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BASIS OF PRESENTATION (Details)
$ in Millions, € in Billions
1 Months Ended 4 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Apr. 30, 2021
USD ($)
Mar. 31, 2021
EUR (€)
Sep. 30, 2021
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Mar. 31, 2020
investment
Organization, Consolidation And Presentation Of Financial Statements [Line Items]              
Number of Investments Impaired | investment             1
Proceeds from the issuance of long-term debt         $ 2,015 $ 4,108  
COVID-19              
Organization, Consolidation And Presentation Of Financial Statements [Line Items]              
Government Grant and other assistance benefit that was returned, cash paid       $ 107 $ 107    
Senior Notes              
Organization, Consolidation And Presentation Of Financial Statements [Line Items]              
Proceeds from the issuance of long-term debt | €     € 1.7        
Payments to redeem debt   $ 2,000          
Payment to satisfy the aggregate principal amount and the conversion premium in excess of the principal amount $ 1,100