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PENSION AND OTHER POST-EMPLOYMENT BENEFITS (Details) Rp in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 IDR (Rp) | Dec. 31, 2017 IDR (Rp) | Dec. 31, 2016 IDR (Rp) | Dec. 31, 2018 IDR (Rp)
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations | $ 386 |  | Rp 10,195,000 |  | Rp 5,555,000
Employee benefit cost |  | Rp 1,600,000 | 2,080,000 | Rp 1,361,000 |
Amounts recognized in OCI |  | 5,418,000 | (2,869,000) | (2,266,000) |
Deferred tax effect at the applicable tax rates |  | (598,000) | 494,000 | 208,000 |
Defined benefit plan actuarial gain (loss) - net of tax | $ 335 | 4,820,000 | (2,375,000) | (2,058,000) |
Other employee benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 427,000 |  | 507,000
Employee benefit cost |  | 113,000 | 62,000 | 82,000 |
Amounts recognized in OCI |  | 14,000 | (72,000) | (33,000) |
Post-employment health care benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 2,419,000 |  | 195,000
Employee benefit cost |  | 335,000 | 276,000 | 163,000 |
Amounts recognized in OCI |  | 2,559,000 | (551,000) | (1,309,000) |
Defined benefit plan actuarial gain (loss) - net of tax |  | 2,559,000 | (551,000) | (1,309,000) |
Other post-employment benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 510,000 |  | 419,000
Employee benefit cost |  | 32,000 | 42,000 | 48,000 |
Amounts recognized in OCI |  | 24,000 | (40,000) | (20,000) |
Defined benefit plan actuarial gain (loss) - net of tax |  | 24,000 | (40,000) | (20,000) |
Pension benefit cost |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 6,839,000 |  | 4,434,000
Employee benefit cost |  | 1,120,000 | 1,700,000 | 1,068,000 |
Pension benefit cost | Telkomsel |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 1,839,000 |  | 1,541,000
Employee benefit cost |  | 342,000 | 247,000 | 181,000 |
Amounts recognized in OCI |  | 514,000 | (530,000) | (292,000) |
Defined benefit plan actuarial gain (loss) - net of tax |  | 514,000 | (530,000) | (292,000) |
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 | (2,000) | (1,000) |
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 | (1,000) | 0 |
Additional pension benefit obligation |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Defined benefit plan actuarial gain (loss) - net of tax |  | 934,000 | (419,000) |  |
The company | Funded pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Employee benefit cost |  | 511,000 | 557,000 | 608,000 |
Defined benefit plan actuarial gain (loss) - net of tax |  | 1,236,000 | (1,154,000) | (492,000) |
The company | Defined pension benefit obligation |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 1,540,000 |  | 1,057,000
Employee benefit cost |  | 511,000 | 557,000 | 608,000 |
Amounts recognized in OCI |  | 1,236,000 | (1,154,000) | (492,000) |
The company | Additional pension benefit obligation |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 1,076,000 |  | 6,000
Employee benefit cost |  | 69,000 | 657,000 |  |
Amounts recognized in OCI |  | 934,000 | (419,000) |  |
The company | Unfunded Pension |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |
Pension benefits and other post-employment benefit obligations |  |  | 2,384,000 |  | Rp 1,830,000
Employee benefit cost |  | 198,000 | 239,000 | 279,000 |
Amounts recognized in OCI |  | 137,000 | (100,000) | (119,000) |
Defined benefit plan actuarial gain (loss) - net of tax |  | Rp 137,000 | Rp (100,000) | Rp (119,000) |

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