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Legal Proceedings Legal (Details)
3 Months Ended
Mar. 15, 2019
defendants
subsidiary
Oct. 01, 2018
USD ($)
Aug. 28, 2018
USD ($)
Jul. 12, 2018
defendants
Feb. 12, 2018
USD ($)
Jul. 27, 2019
USD ($)
states
Loss Contingencies [Line Items]            
Damages sought         $ 0  
Number of states | states           50
Class Action Complaints Against Henry Schein Inc., Benco Dental Supply Company And Patterson Companies, Inc.            
Loss Contingencies [Line Items]            
Litigation settlement expenses           $ 17,666,000
Litigation settlement reserve           $ 28,263,000
Kirsten Johnsen V. Scott P Anderson Et Al            
Loss Contingencies [Line Items]            
Stock repurchased   $ 412,800,000 $ 412,800,000      
National Prescription Opiate Litigation, MDL No. 2804            
Loss Contingencies [Line Items]            
Number of defendants | defendants 67     26    
Number of subsidiaries | subsidiary 2