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DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Capitalized Contract Cost The below table summarizes the amounts capitalized and amortized during the years ended December 31, 2020, 2019 and 2018:
Year Ended December 31,
202020192018
(in millions)CapitalizedAmortizedCapitalizedAmortizedCapitalizedAmortized
Deferred commission expense$29 $19 $45 $10 $33 $
Schedule of ASC 842 Adoption The impact on our balance sheets is as follows:
December 31, 2019
(in millions)As reportedBalance Using Previous StandardIncrease (Decrease)
Balance sheet
Assets
Operating lease right-of-use assets$55 $— $55 
Liabilities
Operating lease liabilities17 — 17 
Operating lease liabilities, noncurrent48 10 38 
Equity
Accumulated deficit(219)(219)—