Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives (Details) product in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jul. 02, 2017 USD ($) site category	Jul. 03, 2016 USD ($)	Jul. 02, 2017 USD ($) employees site category	Jul. 03, 2016 USD ($)	Dec. 31, 2016 USD ($)	Apr. 28, 2016	May 05, 2015 product
Restructuring Cost and Reserve [Line Items]
Exit costs		$ 1	$ 1	$ 1	$ 2
Total Restructuring charges/(reversals) and certain acquisition-related costs		$ 0	(21)	(1)	(19)
Restructuring charges (reversals)	[1]			$ (3)
Number of major product categories		5		5				5
Number sites planning to sell or exit | site				10
Number of sites divested or exited | site		3		3
Number of international manufacturing sites sold | site		3		3
Number of positions eliminated | employees				2,200
Consulting fees		$ 1	4	$ 1	7
Total charges associated with the operational efficiency initiative and supply network strategy		2	(9)	4	(34)
Restructuring Reserve [Roll Forward]
Restructuring accrual balance	[1]			90
Provision	[1]			(3)
Utilization and other	[1],[2]			(37)
Restructuring accrual balance	[1]	50		50
Other current liabilities
Restructuring Reserve [Roll Forward]
Accrued expenses		29		29		$ 61
Other Noncurrent Liabilities
Restructuring Reserve [Roll Forward]
Other noncurrent liabilities		21		21		$ 29
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination costs	[3]	(3)	(24)	(4)	(23)
Restructuring charges (reversals)				(4)
Restructuring Reserve [Roll Forward]
Restructuring accrual balance	[1]			90
Provision				(4)
Utilization and other	[2]			(36)
Restructuring accrual balance	[1]	50		50
Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)				1
Restructuring Reserve [Roll Forward]
Restructuring accrual balance	[1]			0
Provision				1
Utilization and other	[2]			(1)
Restructuring accrual balance	[1]	0		0
Operational Efficiency
Restructuring Cost and Reserve [Line Items]
Exit costs		1	2	1	3
Restructuring charges (reversals)		3	(28)	2	(26)
Accelerated depreciation		0	1	0	1
Net loss/(gain) on sale of assets	[4]	2	6	2	(27)
Other cost reduction and cost productivity charges		3	11	3	(19)
Restructuring Reserve [Roll Forward]
Provision		3	(28)	2	(26)
Operational Efficiency | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination costs	[5]	(2)	30	(1)	29
Supply Network Strategy
Restructuring Cost and Reserve [Line Items]
Employee termination costs		5	(6)	5	(6)
Restructuring charges (reversals)		(5)	6	(5)	6
Accelerated depreciation		1	1	2	2
Other cost reduction and cost productivity charges		1	2	4	5
Consulting fees		0	1	2	3
Restructuring Reserve [Roll Forward]
Provision		(5)	6	(5)	6
Zoetis Initiatives
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)		(2)	(22)	(3)	(20)
Restructuring Reserve [Roll Forward]
Provision		(2)	(22)	$ (3)	(20)
Minimum
Restructuring Cost and Reserve [Line Items]
Number of positions terminated | employees				2,000
Restructuring, new range of expected number of positions eliminated | employees				2,300
Maximum
Restructuring Cost and Reserve [Line Items]
Number of positions terminated | employees				2,500
Restructuring, new range of expected number of positions eliminated | employees				2,800
Taiwan Joint Venture
Restructuring Cost and Reserve [Line Items]
Ownership percentage share in Taiwan join venture							55.00%
UNITED STATES
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)		(1)	(1)		(2)
Restructuring Reserve [Roll Forward]
Provision		(1)	(1)		(2)
International
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)		1	(14)	$ (1)	(15)
Restructuring Reserve [Roll Forward]
Provision		1	(14)	(1)	(15)
Manufacturing, Research, Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges (reversals)		(2)	(8)	(2)	(4)
Restructuring Reserve [Roll Forward]
Provision		(2)	(8)	(2)	(4)
Direct Cost
Restructuring Cost and Reserve [Line Items]
Integration costs	[6]	$ 2	$ 2	$ 2	$ 2
Guarulhos, Brazil [Member]
Restructuring Cost and Reserve [Line Items]
Number of positions terminated | employees				300

[1] At July 2, 2017, and December 31, 2016, included in Accrued expenses ($29 million and $61 million, respectively) and Other noncurrent liabilities ($21 million and $29 million, respectively).

[2] Includes adjustments for foreign currency translation.

[3] The restructuring charges/(reversals) for the three months ended July 2, 2017, are associated with the following: U.S. ($1 million reversal), International ($1 million) and Manufacturing/research/corporate ($2 million reversal). The restructuring charges/(reversals) for the six months ended July 2, 2017, are associated with the following: International ($1 million reversal) and Manufacturing/research/corporate ($2 million reversal). The restructuring charges/(reversals) for the three months ended July 3, 2016, are associated with the following: U.S. ($1 million reversal), International ($14 million reversal) and Manufacturing/research/corporate ($8 million reversal). The restructuring charges/(reversals) for the six months ended July 3, 2016, are associated with the following: U.S. ($2 million reversal), International ($15 million reversal) and Manufacturing/research/corporate ($4 million reversal).

[4] For the three months ended July 3, 2016, primarily represents the net loss on the sale of our share of our Taiwan joint venture as part of our operational efficiency initiative. For the six months ended July 3, 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.

[5] For the three and six months ended July 3, 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.

[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.