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BUSINESS COMBINATIONS - ADDITIONAL INFORMATION (Details) - USD ($)
3 Months Ended 9 Months Ended
Jul. 01, 2021
Jun. 04, 2021
Jun. 01, 2021
Apr. 01, 2021
Feb. 01, 2021
Jan. 21, 2021
Dec. 31, 2020
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Business Acquisition [Line Items]                    
Intangible assets $ 3,000,000                  
Goodwill             $ 3,986,000,000 $ 4,000,000,000 $ 4,000,000,000  
Proceeds from divestiture of business                 27,000,000 $ 0
Gain on sale of business                 14,000,000 $ 0
UNITED KINGDOM                    
Business Acquisition [Line Items]                    
Payments to acquire equity method investments   $ 16,000,000                
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Digital Dentistry Business                    
Business Acquisition [Line Items]                    
Proceeds from divestiture of business       $ 8,000,000            
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Investment Casting Business                    
Business Acquisition [Line Items]                    
Proceeds from divestiture of business         $ 19,000,000          
Gain on sale of business                 13,000,000  
Dental Business | SWITZERLAND                    
Business Acquisition [Line Items]                    
Total acquisition consideration 7,000,000                  
Other current assets 4,000,000                  
Intangible assets 3,000,000                  
Other long term liabilities 1,000,000                  
Fair value of the previously-held interest 4,000,000                  
Goodwill $ 5,000,000                  
Propel Orthodontics                    
Business Acquisition [Line Items]                    
Other current assets     $ 4,000,000              
Intangible assets     66,000,000              
Goodwill     63,000,000              
Payments to acquire businesses, gross     $ 132,000,000              
Reduction in goodwill (less than)               $ 2,000,000    
Datum Dental, Ltd                    
Business Acquisition [Line Items]                    
Total acquisition consideration           $ 103,000,000        
Other current assets           2,000,000        
Intangible assets           76,000,000        
Goodwill           39,000,000        
Payments to acquire businesses, gross           94,000,000        
Reduction in goodwill (less than)                 (6,000,000)  
Business combination, contingent consideration arrangements, range of outcomes, value, high           $ 10,000,000        
Percentage of voting interest acquired           100.00%        
Additional consideration based on earn out           $ 9,000,000        
Straight Smile LLC                    
Business Acquisition [Line Items]                    
Intangible assets             416,000,000      
Goodwill             626,000,000      
Payments to acquire businesses, gross             $ 1,000,000,000      
Reduction in goodwill (less than)                 $ 5,000,000  
Percentage of voting interest acquired             100.00%