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PENSIONS AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS - Actuarial Assumptions (Details)
Jun. 30, 2023
Dec. 31, 2022
Switzerland    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 1.80% 2.05%
U.S. | Hourly pension | Bottom of range    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 4.95% 5.00%
U.S. | Hourly pension | Top of range    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 5.00% 5.05%
U.S. | Salaried pension    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 4.95% 5.05%
U.S. | OPEB | Bottom of range    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 4.95% 5.00%
U.S. | OPEB | Top of range    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 5.00% 5.05%
U.S. | Other benefits | Bottom of range    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 4.90% 4.95%
U.S. | Other benefits | Top of range    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 4.95% 5.00%
France | Retirements    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 3.70% 3.80%
France | Other benefits    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 3.75% 3.80%
Germany    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 3.70% 3.75%