Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 1,028	$ 1,131	$ 3,430	$ 3,652
Pet Health
Disaggregation of Revenue [Line Items]
Revenue	471	527	1,722	1,857
Farm Animal
Disaggregation of Revenue [Line Items]
Revenue	545	583	1,667	1,728
Cattle
Disaggregation of Revenue [Line Items]
Revenue	227	250	722	735
Poultry
Disaggregation of Revenue [Line Items]
Revenue	176	179	529	536
Swine
Disaggregation of Revenue [Line Items]
Revenue	95	110	284	346
Aqua
Disaggregation of Revenue [Line Items]
Revenue	47	44	132	111
Contract Manufacturing
Disaggregation of Revenue [Line Items]
Revenue	$ 12	$ 21	$ 41	$ 67