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SHARE-BASED COMPENSATION - Narrative (Details) - EUR (€) € / shares in Units, € in Millions | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Share Based Payment Plans [line items] |  |
Number of instruments other equity instruments vested | 1,338,744 |
Expense from share-based payment transactions with employees | € 12 | € 10
PSUs |  |
Share Based Payment Plans [line items] |  |
Vesting period | 3 years |
Fair value at grant date (in euros) (in EUR per share) | € 24.84 |
PSUs | Bottom of range |  |
Share Based Payment Plans [line items] |  |
Percentage of vesting multiplier | 0.00% |
PSUs | Top of range |  |
Share Based Payment Plans [line items] |  |
Percentage of vesting multiplier | 20000.00% |
RSUs |  |
Share Based Payment Plans [line items] |  |
Vesting period | 3 years |
Number of instruments other equity instruments vested | 473,952 |
Fair value at grant date (in euros) (in EUR per share) | € 18.14 |
PSUs |  |
Share Based Payment Plans [line items] |  |
Percentage of vesting multiplier | 100.00% |
Number of instruments other equity instruments vested | 864,792 |
Share price at grant date (in EUR per share) | € 18.14 |

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