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Dividend per ordinary share - Schedule of dividends to shareholders of the parent (Details) - EUR (€)
€ / shares in Units, € in Millions
1 Months Ended 6 Months Ended 12 Months Ended
May 18, 2022
May 31, 2022
Oct. 31, 2021
Feb. 28, 2021
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Dividend per ordinary share [abstract]              
Dividends paid   € 1,545 € 820 € 468 € 636    
Dividends per ordinary share         € 0.62 € 0.62 € 0.12
Dividend per ordinary share paid   € 0.41 € 0.21 € 0.12 € 0.17    
Dividends           € 2,365 € 468
Additional dividend paid per share € 0.232 € 0.232          
Additional dividend paid € 380 € 874