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OTHER (INCOME) EXPENSE, NET - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 20, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Schedule Of Other Income And Expenses [Line Items]            
Milestone achievement, included in net (loss) gain on sale of assets   $ (21) $ 0 $ 2 $ 1  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Amoun            
Schedule Of Other Income And Expenses [Line Items]            
Impairment of long-lived assets   $ 26       $ 210
Milestone Payment Related To Certain Product            
Schedule Of Other Income And Expenses [Line Items]            
Milestone achievement, included in net (loss) gain on sale of assets       $ 25    
Insurance Coverage Lawsuit | Settled Litigation            
Schedule Of Other Income And Expenses [Line Items]            
Aggregate amount to be received $ 213