CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income before allocation to noncontrolling interests	$ 511	$ 376	$ 1,069	$ 799
Other comprehensive income (loss), net of tax:
Unrealized (losses)/gains on derivatives for cash flow hedges, net	(19)	(4)	20	(32)
Unrealized (losses)/gains on derivatives for net investment hedges, net	(8)	(14)	17	3
Foreign currency translation adjustments, net	37	(57)	70	(101)
Other comprehensive income, net of tax	10	(75)	107	(130)
Comprehensive income before allocation to noncontrolling interests	521	301	1,176	669
Less: Comprehensive loss attributable to noncontrolling interests	(1)	(1)	(2)	(1)
Comprehensive income attributable to Zoetis Inc.	$ 522	$ 302	$ 1,178	$ 670