Share-based Payments (Stock option valuation assumptions) (Details)	3 Months Ended
	Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected dividend yield(a)	1.00%	[1]
Risk-free interest rate(b)	1.29%	[2]
Expected stock price volatility(c)	28.20%	[3]
Expected term(d) (years)	6 years 6 months	[4]

[1] Determined using a constant dividend yield during the expected term of the Zoetis stock option.

[2] Determined using the interpolated yield on U.S. Treasury zero-coupon issues.

[3] Determined using implied volatility.

[4] Determined using expected exercise and post-vesting termination patterns.