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COMMITMENTS AND CONTINGENCIES (Details) € in Millions, $ in Millions | 3 Months Ended | 12 Months Ended | 33 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2024 EUR (€) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€) | Aug. 31, 2021 USD ($) | Aug. 31, 2021 EUR (€) | Mar. 31, 2024 EUR (€) | Jan. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€)
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits | $ 68 |  |  | $ 67 |  |  |  |  |  |
Deferred income tax benefit | 35 |  | $ 340 |  |  |  |  |  |  |
Partner liability insurance maximum coverage per occurrence | 1 |  |  |  |  |  |  |  |  |
Standby Letters of Credit and Bank Guarantees |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |
Letters of credit and bank guarantees issued | 953 |  |  | 533 |  |  |  |  |  |
Unfavorable Regulatory Action |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |
Accruals for loss contingencies | € |  |  |  |  |  |  |  |  | € 486 |
Loss contingency accrual, provision |  |  |  | 530 | € 486 |  |  |  |  |
Italian Tax Matters |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits | 36 |  |  | 36 |  |  |  | € 33 |  | € 33
Deferred income tax benefit |  |  |  | 17 | 15 |  |  |  |  |
Prepayments made to appeal a litigation matter or avoid collection enforcement | 80 |  |  |  |  |  |  | € 74 |  |
Italian Tax Matters | Tax Years 2013 Through 2018 |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |
Tax assessments |  |  |  |  |  | $ 271 | € 251 |  |  |
Pension-related litigation |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |  |
Loss contingency accrual, provision | $ 21 | € 19 |  | $ 276 | € 253 |  |  |  |  |

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