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TAXES ON INCOME (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Apr. 01, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Effective income tax rate 23.40% 23.70% 23.10% 23.90%  
Changes in reserves for uncertain tax positions $ 6        
Share-based compensation, excess tax benefit, amount $ 6 $ 3 $ 15 $ 15  
Effective tax rate on remeasurement in previously held interest   11.80%   11.80%  
Equity interest in acquiree, remeasurement gain       $ 70  
Disposed of by Sale | Q2 Solutions          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Effective income tax rate     17.60%    
Percent of ownership interest sold         40.00%