XML 74 R43.htm IDEA: XBRL DOCUMENT
v3.19.1

Supplementary cash flow information (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Statement of cash flows [abstract] |
Disclosure Of Supplementary Cash Flow Information | Supplementary disclosure of cash flow information is provided in the table below: Non-cash (credits) charges:
|  | 2018 |  |  | 2017 |
|  | $ |  |  | $ |
Depreciation and depletion |  | 306,429 |  |  | 160,469 |
Delivery into prepaid sales (Note 13) |  | (60,000 | ) |  | (60,000 | )
Share-based payments (Note 12) |  | 21,693 |  |  | 18,127 |
Impairment of long-lived assets, net (Note 8) |  | 55,353 |  |  | — |
Gain on sale of Lynn Lake royalty (Note 8) |  | — |  |  | (6,593 | )
Write-down of mineral property interests (Note 8) |  | 9,398 |  |  | 4,150 |
Provision for non-recoverable input taxes |  | 1,646 |  |  | 2,180 |
Unrealized (gain) loss on fair value of convertible notes (Note 10) |  | (10,651 | ) |  | 11,144 |
Interest and financing expense |  | 28,589 |  |  | 9,728 |
Unrealized loss (gain) on derivative instruments (Note 14) |  | 4,757 |  |  | (9,684 | )
Write-down of long-term investments |  | — |  |  | 1,613 |
Deferred income tax expense (recovery) (Note 16) |  | 38,392 |  |  | (20,170 | )
Other |  | 657 |  |  | (1,146 | )
|  | 396,263 |  |  | 109,818 |
Changes in non-cash working capital:
|  | 2018 |  |  | 2017 |
|  | $ |  |  | $ |
Accounts receivable and prepaids |  | 3,345 |  |  | (6,768 | )
Value-added and other tax receivables |  | 4,272 |  |  | (4,441 | )
Inventories |  | (41,186 | ) |  | (58,059 | )
Accounts payable and accrued liabilities |  | 1,361 |  |  | 20,386 |
Current income and other taxes payable |  | 40,838 |  |  | 9,201 |
|  | 8,630 |  |  | (39,681 | )
Other exploration and development:
|  | 2018 |  |  | 2017 |
|  | $ |  |  | $ |
Fekola Mine, exploration |  | (14,246 | ) |  | (8,441 | )
Otjikoto Mine, exploration |  | (1,744 | ) |  | (1,220 | )
Masbate Mine, exploration |  | (4,941 | ) |  | (4,668 | )
Libertad Mine, exploration |  | (4,798 | ) |  | (6,751 | )
Limon Mine, exploration |  | (6,247 | ) |  | (6,362 | )
Toega Project, exploration |  | (8,688 | ) |  | (5,784 | )
Fekola Regional, exploration |  | (6,291 | ) |  | (6,245 | )
Ondundu Project, exploration |  | (3,027 | ) |  | (3,116 | )
Finland Properties, exploration |  | (2,479 | ) |  | (1,341 | )
Kiaka Project, exploration |  | (2,238 | ) |  | (4,512 | )
Other |  | (5,439 | ) |  | (5,233 | )
|  | (60,138 | ) |  | (53,673 | )
Non-cash investing and financing activities:
|  | 2018 |  |  | 2017 |
|  | $ |  |  | $ |
Non-controlling interest sold in exchange for loan receivable (Note 8) |  | 47,000 |  |  | — |
Interest on loan to non-controlling interest |  | 1,352 |  |  | — |
Share-based payments, capitalized to mineral property interests |  | 2,507 |  |  | 3,622 |
Change in current liabilities relating to mineral property expenditures |  | (14,277 | ) |  | (6,759 | )
Foreign exchange gain (loss) on Fekola equipment loan facility |  | 3,312 |  |  | (4,776 | )
Interest expense, capitalized to mineral property interests |  | — |  |  | 20,052 |
Common shares issued for purchase of non-controlling interest |  | — |  |  | (2,000 | )

X
- Definition Disclosure Of Supplementary Cash Flow Information [Table Text Block] + References No definition available. + Details
Name: | btg_DisclosureOfSupplementaryCashFlowInformationTableTextBlock
Namespace Prefix: | btg_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_StatementOfCashFlowsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration