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Recent accounting pronouncements | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Significant Accounting Policies [Abstract] |
Recent accounting pronouncements | Recent accounting pronouncements Accounting standards and amendments adopted IFRS 15 – Revenue from contracts with customers IFRS 15, Revenue from Contracts with Customers, was adopted on January 1, 2018. The standard introduces a single, principles-based, five-step model for the recognition of revenue when control of goods is transferred to the customer. The five steps are: identify the contract(s) with the customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to each performance obligation and recognize revenue as each performance obligation is satisfied. IFRS 15 also requires enhanced disclosures about revenue to help users better understand the nature, amount, timing and uncertainty of revenue and cash flows from contracts with customers. The Company evaluated the effect the standard had on its sales recorded in its consolidated financial statements and determined there is no impact to the timing or amounts of revenue recognized in its statement of operations. IFRS 9 – Financial Instruments The final version of IFRS 9, Financial Instruments, was issued in July 2014 to replace IAS 39, Financial Instruments: Recognition and Measurement. IFRS 9 has two measurement categories for financial assets: amortized cost and fair value. Classification is determined at initial recognition in one of the following categories: fair value through profit and loss (“FVTPL”), fair value through other comprehensive income (“FVOCI”) or at amortized cost. In addition, the standard amended some of the requirements of IFRS 7, Financial Instruments: Disclosures, including the requirement for added disclosures about investments in equity instruments measured at FVOCI and guidance on financial liabilities and derecognition of financial instruments. The Company adopted the standard on January 1, 2018. Retrospective application was required, but there was no requirement to restate comparative periods disclosed. The Company has assessed the classification and measurement of its financial assets and financial liabilities under IFRS 9 and have summarized the original measurement categories under IAS 39 and the new measurement categories under IFRS 9 in the following table:
| Measurement Categories
|  | IAS 39 |  | IFRS 9
Financial instruments: |  |  |  |
Cash and cash equivalents |  | Amortized cost |  | Amortized cost
Debt service reserve account |  | Amortized cost |  | Amortized cost
Loans receivable |  | Amortized cost |  | Amortized cost
Long-term investments |  | FVTPL & FVOCI |  | FVOCI
Derivative financial instruments |  | FVTPL |  | FVTPL
Accounts payable and accrued liabilities |  | Amortized cost |  | Amortized cost
Convertible senior subordinated notes |  | FVTPL |  | FVTPL FVOCI for change in credit risk
Debt |  | Amortized cost |  | Amortized cost
Lease liabilities |  | Amortized cost |  | Amortized cost
The Company has elected to irrevocably designate its long-term investments held at the transition date as FVOCI as they are not considered to be held for trading. The Company applied the modified retrospective approach for the adoption of IFRS 9, whereby prior periods were not restated for the impact of the standard. As a result, a decrease in deficit of $46 million with a corresponding adjustment to accumulated other comprehensive loss ("AOCI") was recognized on January 1, 2018 consisting of:
• | Long-term investments (Note 7): reclassification of a $35 million loss (net of a $1 million deferred income tax recovery) from deficit to accumulated other comprehensive loss.
• | Convertible senior subordinated notes (Note 10): reclassification of an $11 million loss from deficit to AOCI.
Previously, under IAS 39, long-term investments were measured at fair value on acquisition and at each reporting date. Any unrealized holding gains and losses related to these investments were excluded from net income and included in other comprehensive income ("OCI") until the investment was sold or there was objective evidence that the investment was impaired. When there was evidence that an investment was impaired, the cumulative loss previously recognized in OCI was reclassified from AOCI to the consolidated statement of operations. For financial assets under IAS 39, the Company was required to assess whether there was objective evidence that the asset was impaired at each reporting date. If such evidence existed, the Company recognized an impairment loss equal to the difference between the amortized cost of the financial asset and the present value of the estimated future cash flows, discounted using the instrument’s original effective interest rate. The carrying amount of the asset was reduced by this amount either directly or indirectly through the use of an allowance account. Impairment losses on financial assets carried at amortized cost are reversed in subsequent periods if the amount of the loss decreases and the decrease can be related objectively to an event occurring after the impairment was recognized. The Company's approach to impairment of financial assets under IFRS 9, is outlined in Note 4. Accounting standards and amendments issued but not yet adopted IFRS 16 – Leases The IASB has issued IFRS 16, Leases, which is effective for annual periods commencing on or after January 1, 2019. This new standard eliminates the classification of leases as either operating leases or finance leases and introduces a single lessee accounting model which requires the lessee to recognize assets and liabilities for all leases with a term of longer than 12 months, with the exception of low-value assets. This requirement to record leases as finance leases is expected to increase lease assets and lease liabilities on the Company's consolidated balance sheet. IFRS 16 will also result in the lease expense previously recognized for operating leases being replaced with depreciation expense for lease assets and interest and financing expense for lease liabilities. On the transition date of January 1, 2019, the Company expects to recognize additional leases on the consolidated balance sheet, which will increase both short and long-term liabilities and mining interest balances. As a result of recognizing additional lease obligations, it is expected that there will be a reduction in production costs, as lease expense will be removed. Depreciation expense and interest and financing expense are expected to increase as a result of the recognition of additional lease assets and the associated lease obligations. The Company is in the process of finalizing the quantification of the impact. In 2017, the Company completed an initial scoping of its existing lease and service contracts and is finalizing this scoping. During 2018, a working group was formed, the assessment of the contracts began and was substantially completed, initial calculations were prepared for the contracts determined to contain leases for all locations and the design of controls for the identification of leases in service contracts was completed. In addition, during the fourth quarter of 2018, completeness tests were performed to validate the population of contracts in scope for IFRS 16. The Company intends to use the modified retrospective approach of adoption resulting in no restatement of prior year comparatives. The quantitative impact of adopting IFRS 16 will be reported in the first quarter of 2019.

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- Definition Disclosure Of Significant Accounting Policies [Abstract] + References No definition available. + Details
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- Definition The disclosure of the known or reasonably estimable information relevant to assessing the possible impact that the application of a new IFRS, that has been issued but is not yet effective, will have. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 8 -IssueDate 2017-01-01 -Paragraph 30 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=8&date=2017-03-01&anchor=para_30_b&doctype=Standard -URIDate 2017-03-09 + Details
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