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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Additional pension benefit obligation (Details) - IDR (Rp)
Rp in Thousands
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Funded pension | The company        
Disclosure of defined benefit plans [line items]        
Discount rate   7.25% 7.00% 6.50%
Defined Contribution Other Benefit Program        
Disclosure of defined benefit plans [line items]        
Threshold fund adequacy ratio 102.00%      
Employer's contribution Rp 120      
Discount rate   7.25% 7.00% 8.00%