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Debt - Narrative (Details)
12 Months Ended
Feb. 06, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 29, 2018
USD ($)
Dec. 30, 2017
USD ($)
Dec. 31, 2022
Apr. 01, 2019
Feb. 07, 2019
USD ($)
Line of Credit Facility [Line Items]                
Debt repayment     $ 43,000,000 $ 2,000,000 $ 0      
Syndicated credit agreement 2019 | Syndicated Credit Agreement                
Line of Credit Facility [Line Items]                
Maximum Amount Available     $ 1,500,000,000         $ 1,500,000,000
Credit agreement term     5 years          
Leverage ratio (less than 5.50%)             5.50  
Interest coverage ratio (greater than)             3.00  
Long-term term loan and capital lease obligations       $ 23,000,000        
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Animal Health Business                
Line of Credit Facility [Line Items]                
Debt repayment $ 23,000,000              
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Forecast                
Line of Credit Facility [Line Items]                
Leverage ratio (less than 5.50%)   5.00       3.75    
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Revolving line of credit                
Line of Credit Facility [Line Items]                
Maximum Amount Available     $ 300,000,000          
Unused capacity fee     0.35%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Term loan                
Line of Credit Facility [Line Items]                
Quarterly amortization rate     5.00%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Term loan | Forecast                
Line of Credit Facility [Line Items]                
Debt repayment   $ 60,000,000            
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Minimum | Revolving line of credit                
Line of Credit Facility [Line Items]                
Unused capacity fee     0.175%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Maximum | Revolving line of credit                
Line of Credit Facility [Line Items]                
Unused capacity fee     0.40%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | LIBOR                
Line of Credit Facility [Line Items]                
Floor rate     0.00%          
Variable rate     2.25%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | LIBOR | Minimum                
Line of Credit Facility [Line Items]                
Variable rate     1.25%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | LIBOR | Maximum                
Line of Credit Facility [Line Items]                
Variable rate     2.50%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Alternative base rate                
Line of Credit Facility [Line Items]                
Floor rate     1.00%          
Variable rate     1.25%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Alternative base rate | Minimum                
Line of Credit Facility [Line Items]                
Variable rate     0.25%          
Syndicated credit agreement 2019 | Syndicated Credit Agreement | Alternative base rate | Maximum                
Line of Credit Facility [Line Items]                
Variable rate     1.50%