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Shareholders' equity and share-based payments - Treasury shares (Details) - shares
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Shareholders' equity        
Number of treasury shares 24,392,703 15,474,234 32,473,281 8,376,756
TOTAL SE        
Shareholders' equity        
Number of treasury shares 24,392,703 15,474,234 32,473,281  
Percentage of share capital represented by treasury shares 0.92% 0.59% 1.23%  
Shares acquired with the intention to cancel them 23,284,409 11,051,144 27,360,278  
TOTAL SE | TOTAL share performance plans for Group employees        
Shareholders' equity        
Shares allocated or intended to be allocated to share-based payment plans 1,055,446 4,357,324 5,044,817  
TOTAL SE | New share performance or purchase options plans        
Shareholders' equity        
Shares allocated or intended to be allocated to share-based payment plans 52,848 65,766 68,186