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Consolidated shareholders’ equity - Summary of Repurchases Program (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
2022      
Disclosure of classes of share capital [line items]      
Number of shares (in shares) 1,510,000    
Value € 137    
2021      
Disclosure of classes of share capital [line items]      
Number of shares (in shares) 3,976,992 2,765,388  
Value € 360 € 242  
2020      
Disclosure of classes of share capital [line items]      
Number of shares (in shares)   1,758,569 5,685,426
Value   € 140 € 461
2019      
Disclosure of classes of share capital [line items]      
Number of shares (in shares)     3,982,939
Value     € 361