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Share Buyback (Details)
€ in Millions
 12 Months Ended
Feb. 10, 2022
EUR (€)
Dec. 31, 2022
EUR (€)
tranche
shares
Dec. 31, 2021
EUR (€)
shares
Disclosure of classes of share capital [line items]      
Number of tranches completed | tranche   2  
Number of shares acquired (in shares) | shares   34,217,605 62,976,145
Repurchase of shares [1]   € (1,509) € (3,018)
Top of range      
Disclosure of classes of share capital [line items]      
Value of share buyback programme € 3,000    
[1] Repurchase of shares reflects the cost of acquiring ordinary shares as part of the share buyback programme announced on 29 April 2021 and 10 February 2022.