Segment Information Selected Statement of Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024		Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 2,361	$ 2,180	$ 4,551		$ 4,180
Cost of sales	668	607	1,311		1,195
Other (income)/deductions—net	25	(104)	17		(157)
Income before provision for taxes on income	780	872	1,527	[1]	1,569	[1]
Depreciation and amortization	127	121	253	[1],[2]	241	[1],[2]
Other business activities
Segment Reporting Information [Line Items]
Income before provision for taxes on income	(142)	(116)	(274)		(230)
Depreciation and amortization	11	7	20	[2]	15	[2]
Operating Segments
Segment Reporting Information [Line Items]
Income before provision for taxes on income	1,390	1,254	2,681		2,403
Depreciation and amortization	46	42	93	[2]	82	[2]
Operating Segments | U.S.
Segment Reporting Information [Line Items]
Revenue	1,308	1,165	2,471		2,170
Cost of sales	232	214	449		417
Gross profit	$ 1,076	$ 951	$ 2,022		$ 1,753
Gross margin, percentage	82.30%	81.60%	81.80%		80.80%
Operating expenses	$ 204	$ 212	$ 394		$ 400
Other (income)/deductions—net	0	0	0		0
Income before provision for taxes on income	872	739	1,628		1,353
Depreciation and amortization	21	20	45	[2]	39	[2]
Operating Segments | International
Segment Reporting Information [Line Items]
Revenue	1,035	995	2,042	[3]	1,973	[3]
Cost of sales	342	315	655		606
Gross profit	$ 693	$ 680	$ 1,387		$ 1,367
Gross margin, percentage	67.00%	68.30%	67.90%		69.30%
Operating expenses	$ 175	$ 166	$ 334		$ 317
Other (income)/deductions—net	0	(1)	0		0
Income before provision for taxes on income	518	515	1,053		1,050
Depreciation and amortization	25	22	48	[2]	43	[2]
Corporate
Segment Reporting Information [Line Items]
Income before provision for taxes on income	(299)	(256)	(587)		(464)
Depreciation and amortization	33	30	65	[2]	62	[2]
Reconciling Items
Segment Reporting Information [Line Items]
Purchase accounting adjustments	(35)	(43)	(72)		(85)
Purchase accounting adjustments, Depreciation and Amortization	35	40	72	[2]	79	[2]
Acquisition And Divestiture Depreciation, Depletion and Amortization	0	0	0	[2]	0	[2]
Business Combination, Acquisition And Divesture Related Costs	(5)	(4)	(5)		(5)
Certain significant items, Earnings	(70)	90	(76)	[4]	68	[4]
Certain significant items, Depreciation and Amortization	0	0	0	[2],[4]	0	[2],[4]
Other unallocated	(59)	(53)	(140)		(118)
Other Unallocated, Depreciation and Amortization	$ 2	$ 2	$ 3	[2]	$ 3	[2]

[1] Defined as income before provision for taxes on income.

[2] Certain production facilities are shared. Depreciation and amortization is allocated to the reportable operating segments based on estimates of where the benefits of the related assets are realized.

[3] Revenue denominated in euros was $460 million and $421 million for the six months ended June 30, 2024 and 2023, respectively.

[4] For the six months ended June 30, 2023, primarily consisted of a gain on the sale of a majority interest in our pet insurance business, partially offset by employee termination costs related to organizational structure refinements and certain asset impairment charges related to our precision animal health business.