Share-Based Payments (Stock option activity) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Outstanding, Beginning Balance (in shares)		2,067,606
Granted (in shares)		271,150
Exercised (in shares)		(695,987)
Forfeited (in shares)		(116,267)
Outstanding, Ending Balance (in shares)		1,526,502	2,067,606
Weighted-average Exercise Price Per Share
Outstanding, Beginning Balance (in dollars per share)		$ 95.32
Granted (in dollars per share)		162.12
Exercised (in dollars per share)		59.89
Forfeited (in dollars per share)		150.66
Outstanding, Ending Balance (in dollars per share)		$ 119.13	$ 95.32
Outstanding, Weighted-average Remaining Contractual Term (in years)		5 years 6 months
Outstanding, Aggregate Intrinsic Value	[1]	$ 120
Exercisable, December 31, 2023		858,314
Exercisable, Weighted Average Exercise Price Per Share		$ 77.31
Exercisable, Weighted Average Remaining Contractual Term (in years)		3 years 6 months
Vested and expected to vest, Aggregate Intrinsic Value	[1]	$ 103
Weighted-average grant date fair value per stock option		$ 43.56	$ 51.13	$ 37.81
Aggregate intrinsic value on exercise		$ 81	$ 31	$ 87
Cash received upon exercise		42	15	36
Share-based Payment Arrangement, Exercise of Option, Tax Benefit		$ 17	$ 19	$ 34

[1] Market price of underlying Zoetis common stock less exercise price.