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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 |  |  |  |  |  |

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