CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021		Sep. 30, 2020
Income Statement [Abstract]
Revenue	$ 1,990	$ 1,786	$ 5,809		$ 4,868
Costs and expenses:
Cost of sales	586	546	1,703		1,456
Selling, general and administrative expenses	504	424	1,408		1,206
Research and development expenses	132	112	370		330
Amortization of intangible assets	40	40	121		120
Restructuring charges and certain acquisition-related costs	9	5	39		22
Interest expense, net of capitalized interest	56	62	170		173
Other (income)/deductions—net	4	0	16		(15)
Income before provision for taxes on income	659	597	1,982	[1]	1,576	[1]
Provision for taxes on income	107	118	361		298
Net income before allocation to noncontrolling interests	552	479	1,621		1,278
Less: Net loss attributable to noncontrolling interests	0	0	(2)		(1)
Net income attributable to Zoetis Inc.	$ 552	$ 479	$ 1,623		$ 1,279
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)	$ 1.16	$ 1.01	$ 3.42		$ 2.69
Diluted (in dollars per share)	$ 1.16	$ 1.00	$ 3.40		$ 2.67
Weighted-average common shares outstanding:
Basic (in shares)	474.0	475.5	474.8		475.5
Diluted (in shares)	476.3	478.5	477.1		478.5
Dividends paid per common share (in dollars per share)	$ 0	$ 0	$ 0.500		$ 0.400

[1] Defined as income before provision for taxes on income.