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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Telkomsel - Movements of pension benefit obligation (Details) - IDR (Rp)
Rp in Billions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of defined benefit plans [line items]    
Pension benefit obligations at beginning of year Rp 9,717 Rp 10,816
Return on plan assets (excluding amount included in net interest expense) 82 720
Employer's contributions (719) (226)
Benefits paid (291)  
Pension benefit obligations at end of year 8,509 Rp 9,717
Telkomsel    
Disclosure of defined benefit plans [line items]    
Pension benefit obligations at end of year Rp 853