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BUSINESS COMBINATIONS - ADDITIONAL INFORMATION (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
May 01, 2018
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2019
Business Acquisition [Line Items]          
Goodwill $ 3,986   $ 3,986 $ 3,431 $ 3,397
Transaction related costs     16    
Privately Held Dental Service          
Business Acquisition [Line Items]          
Payments to acquire equity method investments     $ 45    
Reclassification out of Accumulated Other Comprehensive Income | DIO Corporation          
Business Acquisition [Line Items]          
Unrealized holding gain, available-for-sale securities       $ 44  
Straight Smile LLC          
Business Acquisition [Line Items]          
Percentage of voting interest acquired 100.00%   100.00%    
Payments to acquire businesses, gross $ 1,000        
Total acquisition consideration     $ 1,000    
Goodwill $ 631   $ 631    
OraMetrix, Inc.          
Business Acquisition [Line Items]          
Total acquisition consideration   $ 120      
Goodwill   58      
Additional consideration based on earn out   $ 30