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COMMITMENTS - Tangible and Intangible Asset Commitments (Details) - EUR (€)
€ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of capital expenditures commitments [line items]    
Total tangible and intangible asset commitments € 49 € 91
Property, plant and equipment    
Disclosure of capital expenditures commitments [line items]    
Total tangible and intangible asset commitments 48 89
Computer Software    
Disclosure of capital expenditures commitments [line items]    
Total tangible and intangible asset commitments € 1 € 2