Revenue - Revenue by Species (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from External Customer [Line Items]
Revenues	$ 8,544	$ 8,080	$ 7,776
Cattle
Revenue from External Customer [Line Items]
Revenues	1,503	1,440	1,557
Swine
Revenue from External Customer [Line Items]
Revenues	543	565	659
Poultry
Revenue from External Customer [Line Items]
Revenues	524	476	507
Fish
Revenue from External Customer [Line Items]
Revenues	220	212	187
Other
Revenue from External Customer [Line Items]
Revenues	100	98	95
Livestock
Revenue from External Customer [Line Items]
Revenues	2,890	2,791	3,005
Dogs and Cats
Revenue from External Customer [Line Items]
Revenues	285	264	263
Horses
Revenue from External Customer [Line Items]
Revenues	5,291	4,939	4,426
Companion Animal
Revenue from External Customer [Line Items]
Revenues	5,576	5,203	4,689
Contract Manufacturing and Human Health Diagnostics [Member]
Revenue from External Customer [Line Items]
Revenues	$ 78	$ 86	$ 82