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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Maturity (Details) - IDR (Rp) Rp in Billions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Post-employment health care benefit cost |  |
Disclosure of defined benefit plans [line items] |  |
Weighted average duration of DBO | 13 years 4 months 2 days | 17 years 4 months 28 days
Post-employment health care benefit cost | Within next 10 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 6,064 | Rp 5,620
Post-employment health care benefit cost | Within 10-20 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 8,001 | 6,913
Post-employment health care benefit cost | Within 20-30 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 7,501 | 6,217
Post-employment health care benefit cost | Within 30-40 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 4,123 | 3,193
Post-employment health care benefit cost | Within 40-50 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 958 | 661
Post-employment health care benefit cost | Within 50-60 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 42 | 22
Post-employment health care benefit cost | Within 60-70 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | Rp 0
Other post-employment benefit cost |  |
Disclosure of defined benefit plans [line items] |  |
Weighted average duration of DBO | 3 years 7 months 24 days | 3 years 1 month 17 days
Other post-employment benefit cost | Within next 10 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 418 | Rp 485
Other post-employment benefit cost | Within 10-20 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 68 | 91
Other post-employment benefit cost | Within 20-30 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 38 | 39
Other post-employment benefit cost | Within 30-40 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 3 | Rp 3
Pension benefit cost | Telkomsel |  |
Disclosure of defined benefit plans [line items] |  |
Weighted average duration of DBO | 10 years 5 months 9 days | 10 years 6 months 29 days
Pension benefit cost | Telkomsel | Within next 10 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 3,486 | Rp 2,498
Pension benefit cost | Telkomsel | Within 10-20 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 9,420 | 7,880
Pension benefit cost | Telkomsel | Within 20-30 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 7,150 | 6,680
Pension benefit cost | Telkomsel | Within 30-40 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 1,267 | Rp 1,580
The company | Defined pension benefit obligation |  |
Disclosure of defined benefit plans [line items] |  |
Weighted average duration of DBO | 10 years 1 month 28 days | 9 years 1 month 10 days
The company | Defined pension benefit obligation | Within next 10 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 18,392 | Rp 16,370
The company | Defined pension benefit obligation | Within 10-20 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 21,855 | 20,349
The company | Defined pension benefit obligation | Within 20-30 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 20,154 | 16,207
The company | Defined pension benefit obligation | Within 30-40 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 15,351 | 9,400
The company | Defined pension benefit obligation | Within 40-50 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 4,265 | 3,383
The company | Defined pension benefit obligation | Within 50-60 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 468 | 644
The company | Defined pension benefit obligation | Within 60-70 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 32 | 62
The company | Defined pension benefit obligation | Within 70-80 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | Rp 2
The company | Additional pension benefit obligation |  |
Disclosure of defined benefit plans [line items] |  |
Weighted average duration of DBO | 10 years 1 month 28 days | 9 years 1 month 10 days
The company | Additional pension benefit obligation | Within 20-30 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | Rp 20
The company | Additional pension benefit obligation | Within 30-40 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | 38
The company | Additional pension benefit obligation | Within 40-50 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | 30
The company | Additional pension benefit obligation | Within 50-60 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | 50
The company | Additional pension benefit obligation | Within 60-70 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments |  | Rp 101
The company | Unfunded Pension |  |
Disclosure of defined benefit plans [line items] |  |
Weighted average duration of DBO | 4 years 8 months 9 days | 3 years 11 months 19 days
The company | Unfunded Pension | Within next 10 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 1,587 | Rp 948
The company | Unfunded Pension | Within 10-20 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 125 | 160
The company | Unfunded Pension | Within 20-30 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | 52 | 29
The company | Unfunded Pension | Within 30-40 years |  |
Disclosure of defined benefit plans [line items] |  |
Estimated future benefit payments | Rp 18 | Rp 9

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