Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Benefits and Charges (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 02, 2017	Apr. 03, 2016	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Provision	[1]	$ (1)
Consulting fees		0	$ 3
Gain (loss) recognized related to divestitures	[2]	0	33
Consulting fees			5
Total costs/(reversals) associated with the operational efficiency initiative and supply network strategy		2	(25)
Restructuring Reserve [Roll Forward]
Beginning balance	[1],[3]	90
Provision	[1]	(1)
Utilization and other	[1],[4]	(22)
Ending balance	[1],[3]	67
Other current liabilities
Restructuring Reserve [Roll Forward]
Accrued expenses		39		$ 61
Other Noncurrent Liabilities
Restructuring Reserve [Roll Forward]
Other noncurrent liabilities		28		$ 29
Operational Efficiency
Restructuring Cost and Reserve [Line Items]
Exit costs	[5]	0	1
Gain (loss) recognized related to divestitures	[6]	0	(33)
Other cost reduction and cost productivity charges		0	(30)
Operational Efficiency | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Provision	[5]	(1)	1
Restructuring Reserve [Roll Forward]
Provision	[5]	(1)	1
Zoetis Initiatives
Restructuring Cost and Reserve [Line Items]
Provision	[5]	(1)	2
Exit costs		1	1
Accelerated depreciation		1	1
Consulting fees		2
Restructuring Reserve [Roll Forward]
Provision	[5]	(1)	2
Zoetis Initiatives | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Provision		(1)	1
Restructuring Reserve [Roll Forward]
Provision		(1)	1
Supply Network Strategy
Restructuring Cost and Reserve [Line Items]
Other cost reduction and cost productivity charges		3	3
Accelerated depreciation		1	1
Consulting fees		2	2
United States (U.S.)
Restructuring Cost and Reserve [Line Items]
Provision		1	(1)
Restructuring Reserve [Roll Forward]
Provision		1	(1)
International
Restructuring Cost and Reserve [Line Items]
Provision		(2)	(1)
Restructuring Reserve [Roll Forward]
Provision		$ (2)	(1)
Manufacturing, Research, Corporate
Restructuring Cost and Reserve [Line Items]
Provision			4
Restructuring Reserve [Roll Forward]
Provision			$ 4

[1] Changes in our restructuring accruals represent employee termination costs.

[2] For the three months ended April 3, 2016, represents the net gain on the sale of certain manufacturing sites and products as part of our operational efficiency initiative.

[3] At April 2, 2017, and December 31, 2016, included in Accrued expenses ($39 million and $61 million, respectively) and Other noncurrent liabilities ($28 million and $29 million, respectively).

[4] Includes adjustments for foreign currency translation.

[5] The restructuring charges/(reversals) for the three months ended April 2, 2017, are associated with the following: U.S. ($1 million) and International ($2 million reversal). The restructuring charges for the three months ended April 3, 2016, are associated with the following: U.S. ($1 million reversal), International ($1 million reversal) and Manufacturing/research/corporate ($4 million).

[6] For the three months ended April 3, 2016, represents the net gain on the sale of certain manufacturing sites and products.