Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions		9 Months Ended
		Oct. 02, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning Balance		$ 1,455
Additions / Adjustments	[1]	16
Other	[2]	26
Ending Balance		1,497
Reduction in acquisition date fair value		13
Gross goodwill		2,033	$ 1,991
United States (U.S.)
Goodwill [Roll Forward]
Beginning Balance		665
Additions / Adjustments	[1]	(4)
Other	[2]	0
Ending Balance		661
International
Goodwill [Roll Forward]
Beginning Balance		790
Additions / Adjustments	[1]	20
Other	[2]	26
Ending Balance		836
Denmark
Goodwill [Roll Forward]
Amount of purchase price allocation		16
South America
Goodwill [Roll Forward]
Amount of purchase price allocation		$ 12

[1] Primarily includes a $16 million purchase price allocation associated with the acquisition of a veterinary diagnostics business in Denmark and a $12 million purchase price allocation associated with the acquisition of a livestock business in South America, offset by a $13 million reduction in the acquisition date fair value of goodwill associated with the acquisition of certain assets of Abbott Animal Health. See Note 4A. Acquisitions and Divestitures: Acquisitions.

[2] Includes adjustments for foreign currency translation.