CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 1,948	$ 1,548	$ 3,819		$ 3,082
Costs and expenses:
Cost of sales	568	451	1,117		910
Selling, general and administrative expenses	495	393	904		782
Research and development expenses	120	111	238		218
Amortization of intangible assets	41	40	81		80
Restructuring charges and certain acquisition-related costs	21	8	30		17
Interest expense, net of capitalized interest	57	58	114		111
Other (income)/deductions—net	10	5	12		(15)
Income before provision for taxes on income	636	482	1,323	[1]	979	[1]
Provision for taxes on income	125	106	254		180
Net income before allocation to noncontrolling interests	511	376	1,069		799
Less: Net loss attributable to noncontrolling interests	(1)	(1)	(2)		(1)
Net income attributable to Zoetis Inc.	$ 512	$ 377	$ 1,071		$ 800
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)	$ 1.08	$ 0.79	$ 2.25		$ 1.68
Diluted (in dollars per share)	$ 1.07	$ 0.79	$ 2.24		$ 1.67
Weighted-average common shares outstanding:
Basic (in shares)	474.8	475.3	475.2		475.4
Diluted (in shares)	477.0	478.1	477.5		478.6
Dividends paid per common share (in dollars per share)	$ 0.250	$ 0.200	$ 0.500		$ 0.400

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