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Discontinued operations - Cash flows (Details) - Discontinued operations - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash flows from Discontinued operations      
Net cash used in operating activities € (7) € (33) € (14)
Net cash from/(used in) investing activities 9 10 (16)
Net cash flow for the period € 2 € (23) € (30)