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SHORT-TERM BANK LOANS AND CURRENT MATURITIES OF LONG-TERM BORROWINGS - Other significant information (Details) Rp in Millions, $ in Millions | Dec. 31, 2021 IDR (Rp) | Dec. 31, 2021 USD ($) | Dec. 24, 2021 IDR (Rp) | Oct. 29, 2021 IDR (Rp) | Oct. 22, 2021 IDR (Rp) | Oct. 14, 2021 IDR (Rp) | Sep. 10, 2021 IDR (Rp) | Aug. 26, 2021 IDR (Rp) | Apr. 23, 2021 IDR (Rp) | Mar. 29, 2021 IDR (Rp) | Nov. 27, 2020 IDR (Rp) | Jan. 15, 2019 IDR (Rp) | Mar. 30, 2017 IDR (Rp)
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HSBC Credit Agreement on November 27, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  |  |  |  |  | Rp 500,000 |  |
Bank Permata Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  |  | Rp 400,000 |  |  |  |  |
Bank of China Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  | Rp 1,000,000 |  |  |  |  |  |  |  |
Citibank Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  | Rp 500,000 |  |  |  |  |  |  |  |  |  |
Bank CIMB Niaga 2017 - 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  |  |  |  |  |  |  | Rp 495,000
BTPN 2017 To 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  |  |  |  |  |  | Rp 628,000 | Rp 400,000
Company, Infomedia and Telkom Infratel | DBS Credit Agreements |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  | Rp 750,000 |  |  |  |  |  |
Unused facilities | Rp 275,000 |  |  |  |  |  |  |  |  |  |  |  |
Company, Infomedia and Telkom Infratel | BNI.. |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  |  |  |  | Rp 735,000 |  |  |
Unused facilities | 108,000 |  |  |  |  |  |  |  |  |  |  |  |
Company, Metra, Infomedia and Telin | MUFG Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  | Rp 400,000 |  |  |  |  |  |  |  |  |
Unused facilities | 30,000 |  |  |  |  |  |  |  |  |  |  |  |
Company, Sigma and Melon | HSBC Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  |  |  |  | Rp 947,000 |  |  |  |
Unused facilities | 217,000 |  |  |  |  |  |  |  |  |  |  |  |
Company, Infomedia, MD Media and Telkom Infratel | MUFG Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  | 1,560,000 |  |  |  |  |  |  |  |  |
Unused facilities | 1,020,000 |  |  |  |  |  |  |  |  |  |  |  |
Company and GSD | MUFG Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  | Rp 900,000 |  |  |  |  |  |  |  |  |
Unused facilities | 521,000 |  |  |  |  |  |  |  |  |  |  |  |
Company, Metra, MD Media, Metranet and Telkomsel | HSBC Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility |  |  |  |  |  | Rp 1,000,000 |  |  |  |  |  |  |
Unused facilities | 21,000 |  |  |  |  |  |  |  |  |  |  |  |
United States Dollar | DBS maturing on July 31 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 20 |  |  |  |  |  |  |  |  |  |  |  |
United States Dollar | Bank CIMB Niaga 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 55 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | BNI maturing on November 7, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 475,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | BNI maturing on June 6, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 1,170,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | Mandir maturing on October 25, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 4,050,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | Mandri maturing on April 28, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | Rp 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 1.50% | 1.50% |  |  |  |  |  |  |  |  |  |  |
Rupiah | HSBC maturing on July 14 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | Rp 400,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | HSBC maturing on June 29, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 2,053,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | MUFG maturing on April 20 2023 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 3,030,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | DBS maturing on July 31 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | $ |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |
Rupiah | UOB maturing on December 20 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | BCA maturing on December 3, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | Bank CIMB Niaga 2017 - 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 700,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | BTPN 2017 To 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | 489,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | ICBC 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Total facility | Rp 272,000 |  |  |  |  |  |  |  |  |  |  |  |
Rupiah | Minimum | BNI maturing on November 7, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 7.90% | 7.90% |  |  |  |  |  |  |  |  |  |  |
Rupiah | Minimum | BNI maturing on June 6, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 2.10% | 2.10% |  |  |  |  |  |  |  |  |  |  |
Rupiah | Minimum | Mandir maturing on October 25, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.75% | 3.75% |  |  |  |  |  |  |  |  |  |  |
Rupiah | Maximum | BNI maturing on November 7, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 8.50% | 8.50% |  |  |  |  |  |  |  |  |  |  |
Rupiah | Maximum | BNI maturing on June 6, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 2.50% | 2.50% |  |  |  |  |  |  |  |  |  |  |
Rupiah | Maximum | Mandir maturing on October 25, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 9.00% | 9.00% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | HSBC maturing on July 14 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 7.40% | 7.40% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | DBS maturing on July 31 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 1.20% | 1.20% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | UOB maturing on December 20 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 1.75% | 1.75% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | BCA maturing on December 3, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.40% | 3.40% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | Minimum | HSBC maturing on December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 0.80% | 0.80% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | Minimum | MUFG maturing on April 20 2023 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 0.50% | 0.50% |  |  |  |  |  |  |  |  |  |  |
Monthly Repayment of Interest | Rupiah | Maximum | MUFG maturing on April 20 2023 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 0.70% | 0.70% |  |  |  |  |  |  |  |  |  |  |
Repayment of Interest, Semi Annually | United States Dollar | DBS maturing on July 31 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 3.25% | 3.25% |  |  |  |  |  |  |  |  |  |  |
Repayment of Interest, Semi Annually | United States Dollar | Bank CIMB Niaga 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 1.70% | 1.70% |  |  |  |  |  |  |  |  |  |  |
Repayment of Interest, Semi Annually | Rupiah | DBS maturing on July 31 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 10.75% | 10.75% |  |  |  |  |  |  |  |  |  |  |
Repayment of Interest, Semi Annually | Rupiah | Minimum | Bank CIMB Niaga 2017 - 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 1.50% | 1.50% |  |  |  |  |  |  |  |  |  |  |
Repayment of Interest, Semi Annually | Rupiah | Maximum | Bank CIMB Niaga 2017 - 2019 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 1.95% | 1.95% |  |  |  |  |  |  |  |  |  |  |
Quarterly repayment of interest | Rupiah | ICBC 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 2.36% | 2.36% |  |  |  |  |  |  |  |  |  |  |
Quarterly repayment of interest | Rupiah | Minimum | BTPN 2017 To 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 1.435% | 1.435% |  |  |  |  |  |  |  |  |  |  |
Quarterly repayment of interest | Rupiah | Maximum | HSBC maturing on June 29, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 1.00% | 1.00% |  |  |  |  |  |  |  |  |  |  |
Quarterly repayment of interest | Rupiah | Maximum | BTPN 2017 To 2020 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate adjustment (as a percent) | 2.00% | 2.00% |  |  |  |  |  |  |  |  |  |  |

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