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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Long service employee benefit (Details) - IDR (Rp)
Rp in Billions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]      
Total obligation Rp 9,862 Rp 8,509 Rp 9,717
Long service employee benefit obligation Rp 1 1 Rp 3
Long Term Service Employee Benefit [Member]      
Disclosure of defined benefit plans [line items]      
Minimum employee working period for benefits 30 years    
Total obligation   1  
Long service employee benefit obligation   Rp 1