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Shareholders' equity and share-based payments - Treasury shares (Details) - shares
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Shareholders' equity      
Treasury shares 8,376,756 10,587,822 113,967,758
TOTAL S.A.      
Shareholders' equity      
Treasury shares 8,376,756 10,587,822 13,636,490
Percentage of share capital 0.33% 0.44% 0.56%
TOTAL S.A. | TOTAL share grant plans for Group employees      
Shareholders' equity      
Shares allocated or intended to be allocated to share purchase option plans or share grant plans 8,345,847 10,555,887 13,603,525
TOTAL S.A. | New TOTAL share purchase option plans or new share grant plans      
Shareholders' equity      
Shares allocated or intended to be allocated to share purchase option plans or share grant plans 30,909 31,935 32,965
Group consolidated subsidiaries      
Shareholders' equity      
Treasury shares     100,331,268
Percentage of share capital     4.11%
Total Nucleaire      
Shareholders' equity      
Treasury shares     2,023,672
Subsidiaries of Elf Aquitaine (Financiere Valorgest, Sogapar and Fingestval)      
Shareholders' equity      
Treasury shares     98,307,596