SUPPLEMENTAL CASH FLOW INFORMATION (Details) - IDR (Rp) Rp in Billions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SUPPLEMENTAL CASH FLOW INFORMATION
Acquisitions of property and equipment - Credited to trade payables	Rp 5,459	Rp 4,275	Rp 5,525
Acquisitions of property and equipment - Advance paid		2,837
Acquisitions of property and equipment - Credited to obligations under finance leases		201	518
Acquisitions of property and equipment - Interest capitalization	99	270	328
Acquisitions of intangible assets: Credited to trade payables	Rp 684	Rp 235	Rp 846

The amount of advance paid for acquisitions of property and equipment.

No definition available.

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Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Not Available.

No definition available.

Name:	tlk_DisclosureOfSupplementalCashFlowInformationAbstract
Namespace Prefix:	tlk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of non-cash acquisition of intangible assets transferred to trade payables.

No definition available.

Name:	tlk_NoncashAcquisitionOfIntangibleAssetsTransferredToTradePayables
Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of non-cash acquisition of property and equipment related to interest capitalization.

No definition available.

Name:	tlk_NoncashAcquisitionOfPropertyAndEquipmentInterestCapitalization
Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of non-cash acquisition of property and equipment transferred to obligations under finance leases.

No definition available.

Name:	tlk_NoncashAcquisitionOfPropertyAndEquipmentTransferredToObligationsUnderFinanceLease
Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of non-cash acquisition of property and equipment transferred to trade payables.

No definition available.

Name:	tlk_NoncashAcquisitionOfPropertyAndEquipmentTransferredToTradePayables
Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration