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FINANCIAL RISK MANAGEMENT - Significant customer (Details) - Foreign exchange risk - IDR (Rp) Rp in Billions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
FINANCIAL RISK MANAGEMENT |  |
Foreign currency liabilities offset by time deposits and receivables (as a percent) | 25.00% |
USD |  |
FINANCIAL RISK MANAGEMENT |  |
Net exposure | Rp (43) | Rp 52
Yen |  |
FINANCIAL RISK MANAGEMENT |  |
Net exposure | Rp (5,406) | (6,163)
Minimum |  |
FINANCIAL RISK MANAGEMENT |  |
Duration of time deposits and hedging instruments | 3 months |
Maximum |  |
FINANCIAL RISK MANAGEMENT |  |
Duration of time deposits and hedging instruments | 12 months |
Financial asset | USD |  |
FINANCIAL RISK MANAGEMENT |  |
Net exposure | Rp 261 | 324
Financial asset | Yen |  |
FINANCIAL RISK MANAGEMENT |  |
Net exposure | 7 | 6
Financial liability | USD |  |
FINANCIAL RISK MANAGEMENT |  |
Net exposure | (304) | (272)
Financial liability | Yen |  |
FINANCIAL RISK MANAGEMENT |  |
Net exposure | Rp (5,413) | Rp (6,169)

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