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REVENUES - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Contract assets $ 185   $ 198
Contract liabilities 91   $ 97
Change in estimate of variable consideration 332 $ 38  
Royalty      
Disaggregation of Revenue [Line Items]      
Contract with customer, performance obligation satisfied in previous period $ 226 $ 188