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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Sensitivity Analysis (Details) - IDR (Rp) Rp in Billions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Discount Rate |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Percentage of increase in actuarial assumptions | 1.00% | 1.00% | 1.00%
Percentage of decrease in actuarial assumptions | 1.00% |  |
Rate of Compensation |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Percentage of increase in actuarial assumptions | 1.00% |  |
Percentage of decrease in actuarial assumptions | 1.00% |  |
Post-employment health care benefit cost | Discount Rate |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | Rp (1,605) | Rp (1,807) |
Amount of decrease in actuarial assumptions | 1,964 | 2,339 |
Post-employment health care benefit cost | Rate of Compensation |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | 1,985 | 2,248 |
Amount of decrease in actuarial assumptions | (1,686) | (1,844) |
Other post-employment benefit cost | Discount Rate |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | (13) | (15) |
Amount of decrease in actuarial assumptions | 14 | 17 |
Periodic pension benefit cost | Telkomsel | Discount Rate |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | (434) | (471) |
Amount of decrease in actuarial assumptions | 465 | 507 |
Periodic pension benefit cost | Telkomsel | Rate of Compensation |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | 455 | 494 |
Amount of decrease in actuarial assumptions | (429) | (463) |
Defined pension benefit obligation | Discount Rate |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | (2,040) | (2,305) |
Amount of decrease in actuarial assumptions | 2,419 | 2,754 |
Defined pension benefit obligation | Rate of Compensation |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | 1,571 | 1,733 |
Amount of decrease in actuarial assumptions | (1,439) | (1,547) |
Unfunded Pension | Discount Rate |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | (27) | (36) |
Amount of decrease in actuarial assumptions | 30 | 28 |
Unfunded Pension | Rate of Compensation |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Amount of increase in actuarial assumptions | 33 | 30 |
Amount of decrease in actuarial assumptions | Rp (30) | Rp (39) |

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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_145_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_145_a&doctype=Standard -URIDate 2021-03-24 + Details
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