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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Foreign currency translations (Details)
Dec. 31, 2017
Rp / RM
Rp / ¥
Rp / €
Rp / $
Rp / $
Dec. 31, 2016
Rp / RM
Rp / ¥
Rp / €
Rp / $
Rp / $
Buy | USD    
Foreign currency translations    
Foreign currency translations 13,565 13,470
Buy | Australian dollar    
Foreign currency translations    
Foreign currency translations 10,592 9,721
Buy | Euro    
Foreign currency translations    
Foreign currency translations | Rp / € 16,231 14,170
Buy | Yen    
Foreign currency translations    
Foreign currency translations | Rp / ¥ 120.48 115.01
Buy | Malaysian ringgits    
Foreign currency translations    
Foreign currency translations | Rp / RM 3,349 3,002
Sell | USD    
Foreign currency translations    
Foreign currency translations 13,570 13,475
Sell | Australian dollar    
Foreign currency translations    
Foreign currency translations 10,598 9,726
Sell | Euro    
Foreign currency translations    
Foreign currency translations | Rp / € 16,242 14,181
Sell | Yen    
Foreign currency translations    
Foreign currency translations | Rp / ¥ 120.55 115.10
Sell | Malaysian ringgits    
Foreign currency translations    
Foreign currency translations | Rp / RM 3,355 3,005