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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Telkomsel - Movements of pension benefit obligation (Details) Rp in Billions		12 Months Ended
	Jun. 07, 2017	Dec. 31, 2018 IDR (Rp)	Dec. 31, 2017 IDR (Rp)
Disclosure of defined benefit plans [line items]
Maximum percentage of surplus defined benefit plan	10
Threshold FSR	105
Pension benefit cost | Telkomsel
Disclosure of defined benefit plans [line items]
Pension benefit obligations at beginning of year		Rp (1,839)	Rp (1,193)
Periodic pension benefit cost		342	247
Actuarial gain (losses) recognised in OCI		(583)	584
Return on plan assets (excluding amount included in net interest expense)		68	(54)
Benefits paid by employer		(125)	(131)
Pension benefit obligations at end of year		Rp (1,541)	Rp (1,839)

X

- Definition

The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
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-Subparagraph f
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- Definition

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.

+ References

No definition available.

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- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2018-01-01
-Paragraph 140
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_140_a&doctype=Standard
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X

- Definition

The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plans assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Interest expense (income), net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_c_i&doctype=Standard
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- Definition

The amount of decrease (increase) in the net defined benefit liability (asset) resulting from the actuarial gain or losses.

+ References

No definition available.

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from total periodic pension benefit cost.

+ References

No definition available.

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- Definition

Threshold funding sufficiency ratio to establish additional benefit fund.

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- Definition

Maximum percentage of surplus defined benefit plan to establish additional benefit fund.

+ References

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