Financial Instruments - Long-Term Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Zoetis [Member]	Mar. 31, 2013 Zoetis [Member] Senior Notes [Member]		Jan. 28, 2013 Zoetis [Member] Senior Notes [Member]	Mar. 31, 2013 Three Point Two Five Percent Senior Notes, Due 2023 [Member] Zoetis [Member] Senior Notes [Member]	Mar. 31, 2013 Four Point Seven Percent Senior Notes, Due 2043 [Member] Zoetis [Member] Senior Notes [Member]	Mar. 31, 2013 One Point Eight Seven Five Percent Senior Notes, Due 2018 [Member] Zoetis [Member] Senior Notes [Member]	Mar. 31, 2013 One Point One Five Percent Senior Notes, Due 2016 [Member] Zoetis [Member] Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage						3.25%	4.70%	1.875%	1.15%
Long-term Debt, Gross			$ 3,650,000,000		$ 3,650,000,000
Debt instrument, unamortized discount					10,000,000
Reclassification of Debt from Non-Current to Current	2,500,000,000
Long-term Debt			$ 3,640,000,000	[1],[2]		$ 1,349,000,000	$ 1,142,000,000	$ 749,000,000	$ 400,000,000
Debt Instrument Callable Principal Amount Percentage		101.00%

[1] The indenture that governs the Zoetis senior notes contains covenants, including limitations on the ability of Zoetis and certain Zoetis subsidiaries to incur liens or engage in sale-leaseback transactions. The indenture also contains restrictions on Zoetis' ability to consolidate, merge or sell substantially all of its assets. In addition, the indenture contains other customary terms, including certain events of default, upon the occurrence of which, the Zoetis senior notes may be declared immediately due and payable. Zoetis is able to redeem the Zoetis senior notes, in whole or in part, at any time by paying a “make whole” premium, plus accrued and unpaid interest. Except under limited circumstances, Zoetis will not be permitted to redeem the 2023 notes pursuant to this optional redemption provision. Upon the occurrence of a change of control of Zoetis and a downgrade of the senior notes below an investment grade rating by each of Moody's Investors Service, Inc. and Standard & Poor's Ratings Services, Zoetis is, in certain circumstances, required to make an offer to purchase each of the Zoetis senior notes at a price equal to 101% of the aggregate principal amount of the Zoetis senior notes together with accrued and unpaid interest.

[2] For additional information, see Note 2B. Acquisitions, Divestitures, Collaborative Arrangement and Equity-Method Investment: Divestitures.