LONG-TERM LOANS AND OTHER BORROWINGS - Other borrowings (Details) Rp in Billions	12 Months Ended
Dec. 31, 2017 IDR (Rp)
Other borrowings
Borrowings and other credit facilities
Maximum debt to equity ratio	5
Net debt to EBITDA ratio	4.00%
Minimum debt service coverage	100.00%
Rupiah \| Sarana Multi Infrastruktur October 12 2016
Borrowings and other credit facilities
Total loans and other borrowings	Rp 700
Interest rate basis	3 months JIBOR
Interest rate adjustment (as a percent)	2.20%
Rupiah \| Sarana Multi Infrastruktur March 29 2017
Borrowings and other credit facilities
Total loans and other borrowings	Rp 600
Interest rate basis	3 months JIBOR
Interest rate adjustment (as a percent)	2.20%

The amount of outstanding funds that the entity is obligated to repay.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The ratio of net operating income to total debt service, which is necessary to be maintained under the terms of debt instrument.

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The ratio of net debt to adjusted earnings before, interest, taxes, depreciation and amortization allowed under the terms of debt instrument.

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