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Loans Payable and Long-Term Debt (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2026	Apr. 30, 2026
Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 6,000
Terns Pharmaceuticals, Inc.
Short-Term Debt [Line Items]
Consideration transferred, asset acquisition	6,800
Delayed Draw Term Loan (DDTL) \| Line of Credit
Short-Term Debt [Line Items]
Debt instrument, term		364 days
Line of credit facility, maximum borrowing capacity		$ 6,000
Floating Rate Notes Due 2028 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	500
4.30% notes due 2028 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 1,000
Stated interest rate	4.30%
4.65% notes due 2031 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 500
Stated interest rate	4.65%
4.95% notes due 2033 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 1,000
Stated interest rate	4.95%
5.20% notes due 2036 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 1,500
Stated interest rate	5.20%
5.75% notes due 2046 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 500
Stated interest rate	5.75%
5.85% notes due 2056 \| Senior Notes
Short-Term Debt [Line Items]
Face amount of debt	$ 1,000
Stated interest rate	5.85%