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Other risks and contingent liabilities (Details)
6 Months Ended 252 Months Ended
Jul. 04, 2023
shareholder
Jun. 30, 2023
Jun. 30, 2023
subsidiary
item
Dec. 31, 2040
Disputes relating to Climate | United States        
Disclosure of contingent liabilities        
Number of subsidiaries summoned for liability in climate change | subsidiary     1  
Number of litigations in which Corporation and subsidiaries were summoned | item     1  
Dispute relating to completion of Vigilance Plan | France        
Disclosure of contingent liabilities        
Percentage of reduction in net direct and indirect CO2 emissions, per injunction sought after by certain associations and local communities before Court of Justice       40.00%
Dispute relating to annulment of resolution no.3 passed by Annual Shareholders' Meeting on May 26, 2023 | France        
Disclosure of contingent liabilities        
Number of shareholders seeking annulment of resolution no.3 passed by Annual Shareholders’ Meeting on May 26, 2023 9      
Number of shareholder companies seeking annulment of resolution no.3 passed by Annual Shareholders’ Meeting on May 26, 2023 2      
Number of shareholder individuals seeking annulment of resolution no.3 passed by Annual Shareholders’ Meeting on May 26, 2023 7      
Yemen LNG Company Limited        
Disclosure of contingent liabilities        
Stake held in associate (as a percent)   39.62%