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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Financial instruments (Details) $ in Millions, Rp in Billions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) item | Dec. 31, 2019 IDR (Rp) item | Dec. 31, 2018 IDR (Rp) | Dec. 31, 2017 IDR (Rp) | Dec. 31, 2019 IDR (Rp) | Jan. 01, 2019 IDR (Rp)
Disclosure of initial application of standards or interpretations [line items] |  |  |  |  |  |
Number of stages for recognition of expected credit losses | item | 2 | 2 |  |  |  |
Period to trigger provision | 12 months | 12 months |  |  |  |
Past due period for significant increased risk | 30 days | 30 days |  |  |  |
Period to measure expected credit losses | 12 months | 12 months |  |  |  |
Past due period for default | 90 days | 90 days |  |  |  |
ASSETS |  |  |  |  |  |
Other current assets | $ 396 |  | Rp 7,280 |  | Rp 5,502 |
Property and equipment | 11,034 |  | 142,912 | Rp 129,872 | 153,174 |
Right-of-use assets | 1,505 |  |  |  | 20,893 | Rp 23,296
Deferred tax assets - net | 200 |  | 2,477 |  | 2,779 |
Other non-current assets. | 554 |  | 9,654 |  | 7,683 |
Assets | 16,931 |  | 205,900 |  | 235,057 |
LIABILITIES |  |  |  |  |  |
Accrued expenses | 919 |  | 12,769 |  | 12,761 |
Short-term loans and current maturities of long-term borrowings | 1,593 |  | 10,339 |  | 22,114 |
Deferred tax liabilities - net | 87 |  | 1,197 |  | 1,204 |
Long-term loans and other borrowings | 3,230 |  | 33,743 |  | 44,843 |
Liabilities | 8,488 |  | 88,894 |  | 117,833 |
CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME |  |  |  |  |  |
Operation, maintenance and telecommunication service expenses | (2,698) | Rp (37,453) | (43,893) | (36,603) |  |
Depreciation and amortization | (1,960) | (27,204) | (21,442) | (20,477) |  |
Finance costs | (393) | (5,452) | (3,523) | (2,769) |  |
Profit before income tax | 2,759 | 38,299 | 36,077 | 42,628 |  |
Income tax expense – net | (752) | (10,439) | (9,366) | (9,958) |  |
Profit for the year | 2,007 | 27,860 | 26,711 | 32,670 |  |
Profit for the year attributable to: |  |  |  |  |  |
Owners of the parent company | 1,374 | 19,068 | 17,802 | 22,120 |  |
Non-controlling interests | 633 | 8,792 | Rp 8,909 | Rp 10,550 |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |
Operating lease payments | 386 | 5,359 |  |  |  |
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |
Payment of principal portion of lease liabilities | $ 340 | 4,735 |  |  |  |
IFRS 16 |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Other current assets |  |  |  |  | 5,502 |
Property and equipment |  |  |  |  | 153,174 |
Right-of-use assets |  |  |  |  | 20,893 |
Deferred tax assets - net |  |  |  |  | 2,779 |
Other non-current assets. |  |  |  |  | 7,683 |
Assets |  |  |  |  | 190,031 |
LIABILITIES |  |  |  |  |  |
Accrued expenses |  |  |  |  | 12,761 |
Short-term loans and current maturities of long-term borrowings |  |  |  |  | 22,114 |
Deferred tax liabilities - net |  |  |  |  | 1,204 |
Long-term loans and other borrowings |  |  |  |  | 44,843 |
Liabilities |  |  |  |  | 80,922 |
CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME |  |  |  |  |  |
Operation, maintenance and telecommunication service expenses |  | (37,453) |  |  |  |
Depreciation and amortization |  | (27,204) |  |  |  |
Finance costs |  | (5,452) |  |  |  |
Profit before income tax |  | (70,109) |  |  |  |
Income tax expense – net |  | (10,439) |  |  |  |
Profit for the year |  | (80,548) |  |  |  |
Profit for the year attributable to: |  |  |  |  |  |
Owners of the parent company |  | 19,068 |  |  |  |
Non-controlling interests |  | 8,792 |  |  |  |
Previously stated |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Other current assets |  |  |  |  | 8,114 |
Property and equipment |  |  |  |  | 156,603 |
Deferred tax assets - net |  |  |  |  | 2,663 |
Other non-current assets. |  |  |  |  | 9,106 |
Assets |  |  |  |  | 176,486 |
LIABILITIES |  |  |  |  |  |
Accrued expenses |  |  |  |  | 13,723 |
Short-term loans and current maturities of long-term borrowings |  |  |  |  | 18,215 |
Deferred tax liabilities - net |  |  |  |  | 1,155 |
Long-term loans and other borrowings |  |  |  |  | 33,865 |
Liabilities |  |  |  |  | 66,958 |
CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME |  |  |  |  |  |
Operation, maintenance and telecommunication service expenses |  | (42,246) |  |  |  |
Depreciation and amortization |  | (23,211) |  |  |  |
Finance costs |  | (4,268) |  |  |  |
Profit before income tax |  | (69,725) |  |  |  |
Income tax expense – net |  | (10,506) |  |  |  |
Profit for the year |  | (80,231) |  |  |  |
Profit for the year attributable to: |  |  |  |  |  |
Owners of the parent company |  | 19,285 |  |  |  |
Non-controlling interests |  | 8,892 |  |  |  |
Increase (decrease) |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Other current assets |  |  |  |  | (2,612) |
Property and equipment |  |  |  |  | (3,429) |
Right-of-use assets |  |  |  |  | 20,893 |
Deferred tax assets - net |  |  |  |  | 116 |
Other non-current assets. |  |  |  |  | (1,423) |
Assets |  |  |  |  | 13,545 |
LIABILITIES |  |  |  |  |  |
Accrued expenses |  |  |  |  | (962) |
Short-term loans and current maturities of long-term borrowings |  |  |  |  | 3,899 |
Deferred tax liabilities - net |  |  |  |  | 49 |
Long-term loans and other borrowings |  |  |  |  | 10,978 |
Liabilities |  |  |  |  | Rp 13,964 |
CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME |  |  |  |  |  |
Operation, maintenance and telecommunication service expenses |  | 4,793 |  |  |  |
Depreciation and amortization |  | (3,993) |  |  |  |
Finance costs |  | (1,184) |  |  |  |
Profit before income tax |  | (384) |  |  |  |
Income tax expense – net |  | 67 |  |  |  |
Profit for the year |  | (317) |  |  |  |
Profit for the year attributable to: |  |  |  |  |  |
Owners of the parent company |  | (217) |  |  |  |
Non-controlling interests |  | (100) |  |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |  |  |  |
Operating lease payments |  | 5,359 |  |  |  |
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |  |  |  |
Payment of principal portion of lease liabilities |  | Rp 4,735 |  |  |  |

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