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FINANCIAL INSTRUMENTS - Cross-Currency Swap Contract (Details) € in Millions, ¥ in Millions, $ in Millions | Sep. 30, 2021 EUR (€) | Sep. 30, 2021 USD ($) | Sep. 30, 2021 JPY (¥) | Dec. 31, 2020 EUR (€) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 JPY (¥)
--- | --- | --- | --- | --- | --- | ---
US dollar |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | $ 10 |  |  | $ 10 |
Cross-currency swaps | US dollar | Maturity Period March 2025 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 500 |  |  | 500 |
Cross-currency swaps | US dollar | Maturity Period July 2027 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | 1,100 |  |  | 1,100 |
Cross-currency swaps | US dollar | Maturity Period Feb 2023 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount |  | $ 100 |  |  | $ 100 |
Cross-currency swaps | Euro | Maturity Period March 2025 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount | € | € 450 |  |  | € 450 |  |
Cross-currency swaps | Euro | Maturity Period July 2027 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount | € | € 976 |  |  | € 976 |  |
Cross-currency swaps | Japanese yen | Maturity Period Feb 2023 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  | ¥ 10,978 |  |  | ¥ 10,978

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