Financial Instruments - Short-Term Borrowings (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Commercial paper, principal amount	[1]	$ 7,965	$ 0
Current portion of long-term debt, principal amount		2,250	2,550
Other short-term borrowings, principal amount	[2]	252	385
Total short-term borrowings, principal amount		10,467	2,935
Net fair value adjustments related to hedging and purchase accounting		5	11
Net unamortized discounts, premiums and debt issuance costs		(121)	(1)
Total Short-term borrowings, including current portion of long-term debt, carried at historical proceeds, as adjusted		10,350	$ 2,945
Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity		15,000
Line of Credit [Member]
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity		305
Line of credit facility, due to expire within one year		274
Credit Facility, Maturing October 2024 [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity		8,000
Credit Facility, Maturing October 2028 [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity		$ 7,000

[1] Issued in the fourth quarter of 2023 as part of the financing for our acquisition of Seagen (see Note 2A). The weighted-average effective interest rate on commercial paper outstanding was approximately 5.37% as of December 31, 2023.

[2] Primarily includes cash collateral. See Note 7F.