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COMMITMENTS - Non-cancellable Lease Commitments Not Capitalized (Details) - EUR (€) € in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of non-cancellable operating leases commitments [line items] |  |
Total non-cancellable minimum lease payments | € 8 | € 22
Less than 1 year |  |
Disclosure of non-cancellable operating leases commitments [line items] |  |
Total non-cancellable minimum lease payments | 3 | 6
1 to 5 years |  |
Disclosure of non-cancellable operating leases commitments [line items] |  |
Total non-cancellable minimum lease payments | 3 | 11
Over 5 years |  |
Disclosure of non-cancellable operating leases commitments [line items] |  |
Total non-cancellable minimum lease payments | € 2 | € 5

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