000,000
Net unrealized gains (losses) 0 $ 0 0 $ (335,000,000)  
BeOne Medicines Ltd          
Debt Securities, Available-for-sale [Line Items]          
Net unrealized gains (losses) (227,000,000) $ (570,000,000) (357,000,000) $ 1,100,000,000  
Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent          
Debt Securities, Available-for-sale [Line Items]          
Equity securities $ 470,000,000   $ 470,000,000   $ 389,000,000
BeOne Medicines Ltd          
Debt Securities, Available-for-sale [Line Items]          
Ownership percentage 17.00%   17.00%   17.00%
BeOne Medicines Ltd | Maximum          
Debt Securities, Available-for-sale [Line Items]          
Ownership percentage 5.00% 5.00% 5.00% 5.00%  
BeOne Medicines Ltd | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | BeOne Medicines Ltd          
Debt Securities, Available-for-sale [Line Items]          
Equity securities $ 5,400,000,000   $ 5,400,000,000   $ 5,800,000,000