CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 1,786	$ 1,584	$ 4,868		$ 4,586
Costs and expenses:
Cost of sales	546	479	1,456		1,462
Selling, general and administrative expenses	424	391	1,206		1,166
Research and development expenses	112	112	330		325
Amortization of intangible assets	40	38	120		115
Restructuring charges and certain acquisition-related costs	5	6	22		33
Interest expense, net of capitalized interest	62	56	173		167
Other (income)/deductions—net	0	(26)	(15)		(46)
Income before provision for taxes on income	597	528	1,576	[1]	1,364	[1]
Provision for taxes on income	118	95	298		248
Net income before allocation to noncontrolling interests	479	433	1,278		1,116
Less: Net loss attributable to noncontrolling interests	0	0	(1)		0
Net income attributable to Zoetis Inc.	$ 479	$ 433	$ 1,279		$ 1,116
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)	$ 1.01	$ 0.91	$ 2.69		$ 2.33
Diluted (in dollars per share)	$ 1.00	$ 0.90	$ 2.67		$ 2.31
Weighted-average common shares outstanding:
Basic (in shares)	475.5	477.8	475.5		478.7
Diluted (in shares)	478.5	481.5	478.5		482.3
Dividends paid per common share (in dollars per share)	$ 0	$ 0	$ 0.400		$ 0.328

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