Segment Information - Income Statement (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues		$ 8,544	$ 8,080	$ 7,776
Cost of Sales	[1]	2,561	2,454	2,303
Other (income)/deductions-net		(159)	40	48
Earnings	[2]	2,936	2,656	2,488
Depreciation and Amortization	[2],[3]	491	465	448
Property, plant and equipment, less accumulated depreciation		3,204	2,753
Other business activities
Segment Reporting Information [Line Items]
Earnings		(496)	(424)	(406)
Depreciation and Amortization	[3]	33	28	28
United States
Segment Reporting Information [Line Items]
Revenues		4,555	4,313	4,042
Property, plant and equipment, less accumulated depreciation		2,092	1,820
International
Segment Reporting Information [Line Items]
Property, plant and equipment, less accumulated depreciation		1,112	933
Operating Segments
Segment Reporting Information [Line Items]
Earnings		4,900	4,753	4,517
Depreciation and Amortization	[3]	172	141	128
Operating Segments | United States Segment
Segment Reporting Information [Line Items]
Revenues		4,555	4,313	4,042
Cost of Sales		900	803	788
Gross Profit		$ 3,655	$ 3,510	$ 3,254
Gross Margin		80.20%	81.40%	80.50%
Operating Expenses		$ 786	$ 765	$ 681
Other (income)/deductions-net		6	18	(4)
Earnings		2,863	2,763	2,569
Depreciation and Amortization	[3]	80	55	54
Operating Segments | International Segment
Segment Reporting Information [Line Items]
Revenues	[4]	3,911	3,681	3,652
Cost of Sales		1,234	1,083	1,106
Gross Profit		$ 2,677	$ 2,598	$ 2,546
Gross Margin		68.40%	70.60%	69.70%
Operating Expenses		$ 638	$ 611	$ 602
Other (income)/deductions-net		(2)	3	4
Earnings		2,037	1,990	1,948
Operating Segments | International
Segment Reporting Information [Line Items]
Depreciation and Amortization	[3]	92	86	74
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Earnings		(1,042)	(1,073)	(1,052)
Depreciation and Amortization	[3]	128	132	115
Segment Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and Amortization	[3]	0	0	0
Purchase accounting adjustments, earnings		(159)	(160)	(175)
Purchase accounting adjustments, depreciation and amortization	[3]	153	159	175
Acquisition-related costs, earnings		(9)	(5)	(12)
Certain significant items, earnings	[5]	33	(56)	(73)
Certain significant items, depreciation and amortization	[3],[5]	0	0	0
Other unallocated, earnings		(291)	(379)	(311)
Other unallocated, deprecation and amortization	[3]	$ 5	$ 5	$ 2

[1] Exclusive of amortization of intangible assets, except as disclosed in Note 3. Significant Accounting Policies—Amortization of Intangible Assets, Depreciation and Certain Long-Lived Assets.

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

[3] 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.

[4] Revenue denominated in euros was $853 million in 2023, $774 million in 2022 and $814 million in 2021.

[5] For 2023, certain significant items primarily consisted of a gain on the sale of a majority interest in our pet insurance business of $101 million, partially offset by employee termination and exit costs related to organizational structure refinements of $43 million and certain asset impairment charges primarily related to our precision animal health and diagnostics businesses of $24 million. For 2022, certain significant items primarily represents inventory and asset impairment charges related to customer relationships, developed technology rights and property, plant and equipment in our diagnostics, poultry, cattle and swine businesses and the consolidation of manufacturing sites in China of $47 million, as well as employee termination and exit costs associated with cost-reduction and productivity initiatives in certain international markets of $4 million. For 2021, certain significant items primarily included certain asset impairment charges of $46 million, as well as employee termination costs associated with our international operations and other costs associated with cost-reduction and productivity initiatives of $24 million.