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CONTRACT COSTS (Details) Rp in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 IDR (Rp)	Dec. 31, 2019 IDR (Rp)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 IDR (Rp)
Movement of contract costs
Beginning balance	Rp 1,185,000	Rp 1,244,000
Addition during the year	1,041,000	975,000
Amortisation during the year	(518,000)	(1,034,000)
Ending balance	1,708,000	1,185,000
Short term portion		(534,000)	$ (32)	Rp (454,000)
Long term portion		651,000	$ 89	1,254,000
Provision for impairment of contract costs		0		0
Cost to obtain contracts
Movement of contract costs
Beginning balance	696,000	405,000
Addition during the year	699,000	372,000
Amortisation during the year	(150,000)	(81,000)
Ending balance	1,245,000	696,000
Short term portion		(106,000)		(193,000)
Long term portion		590,000		1,052,000
Cost to fulfill
Movement of contract costs
Beginning balance	489,000	839,000
Addition during the year	342,000	603,000
Amortisation during the year	(368,000)	(953,000)
Ending balance	Rp 463,000	489,000
Short term portion		(428,000)		(261,000)
Long term portion		Rp 61,000		Rp 202,000

X

- Definition

The amount of amortisation for assets recognised from the costs incurred to obtain or fulfil contracts with customers. [Refer: Assets recognised from costs to obtain or fulfil contracts with customers; Amortisation expense]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 128
-Subparagraph b
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X

- Definition

The amount of assets recognised from the costs to obtain or fulfil contracts with customers. The costs to obtain a contract with a customer are the incremental costs of obtaining the contract that the entity would not have incurred if the contract had not been obtained. The costs to fulfil a contract with a customer are the costs that relate directly to a contract or to an anticipated contract that the entity can specifically identify.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2020-01-01
-Paragraph 128
-Subparagraph a
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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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- Definition

The amount of current assets recognised from the costs to obtain or fulfil contracts with customers.

+ References

No definition available.

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- Definition

The amount of non current assets recognised from the costs to obtain or fulfil contracts with customers.

+ References

No definition available.

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X

- Definition

The amount of increase in contract cost.

+ References

No definition available.

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X

- Definition

The amount of provision for the impairment of contract cost.

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