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PENSION AND OTHER POST-EMPLOYMENT BENEFITS (Details) $ in Millions, Rp in Billions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 IDR (Rp) | Dec. 31, 2018 IDR (Rp) | Dec. 31, 2017 IDR (Rp) | Dec. 31, 2019 IDR (Rp)
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations | $ 582 |  | Rp 5,555 |  | Rp 8,078
Employee benefit cost |  | Rp 1,176 | 1,600 | Rp 2,080 |
Amounts recognized in OCI |  | (2,520) | 5,418 | (2,869) |
Deferred tax effect at the applicable tax rates |  | 411 | (598) | 494 |
Defined benefit plan actuarial gain (loss) - net of tax | $ (152) | (2,109) | 4,820 | (2,375) |
Obligation under the Labor Law |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 507 |  | 690
Employee benefit cost |  | 136 | 113 | 62 |
Amounts recognized in OCI |  | (107) | 14 | (72) |
Post-employment health care benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 195 |  | 996
Employee benefit cost |  | 167 | 335 | 276 |
Amounts recognized in OCI |  | (634) | 2,559 | (551) |
Defined benefit plan actuarial gain (loss) - net of tax |  | (634) | 2,559 | (551) |
Other post-employment benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 419 |  | 366
Employee benefit cost |  | 33 | 32 | 42 |
Amounts recognized in OCI |  | (15) | 24 | (40) |
Defined benefit plan actuarial gain (loss) - net of tax |  | (15) | 24 | (40) |
Pension benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 4,434 |  | 6,026
Employee benefit cost |  | 840 | 1,120 | 1,700 |
Pension benefit cost | Telkomsel |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 1,541 |  | 2,209
Employee benefit cost |  | 314 | 342 | 247 |
Amounts recognized in OCI |  | (561) | 514 | (530) |
Defined benefit plan actuarial gain (loss) - net of tax |  | (561) | 514 | (530) |
Pension benefit cost | Telkomsat |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 0 |  | 0
Employee benefit cost |  | 0 | 0 | 0 |
Amounts recognized in OCI |  | 0 | 0 | 0 |
Pension benefit cost | MD Media |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 0 |  | 0
Employee benefit cost |  | 0 | 0 | 0 |
Amounts recognized in OCI |  | 0 | 0 | (2) |
Pension benefit cost | Infomedia |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  |  |  | 0
Employee benefit cost |  | 0 | 0 | 0 |
Amounts recognized in OCI |  | 0 | 0 | (1) |
Additional pension benefit obligation |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Defined benefit plan actuarial gain (loss) - net of tax |  | 7 | 934 | (419) |
The company | Funded pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Employee benefit cost |  | 362 | 511 | 557 |
Defined benefit plan actuarial gain (loss) - net of tax |  | (1,116) | 1,236 | (1,154) |
The company | Defined pension benefit obligation |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 1,057 |  | 2,338
Employee benefit cost |  | 362 | 511 | 557 |
Amounts recognized in OCI |  | (1,116) | 1,236 | (1,154) |
The company | Additional pension benefit obligation |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 6 |  |
Employee benefit cost |  | 1 | 69 | 657 |
Amounts recognized in OCI |  | 7 | 934 | (419) |
The company | Unfunded Pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 1,830 |  | Rp 1,479
Employee benefit cost |  | 163 | 198 | 239 |
Amounts recognized in OCI |  | (94) | 137 | (100) |
Defined benefit plan actuarial gain (loss) - net of tax |  | Rp (94) | Rp 137 | Rp (100) |

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