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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Principles of consolidation (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Puren |  |
Principles of consolidation |  |
Ownership interest in joint venture | 65.00% | 65.00%
Fairbanks Gold Mining, Inc. |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
KBM |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
CMM |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
MDO |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
Echo Bay Minerals Company |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
Chukotka Mining and Geological Company |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
Northern Gold LLC |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
Tasiast Mauritanie Ltd. S.A. |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
Chirano Gold Mines Ltd. |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 90.00% | 90.00%
Chirano Gold Mines Ltd. | Ghana |  |
Principles of consolidation |  |
Ownership interest non controlling interest | 10.00% | 10.00%
KGBM |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%
Round Mountain Gold Corporation/KG Mining (Round Mountain) Inc. |  |
Principles of consolidation |  |
Ownership interest in subsidiary | 100.00% | 100.00%

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