Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Business Acquisition, Transaction Costs	[1]	$ 0	$ 21	$ 0	$ 21
Exit costs	[2],[3]	0	0	0	1
Total Restructuring charges and certain acquisition-related costs		6	47	33	54
Restructuring charges (reversals)				20
Restructuring Reserve [Roll Forward]
Restructuring accrual balance	[4]			45
Provision				20
Utilization and other	[5]			(28)
Restructuring accrual balance	[4]	37		37
Other current liabilities
Restructuring Reserve [Roll Forward]
Accrued expenses		11		11		$ 27
Other Noncurrent Liabilities
Restructuring Reserve [Roll Forward]
Other noncurrent liabilities		26		26		$ 18
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination costs	[2],[3]	2	17	20	22
Restructuring charges (reversals)		8		11
Restructuring Reserve [Roll Forward]
Provision		8		11
International
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)			8		12
Restructuring Reserve [Roll Forward]
Provision			8		12
Manufacturing, Research, Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)		2	9	20	11
Restructuring Reserve [Roll Forward]
Provision		2	9	20	11
Direct Cost
Restructuring Cost and Reserve [Line Items]
Integration costs	[6]	4	9	13	$ 10
Reconciling Items
Restructuring Cost and Reserve [Line Items]
Employee termination costs			$ (8)
Zoetis Initiatives | Reconciling Items
Restructuring Cost and Reserve [Line Items]
Restructuring and Other Cost Productivity Charges		7
Abaxis Inc
Restructuring Cost and Reserve [Line Items]
Total Restructuring charges and certain acquisition-related costs		$ 5		32
Abaxis Inc | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)				10
Restructuring Reserve [Roll Forward]
Provision				$ 10

[1] Transaction costs represent external costs directly related to acquiring businesses and primarily include expenditures for banking, legal, accounting and other similar services.

[2] The restructuring charges are associated with the following: • For the three months ended September 30, 2019, Manufacturing/research/corporate of $2 million. • For the three months ended September 30, 2018, International of $8 million and Manufacturing/research/corporate of $9 million. • For the nine months ended September 30, 2019, Manufacturing/research/corporate of $20 million. • For the nine months ended September 30, 2018, International of $12 million and Manufacturing/research/corporate of $11 million.

[3] The restructuring charges for the three and nine months ended September 30, 2019 primarily relate to the acquisition of Abaxis. The restructuring charges for the three and nine months ended September 30, 2018 primarily relate to employee termination costs of $8 million and $11 million, respectively, in Europe as a result of initiatives to better align our organizational structure, and employee termination costs of $10 million related to the acquisition of Abaxis.

[4] At September 30, 2019, and December 31, 2018, included in Accrued expenses ($11 million and $27 million, respectively) and Other noncurrent liabilities ($26 million and $18 million, respectively).

[5] Includes adjustments for foreign currency translation.

[6] Integration costs represent external, incremental costs directly related to integrating acquired businesses and primarily include expenditures for consulting and the integration of systems and processes, as well as product transfer costs.