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LONG-TERM LOANS AND OTHER BORROWINGS - Two-step loans (Details) ¥ in Millions, $ in Millions, Rp in Billions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 JPY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 IDR (Rp) | Dec. 31, 2018 JPY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 IDR (Rp)
Borrowings and other credit facilities |  |  |  |  |  |
Current maturities |  |  | Rp (13,409) |  |  | Rp (6,296)
Long-term portion |  | $ 3,230 | 44,843 |  |  | 33,743
Two-step loans |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |
Total loans and other borrowings |  |  | 736 |  |  | 949
Current maturities |  |  | (194) |  |  | (198)
Long-term portion |  |  | 542 |  |  | 751
Projected net revenue to projected debt service ratio | 1.2 |  |  |  |  |
Internal financing exceeding annual average capital expenditure | 20.00% |  |  |  |  |
Yen | Two-step loans |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |
Total loans and other borrowings | ¥ 3,839 |  | Rp 491 | ¥ 4,607 |  | 602
Interest rate (as a percent) | 2.95% | 2.95% | 2.95% |  |  |
USD | Two-step loans |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |
Total loans and other borrowings |  | $ 9 | Rp 120 |  | $ 13 | 188
Interest rate (as a percent) | 3.85% | 3.85% | 3.85% |  |  |
Rupiah | Two-step loans |  |  |  |  |  |
Borrowings and other credit facilities |  |  |  |  |  |
Total loans and other borrowings |  |  | Rp 125 |  |  | Rp 159
Interest rate (as a percent) | 8.38% | 8.38% | 8.38% |  |  |

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