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TAXATION - Tax incentives (Details) - IDR (Rp)
Rp in Billions
 12 Months Ended
Sep. 22, 2017
Dec. 29, 2015
Dec. 31, 2017
Dec. 31, 2016
Nov. 21, 2017
Dec. 15, 2016
Nov. 10, 2016
TAXATION              
Final income tax rate, maximum     3.00%        
Final income tax rate, minimum     6.00%        
Advance payment on revaluation Rp 2 Rp 750          
Period for approval of revaluation   30 days          
Approved portion of revaluation of fixed assets - phase one             Rp 212
Approved portion of revaluation of fixed assets - phase two     Rp 540   Rp 540 Rp 538  
Estimated increment in revaluation of fixed assets     8,982   Rp 8,982 Rp 8,961 Rp 7,078
Deferred tax assets on fixed assets revaluation for tax purpose     Rp (1,796) Rp (1,415)