CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenues		$ 7,776	$ 6,675	$ 6,260
Costs and expenses:
Cost of Sales	[1]	2,303	2,057	1,992
Selling, general and administrative expenses	[1]	2,001	1,726	1,638
Research and development expenses	[1]	508	463	457
Amortization of intangible assets		161	160	155
Total Restructuring charges and certain acquisition-related costs		43	25	51
Interest expense, net of capitalized interest		224	231	223
Other (income)/deductions––net		48	17	(57)
Income before provision for taxes on income	[2]	2,488	1,996	1,801
Provision for taxes on income	[3]	454	360	301
Net income before allocation to noncontrolling interests		2,034	1,636	1,500
Less: Net loss attributable to noncontrolling interests		(3)	(2)	0
Net income attributable to Zoetis Inc.		$ 2,037	$ 1,638	$ 1,500
Earnings per share attributable to Zoetis Inc. stockholders:
Basic (in dollars per share)		$ 4.29	$ 3.44	$ 3.14
Diluted (in dollars per share)		$ 4.27	$ 3.42	$ 3.11
Weighted-average common shares outstanding:
Basic (in shares)		474,348	475,502	478,128
Diluted (in shares)		476,717	478,569	481,787
Dividends declared per common share		$ 1.075	$ 0.850	$ 0.692

[1] Exclusive of amortization of intangible assets, except as disclosed in Note 3. Significant Accounting Policies—Amortization of Intangible Assets, Depreciation and Certain Long-Lived Assets.

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

[3] In 2020, the Provision for taxes on income reflects the following: •the change in the jurisdictional mix of earnings, which includes the impact of the location of earnings from operations and repatriation costs. The jurisdictional mix of earnings can vary as a result of repatriation decisions, operating fluctuations in the normal course of business, the impact of non-deductible and non-taxable items, and the extent and location of other income and expense items, such as gains and losses on asset divestitures; •U.S. tax benefit related to U.S. Research and Development Tax Credit; •tax expense related to changes in uncertain tax positions (see D. Tax Contingencies); •a $29 million discrete tax benefit recorded in 2020 related to the excess tax benefits for share-based payments; •a $19 million net discrete tax benefit recorded in 2020 related to changes in various other tax items; •a $7 million discrete tax benefit recorded in 2020 related to the remeasurement of deferred tax assets and liabilities resulting from the integration of acquired businesses; •a $5 million discrete tax expense related to the changes in valuation allowances; •a $4 million discrete tax benefit recorded in 2020 related to a remeasurement of deferred tax assets and liabilities as a result of changes in statutory tax rates; and •a $4 million net discrete tax benefit recorded in 2020 related to the effective settlement of certain issues with tax authorities. (c)     In 2019, the Provision for taxes on income reflects the following: •the change in the jurisdictional mix of earnings, which includes the impact of the location of earnings from operations and repatriation costs. The jurisdictional mix of earnings can vary as a result of repatriation decisions, operating fluctuations in the normal course of business, the impact of non-deductible and non-taxable items, and the extent and location of other income and expense items, such as gains and losses on asset divestitures; •U.S. tax benefit related to U.S. Research and Development Tax Credit; •tax expense related to changes in uncertain tax positions (see D. Tax Contingencies); •the impact of the Global Intangible Low-Tax Income tax, a new provision of the Tax Act, which became effective for the company in the first quarter of 2019; •a $20 million discrete tax benefit recorded in 2019 related to the excess tax benefits for share-based payments; •an $18 million discrete tax benefit related to the changes in valuation allowances; •a $14 million net discrete tax benefit recorded in the third quarter of 2019 due to a change in tax basis related to purchase accounting; •a $12 million net discrete tax benefit recorded in 2019 related to changes in various other tax items; •a $10 million net discrete tax benefit recorded in 2019 related to the effective settlement of certain issues with tax authorities; and •an $8 million discrete tax benefit recorded in 2019 related to a remeasurement of deferred tax assets and liabilities as a result of changes in statutory tax rates.