Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	3 Months Ended
	Apr. 02, 2017 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 1,481
Additions	10	[1]
Other	6	[2]
Ending Balance	1,497
United States (U.S.)
Goodwill [Roll Forward]
Beginning Balance	661
Additions	5	[1]
Other	0	[2]
Ending Balance	666
International
Goodwill [Roll Forward]
Beginning Balance	820
Additions	5	[1]
Other	6	[2]
Ending Balance	$ 831

[1] Represents the consolidation of a European livestock monitoring company, a variable interest entity of which Zoetis is the primary beneficiary.

[2] Includes adjustments for foreign currency translation.