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FINANCIAL INSTRUMENTS - Sensitivity analysis (Details) - Foreign exchange risk
Rp in Billions
Dec. 31, 2019
IDR (Rp)
USD  
FINANCIAL RISK MANAGEMENT  
Increase in percent (as a percent) 1.00%
Equity change Rp 18
Yen  
FINANCIAL RISK MANAGEMENT  
Increase in percent (as a percent) 5.00%
Equity change Rp (25)