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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, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of defined benefit plans [line items]      
Total obligation Rp 10,043 Rp 9,862 Rp 8,509
Long service employee benefit obligation Rp 0 1 Rp 1
Long Term Service Employee Benefit [Member]      
Disclosure of defined benefit plans [line items]      
Minimum employee working period for benefits 30 years    
Total obligation Rp 1 1  
Long service employee benefit obligation Rp 1 Rp 1  
Post-employment health care benefit cost | Employee hired before November 1, 1995      
Disclosure of defined benefit plans [line items]      
Minimum employee working period for benefits 20 years