Segment Information Selected Statement of Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenue	$ 2,180	$ 2,052	$ 4,180		$ 4,038
Cost of sales	607	625	1,195		1,194
Other (income)/deductions—net	(104)	2	(157)		9
Income before provision for taxes on income	872	670	1,569	[1]	1,397	[1]
Depreciation and amortization	121	117	241	[1],[2]	231	[1],[2]
Other business activities
Segment Reporting Information [Line Items]
Income before provision for taxes on income	(116)	(111)	(230)		(209)
Depreciation and amortization	7	7	15	[2]	14	[2]
Operating Segments
Segment Reporting Information [Line Items]
Income before provision for taxes on income	1,254	1,189	2,403		2,397
Depreciation and amortization	42	38	82	[2]	69	[2]
Operating Segments | U.S.
Segment Reporting Information [Line Items]
Revenue	1,165	1,091	2,170		2,111
Cost of sales	214	198	417		383
Gross profit	$ 951	$ 893	$ 1,753		$ 1,728
Gross margin, percentage	81.60%	81.90%	80.80%		81.90%
Operating expenses	$ 212	$ 207	$ 400		$ 372
Other (income)/deductions—net	0	(7)	0		(7)
Income before provision for taxes on income	739	693	1,353		1,363
Depreciation and amortization	20	15	39	[2]	28	[2]
Operating Segments | International
Segment Reporting Information [Line Items]
Revenue	995	943	1,973	[3]	1,891	[3]
Cost of sales	315	288	606		553
Gross profit	$ 680	$ 655	$ 1,367		$ 1,338
Gross margin, percentage	68.30%	69.50%	69.30%		70.80%
Operating expenses	$ 166	$ 161	$ 317		$ 306
Other (income)/deductions—net	(1)	(2)	0		(2)
Income before provision for taxes on income	515	496	1,050		1,034
Depreciation and amortization	22	23	43	[2]	41	[2]
Corporate
Segment Reporting Information [Line Items]
Income before provision for taxes on income	(256)	(267)	(464)		(526)
Depreciation and amortization	30	31	62	[2]	66	[2]
Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	0	0	0	[2]	0	[2]
Purchase accounting adjustments	(43)	(40)	(85)		(80)
Purchase accounting adjustments, Depreciation and Amortization	40	40	79	[2]	80	[2]
Acquisition-related costs	(4)	(1)	(5)		(3)
Certain significant items, Earnings	90	(4)	68	[4]	(4)	[4]
Certain significant items, Depreciation and Amortization	0	0	0	[2],[4]	0	[2],[4]
Other unallocated	(53)	(96)	(118)		(178)
Other Unallocated, Depreciation and Amortization	$ 2	$ 1	$ 3	[2]	$ 2	[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 $421 million and $407 million for the six months ended June 30, 2023 and 2022, 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.For the six months ended June 30, 2022, primarily represents inventory charges related to the consolidation of manufacturing sites in China and product transfer costs, partially offset by other items.