LONG-TERM LOANS AND OTHER BORROWINGS - Other borrowings agreements (Details) - IDR (Rp) Rp in Billions	12 Months Ended
Dec. 31, 2020	Mar. 29, 2019
PT Sarana Multi Infrastruktur \| Dayamitra
Borrowings and other credit facilities
Maximum debt to equity ratio	5
Minimum debt service coverage	100.00%
Pt Sarana Multi Infrastructure Other Borrowings One Issued On October 122016 [Member] \| Rupiah \| Dayamitra
Borrowings and other credit facilities
Interest rate adjustment (as a percent)	1.85%
Pt Sarana Multi Infrastructure Other Borrowings Issued On March 292019 [Member]
Borrowings and other credit facilities
Unused facility	Rp 106
Net debt to EBITDA ratio	4.00%
Pt Sarana Multi Infrastructure Other Borrowings Issued On March 292019 [Member] \| Telkomsat
Borrowings and other credit facilities
Total facility		Rp 164
Pt Sarana Multi Infrastructure Other Borrowings Issued On March 292019 [Member] \| Rupiah \| Telkomsat
Borrowings and other credit facilities
Total facility	Rp 164
Current period payment	Rp 11
The company \| PT Sarana Multi Infrastruktur
Borrowings and other credit facilities
Maximum debt to equity ratio	2
Minimum debt service coverage	125.00%
The company \| Pt Sarana Multi Infrastructure Other Borrowings Issued On March 292019 [Member]
Borrowings and other credit facilities
Total facility		Rp 2,836
Quarterly repayment of interest \| Pt Sarana Multi Infrastructure Other Borrowings Issued On March 292019 [Member] \| Rupiah \| Telkomsat
Borrowings and other credit facilities
Interest rate (as a percent)	8.49%
Quarterly repayment of interest \| The company \| Pt Sarana Multi Infrastructure Other Borrowings Issued On March 292019 [Member] \| Rupiah
Borrowings and other credit facilities
Total facility	Rp 2,836
Current period payment	Rp 350
Interest rate adjustment (as a percent)	8.49%
Repayment of Interest, Semi Annually \| Pt Sarana Multi Infrastructure Other Borrowings One Issued On October 122016 [Member] \| Rupiah \| Dayamitra
Borrowings and other credit facilities
Total facility	Rp 700
Current period payment	100
Repayment of Interest, Semi Annually \| Pt Sarana Multi infrastructure Other Borrowings Two Issued On March 292017 [Member] \| Rupiah \| Dayamitra
Borrowings and other credit facilities
Total facility	600
Current period payment	Rp 514
Interest rate (as a percent)	1.85%
Repayment of Interest, Semi Annually \| The company \| Pt Sarana Multi Infrastructure Other Borrowings Three Issued On November 142018 [Member] \| Rupiah
Borrowings and other credit facilities
Total facility	Rp 1,000
Current period payment	Rp 220
Interest rate (as a percent)	1.75%

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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