Segment and Other Revenue Information - Statement of Income Narrative (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 03, 2016	Mar. 29, 2015
Segment Reporting Information [Line Items]
Net gain on sale of assets	[1]	$ 33	$ 0
Restructuring charges (benefit)		2
Consulting charges		3	10
Investor Related Costs			3
Certain Significant Items
Segment Reporting Information [Line Items]
Stand-up costs		12	23
Operational Efficiency
Segment Reporting Information [Line Items]
Net gain on sale of assets	[2]	(33)
Restructuring charges (benefit)		2
Other cost reduction and cost productivity charges		(30)	10
Aggregate amount of all charges		237
Supply Network Strategy
Segment Reporting Information [Line Items]
Other cost reduction and cost productivity charges		3	5
Zoetis Initiatives
Segment Reporting Information [Line Items]
Aggregate amount of all charges			15
Euro Member Countries, Euro
Segment Reporting Information [Line Items]
Revenues denominated in Euros		$ 154	$ 135

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

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