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Share-Based Payments (Narrative) (Details) - USD ($)
12 Months Ended 15 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of stock approved and registered with the SEC 25,000,000      
Shares available for future grant 10,000,000      
Period following separation service 60 days      
Expected stock price volatility [1] 27.94% 24.33% 23.08%  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price percentage of the fair market value price at date of grant 100.00%      
Award vesting period (in years) 3 years      
Contractual term (in years) 10 years      
Total compensation cost related to nonvested RSU awards not yet recognized, pre-tax $ 9,000,000      
Weighted-average period over which RSU cost is expected to be recognized (in years) 1 year      
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (in years) 3 years      
Total compensation cost related to nonvested RSU awards not yet recognized, pre-tax $ 43,000,000      
Weighted-average period over which RSU cost is expected to be recognized (in years) 1 year      
Granted (in shares) 261,182      
Shares outstanding 393,575      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 164.14      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 809,884 983,466   983,466
Deferred Stock Units (DSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 0      
Shares outstanding 64,599 74,688    
PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total compensation cost related to nonvested RSU awards not yet recognized, pre-tax $ 23,000,000      
Weighted-average period over which RSU cost is expected to be recognized (in years) 10 months 24 days      
Granted (in shares) 103,759      
Shares outstanding 98,088      
Expected stock price volatility 28.90% 20.20%    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 208.81      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 342,386 344,271   344,271
PSUs | Peer Companies        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected stock price volatility 38.10% 24.80%    
PSUs | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target units 0.00%      
PSUs | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of target units 200.00%      
Chief Executive Officer [Member] | PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 37,265      
Share-based Payment Arrangement, Plan Modification, Incremental Cost   $ 6,000,000 $ 2,000,000 $ 8,000,000
[1] Determined using an equal weighting between historical volatility of the Zoetis stock price and implied volatility. The selection of the blended historical and implied volatility approach was based on our assessment that this calculation of expected volatility is more representative of future stock price trends.