| In millions, except per share items | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 |
| | 20-F | 20-F | 20-F | 20-F |
| Statement Table [Table] | | | | |
| Statement Line Items [Line Items] | | | | |
| Current assets: | | | | |
| Cash and cash equivalents (Note 12) | | | | |
| Gold in trust (Note 8) | | | | |
| Accounts receivable and prepaid expenses (Note 4) | | | | |
| Total current assets | | | | |
| Non-current assets: | | | | |
| Right-of-use assets (Note 5) | | | | |
| |
| Exploration and evaluation assets (Note 7) | | | | |
| Total non-current assets | | | | |
| TOTAL ASSETS | | | | |
| Current liabilities: | | | | |
| Trade and other payables (Note 10 (a)(c)) | | | | |
| Current portion of lease liabilities (Note 5) | | | | |
| Total current liabilities | | | | |
| Non-current liabilities: | | | | |
| Long-term portion of lease liabilities (Note 5) | | | | |
| |
| Derivative financial liabilities (Note 8) | | | | |
| Deferred income tax liability (Note 13) | | | | |
| Total non-current liabilities | | | | |
| Total liabilities | | | | |
| EQUITY | | | | |
| Share capital (Note 9) | | | | |
| Reserves (Note 9) | | | | |
| Deficit | | | | |
| Total equity | | | | |
| TOTAL EQUITY AND LIABILITIES | | | | |