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PENSIONS AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS - Net Defined Benefit Obligations by Country (Details)
€ in Millions, $ in Millions
Jun. 30, 2023
EUR (€)
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
USD ($)
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligations € 868 € 864  
Plan assets (475) (461)  
Net defined benefit liability 393 403 $ 403
France      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligations 122 117  
Plan assets (6) (6)  
Net defined benefit liability 116 111  
Germany      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligations 94 100  
Plan assets (1) (1)  
Net defined benefit liability 93 99  
Switzerland      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligations 260 249  
Plan assets (245) (236)  
Net defined benefit liability 15 13  
United States      
Disclosure of net defined benefit liability (asset) [line items]      
Defined benefit obligations 392 398  
Plan assets (223) (218)  
Net defined benefit liability € 169 € 180