Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Benefits and Charges (Details) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 02, 2016 USD ($)	Sep. 27, 2015 USD ($)	Oct. 02, 2016 USD ($) site		Sep. 27, 2015 USD ($)	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of International Sites Exited | site				1
Provision				$ (17)
Exit costs	[1]			3
Provision for losses on inventory				65		$ 59
Accelerated depreciation				5
Consulting fees		$ 4	$ 8	11		28
Gain (loss) recognized related to divestitures	[2]	0	0	27	[3]	0
Consulting fees				14
Total costs associated with the operational efficiency initiative and supply network strategy		11	24	(23)		317
Restructuring Reserve [Roll Forward]
Beginning balance	[4]			222
Provision				(17)
Utilization and other	[5]			(101)
Ending balance	[4]	104		104
Other current liabilities
Restructuring Reserve [Roll Forward]
Accrued expenses		70		70			$ 162
Other Noncurrent Liabilities
Restructuring Reserve [Roll Forward]
Other noncurrent liabilities		34		34			$ 60
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Provision				(20)
Restructuring Reserve [Roll Forward]
Beginning balance	[4]			221
Provision				(20)
Utilization and other	[5]			(99)
Ending balance	[4]	102		102
Exit Costs
Restructuring Cost and Reserve [Line Items]
Provision				3
Restructuring Reserve [Roll Forward]
Beginning balance	[4]			1
Provision				3
Utilization and other	[5]			(2)
Ending balance	[4]	2		2
Operational Efficiency
Restructuring Cost and Reserve [Line Items]
Provision		4	8	(22)		261
Asset impairment charges		0	8	0		33
Exit costs		1	0	4		0
Provision for losses on inventory		1	5	1		5
Accelerated depreciation		0	0	1		0
Gain (loss) recognized related to divestitures	[1]	0	0	(27)		0
Other cost reduction and cost productivity charges		5	13	(14)		33
Restructuring Reserve [Roll Forward]
Provision		4	8	(22)		261
Operational Efficiency | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Provision	[6]	3	0	(26)		228
Restructuring Reserve [Roll Forward]
Provision	[6]	3	0	(26)		228
Supply Network Strategy
Restructuring Cost and Reserve [Line Items]
Provision		0	0	6		10
Asset impairment charges		0	0	0		1
Employee termination costs		0	0	6		9
Accelerated depreciation		2	0	4		0
Other cost reduction and cost productivity charges		2	3	7		13
Consulting fees		0	3	3		13
Restructuring Reserve [Roll Forward]
Provision		0	0	6		10
Zoetis Initiatives
Restructuring Cost and Reserve [Line Items]
Provision		4	8	(16)		271
Exit costs		1
Accelerated depreciation		2
Consulting fees		4
Restructuring Reserve [Roll Forward]
Provision		4	8	(16)		271
Zoetis Initiatives | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Provision		3		(20)
Restructuring Reserve [Roll Forward]
Provision		3		(20)
International [Member]
Restructuring Cost and Reserve [Line Items]
Provision		(1)	2	(16)		117
Restructuring Reserve [Roll Forward]
Provision		$ (1)	$ 2	$ (16)		$ 117

[1] For the nine months ended October 2, 2016, represents the net gain on the sale of certain manufacturing sites and products, partially offset by the loss on the sale of our share of our Taiwan joint venture, as part of our operational efficiency initiative.

[2] For the nine months ended October 2, 2016, represents the net gain on the sale of certain manufacturing sites and products, partially offset by the loss on the sale of our share of a Taiwan joint venture, as part of our operational efficiency initiative.

[3] For the three and nine months ended October 2, 2016, represents an impairment of finite-lived trademarks related to a canine pain management product. For the nine months ended September 27, 2015, represents an impairment of IPR&D assets related to the termination of a canine oncology project.

[4] At October 2, 2016, and December 31, 2015, included in Accrued expenses ($70 million and $162 million, respectively) and Other noncurrent liabilities ($34 million and $60 million, respectively).

[5] Includes adjustments for foreign currency translation.

[6] For the nine months ended October 2, 2016, includes a reduction in employee termination accruals primarily as a result of higher than expected voluntary attrition rates experienced in the first half of 2016.