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REVENUE - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Disaggregation of Revenue [Line Items]          
Accrued sales returns $ 41   $ 41   $ 31
Accrued sales incentives $ 58   $ 58   $ 58
Service Revenue [Member]          
Disaggregation of Revenue [Line Items]          
Percent of Total Company Revenue 1.00% 1.00% 1.00% 1.00%