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Provisions, income tax liabilities and other liabilities - Summary of Weighted Average Duration of Obligation for Pensions and Other Long-term Benefits in Principal Countries (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]      
Weighted average duration in main countries 10 years    
France      
Disclosure of defined benefit plans [line items]      
Weighted average duration in main countries 10 years 10 years 12 years
Germany      
Disclosure of defined benefit plans [line items]      
Weighted average duration in main countries 12 years 12 years 16 years
US      
Disclosure of defined benefit plans [line items]      
Weighted average duration in main countries 11 years 11 years 15 years
UK      
Disclosure of defined benefit plans [line items]      
Weighted average duration in main countries 13 years 13 years 17 years