XML 59 R11.htm IDEA: XBRL DOCUMENT
v3.8.0.1

CRITICAL JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS | 12 Months Ended
--- | ---
Dec. 31, 2017
Accounting Judgements and Estimates [Abstract] |
CRITICAL JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS | CRITICAL JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS Many of the amounts included in the consolidated balance sheet require management to make judgments and/or estimates. These judgments and estimates are continuously evaluated and are based on management’s experience and knowledge of the relevant facts and circumstances. Actual results may differ from the estimates. Information about such judgments and estimates is contained in the description of our accounting policies and/or other notes to the financial statements. The key areas where judgments, estimates and assumptions have been made are summarized below. Life of Mine (“LOM”) Plans and Reserves and Resources Estimates of the quantities of proven and probable mineral reserves and mineral resources form the basis for our LOM plans, which are used for a number of important business and accounting purposes, including: the calculation of depreciation expense; the capitalization of production phase stripping costs; and forecasting the timing of the payments related to the environmental rehabilitation provision. In addition, the underlying LOM plans are used in the impairment tests for goodwill and non-current assets. In certain cases, these LOM plans have made assumptions about our ability to obtain the necessary permits required to complete the planned activities. We estimate our ore reserves and mineral resources based on information compiled by qualified persons as defined in accordance with the Canadian Securities Administrators’ National Instrument 43-101 Standards of Disclosure for Mineral Projects requirements. To calculate our gold reserves, as at December 31, 2017 we have used a per ounce gold price of $1,200, compared to $1,000 short-term and $1,200 long-term as at December 31, 2016. To calculate our measured, indicated, and inferred gold resources, as at December 31, 2017 we have used a gold price assumption of $1,500 per ounce, consistent with the prior year. Refer to notes 19 and 21. Inventory The measurement of inventory including the determination of its net realizable value, especially as it relates to ore in stockpiles, involves the use of estimates. Estimation is required in determining the tonnage, recoverable gold and copper contained therein, and in determining the remaining costs of completion to bring inventory into its saleable form. Judgment also exists in determining whether to recognize a provision for obsolescence on mine operating supplies, and estimates are required to determine salvage or scrap value of supplies. Estimates of recoverable gold or copper on the leach pads are calculated from the quantities of ore placed on the leach pads (measured tons added to the leach pads), the grade of ore placed on the leach pads (based on assay data) and a recovery percentage (based on ore type). Impairment and Reversal of Impairment for Non-Current Assets and Impairment of Goodwill Goodwill and non-current assets are tested for impairment if there is an indicator of impairment or reversal of impairment, and in the case of goodwill annually during the fourth quarter, for all of our operating segments. We consider both external and internal sources of information for indications that non-current assets and/or goodwill are impaired. External sources of information we consider include changes in the market, economic and legal environment in which the CGU operates that are not within its control and affect the recoverable amount of mining interests and goodwill. Internal sources of information we consider include the manner in which mining properties and plant and equipment are being used or are expected to be used and indications of economic performance of the assets. Calculating the FVLCD of CGUs for non-current asset and goodwill impairment tests requires management to make estimates and assumptions with respect to future production levels, operating, capital and closure costs in our LOM plans, future metal prices, foreign exchange rates, Net Asset Value (“NAV”) multiples, value of reserves outside LOM plans in relation to the assumptions related to comparable entities and the market values per ounce and per pound and discount rates. Changes in any of the assumptions or estimates used in determining the fair values could impact the impairment analysis. Refer to notes 2o, 2q and 21 for further information. Provisions for Environmental Rehabilitation Management assesses its provision for environmental rehabilitation on an annual basis or when new information becomes available. This assessment includes the estimation of the future rehabilitation costs, the timing of these expenditures, and the impact of changes in discount rates and foreign exchange rates. The actual future expenditures may differ from the amounts currently provided if the estimates made are significantly different than actual results or if there are significant changes in environmental and/or regulatory requirements in the future. Refer to notes 2u and 27 for further information. Taxes Management is required to make estimations regarding the tax basis of assets and liabilities and related deferred income tax assets and liabilities, amounts recorded for uncertain tax positions, the measurement of income tax expense and indirect taxes, and estimates of the timing of repatriation of earnings, which would impact the recognition of withholding taxes and taxes related to the outside basis on subsidiaries/associates. A number of these estimates require management to make estimates of future taxable profit, as well as the recoverability of indirect taxes, and if actual results are significantly different than our estimates, the ability to realize the deferred tax assets and indirect tax receivables recorded on our balance sheet could be impacted. Refer to notes 2j, 12 and 30 for further information. Contingencies Contingencies can be either possible assets or possible liabilities arising from past events which, by their nature, will only be resolved when one or more future events not wholly within our control occur or fail to occur. The assessment of such contingencies inherently involves the exercise of significant judgment and estimates of the outcome of future events. In assessing loss contingencies related to legal proceedings that are pending against us or unasserted claims that may result in such proceedings or regulatory or government actions that may negatively impact our business or operations, the Company with assistance from its legal counsel evaluates the perceived merits of any legal proceedings or unasserted claims or actions as well as the perceived merits of the nature and amount of relief sought or expected to be sought, when determining the amount, if any, to recognize as a contingent liability or assessing the impact on the carrying value of assets. Contingent assets are not recognized in the consolidated financial statements. Refer to note 36 for more information. Pascua-Lama The Pascua-Lama project received $484 million as at December 31, 2017 ($429 million as at December 31, 2016) in value added tax (“VAT”) refunds in Chile relating to the development of the Chilean side of the project. Under the current arrangement this amount plus interest of $313 million (2016: $236 million) must be repaid if the project does not evidence exports for an amount of $3,538 million within a term that expires on December 31, 2026. The terms of the current VAT arrangement in Chile are applicable to either an open pit or an underground mine design. We have recorded $221 million in VAT recoverable in Argentina as at December 31, 2017 ($255 million as at December 31, 2016) relating to the development of the Argentinean side of the project. These amounts may not be recoverable if the project does not enter into production and are subject to devaluation risk as the amounts are recoverable in Argentinean pesos. Streaming Transactions The upfront cash deposit received from Royal Gold on the gold and silver streaming transaction for production linked to Barrick’s 60% interest in the Pueblo Viejo mine has been accounted for as deferred revenue as we have determined that it is not a derivative as it will be satisfied through the delivery of non-financial items (i.e., gold and silver) rather than cash or financial assets. It is our intention to settle the obligations under the streaming arrangement through our own production and if we were to fail to settle the obligations with Royal Gold through our own production, this would lead to the streaming arrangement becoming a derivative. This would cause a change to the accounting treatment, resulting in the revaluation of the fair value of the agreement through profit and loss on a recurring basis. Refer to note 29 for further details. Our silver sale agreement with Wheaton Precious Metals Corp. (“Wheaton”) (formerly Silver Wheaton Corp.) requires us to deliver 25% of the life of mine silver production from the Pascua-Lama project once it is constructed and 100% of silver from Lagunas Norte, Pierina and Veladero mines until March 31, 2018. The completion date for Pascua-Lama was originally December 31, 2015 but was subsequently extended to June 30, 2020. Per the terms of the amended silver purchase agreement, if the requirements of the completion guarantee have not been satisfied by June 30, 2020, the agreement may be terminated by Wheaton, in which case, they will be entitled to the return of the upfront cash consideration paid less credit for silver delivered up to the date of that event. The cash liability at December 31, 2017 is $262 million. Refer to note 28 for a summary of our key financial risks. Other Notes to the Financial Statements
| Note
Acquisitions and Divestitures | 4 |
Segment information | 5 |
Revenue | 6 |
Cost of sales | 7 |
Exploration, evaluation and project expenses | 8 |
Other expense (income) | 9 |
Impairment reversals | 10 |
General and administrative expenses | 11 |
Income tax expense | 12 |
Earnings per share | 13 |
Finance costs, net | 14 |
Cash flow - other items | 15 |
Investments | 16 |
Inventories | 17 |
Accounts receivable and other current assets | 18 |
Property, plant and equipment | 19 |
Goodwill and other intangible assets | 20 |
Impairment and reversal of non-current assets | 21 |
Other assets | 22 |
Accounts payable | 23 |
Other current liabilities | 24 |
Financial instruments | 25 |
Fair value measurements | 26 |
Provisions | 27 |
Financial risk management | 28 |
Other non-current liabilities | 29 |
Deferred income taxes | 30 |
Capital stock | 31 |
Non-controlling interests | 32 |
Remuneration of key management personnel | 33 |
Stock-based compensation | 34 |
Post-retirement benefits | 35 |
Contingencies | 36 |

X
- Definition Accounting Judgements and Estimates [Abstract] + References No definition available. + Details
Name: | abx_AccountingJudgementsandEstimatesAbstract
Namespace Prefix: | abx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of judgements that management has made in the process of applying the entity's accounting policies that have the most significant effect on amounts recognised in the financial statements along with information about the assumptions that the entity makes about the future, and other major sources of estimation uncertainty at the end of the reporting period, that have a significant risk of resulting in a material adjustment to the carrying amounts of assets and liabilities within the next year. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfAccountingJudgementsAndEstimatesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration