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REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]    
Contract assets $ 15 $ 16
Contract liabilities - Current 14 22
Customer return assets 9 8
Customer incentive payments - current 43 43
Customer incentive payments - non-current $ 153 166
Minimum    
Disaggregation of Revenue [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction (in years) 3 years  
Maximum    
Disaggregation of Revenue [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction (in years) 7 years  
Other Current Liabilities    
Disaggregation of Revenue [Line Items]    
Contract liabilities - Current $ 14 22
Other non-current liabilities    
Disaggregation of Revenue [Line Items]    
Deferred income 6 6
Prepayments and other current assets    
Disaggregation of Revenue [Line Items]    
Customer incentive payments - current 43 43
Other non-current assets    
Disaggregation of Revenue [Line Items]    
Customer incentive payments - non-current $ 153 $ 166