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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenue Recognition and Advertising Costs) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]      
Term of subscription-based license agreements (in years) 1 year    
Advertising costs $ 164 $ 124 $ 104
Amortization period of deferred sales commissions 3 years