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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, REVENUE RECOGNITION AND ADVERTISING COSTS (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accounting Policies [Abstract]        
Term of subscription-based license agreements     1 year  
Deferred sales commission, amortization period     3 years  
Advertising expense $ 97 $ 79 $ 252 $ 202