SUPPLEMENTAL CASH FLOW INFORMATION (Details) - IDR (Rp) Rp in Billions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SUPPLEMENTAL CASH FLOW INFORMATION
Acquisitions of property and equipment - Credited to trade payables	Rp 5,175	Rp 5,459	Rp 4,275
Acquisitions of property and equipment - Advance paid			2,837
Acquisitions of property and equipment - Credited to obligations under finance leases			201
Acquisitions of property and equipment - Interest capitalization	160	99	270
Acquisitions of property and equipment - Additions of right of use assets credited to new leases	4,308	2,969
Acquisitions of intangible assets: Credited to trade payables	Rp 341	Rp 684	Rp 235

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

No definition available.

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The amount of non-cash acquisition of property and equipment related to right of use assets credited to new leases.

No definition available.

Name:	tlk_AmountOfNonCashAcquisitionOfPropertyAndEquipmentRelatedToRightOfUseAssetsCreditedToNewLeases.
Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
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Not Available.

No definition available.

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

No definition available.

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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.

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Namespace Prefix:	tlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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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.

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