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CASH AND CASH EQUIVALENTS - Breakdown of cash and cash equivalents by related parties and third parties (Details) € in Millions, ¥ in Millions, RM in Millions, MOP$ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, Rp in Billions | Dec. 31, 2019 JPY (¥) | Dec. 31, 2019 TWD ($) | Dec. 31, 2019 SGD ($) | Dec. 31, 2019 MOP (MOP$) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 AUD ($) | Dec. 31, 2019 HKD ($) | Dec. 31, 2019 MYR (RM) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 IDR (Rp) | Dec. 31, 2018 JPY (¥) | Dec. 31, 2018 TWD ($) | Dec. 31, 2018 SGD ($) | Dec. 31, 2018 MOP (MOP$) | Dec. 31, 2018 EUR (€) | Dec. 31, 2018 AUD ($) | Dec. 31, 2018 HKD ($) | Dec. 31, 2018 MYR (RM) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 IDR (Rp) | Dec. 31, 2017 IDR (Rp) | Dec. 31, 2016 IDR (Rp)
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CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | Rp 4,461 |  |  |  |  |  |  |  |  |  | Rp 4,290 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 13,744 |  |  |  |  |  |  |  |  |  | 13,113 |  |
Provision for impairment of cash and cash equivalents |  |  |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  | (4) |  |
Total cash and cash equivalents |  |  |  |  |  |  |  |  | $ 1,314 | 18,241 |  |  |  |  |  |  |  |  | $ 1,256 | 17,435 | Rp 25,145 | Rp 29,767
Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash on hand |  |  |  |  |  |  |  |  |  | 37 |  |  |  |  |  |  |  |  |  | 36 |  |
Third parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 1,355 |  |  |  |  |  |  |  |  |  | 952 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 2,009 |  |  |  |  |  |  |  |  |  | 1,907 |  |
PT Bank HSBC Indonesia ("HSBC") | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  | 1 |  |
HSBC Hongkong and Shanghai | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 14 | 188 |  |  |  |  |  |  |  |  | 12 | 181 |  |
HSBC Hongkong and Shanghai | HKD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  | $ 6 |  |  | 10 |  |  |  |  |  |  | $ 5 |  |  | 9 |  |
SCB | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  | 0 |  |
SCB | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 11 | 150 |  |  |  |  |  |  |  |  | 10 | 148 |  |
SCB | Singapore dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  | $ 1 |  |  |  |  |  |  | 7 |  |  | $ 1 |  |  |  |  |  |  | 14 |  |
Bank Permata | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 335 |  |  |  |  |  |  |  |  |  | 218 |  |
Bank Permata | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 4 | 62 |  |  |  |  |  |  |  |  | 2 | 30 |  |
Bank Muamalat | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  | 40 |  |
Others | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 358 |  |  |  |  |  |  |  |  |  | 165 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 46 |  |  |  |  |  |  |  |  |  | 52 |  |
Others | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 8 | 113 |  |  |  |  |  |  |  |  | 8 | 115 |  |
Time deposits |  |  |  |  |  |  |  |  | 8 | 112 |  |  |  |  |  |  |  |  |  |  |  |
Others | Euro |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  | € 1 |  |  |  |  | 17 |  |  |  |  | € 1 |  |  |  |  | 20 |  |
Others | HKD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  | 0 |  |  | 0 |  |  |  |  |  |  | 0 |  |  | 0 |  |
Others | Australian dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  | $ 1 |  |  |  | 7 |  |  |  |  |  | $ 0 |  |  |  | 2 |  |
Others | Singapore dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  | 0 |  |  |  |  |  |  | 3 |  |  | 2 |  |  |  |  |  |  | 14 |  |
Others | Taiwanese new dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  | $ 27 |  |  |  |  |  |  |  | 13 |  | $ 17 |  |  |  |  |  |  |  | 8 |  |
Others | Malaysian ringgits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  | RM 4 |  | 12 |  |  |  |  |  |  |  | RM 6 |  | 21 |  |
Time deposits |  |  |  |  |  |  |  | RM 9 |  | 30 |  |  |  |  |  |  |  | RM 11 |  | 39 |  |
Others | Macau patacas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  | MOP$ 0 |  |  |  |  |  | 1 |  |  |  | MOP$ 0 |  |  |  |  |  | 0 |  |
Bank CIMB Niaga | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  | 992 |  |  |  |  |  |  |  |  |  | 190 |  |
Bank CIMB Niaga | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  | 29 | 398 |  |  |  |  |  |  |  |  |  |  |  |
Bank Mega | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  | 400 |  |  |  |  |  |  |  |  |  | 365 |  |
United Overseas Bank Limited ("UOB Singapore") | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 | 429 |  |
BTPN | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  | 181 |  |
BTPN | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25 | 363 |  |
Bank Bukopin | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 76 |  |  |  |  |  |  |  |  |  | 6 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  | 248 |  |
Bank Bukopin | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |  |  | 0 | 0 |  |
Related parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 3,106 |  |  |  |  |  |  |  |  |  | 3,338 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 11,735 |  |  |  |  |  |  |  |  |  | 11,206 |  |
Bank Mandiri | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 1,407 |  |  |  |  |  |  |  |  |  | 1,199 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 1,129 |  |  |  |  |  |  |  |  |  | 611 |  |
Bank Mandiri | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 9 | 122 |  |  |  |  |  |  |  |  | 10 | 139 |  |
Time deposits |  |  |  |  |  |  |  |  | 16 | 215 |  |  |  |  |  |  |  |  | 16 | 230 |  |
Bank Mandiri | Yen |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks | ¥ 1 |  |  |  |  |  |  |  |  | 0 | ¥ 8 |  |  |  |  |  |  |  |  | 1 |  |
Bank Mandiri | Euro |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  | 1 |  |  |  |  | 23 |  |  |  |  | 1 |  |  |  |  | 20 |  |
Bank Mandiri | HKD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  | $ 0 |  |  | 1 |  |  |  |  |  |  | $ 1 |  |  | 1 |  |
Bank Mandiri | Australian dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  | $ 0 |  |  |  | 0 |  |  |  |  |  | $ 0 |  |  |  | 0 |  |
BNI | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 1,033 |  |  |  |  |  |  |  |  |  | 791 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 2,693 |  |  |  |  |  |  |  |  |  | 2,640 |  |
BNI | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 6 | 86 |  |  |  |  |  |  |  |  | 2 | 28 |  |
Time deposits |  |  |  |  |  |  |  |  | 32 | 450 |  |  |  |  |  |  |  |  | 58 | 837 |  |
BNI | Euro |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  | € 0 |  |  |  |  | 0 |  |  |  |  | € 0 |  |  |  |  | 0 |  |
BNI | Singapore dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  | $ 0 |  |  |  |  |  |  | 0 |  |  | $ 0 |  |  |  |  |  |  | 0 |  |
BRI | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 198 |  |  |  |  |  |  |  |  |  | 728 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 2,561 |  |  |  |  |  |  |  |  |  | 1,911 |  |
BRI | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | 3 | 44 |  |  |  |  |  |  |  |  | 2 | 31 |  |
Time deposits |  |  |  |  |  |  |  |  | 36 | 500 |  |  |  |  |  |  |  |  | 47 | 676 |  |
BTN | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 51 |  |  |  |  |  |  |  |  |  | 342 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 2,733 |  |  |  |  |  |  |  |  |  | 2,559 |  |
BTN | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  | 4 | 49 |  |  |  |  |  |  |  |  | 31 | 446 |  |
BPD | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 121 |  |  |  |  |  |  |  |  |  | 43 |  |
BJB | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  |  |  |  |  |  |  |  | 1,394 |  |  |  |  |  |  |  |  |  | 1,295 |  |
Other related entities | Rupiah |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  | 15 |  |
Time deposits |  |  |  |  |  |  |  |  |  | 11 |  |  |  |  |  |  |  |  |  | 1 |  |
Other related entities | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CASH AND CASH EQUIVALENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash in banks |  |  |  |  |  |  |  |  | $ 0 | Rp 0 |  |  |  |  |  |  |  |  | $ 0 | Rp 0 |  |

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