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TRADE AND OTHER RECEIVABLES - Changes in Provision for expected credit losses (Details) - IDR (Rp)
Rp in Billions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Provision of impairment    
Beginning balance Rp (11,016)  
Ending balance (11,339) Rp (11,016)
Allowance for expected credit losses    
Provision of impairment    
Beginning balance 6,207 5,543
Allowance for expected credit losses 2,344 1,712
Receivables written off (191) (1,048)
Ending balance Rp 8,360 Rp 6,207