Revenue - Revenue by Species (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue from External Customer [Line Items]
Revenues	$ 9,256	$ 8,544	$ 8,080
Cattle
Revenue from External Customer [Line Items]
Revenues	1,531	1,503	1,440
Swine
Revenue from External Customer [Line Items]
Revenues	516	543	565
Poultry
Revenue from External Customer [Line Items]
Revenues	527	524	476
Fish
Revenue from External Customer [Line Items]
Revenues	242	220	212
Other
Revenue from External Customer [Line Items]
Revenues	82	100	98
Livestock
Revenue from External Customer [Line Items]
Revenues	2,898	2,890	2,791
Dogs and Cats
Revenue from External Customer [Line Items]
Revenues	285	285	264
Horses
Revenue from External Customer [Line Items]
Revenues	5,993	5,291	4,939
Companion Animal
Revenue from External Customer [Line Items]
Revenues	6,278	5,576	5,203
Contract Manufacturing and Human Health Diagnostics [Member]
Revenue from External Customer [Line Items]
Revenues	$ 80	$ 78	$ 86