Share-Based Payments (Stock option activity) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Shares
Outstanding, Beginning Balance (in shares)		2,132,567
Granted (in shares)		235,900
Exercised (in shares)		(263,174)
Forfeited (in shares)		(37,687)
Outstanding, Ending Balance (in shares)		2,067,606	2,132,567
Weighted-average Exercise Price Per Share
Outstanding, Beginning Balance (in dollars per share)		$ 80.19
Granted (in dollars per share)		201.23
Exercised (in dollars per share)		57.10
Forfeited (in dollars per share)		168.69
Outstanding, Ending Balance (in dollars per share)		$ 95.32	$ 80.19
Outstanding, Weighted-average Remaining Contractual Term (in years)		5 years
Outstanding, Aggregate Intrinsic Value	[1]	$ 122
Exercisable, December 31, 2022		1,317,387
Exercisable, Weighted Average Exercise Price Per Share		$ 54.48
Exercisable, Weighted Average Remaining Contractual Term (in years)		3 years 3 months 18 days
Vested and expected to vest, Aggregate Intrinsic Value	[1]	$ 121
Weighted-average grant date fair value per stock option		$ 51.13	$ 37.81	$ 34.22
Aggregate intrinsic value on exercise		$ 31	$ 87	$ 114
Cash received upon exercise		15	36	57
Share-based Payment Arrangement, Exercise of Option, Tax Benefit		$ 19	$ 34	$ 39

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