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Assets held for sale and liabilities directly associated with assets held for sale (Details) - EUR (€)
€ in Millions
Dec. 31, 2020
Dec. 31, 2019
Assets held for sale and liabilities directly associated with assets held for sale    
Non-current assets or disposal groups classified as held for sale € 44 € 18
Tangible assets    
Assets held for sale and liabilities directly associated with assets held for sale    
Non-current assets or disposal groups classified as held for sale € 44 € 18