Financial Instruments - Long-Term Debt (Details) (USD $)	9 Months Ended																		9 Months Ended
	Sep. 29, 2013	Sep. 29, 2013 Senior Notes [Member]		Jun. 03, 2013 Senior Notes [Member]		Dec. 31, 2012 Senior Notes [Member]		Jan. 28, 2013 Zoetis [Member] Senior Notes [Member]	Sep. 29, 2013 One Point Five Percent Senior Notes, Due 2018 [Member] Senior Notes [Member]		Sep. 29, 2013 Three Point Two Five Percent Senior Notes, Due 2023 [Member] Senior Notes [Member]		Sep. 29, 2013 Point Nine Percent Senior Notes, Due 2017 [Member] Senior Notes [Member]		Sep. 29, 2013 Four Point Three Percent Senior Notes, Due 2043 [Member] Senior Notes [Member]		Sep. 29, 2013 Floating Rate Note, Due 2018 [Member] Senior Notes [Member]	Sep. 29, 2013 Floating Rate Note, Due 2018 [Member] Senior Notes [Member] London Interbank Offered Rate (LIBOR) [Member]	Sep. 29, 2013 one point five percent senior notes due June 2018 and point nine percent senior notes due January 2017 [Member]	Sep. 29, 2013 three percent senior notes due June 2023 and four point three percent notes due June 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 4,000,000,000	[1],[2]	$ 4,000,000,000	[1],[2]				$ 1,000,000,000	[2]	$ 1,000,000,000	[1]	$ 750,000,000	[2]	$ 750,000,000	[1]	$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage				3.625%
Debt Instrument Callable Principal Amount Percentage	100.00%
Debt Instrument Callable US Treasury Rate Margin Percentage																			0.10%	0.15%
Debt Instrument, Interest Rate, Effective Percentage									1.50%		3.00%		0.90%		4.30%
Long-term Debt, Gross								3,650,000,000
Long-term Debt						$ 2,400,000,000	[1],[2]
Derivative, Basis Spread on Variable Rate																		0.30%

[1] Instrument is callable by us at any time at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate, plus 0.15% plus, in each case, accrued and unpaid interest.

[2] Instrument is callable by us at any time at the greater of 100% of the principal amount or the sum of the present values of the remaining scheduled payments of principal and interest discounted at the U.S. Treasury rate, plus 0.10% plus, in each case, accrued and unpaid interest.