Segment and Other Revenue Information - Statement of Income Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Investor Related Costs			$ 3
Restructuring charges			(263)
Accelerated depreciation	$ 0	$ 0	0	$ 1
Dedicated Pension Plans, Settlement Charge for Contract Termination				4
Certain legal and other matters, net	0	13	0	11
Gain (Loss) on Disposition of Assets	0	6	0	6
Insurance Recoveries				2
Certain Significant Items [Member]
Segment Reporting Information [Line Items]
Stand-up costs	39	41	62	74
United States (U.S.) [Member]
Segment Reporting Information [Line Items]
Restructuring charges			(30)
Employee Severance [Member]
Segment Reporting Information [Line Items]
Restructuring charges			(237)
Employee Severance [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Restructuring charges		(3)		(5)
Employee Severance [Member] | United States (U.S.) [Member]
Segment Reporting Information [Line Items]
Restructuring charges				2
MEXICO
Segment Reporting Information [Line Items]
Certain legal and other matters, net		13		13
Insurance Recoveries					$ 1
Zoetis Initiatives [Member]
Segment Reporting Information [Line Items]
Restructuring and Other Cost Productivity Charges	278		293
In Process Research and Development [Member]
Segment Reporting Information [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	2		2
Certain Significant Items [Member]
Segment Reporting Information [Line Items]
Gain (Loss) on Disposition of Assets		3		3
Euro Member Countries, Euro
Segment Reporting Information [Line Items]
Revenues denominated in Euros	$ 151	$ 182	$ 286	$ 350