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TAXATION - Tax incentives (Details) - IDR (Rp)
Rp in Billions
 1 Months Ended 12 Months Ended
Sep. 22, 2017
Dec. 29, 2015
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Nov. 21, 2017
Dec. 15, 2016
Nov. 10, 2016
TAXATION                
Final income tax rate, maximum     6.00%          
Final income tax rate, minimum     3.00%          
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