IAMGOLD CORP, 40-F filed on 2/20/2019
Annual Report (foreign private issuer)
v3.10.0.1
Document and Entity Information
12 Months Ended
Dec. 31, 2018
shares
Document and Entity Information [Abstract]  
Entity Registrant Name IAMGOLD CORP
Entity Central Index Key 0001203464
Document Type 40-F
Amendment Flag false
Document Period End Date Dec. 31, 2018
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2018
Document Fiscal Period Focus FY
Entity Current Reporting Status Yes
Entity Common Stock, Shares Outstanding 466,830,457
v3.10.0.1
CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Current assets    
Cash and cash equivalents $ 615.1 $ 664.1
Short-term investments 119.0 127.2
Consideration receivable 0.0 93.8
Receivables and other current assets 78.1 75.9
Inventories 274.7 200.0
Current assets 1,086.9 1,161.0
Non-current assets    
Investments in associates and incorporated joint ventures 76.8 69.0
Property, plant and equipment 2,436.1 1,940.2
Exploration and evaluation assets 47.3 474.6
Income taxes receivable 8.6 17.3
Restricted cash 23.9 24.5
Inventories 202.9 177.6
Other assets 78.5 102.7
Non-current assets 2,874.1 2,805.9
Assets 3,961.0 3,966.9
Current liabilities    
Accounts payable and accrued liabilities 196.0 196.2
Income taxes payable 15.4 14.9
Current portion of provisions 9.0 17.1
Other liabilities 6.8 2.9
Current liabilities 227.2 231.1
Non-current liabilities    
Deferred income tax liabilities 188.2 198.2
Provisions 341.4 299.0
Long-term debt 398.5 391.6
Other liabilities 13.1 0.2
Non-current liabilities 941.2 889.0
Liabilities 1,168.4 1,120.1
Equity    
Common shares 2,680.1 2,677.8
Contributed surplus 48.2 43.0
Retained earnings 63.1 91.3
Accumulated other comprehensive loss (58.8) (20.5)
Equity attributable to IAMGOLD Corporation shareholders 2,732.6 2,791.6
Non-controlling interests 60.0 55.2
Equity 2,792.6 2,846.8
Contingencies and commitments
Equity and liabilities $ 3,961.0 $ 3,966.9
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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Profit or loss [abstract]    
Revenues $ 1,111.0 $ 1,094.9
Cost of sales 974.1 942.0
Gross profit 136.9 152.9
General and administrative expenses (42.1) (40.3)
Exploration expenses (39.2) (38.4)
Reversal of impairment charges 0.0 524.1
Other expenses (21.5) (18.3)
Earnings from operations 34.1 580.0
Share of net earnings from investments in associates and incorporated joint ventures, net of income taxes 12.6 15.0
Finance costs (8.8) (10.9)
Foreign exchange gain (loss) (13.6) 7.3
Interest income, derivatives and other investment gains (losses) (6.0) 16.7
Earnings before income taxes 18.3 608.1
Income taxes (38.0) (97.6)
Net earnings (loss) (19.7) 510.5
Net earnings (loss) attributable to    
Equity holders of IAMGOLD Corporation (28.2) 501.6
Non-controlling interests 8.5 8.9
Net earnings (loss) $ (19.7) $ 510.5
Weighted average number of common shares outstanding    
Basic (in shares) 466.5 463.0
Diluted (in shares) 466.5 467.5
Earnings (loss) per share    
Basic (in dollars per share) $ (0.06) $ 1.08
Diluted (in dollars per share) $ (0.06) $ 1.07
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Statement of comprehensive income [abstract]    
Net earnings (loss) $ (19.7) $ 510.5
Movement in marketable securities fair value reserve    
Net unrealized change in fair value of marketable securities (10.8) 17.9
Net realized change in fair value of marketable securities (0.4) (10.9)
Tax impact 1.8 (0.6)
Other comprehensive income (loss), net of income tax (9.4) 6.4
Movement in cash flow hedge fair value reserve    
Effective portion of changes in fair value of cash flow hedges (1.1) 16.5
Time value of options contracts excluded from hedge relationship (15.8) (1.9)
Net change in fair value of cash flow hedges reclassified to the statements of earnings (10.9) (4.0)
Tax impact 1.2 (0.3)
Other comprehensive income, net of income taxes (26.6) 10.3
Currency translation adjustment (1.2) 0.8
Total other comprehensive income (loss) (37.2) 17.5
Comprehensive income (loss) (56.9) 528.0
Comprehensive income (loss) attributable to:    
Equity holders of IAMGOLD Corporation (65.4) 519.1
Non-controlling interests 8.5 8.9
Comprehensive income (loss) $ (56.9) $ 528.0
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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Millions
Total
Equity attributable to equity holders of IAMGOLD Corporation
Common shares
Contributed surplus
Retained earnings
Accumulated other comprehensive loss
Marketable securities fair value reserve
Cash flow hedge fair value reserve
Currency translation adjustment
Non-controlling interests
Equity at Dec. 31, 2016     $ 2,628.2 $ 40.1 $ (409.7)   $ (29.0) $ (3.8) $ (4.1) $ 49.4
Issuance of common shares     33.3              
Issuance of flow-through common shares     13.4              
Issuance of common shares for share-based compensation     2.9 (2.9)            
Share-based compensation       5.9            
Other       (0.1) (0.6)          
Net earnings (loss) attributable to equity holders of IAMGOLD Corporation $ 510.5       501.6         8.9
Net change in fair value of marketable securities and cash flow hedges recognized in other comprehensive income net of income taxes 17.5           6.4 10.3 0.8  
Net change in fair value of cash flow hedges recognized in property, plant and equipment               (1.1)    
Dividends to non-controlling interests                   (3.1)
Equity at Dec. 31, 2017 2,846.8 $ 2,791.6 2,677.8 43.0 91.3 $ (20.5) (22.6) 5.4 (3.3) 55.2
Issuance of common shares     0.0              
Issuance of flow-through common shares     0.0              
Issuance of common shares for share-based compensation     2.3 (2.3)            
Share-based compensation       8.4            
Other       (0.9) 0.0          
Net earnings (loss) attributable to equity holders of IAMGOLD Corporation (19.7)       (28.2)         8.5
Net change in fair value of marketable securities and cash flow hedges recognized in other comprehensive income net of income taxes (37.2)           (9.4) (26.6) (1.2)  
Net change in fair value of cash flow hedges recognized in property, plant and equipment               (1.1)    
Dividends to non-controlling interests                   (3.7)
Equity at Dec. 31, 2018 $ 2,792.6 $ 2,732.6 $ 2,680.1 $ 48.2 $ 63.1 $ (58.8) $ (32.0) $ (22.3) $ (4.5) $ 60.0
v3.10.0.1
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Operating activities    
Net earnings (loss) $ (19.7) $ 510.5
Adjustments for:    
Finance costs 8.8 10.9
Depreciation expense 266.2 266.0
Derivative gain (1.8) (6.9)
Income taxes 38.0 97.6
Interest income (13.3) (9.4)
Reversal of impairment charges 0.0 (524.1)
Gain on sale of a 30% interest in the Côté Gold Project 0.0 (19.2)
Share of net earnings from investments in associates and incorporated joint ventures, net of income taxes (12.6) (15.0)
Write-down of inventories 4.9 14.2
Loss on redemption of 6.75% Senior Notes 0.0 20.2
Write-down of related party loan receivable 10.9 0.0
Write-down of assets 9.2 2.5
Effects of exchange rate fluctuation on short-term investments 5.2 0.0
Effects of exchange rate fluctuation on cash and cash equivalents 4.7 (11.4)
Other non-cash items 18.7 9.6
Adjustments for cash items:    
Dividends from Sadiola 2.1 2.1
Settlement of derivatives 10.9 1.4
Disbursements related to asset retirement obligations (4.9) (5.0)
Movements in non-cash working capital items and non-current ore stockpiles (97.3) 1.3
Cash from operating activities, before income taxes paid 230.0 345.3
Income taxes paid (38.9) (50.0)
Net cash from operating activities 191.1 295.3
Investing activities    
Capital expenditures for property, plant and equipment (257.2) (197.0)
Capitalized borrowing costs (28.1) (24.1)
Capital expenditures for exploration and evaluation assets (42.5) (13.4)
Net proceeds from sale of a 30% interest in the Côté Gold Project 92.1 96.5
Decrease in restricted cash 1.1 88.1
Acquisition of Saramacca exploration and evaluation asset (8.2) (5.0)
Interest received 12.6 7.7
Disposal of short-term investments 4.8  
(Purchase) of short-term investments   (127.2)
Purchase of additional common shares of associate 0.0 (7.4)
Other investing activities 0.5 4.4
Net cash used in investing activities (224.9) (177.4)
Financing activities    
Interest paid (0.3) (8.6)
Payment of finance lease obligations (1.2) (0.1)
Dividends paid to non-controlling interests (3.7) (3.1)
Redemption of 6.75% Senior Notes 0.0 (505.6)
Net proceeds from issuance of 7% Senior Notes 0.0 393.6
Long-term prepayment for finance lease 0.0 (4.9)
Proceeds from issuance of flow-through shares 0.0 15.1
Other financing activities (5.3) (3.6)
Net cash used in financing activities (10.5) (117.2)
Effects of exchange rate fluctuation on cash and cash equivalents (4.7) 11.4
Increase (decrease) in cash and cash equivalents (49.0) 12.1
Cash and cash equivalents, beginning of the year 664.1 652.0
Cash and cash equivalents, end of the year $ 615.1 $ 664.1
v3.10.0.1
CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)
12 Months Ended
Jun. 20, 2017
May 08, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 16, 2017
Sep. 21, 2012
Fixed interest rate | Senior Notes at 6.75%            
Investment [Line Items]            
Interest rate         6.75% 6.75%
Fixed interest rate | 7.0% Senior Notes            
Investment [Line Items]            
Interest rate     7.00%   7.00%  
Disposal Of Interest In Cote Gold Project            
Investment [Line Items]            
Proportion of ownership interest sold in joint venture 30.00% 30.00% 30.00% 30.00%    
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CORPORATE INFORMATION
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
CORPORATE INFORMATION
CORPORATE INFORMATION
IAMGOLD Corporation (“IAMGOLD” or “the Company”) is a corporation governed by the Canada Business Corporations Act and domiciled in Canada whose shares are publicly traded. The address of the Company’s registered office is 401 Bay Street, Suite 3200, Toronto, Ontario, Canada, M5H 2Y4.
The principal activities of the Company are the exploration, development and operation of gold mining properties.
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BASIS OF PREPARATION
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
BASIS OF PREPARATION
BASIS OF PREPARATION
(a)    Statement of compliance
These consolidated financial statements of IAMGOLD and all of its subsidiaries, joint ventures and associates as at and for the years ended December 31, 2018 and 2017, have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board ("IASB").
These consolidated financial statements were prepared on a going concern basis. The significant accounting policies applied in these consolidated financial statements are presented in note 4 and have been consistently applied in each of the years presented, except for the new accounting standards presented in note 3.
These consolidated financial statements of IAMGOLD were authorized for issue in accordance with a resolution of the Board of Directors on February 20, 2019.
(b)
Basis of measurement
The consolidated financial statements have been prepared on a historical cost basis, except for items measured at fair value as discussed in note 22.
(c)    Basis of consolidation
Subsidiaries, divisions and investments in joint ventures related to significant properties of the Company are accounted for as outlined below.
Name
Property
– Location
December 31,
2018
December 31,
2017
Type of
Arrangement
Accounting 
Method
Essakane S.A.
Essakane mine (Burkina Faso)
90%
90%
Subsidiary
Consolidation
Rosebel Gold Mines N.V.
Rosebel mine (Suriname)
95%
95%
Subsidiary
Consolidation
Doyon division including the Westwood mine
Doyon division (Canada)
100%
100%
Division
Consolidation
Côté Gold division 1
Côté Gold Project
(Canada)
70%
70%
Division
Proportionate share
Euro Ressources S.A.
France
90%
90%
Subsidiary
Consolidation
Société d'Exploitation des Mines d'Or de Sadiola S.A.
Sadiola mine
(Mali)
41%
41%
Incorporated joint venture
Equity accounting
Merrex Gold Inc.2
Diakha-Siribaya Gold Project (Mali)
100%
100%
Subsidiary
Consolidation
1 Effective June 20, 2017, the Company holds an undivided interest in the assets, liabilities, revenues and expenses of the Côté Gold division through an
unincorporated joint venture (note 10).
2 On February 28, 2017, the Company increased its ownership in Merrex from 23% to 100% (note 6).
(i) Subsidiaries
Subsidiaries are entities over which the Company has the ability to exercise control. Control of an entity is defined to exist when the Company is exposed to variable returns from involvement with the entity and has the ability to affect those returns through power over the entity. Specifically, the Company controls an entity if the Company has all of the following: power over the entity (i.e. existing rights that give the Company the current ability to direct the relevant activities of the entity); exposure, or rights, to variable returns from involvement with the entity; and the ability to use power over the entity to affect its returns. Subsidiaries are consolidated from the acquisition date, which is the date on which the Company obtains control of the acquired entity. Where the Company’s interest in a subsidiary is less than 100%, the Company recognizes a non-controlling interest. All intercompany balances, transactions, income, expenses and profits or losses have been eliminated on consolidation.
(ii)
Associates
An associate is an entity over which the Company has significant influence but neither control nor joint control. Significant influence is presumed to exist where the Company has between 20% and 50% of the voting rights, but can also arise where the Company has less than 20% of voting rights but has the power to be actively involved and influence in policy decisions affecting the entity. The Company's share of net assets and net income or loss of associates is accounted for in the consolidated financial statements using the equity method. The Company has concluded that it has significant influence over its investment in INV Metals Inc. (“INV Metals”) through the level of ownership of voting rights (refer to note 13). The Company has assessed additional facts and circumstances, including voting rights and board appointments, and concluded that it does not control INV Metals.
Share of net losses from the associate is recognized in the consolidated financial statements until the carrying amount of the interest in the associate is reduced to nil. Thereafter, losses are recognized only to the extent that the Company has an obligation to fund the associate’s operations or has made payments on behalf of the associate.
(iii)
Joint arrangements
Joint arrangements are those arrangements over which the Company has joint control established by contractual agreement and requiring unanimous consent of the joint venture parties for financial and operating decisions. The Company’s significant joint arrangements consist of joint ventures, which are structured through separate legal entities. The financial results of joint ventures are accounted for using the equity method from the date that joint control commences until the date that joint control ceases, and are prepared for the same reporting period as the Company, using consistent accounting policies. There are no significant judgments and assumptions made in determining the existence of joint control of Société d’Exploitation des Mines d’Or de Sadiola S.A.
Share of net losses from joint ventures are recognized in the consolidated financial statements until the carrying amount of the interest in the joint venture is reduced to nil. Thereafter, losses are recognized only to the extent that the Company has an obligation to fund the joint venture’s operations or has made payments on behalf of the joint venture.
Dividends received from the Company's joint ventures are presented in the Company's Consolidated statements of cash flows as operating activities.
(iv)
Unincorporated arrangements
The Company participates in an unincorporated arrangement and has rights to its share of the undivided assets, liabilities, revenues and expenses of the property, subject to the arrangement, rather than a right to a net return, and does not share joint control (note 10). All such amounts are measured in accordance with the terms of the arrangement, which is usually in proportion to the Company’s interest in the assets, liabilities, revenues and expenses of the property. These amounts are recorded in the Company’s consolidated financial statements on the appropriate lines.
(d)    Functional and presentation currency
The functional currency of the Company’s subsidiaries and joint ventures is the U.S. dollar. The functional currency of the associate (INV Metals) is the Canadian dollar. The presentation currency of the Company's consolidated financial statements is the U.S. dollar.
For the associate, assets and liabilities are translated at the exchange rate in effect at the balance sheet date. Revenues and expenses are translated at average exchange rates throughout the reporting period or at rates that approximate the actual exchange rates. Foreign exchange gains or losses on translation are included in other comprehensive income ("OCI"). The cumulative amount of the exchange differences is presented as a separate component of equity until disposal of the foreign operation.
Transactions denominated in foreign currencies are translated into the entity's functional currency as follows:
Monetary assets and liabilities are translated at the exchange rate in effect at the balance sheet date;
Non-monetary assets and liabilities are translated at historical exchange rates prevailing at each transaction date;
Deferred tax assets and liabilities are translated at the exchange rate in effect at the balance sheet date with translation gains and losses recorded in income tax expense; and
Revenues and expenses are translated at the average exchange rates throughout the reporting period, except depreciation, which is translated at the rates of exchange applicable to the related assets, and share-based compensation expense, which is translated at the rates of exchange applicable at the date of grant of the share-based compensation.
Exchange gains or losses on translation of transactions are included in the Consolidated statements of earnings. When a gain or loss on certain non-monetary items, such as financial assets at fair value through other comprehensive income, is recognized in OCI, the translation differences are also recognized in OCI.
v3.10.0.1
ADOPTION OF NEW ACCOUNTING STANDARDS (Notes)
12 Months Ended
Dec. 31, 2018
Accounting Changes and Error Corrections1 [Abstract]  
ADOPTION OF NEW ACCOUNTING STANDARDS
ADOPTION OF NEW ACCOUNTING STANDARDS
These consolidated financial statements have been prepared following the same accounting policies and methods of computation as the audited annual consolidated financial statements for the year ended December 31, 2017, except for the following new accounting standards and amendments to standards and interpretations, which were effective January 1, 2018, and were applied in preparing the consolidated financial statements for the year ended December 31, 2018. These are summarized as follows:
IFRS 15 - Revenue from Contracts with Customers
In May 2014, the IASB issued IFRS 15 - Revenue from Contracts with Customers ("IFRS 15"), which replaces IAS 11 - Construction Contracts and IAS 18 - Revenue. The objective of IFRS 15 is to establish a single, principles-based model to be applied to all contracts with customers in determining how and when revenue is recognized. IFRS 15 also requires entities to provide users of financial statements with more informative and relevant disclosures.
The Company adopted IFRS 15 effective January 1, 2018, with no adjustment to its consolidated financial statements. In accordance with IFRS 15, the Company has changed its accounting policy with respect to revenue recognition as follows:
The Company recognizes revenue when it transfers control of a product to the customer. The principal activity from which the Company generates its revenue is the sale of gold to third parties. Delivery of the gold is considered to be the only performance obligation. Revenues are measured based on the consideration specified in the contract with the customer.
IFRS 9 - Financial Instruments
In July 2014, the IASB issued the final version of IFRS 9 (2014) - Financial Instruments (“IFRS 9”) to replace IAS 39 - Financial Instruments: Recognition and Measurement. Effective April 1, 2014, the Company early adopted all of the requirements of IFRS 9 (2013), which was the previously issued version of IFRS 9.
The Company adopted IFRS 9 effective January 1, 2018, with no adjustment to its consolidated financial statements.
IFRS 9 has a single, forward-looking ‘expected credit loss’ model for assessing impairment of financial assets (the “ECL model”), as opposed to an incurred loss model under IFRS 9 (2013). The application of the ECL model had minimal impact on the consolidated financial statements of the Company as the credit risk related to the financial assets of the Company is low and historically, customer defaults have been negligible.
IFRIC 22 - Foreign Currency Transactions and Advance Consideration
In December 2016, the IASB issued IFRIC Interpretation 22 - Foreign Currency Transactions and Advance Consideration. The interpretation clarifies which date should be used for translation of a foreign currency transaction when an entity recognizes a non-monetary asset or non-monetary liability arising from the payment or receipt of advance consideration before the entity recognizes the related asset, expense or income (or part of it).
The interpretation was applicable for annual periods beginning on or after January 1, 2018. The Company adopted the interpretation effective January 1, 2018, with no adjustment to its consolidated financial statements.
NEW ACCOUNTING STANDARDS ISSUED BUT NOT YET EFFECTIVE    
The following new accounting standards were not yet effective for the year ended December 31, 2018, and have not been applied in preparing these consolidated financial statements.
IFRS 16 - Leases
In January 2016, the IASB issued IFRS 16 - Leases ("IFRS 16").  The objective of IFRS 16 is to recognize substantially all leases on balance sheet for lessees. IFRS 16 requires lessees to recognize a "right-of-use" asset and a lease liability calculated using a prescribed methodology, except for short-term leases and leases with low value underlying assets. In addition, the nature and timing of expenses related to leases will change, as IFRS 16 replaces the straight-line operating leases expense with the depreciation expense for the assets and interest expense on the lease liabilities. The effective date of IFRS 16 is for annual periods beginning on or after January 1, 2019. A lessee can choose to apply IFRS 16 using either a full retrospective or a modified retrospective approach.
The Company will adopt IFRS 16 for the annual period beginning January 1, 2019 using the modified retrospective approach which does not require restatement of comparative periods. Instead, the cumulative impact of applying IFRS 16 will be accounted for as an adjustment to equity at the beginning of 2019. The Company elected to apply the practical expedient to grandfather its previous assessment of which existing contracts are, or contain, leases.
The Company expects IFRS 16 will result in the recognition of additional right of use assets and lease liabilities on the balance sheet, a decrease in lease expense and a corresponding increase in depreciation and interest expenses. The Company also expects cash flows from operating activities to increase under IFRS 16 as lease payments for substantially all leases will be recorded as financing outflows in the Consolidated statement of cash flows as opposed to operating cash flows.
The Company has substantially completed its assessment of existing operating leases and will finalize its assessment and report more detailed information in its first quarter 2019 consolidated interim financial statements.
IFRIC 23 - Uncertainty over Income Tax Treatments
In June 2017, the IASB issued IFRIC Interpretation 23 - Uncertainty over Income Tax Treatments. This interpretation provides guidance on the accounting for current and deferred tax liabilities and assets in circumstances in which there is uncertainty over income tax treatments. The interpretation is applicable for annual periods beginning on or after January 1, 2019. The Company will adopt the interpretation for the annual period beginning on January 1, 2019, and expects that there will be no material impact on the Company's consolidated financial statements.
v3.10.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES        
The accounting policies set out below have been applied consistently by the Company, for its subsidiaries, joint arrangements and associate in all periods presented in these consolidated financial statements.
(a)
Financial instruments
The Company recognizes financial assets and financial liabilities on the date the Company becomes a party to the contractual provisions of the instruments. A financial asset is derecognized either when the Company has transferred substantially all the risks and rewards of ownership of the financial asset or when cash flows expire. A financial liability is derecognized when the obligation specified in the contract is discharged, canceled or expired. Certain financial instruments are recorded at fair value in the Consolidated balance sheets. Refer to note 22 on fair value measurements.
(i)
Non-derivative financial instruments
Non-derivative financial instruments are recognized initially at fair value plus attributable transaction costs, where applicable for financial instruments not classified as fair value through profit or loss. Subsequent to initial recognition, non-derivative financial instruments are classified and measured as described below.
Financial assets at fair value through profit or loss
Cash and cash equivalents, restricted cash, short-term investments, bond fund investments and warrants are classified as financial assets at fair value through profit or loss and are measured at fair value. Cash equivalents are short-term investments with initial maturities of three months or less. Short-term investments have initial maturities of more than three months and less than 12 months. The unrealized gains or losses related to changes in fair value are reported in Interest income and derivatives and other investment gains (losses) in the Consolidated statements of earnings.
Amortized cost
Trade and other receivables and fixed rate investments are classified as and measured at amortized cost using the effective interest rate method, less impairment losses, if any.
Financial assets at fair value through other comprehensive income
The Company’s investments in equity marketable securities are designated as financial assets at fair value through other comprehensive income and are recorded at fair value on the trade date with directly attributable transaction costs included in the recorded amount. Subsequent changes in fair value are recognized in other comprehensive income.
Non-derivative financial liabilities
Accounts payable, accrued liabilities, senior notes, and borrowings under the credit facility are accounted for at amortized cost, using the effective interest rate method. The amortization of senior notes issue costs is calculated using the effective interest rate method, and the amortization of credit facility issue costs is calculated on a straight-line basis over the term of the credit facility.
(ii)Non-hedge derivatives
The Company may hold derivative financial instruments to hedge its risk exposure to fluctuations of other currencies compared to the U.S. dollar, and fluctuations in commodity prices such as for oil and fuel. All derivative financial instruments not designated in a hedge relationship that qualifies for hedge accounting are classified as financial instruments at fair value through profit or loss. Derivative financial instruments at fair value through profit or loss, including embedded derivatives, requiring separation from its host contact, are recorded in the Consolidated balance sheets at fair value.
Changes in the estimated fair value of non-hedge derivatives at each reporting date are included in the Consolidated statements of earnings as non-hedge derivative gain or loss.
Embedded derivatives in financial liabilities measured at amortized cost are separated from the host contract and accounted for separately if the economic characteristics and risks of the host contract and the embedded derivative are not closely related.
(iii)Hedge derivatives
The Company uses derivative financial instruments to hedge its exposure to exchange rate fluctuations on foreign currency denominated revenues, operating expenses and purchases of non-financial assets and its exposure to price fluctuations of consumable purchases.
The Company formally documents all relationships between hedging instruments and hedged items, as well as its risk management objectives and strategies for undertaking hedge transactions. This process includes linking all derivative hedging instruments to forecasted transactions. Hedge effectiveness is assessed based on the degree to which the cash flows from the derivative contracts are expected to offset the cash flows of the underlying transaction being hedged.
When a derivative is designated as a cash flow hedging instrument, the effective portion of changes in fair value is recognized in other comprehensive income, net of tax. For hedged items other than the purchase of non-financial assets, the amounts accumulated in other comprehensive income are reclassified to the Consolidated statements of earnings when the underlying hedged transaction, identified at contract inception, affects profit or loss. When hedging a forecasted transaction that results in the recognition of a non-financial asset, the amounts accumulated in equity are removed and added to the carrying amount of the non-financial asset.
Any ineffective portion of a hedge relationship is recognized immediately in the Consolidated statements of earnings. The Company has elected to exclude the time value component of options and the forward element of forward contracts from the hedging relationships, with changes in these amounts recorded in other comprehensive income and treated as a cost of hedging. For hedged items other than the purchase of non-financial assets, the cost of hedging amounts is reclassified to the Consolidated statements of earnings when the underlying hedged transaction affects profit or loss. When hedging a forecasted transaction that results in the recognition of a non-financial asset, the cost of hedging is added to the carrying amount of the non-financial asset.
When derivative contracts designated as cash flow hedges are terminated, expired, sold or no longer qualify for hedge accounting, hedge accounting is discontinued prospectively. Any amounts recorded in other comprehensive income up until the time the contracts do not qualify for hedge accounting remain in other comprehensive income. Amounts recognized in other comprehensive income are recognized in the Consolidated statements of earnings in the period in which the underlying hedged transaction is completed. Gains or losses arising subsequent to the derivative contracts not qualifying for hedge accounting are recognized in the period incurred in the Consolidated statements of earnings.
If the forecasted transaction is no longer expected to occur, then the amounts accumulated in other comprehensive income are reclassified to the Consolidated statements of earnings immediately.
(b)
Inventories
Finished goods and ore stockpiles are measured at the lower of weighted average production cost and net realizable value. Mine supplies are measured at the lower of average purchase cost and net realizable value. Net realizable value is calculated as the difference between the estimated selling price and estimated costs to complete processing into a saleable form plus variable selling expenses.
Production costs include the cost of materials, labour, mine site production overheads and depreciation to the applicable stage of processing. Production overheads are allocated to inventory based on the normal capacity of production facilities.
The cost of ore stockpiles is increased based on the related current cost of production for the period, and decreases in stockpiles are charged to cost of sales using the weighted average cost per tonne. Stockpiles are segregated between current and non-current inventories in the Consolidated balance sheets based on the period of planned usage.
The cost of inventory is reduced to net realizable value to reflect changes in grades, quantity or other economic factors and to reflect current intentions for the use of redundant or slow-moving items. Provisions for redundant and slow-moving items are made by reference to specific items of inventory. The Company reverses write-downs when there is a subsequent increase in net realizable value and where the inventory is still on hand.
Spare parts, stand-by and servicing equipment held are generally classified as inventories. Major capital spare parts and stand-by equipment (insurance spares) are classified as a component of property, plant and equipment.
(c)
Property, plant and equipment
Property, plant and equipment are measured at cost less accumulated depreciation and accumulated impairment charges.
The initial cost of an asset comprises its purchase or construction cost, any costs directly attributable to bringing the asset to a working condition for its intended use, the initial estimate of the asset retirement obligation, and for qualifying assets, borrowing costs.
The purchase price or the construction cost is the aggregate cash paid and the fair value of any other consideration given to acquire the asset.
Gains or losses on disposal of an item of property, plant and equipment are determined by comparing the proceeds from disposal with the carrying amount of property, plant and equipment, and are recognized in the Consolidated statements of earnings in other expenses.
The cost of replacing part of an item of property, plant and equipment is recognized in the carrying amount of the item if it is probable that the future economic benefits embodied within the part will flow to the Company and its cost can be measured reliably. The carrying amount of the replaced part is de-recognized. Costs of the day-to-day servicing of property, plant and equipment are recognized in the Consolidated statements of earnings as incurred.
Property, plant and equipment presented in the Consolidated balance sheets represents the capitalized expenditures related to: construction in progress; mining properties, stripping costs; and plant and equipment, including corporate assets.
(i)
Construction in progress
Upon determination of technical feasibility and commercial viability of extracting a mineral resource, the related exploration and evaluation assets (refer to note 4(e) below) are transferred to construction in progress costs. These amounts plus all subsequent mine development costs are capitalized. Costs are not depreciated until the project is ready for use as intended by management.
Mine construction costs include expenditures to develop new ore bodies, define further mineralization in existing ore bodies, and construct, install and complete infrastructure facilities.
Borrowing costs are capitalized and allocated specifically to qualifying assets when funds have been borrowed, either to specifically finance a project or for general borrowings during the period of construction.
Qualifying assets are defined as assets that require more than six months to be brought to the location and condition intended by management. Capitalization of borrowing costs ceases when such assets are ready for their intended use.
The date of transition from construction to production accounting is based on both qualitative and quantitative criteria such as substantial physical project completion, sustained level of mining, sustained level of processing activity, and passage of a reasonable period of time. Upon completion of mine construction activities (based on the determination of the commencement of production), costs are removed from construction in progress assets and classified into the appropriate categories of property, plant and equipment and supplies inventories.
(ii)Mining properties
Capitalized costs for evaluation on or adjacent to sites where the Company has mineral deposits, are classified as mining properties within property, plant and equipment.
(iii)
Stripping costs
Costs associated with stripping activities in an open pit mine are expensed within cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to mining properties within property, plant and equipment. Furthermore, stripping costs are capitalized to inventory to the extent that the benefits of the stripping activity relate to gold production inventories, concentrate inventory or ore stockpiles.
(iv)
Plant and equipment
Plant and equipment located at corporate locations includes the following categories of assets: furniture and equipment, computer equipment, software, scientific instruments and equipment, vehicles and leasehold improvements and at the mine site includes land and buildings, plant equipment, capital spares, and other equipment.
(d)
Depreciation
Effective from the point an asset is available for its intended use, property, plant and equipment are depreciated using either the straight-line or units-of-production methods over the shorter of the estimated economic life of the asset or the mining operation. Depreciation is determined based on the method which best represents the use of the assets.
The reserve and resource estimates for each mining operation are the prime determinants of the life of a mine. In general, when the useful life of property, plant and equipment is akin to the life of the mining operation and the ore body's mineralization is reasonably well defined, the asset is depreciated on a units-of-production basis over its proven and probable mineral reserves. Non-reserve material may be included in depreciation calculations in limited circumstances where there is a high degree of confidence in its economic extraction. The Company evaluates the estimate of mineral reserves and resources at least on an annual basis and adjusts the units-of-production method calculation prospectively. In 2018 and 2017, the Company has not incorporated any non-reserve material in its depreciation calculations on a units-of-production basis. When property, plant and equipment are depreciated on a straight-line basis, the useful life of the mining operation is determined based on the most recent life of mine (“LOM”) plan. LOM plans are typically developed annually and are based on management’s current best estimates of optimized mine and processing plans, future operating costs and the assessment of capital expenditures of a mine site.
Estimated useful lives normally vary from three to fifteen years for items of plant and equipment to a maximum of twenty years for buildings.
Amounts related to expected economic conversions of resources to reserves recorded in an asset acquisition are not depreciated until resources are converted into reserves. Amounts related to capitalized costs of exploration and evaluation assets and construction in progress are not depreciated as the assets are not available for use.
Capitalized stripping costs are depreciated over the reserves that directly benefit from the specific stripping activity using the units-of-production method.
Capitalized borrowing costs are depreciated over the useful life of the related asset.
Residual values, useful lives and depreciation methods are reviewed at least annually and adjusted if appropriate. The impact of changes to the estimated useful lives, change in depreciation method or residual values is accounted for prospectively.
(e)
Mineral exploration and evaluation expenditures
Exploration activities relate to the collection of exploration data which consists of geological, geophysical, geochemical, sampling, drilling, trenching, analytical test work, assaying, mineralogical, metallurgical, and other similar information that is derived from activities undertaken to locate, investigate, define or delineate a mineral prospect or mineral deposit. Mineral exploration costs are expensed as incurred.
Evaluation costs are capitalized and relate to activities to evaluate the potential technical feasibility and commercial viability of extracting a mineral resource on sites where the Company does not have mineral deposits already being mined or constructed. The technical feasibility and commercial viability is based on management’s evaluation of the geological properties of an ore body based on information obtained through evaluation activities, including metallurgical testing, resource and reserve estimates and economic assessment whether the ore body can be mined economically. Exploration properties acquired through asset acquisitions are also recognized as exploration and evaluation assets.
(f)
Other intangible assets
Other intangible assets pertain to the fair value of favourable supplier contracts related to a prior acquisition. The fair value was determined using a differential cost method based on cost savings expected from favourable terms of supplier contracts. Other intangible assets are amortized under the straight-line method based on the terms of each contract, which range from 2 to 20 years. Other intangible assets are classified in Other non-current assets in the Consolidated balance sheets.
(g)
Impairment and reversal of impairment
(i)
Financial assets
Financial assets measured at amortized cost are reviewed for impairment at each reporting date to determine whether there is any objective evidence of impairment. A financial asset is considered to be impaired if objective evidence, that can be estimated reliably, indicates that one or more events have had a negative effect on the estimated future cash flows of that asset.
An impairment charge in respect of a financial asset measured at amortized cost is calculated as the difference between its carrying amount and the present value of the estimated future cash flows discounted at the original effective interest rate.
A prior period impairment charge is reviewed for possible reversal of impairment whenever an event or change in circumstance indicates the impairment may have reversed. If it has been determined that the impairment has reversed, the carrying amount of the asset is increased to its recoverable amount to a maximum of the carrying amount that would have been determined had no impairment charge been recognized in prior periods. Impairment charge reversals are recognized in the Consolidated statements of earnings.
(ii)
Non-financial assets
The carrying amounts of the Company’s non-current assets, including property, plant and equipment and exploration and evaluation assets, are reviewed at each reporting date to determine whether there is any indication of impairment. If any such indicator exists, the Company performs an impairment test.
An impairment test requires the Company to determine the recoverable amount of an asset or group of assets. For non-current assets, including property, plant and equipment and exploration and evaluation assets, the recoverable amount is determined for an individual asset, unless the asset does not generate cash inflows that are largely independent of those from other assets or groups of assets. If this is the case, the individual assets are grouped together into a cash generating unit ("CGU") for impairment testing purposes. A CGU for impairment testing is typically considered to be an individual mine site or a development project.
The recoverable amount is determined as the higher of the CGU’s fair value less costs of disposal (“FVLCD”) and value in use (“VIU”). If the carrying amount of the asset or CGU exceeds its recoverable amount, an impairment charge is recorded to the other long-lived assets in the CGU on a pro rata basis.
An assessment is made at each reporting date to determine whether there is an indication that previously recognized impairment losses may no longer exist or may have reversed. If it has been determined that the impairment has reversed, the carrying amount of the asset is increased to its recoverable amount to a maximum of the carrying amount that would have been determined had no impairment charge been recognized in prior periods. An impairment charge reversal is recognized in the Consolidated statements of earnings. Impairment charges recognized in relation to goodwill are not reversed for subsequent increases in a CGU’s recoverable amount.
In the absence of market related comparative information, the FVLCD is determined based on the present value of estimated future cash flows from each long-lived asset or CGU. The assumptions used in determining the FVLCD for the CGU’s are typically life-of-mine ("LOM") production profiles, long-term commodity prices, reserves and resources, discount rates, foreign exchange rates, values of un-modeled mineralization, capital expenditures, net asset value (“NAV”) multiples and expected commencement of production for exploration and evaluation projects. Management’s assumptions and estimates of future cash flows are subject to risks and uncertainties, particularly in market conditions where higher volatility exists, and may be partially or totally outside of the Company's control. Therefore, it is reasonably possible that changes could occur with evolving economic conditions, which may affect the recoverability of the Company’s long-lived assets. If the Company fails to achieve its valuation assumptions or if any of its long-lived assets or CGUs experience a decline in their fair value, this may result in an impairment charge in future periods, which would reduce the Company's earnings.
(h)
Asset retirement obligations
The Company records the present value of estimated costs of legal and constructive obligations required to restore locations in the period in which the obligation is incurred with a corresponding increase in the carrying amount of the related property, plant and equipment. For locations where mining activities have ceased, changes to obligations are charged directly to the Consolidated statements of earnings. The obligation is generally considered to have been incurred when mine assets are constructed or the ground environment is disturbed at the production location. The discounted liability is adjusted at the end of each period to reflect the passage of time, based on a risk-free discount rate that reflects current market assessments, and changes in the estimated future cash flows underlying the obligation.
The Company also estimates the timing of the outlays, which are subject to change depending on continued operation or newly discovered reserves.
The periodic unwinding of the discount is recognized in earnings as accretion expense included in finance costs in the Consolidated statements of earnings. Additional disturbances or changes in restoration costs or in discount rates are recognized as changes to the corresponding assets and asset retirement obligation when they occur. Environmental costs at operating mines, as well as changes to estimated costs and discount rates for closed sites, are charged to earnings in the period during which they occur.
(i)
Other provisions
Provisions are recognized when a legal or constructive present obligation exists as a result of a past event, for which it is probable that an outflow of economic resources will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation.
Provisions are reviewed at the end of each reporting period and adjusted to reflect management's current best estimate of the expenditure required to settle the present obligation at the end of the reporting period. If it is no longer probable that an outflow of resources embodying economic benefits will be required to settle the obligation, the provision is reversed. Provisions are reduced by actual expenditures for which the provision was originally recognized.
Certain conditions may exist as of the date of the consolidated financial statements, which may result in a loss to the Company, but which will only be resolved when one or more future events will occur or fail to occur. If the assessment of a contingency determines that a loss is probable, and the amount can be reliably estimated, then a provision is recorded. When a contingent loss is not probable but is reasonably possible, then the contingent liability is disclosed in the consolidated financial statements.
(j)
Income taxes
(i)
Current income tax
Current income tax assets and liabilities for the current and prior periods are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted by the balance sheet date.
Current income tax assets and current income tax liabilities are only offset if a legally enforceable right exists to set off the amounts, and the Company intends to settle on a net basis or to realize the asset and settle the liability simultaneously.
Current income taxes related to items recognized directly in equity are recognized directly in equity.
(ii)
Deferred income tax
Deferred income tax is recognized in respect of temporary differences between the carrying amounts of assets and liabilities in the Consolidated balance sheets and tax bases.
Deferred income tax liabilities are recognized for all taxable temporary differences, except:
Where the deferred income tax liability arises from the initial recognition of goodwill or of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither accounting profit nor taxable profit (tax loss); and
In respect of taxable temporary differences associated with investments in subsidiaries, associates and joint ventures, where the timing of the reversal of the temporary differences can be controlled by the parent or venture and it is probable that the temporary differences will not reverse in the foreseeable future.
Deferred income tax assets are recognized for all deductible temporary differences, carry forward of unused tax credits and unused tax losses, to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, the carry forward of unused tax credits and unused tax losses can be used, except:
When the temporary difference results from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither accounting profit nor taxable profit (tax loss); and
In respect of deductible temporary differences associated with investments in subsidiaries, associates and joint ventures, deferred income tax assets are recognized only to the extent that it is probable that the temporary differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be used.
The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be used. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered.
A translation gain or loss may arise for deferred income tax purposes where the local tax currency is not the same as the functional currency for non-monetary assets. A deferred tax asset or liability is recognized on the difference between the carrying amount for accounting purposes (which reflects the historical cost in the entity’s functional currency) and the underlying tax basis (which reflects the current local tax cost, translated into the functional currency using the current foreign exchange rate). The translation gain or loss is recorded in Income taxes on the Consolidated statements of earnings.
Deferred income tax assets and liabilities are measured at the tax rates that are expected to apply to the year when the asset is expected to be realized or the liability settled, based on tax rates (and tax laws) that have been enacted or substantively enacted at the balance sheet date.
Deferred income taxes related to items recognized directly in equity are recognized directly in equity.
Deferred income tax assets and deferred income tax liabilities are offset, if a legally enforceable right exists to set off current income tax assets against current income tax liabilities and the deferred income taxes relate to the same taxable entity and the same taxation authority.
There is no certainty that future income tax rates will be consistent with current estimates.
(k)
Flow-through common shares
The Company recognizes flow-through common shares in equity based on the quoted market price of the existing shares on the date of issue. The difference between the amount recognized in common shares and the amount the investors pay for the shares is recognized as a deferred gain which is reversed into earnings as eligible expenditures are incurred. The deferred income tax impact is recorded as eligible expenditures are incurred.
(l)
Earnings per share
The Company presents basic and diluted earnings per share data for its common shares. Basic earnings per share are calculated by dividing earnings attributable to equity holders by the weighted average number of common shares outstanding during the period. Diluted earnings per share are determined by adjusting the weighted average number of common shares for the dilutive effect of share-based payments, employee incentive share units, and warrants using the treasury stock method. Under this method, share options whose exercise price is less than the average market price of the Company’s common shares, are assumed to be exercised and the proceeds used to repurchase common shares at the average market price for the period. The incremental number of common shares issued under share options and restricted share units and repurchased from proceeds is included in the calculation of diluted earnings per share.
(m)
Share-based compensation
The Company has the following share-based compensation plans with related costs included in general and administrative expenses.
(i)
Share options, share bonus plan, and deferred share plan
The Company operates a number of equity-settled share-based compensation plans in respect to its employees. Share-based compensation costs are measured based on the grant date fair value of the equity-settled instruments and recognized upon grant date over the related service period in the Consolidated statements of earnings and credited to contributed surplus within shareholders’ equity. The Company uses the graded vesting method for attributing share option expense over the vesting period.
The grant date fair value is based on the underlying market price of the shares of the Company taking into account the terms and conditions upon which those equity-settled instruments were granted. The fair value of equity-settled instruments granted is estimated using the Black-Scholes model or other appropriate method and assumptions at grant date. Equity-settled awards are not re-measured subsequent to the initial grant date.
Determination of the grant date fair value requires management estimates such as risk-free interest rate, volatility and weighted average expected life. Share option expense incorporates an expected forfeiture rate which is estimated based on historical forfeiture rates and expectations of future forfeiture rates. The Company makes adjustments if the actual forfeiture rate differs from the expected rate.
The weighted average grant date fair value is the basis for which share-based compensation is recognized in earnings.
Upon exercise of options and/or issuance of shares, consideration paid by employees, as well as the grant date fair value of the equity-settled instruments, are transferred to common shares.
    (ii) Share purchase plan
The Company provides a share purchase plan where the Company contributes towards the purchase of shares on the open market. The Company’s contribution vests on December 31 of each year and is charged to earnings in the year of contribution.
(n)
Revenue recognition
Revenues include sales of gold and by-products.
The Company recognizes revenue when it transfers control of a product to the customer. The principal activity from which the Company generates its revenue is the sale of gold to third parties. Delivery of the gold is considered to be the only performance obligation. Revenues are measured based on the consideration specified in the contract with the customer.
(o)
Leases
The determination of whether an arrangement is, or contains, a lease is based on the substance of the contractual arrangement at inception date, including whether the arrangement contains the use of a specific asset and the right to use that asset. Where the Company receives substantially all the risks and rewards of ownership of the asset, these arrangements are classified as finance leases. Finance leases are recorded as an asset with a corresponding liability at an amount equal to the lower of the fair value of the leased asset and the present value of the minimum lease payments. Each lease payment is allocated between the liability and finance costs using the effective interest method, with the interest element of the lease charged to the Consolidated statements of earnings as a finance cost. Property, plant and equipment acquired under finance leases are depreciated over the shorter of the useful life of the asset and the lease term.
All other leases are classified as operating leases. Operating lease payments are recognized in the Consolidated statements of earnings on a straight-line basis over the lease term.
(p)
Segmented information
The Company’s operating segments are those operations whose operating results are reviewed by the Company’s chief operating decision maker ("CODM") to make resource allocation decisions and assess their performance. The Company's CODM is its Executive Committee. Operating segments whose revenues, net earnings or losses or assets exceed 10% of the total consolidated revenues, net earnings or losses or assets, are reportable segments.
In order to determine the reportable operating segments, various factors are considered, including geographical location and managerial structure. It was determined that the Company’s gold segment is divided into reportable geographic segments. The Company’s other reportable segments have been determined to be the exploration and evaluation and Corporate operating segments, which includes royalty interests located in Canada and investments in associates and joint ventures. The Company discloses segmented information for its joint ventures as it is reviewed regularly by the CODM as part of the performance assessment and resource allocation decision making processes. The operations for the joint ventures in Sadiola and Yatela have been combined for segmented information purposes as they operate in the same geographical location and share production resources and facilities.
(q)
Significant accounting judgments, estimates and assumptions
The preparation of consolidated financial statements in conformity with IFRS requires management to make judgments, estimates and assumptions that affect the reported amounts of assets, liabilities and contingent liabilities at the date of the consolidated financial statements and reported amounts of revenues and expenses during the reporting period. Estimates and assumptions are continuously evaluated and are based on management’s experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances.
Assumptions about the future and other major sources of estimation uncertainty at the end of the reporting period have a significant risk of resulting in a material adjustment to the carrying amounts of assets and liabilities, within the next financial year. The most significant judgments and sources of estimation uncertainty that the Company believes could have a significant impact on the amounts recognized in its consolidated financial statements are described below.
(i)
Mineral reserves and resources
Key sources of estimation uncertainty
Mineral reserves and resources have been estimated by qualified persons as defined in accordance with Canadian Securities Administrators’ National Instrument 43‑101 Standards of Disclosure for Mineral Projects requirements. Mineral reserve and resource estimates include numerous uncertainties and depend heavily on geological interpretations and statistical inferences drawn from drilling and other data, and require estimates of the future price for the commodity and the future cost of operations. The mineral reserve and resource estimates are subject to uncertainty and actual results may vary from these estimates. Results from drilling, testing and production, as well as material changes in metal prices and operating costs subsequent to the date of an estimate, may justify revision of such estimates.
A number of accounting estimates, as described in the relevant accounting policy notes, are impacted by the mineral reserve and resource estimates, which form the basis of the Company's LOM plans:
Capitalization and depreciation of stripping costs (note 4(c)(iii));
Determination of the useful life of property, plant and equipment and measurement of the depreciation expense (note 4(d));
Exploration and evaluation of mineral resources and determination of technical feasibility and commercial viability (note 4(e)). The application of the Company’s accounting policy for exploration and evaluation expenditures requires judgment in determining whether future economic benefits may be realized, which are based on assumptions about future events and circumstances;
Consideration of whether assets acquired meet the definition of a business or should be accounted for as an asset acquisition (note 6);
Impairment and reversal of impairment analysis of non-financial assets including evaluation of estimated future cash flows of CGUs (note 4(g)(ii)); and
Estimates of the outlays and their timing for asset retirement obligations (note 4(h)).
(ii)
Impairment and reversal of impairment assessment of non-financial assets
Key sources of estimation uncertainty
Management’s assumptions and estimate of future cash flows used in the Company’s impairment assessment of non-financial assets are subject to risk and uncertainties, particularly in market conditions where higher volatility exists, and may be partially or totally outside of the Company's control.
If an indication of impairment or reversal of a previous impairment charge exists, or if an Exploration and evaluation asset is determined to be technically feasible and commercially viable, an estimate of a CGU's recoverable amount is calculated. The recoverable amount is based on the higher of FVLCD and VIU using a discounted cash flow methodology taking into account assumptions that would be made by market participants, unless there is a market price available based on a recent purchase or sale of a mine. Cash flows are for periods up to the date that mining is expected to cease which depends on a number of variables including recoverable mineral reserves and resources, expansion plans and the forecasted selling prices for such production.
In estimating the net realizable value of inventories, a significant estimate is made regarding the quantities of saleable metals included in stockpiles based on the quantities of ore, the grade of ore and the estimated recovery percentage. There can be no assurance that actual quantities will not differ significantly from estimates used.
Judgments made in relation to accounting policies
Both internal and external sources of information are required to be considered when determining whether an impairment indicator or indicator of a previous impairment has reversed may be present. Judgment is required around significant adverse changes in the business climate which may be indicators for impairment such as a significant decline in the asset’s market value, decline in resources and/or reserves as a result of geological re-assessment or change in timing of extraction of resources and/or reserves which would result in a change in the discounted cash flow obtained from the site, and lower metal prices or higher input cost prices than would have been expected since the most recent valuation of the site. Judgment is also required when considering whether significant positive changes in any of these items indicate a previous impairment may have reversed.
Judgment is required to determine whether there are indications that the carrying amount of an exploration project is unlikely to be recovered in full from successful development of the project or by sale.
(iii)
Derivative financial instruments
Judgments made in relation to accounting policies
Judgment is required to determine if an effective hedging relationship exists throughout the financial reporting period for derivative financial instruments classified as either a fair value or cash flow hedge. Management assesses the relationships on an ongoing basis to determine if hedge accounting is appropriate.
Key sources of estimation uncertainty
The Company monitors on a regular basis its hedge position for its risk exposure to fluctuations of the U.S. dollar compared to other currencies, and fluctuations in commodity prices such as for oil and gold. Forecasts are based on estimates of future transactions. For its derivative contracts, valuations are based on forward rates considering the market price, rate of interest and volatility, and take into account the credit risk of the financial instrument. Refer to note 21 for more detailed information and sensitivity analyses based on changes in currencies and commodity prices.
(iv)
Provisions and recognition or not of a liability for loss contingencies
Judgments made in relation to accounting policies
Judgments are required to determine if a present obligation exists at the end of the reporting period and by considering all available evidence, including the opinion of experts. The most significant provisions that require judgment to determine if a present obligation exists are asset retirement obligations (AROs). This includes assessment of how to account for obligations based on the most recent closure plans and environmental regulations.
Key sources of estimation uncertainty
Provisions related to present obligations, including AROs, are management’s best estimate of the amount of probable future outflow, expected timing of payments, and discount rates. Refer to note 17.
(v) Unincorporated arrangements
Judgments made in relation to accounting policies
The Company applies its judgment in the interpretation of relevant guidance under IFRS 11 Joint Arrangements to account for its interest in unincorporated arrangements (note 10).
(vi) Determination of deferred income tax assets
Key sources of estimation uncertainty
The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be used. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered. There is no certainty that future income tax rates will be consistent with current estimates. Changes in tax rates increase the volatility of the Company’s earnings. For more information, refer to notes 4(j)(ii) and 19.
v3.10.0.1
NEW ACCOUNTING STANDARDS ISSUED BUT NOT YET EFFECTIVE
12 Months Ended
Dec. 31, 2018
Accounting Policies, Changes In Accounting Estimates And Errors [Abstract]  
NEW ACCOUNTING STANDARDS ISSUED BUT NOT YET EFFECTIVE
ADOPTION OF NEW ACCOUNTING STANDARDS
These consolidated financial statements have been prepared following the same accounting policies and methods of computation as the audited annual consolidated financial statements for the year ended December 31, 2017, except for the following new accounting standards and amendments to standards and interpretations, which were effective January 1, 2018, and were applied in preparing the consolidated financial statements for the year ended December 31, 2018. These are summarized as follows:
IFRS 15 - Revenue from Contracts with Customers
In May 2014, the IASB issued IFRS 15 - Revenue from Contracts with Customers ("IFRS 15"), which replaces IAS 11 - Construction Contracts and IAS 18 - Revenue. The objective of IFRS 15 is to establish a single, principles-based model to be applied to all contracts with customers in determining how and when revenue is recognized. IFRS 15 also requires entities to provide users of financial statements with more informative and relevant disclosures.
The Company adopted IFRS 15 effective January 1, 2018, with no adjustment to its consolidated financial statements. In accordance with IFRS 15, the Company has changed its accounting policy with respect to revenue recognition as follows:
The Company recognizes revenue when it transfers control of a product to the customer. The principal activity from which the Company generates its revenue is the sale of gold to third parties. Delivery of the gold is considered to be the only performance obligation. Revenues are measured based on the consideration specified in the contract with the customer.
IFRS 9 - Financial Instruments
In July 2014, the IASB issued the final version of IFRS 9 (2014) - Financial Instruments (“IFRS 9”) to replace IAS 39 - Financial Instruments: Recognition and Measurement. Effective April 1, 2014, the Company early adopted all of the requirements of IFRS 9 (2013), which was the previously issued version of IFRS 9.
The Company adopted IFRS 9 effective January 1, 2018, with no adjustment to its consolidated financial statements.
IFRS 9 has a single, forward-looking ‘expected credit loss’ model for assessing impairment of financial assets (the “ECL model”), as opposed to an incurred loss model under IFRS 9 (2013). The application of the ECL model had minimal impact on the consolidated financial statements of the Company as the credit risk related to the financial assets of the Company is low and historically, customer defaults have been negligible.
IFRIC 22 - Foreign Currency Transactions and Advance Consideration
In December 2016, the IASB issued IFRIC Interpretation 22 - Foreign Currency Transactions and Advance Consideration. The interpretation clarifies which date should be used for translation of a foreign currency transaction when an entity recognizes a non-monetary asset or non-monetary liability arising from the payment or receipt of advance consideration before the entity recognizes the related asset, expense or income (or part of it).
The interpretation was applicable for annual periods beginning on or after January 1, 2018. The Company adopted the interpretation effective January 1, 2018, with no adjustment to its consolidated financial statements.
NEW ACCOUNTING STANDARDS ISSUED BUT NOT YET EFFECTIVE    
The following new accounting standards were not yet effective for the year ended December 31, 2018, and have not been applied in preparing these consolidated financial statements.
IFRS 16 - Leases
In January 2016, the IASB issued IFRS 16 - Leases ("IFRS 16").  The objective of IFRS 16 is to recognize substantially all leases on balance sheet for lessees. IFRS 16 requires lessees to recognize a "right-of-use" asset and a lease liability calculated using a prescribed methodology, except for short-term leases and leases with low value underlying assets. In addition, the nature and timing of expenses related to leases will change, as IFRS 16 replaces the straight-line operating leases expense with the depreciation expense for the assets and interest expense on the lease liabilities. The effective date of IFRS 16 is for annual periods beginning on or after January 1, 2019. A lessee can choose to apply IFRS 16 using either a full retrospective or a modified retrospective approach.
The Company will adopt IFRS 16 for the annual period beginning January 1, 2019 using the modified retrospective approach which does not require restatement of comparative periods. Instead, the cumulative impact of applying IFRS 16 will be accounted for as an adjustment to equity at the beginning of 2019. The Company elected to apply the practical expedient to grandfather its previous assessment of which existing contracts are, or contain, leases.
The Company expects IFRS 16 will result in the recognition of additional right of use assets and lease liabilities on the balance sheet, a decrease in lease expense and a corresponding increase in depreciation and interest expenses. The Company also expects cash flows from operating activities to increase under IFRS 16 as lease payments for substantially all leases will be recorded as financing outflows in the Consolidated statement of cash flows as opposed to operating cash flows.
The Company has substantially completed its assessment of existing operating leases and will finalize its assessment and report more detailed information in its first quarter 2019 consolidated interim financial statements.
IFRIC 23 - Uncertainty over Income Tax Treatments
In June 2017, the IASB issued IFRIC Interpretation 23 - Uncertainty over Income Tax Treatments. This interpretation provides guidance on the accounting for current and deferred tax liabilities and assets in circumstances in which there is uncertainty over income tax treatments. The interpretation is applicable for annual periods beginning on or after January 1, 2019. The Company will adopt the interpretation for the annual period beginning on January 1, 2019, and expects that there will be no material impact on the Company's consolidated financial statements.
v3.10.0.1
ACQUISITION
12 Months Ended
Dec. 31, 2018
Acquisition [Abstract]  
ACQUISITION
Merrex - Diakha-Siribaya Gold Project
On February 28, 2017, the Company acquired all of the issued and outstanding common shares and all of the outstanding common share purchase warrants and options of Merrex Gold Inc. ("Merrex"), that it did not already own. Merrex owns a 50% interest in the Diakha-Siribaya Gold Project in Mali. Including the 50% interest already held directly in the Diakha-Siribaya Gold Project, the Company has a 100% interest in the Project. IAMGOLD issued an aggregate of approximately 6.9 million common shares. The total purchase price amounted to $27.5 million, which included transaction costs of $0.2 million, and was net of cash and cash equivalents acquired of $0.1 million.
Based on management’s judgment, the acquisition did not meet the IFRS definition of a business combination as the primary asset (Diakha-Siribaya Gold Project) is an exploration stage property and has not identified economically recoverable ore reserves. Consequently, the transaction was recorded as an asset acquisition.
The purchase price allocation for this acquisition was finalized in 2017. The total purchase price was allocated to the assets acquired and the liabilities assumed based on the fair value of the total consideration transferred at the closing date of the acquisition.
Assets acquired and liabilities assumed
Notes
 
Exploration and evaluation assets


15
$
36.6

Current liabilities
 
(3.9
)
Other non-current liabilities
 
(0.4
)
 
 
$
32.3

Consideration transferred
 
 
Share consideration
 
$
27.4

Less: Cash and cash equivalents acquired
 
(0.1
)
Transaction costs
 
0.2

 
 
27.5

Initial investment1
13
4.8

 
 
$
32.3

1 Prior to completion of the above mentioned transaction, IAMGOLD owned approximately 45.8 million common shares of Merrex, which represented approximately 23% of Merrex's issued and outstanding common shares, and was accounted for as an investment in an associate, using the equity method (note 13). The carrying amount of the investment of $4.8 million on the date of the acquisition has been included in the total cost of the Merrex Exploration and evaluation assets (note 15).
v3.10.0.1
CASH AND CASH EQUIVALENTS
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
CASH AND CASH EQUIVALENTS
CASH AND CASH EQUIVALENTS
 
December 31,
2018
December 31,
2017
Cash
$
440.3

$
489.2

Short-term deposits with initial maturities of three months or less
174.8

174.9

 
$
615.1

$
664.1

v3.10.0.1
SHORT-TERM INVESTMENTS
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
SHORT-TERM INVESTMENTS
SHORT-TERM INVESTMENTS
 
 
December 31,
2018
December 31,
2017
Money market funds1
 
$
114.6

$
124.6

Other
 
4.4

2.6

 
 
$
119.0

$
127.2

1
Money market funds are comprised of short-term fund investments with redemption notice periods of 185 days.
v3.10.0.1
RESTRICTED CASH
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
RESTRICTED CASH
RESTRICTED CASH

The Company had long-term restricted cash of $23.9 million and $nil as at December 31, 2018 (December 31, 2017 - $19.5 million and $5.0 million), to guarantee the environmental indemnities related to the Essakane and Rosebel mines, respectively.
v3.10.0.1
CONSIDERATION RECEIVABLE
12 Months Ended
Dec. 31, 2018
Non-current Asset Held For Sale And Discontinued Operations [Abstract]  
CONSIDERATION RECEIVABLE
CONSIDERATION RECEIVABLE
Sale of a 30% interest in the Côté Gold Project
On May 8, 2017, the Company entered into a Memorandum of Understanding with Sumitomo Metal Mining Co., Ltd. ("SMM") under which SMM would acquire a 30% interest in the Côté Gold Project, including certain assets and liabilities attributable thereto, for an aggregate consideration of $195 million. On June 5, 2017, the Company entered into a definitive Investment Agreement and a definitive Joint Venture Agreement with SMM with respect to the Côté Gold Project and the transaction closed on June 20, 2017. On closing, the Company received $100 million of the consideration and the remaining consideration of $95 million was received during the fourth quarter of 2018, pursuant to releasing the Project feasibility study.

In 2017, the Company paid $3.5 million in transaction costs upon closing of the transaction. In December 2018, the Company paid a further $2.9 million on receipt of the remaining consideration of $95 million. The $95 million consideration receivable from SMM was discounted to its present value on June 20, 2017, and was carried at an amortized cost of $93.8 million as at December 31, 2017.
On closing, the Company recorded a net gain of $19.2 million on the sale of the 30% interest in the Côté Gold Project to SMM, which has been included under Interest income, derivatives and other investment gains (losses) (note 32) in the Consolidated statements of earnings.
v3.10.0.1
RECEIVABLES AND OTHER CURRENT ASSETS
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
RECEIVABLES AND OTHER CURRENT ASSETS
RECEIVABLES AND OTHER CURRENT ASSETS
 
Notes
December 31,
2018
December 31,
2017
Gold receivables
 
$
1.6

$

Income taxes receivable
 
4.0

3.2

Receivables from governments1
 
53.4

42.2

Receivables from related parties
37
0.1

0.1

Other receivables
 
4.1

6.7

Total receivables
 
63.2

52.2

Prepayment for other assets
 
2.9


Marketable securities
22(a)
0.5


Prepaid expenses
 
11.4

9.6

Derivatives
22(a)
0.1

14.1

 
 
$
78.1

$
75.9

1
Receivables from governments relate primarily to value added tax.
v3.10.0.1
INVENTORIES
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
INVENTORIES
INVENTORIES 
 
December 31,
2018
December 31,
2017
Finished goods
$
60.7

$
52.8

Ore stockpiles
27.3

5.0

Mine supplies
186.7

142.2

 
274.7

200.0

Non-current ore stockpiles
202.9

177.6

 
$
477.6

$
377.6


For the year ended December 31, 2018, the Company recognized a net realizable value write-down in finished goods and ore stockpiles amounting to $1.0 million (December 31, 2017 - $4.2 million).
For the year ended December 31, 2018, the Company recognized a write-down in mine supplies inventories amounting to $3.9 million (December 31, 2017 - $10.0 million).
For the year ended December 31, 2018, $nil was recognized in Cost of sales for costs relating to operating below normal capacity at Westwood (December 31, 2017 - $0.7 million).
v3.10.0.1
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES
12 Months Ended
Dec. 31, 2018
Interests In Other Entities [Abstract]  
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES
 
Notes
Associates1
Sadiola2
Yatela2
Total
Balance, January 1, 2017
 
$
5.7

$
46.9

$

$
52.6

Purchase of additional common shares of associate3
 
7.4



7.4

Currency translation adjustment
 
0.8



0.8

Share of net earnings (loss), net of income taxes
 
(1.4
)
16.5

(0.1
)
15.0

Share of net loss recorded as provision
 


0.1

0.1

Share of dividends received
 

(2.1
)

(2.1
)
Acquisition of control over associate4

 
(4.8
)


(4.8
)
Balance, December 31, 2017
 
7.7

61.3


69.0

Currency translation adjustment

(1.2
)


(1.2
)
Share of net earnings (loss), net of income taxes
 
(1.5
)
13.1

1.0

12.6

Share of net earnings recorded as a reduction of the provision
17


(1.0
)
(1.0
)
Share of dividends received


(2.1
)

(2.1
)
Other
 

(0.5
)

(0.5
)
Balance, December 31, 2018
 
$
5.0

$
71.8

$

$
76.8

1
IAMGOLD includes results based on the latest publicly available information.
2
The Company's incorporated joint ventures are not publicly listed.
3
Associate relates to INV Metals Inc. ("INV Metals"), a publicly traded company incorporated in Canada. The Company's ownership interest in INV Metals as at December 31, 2018 was 35.6% (December 31, 2017 - 35.6%). On March 2, 2017, the Company participated in INV Metals' common shares public equity offering and acquired an additional 9.8 million common shares of INV Metals at a price of C$1.00 per share for an aggregate amount of $7.4 million (C$9.8 million). This acquisition allowed the Company to maintain a 35.6% ownership in INV Metals.
4
As of February 28, 2017, the Company acquired all of the issued and outstanding common shares and all of the outstanding common share purchase warrants of Merrex Gold Inc. that it did not already own (note 6).
The following table reconciles the summarized balance sheet to the carrying amount of the Company’s interest in joint ventures:
 
 
December 31, 2018
December 31, 2017
 
 
Sadiola
Yatela
Sadiola
Yatela
Company's equity percentage of net assets of joint ventures
Notes
41%
40%
41%
40%
Share of net assets (liabilities) of joint ventures
 
$
72.3

$
(30.1
)
$
61.3

$
(31.1
)
Loss applied to loans receivable
 

16.0


16.0

Loss recognized in provision
17

14.1


15.1

Other
 
(0.5
)



Carrying amount of interest in joint ventures
 
$
71.8

$

$
61.3

$



Financial information for investments in Sadiola and Yatela, not adjusted for the percentage held by the Company, is summarized
below:
 
  Year ended December 31, 2018
Year ended December 31, 2017
Joint Ventures
Sadiola
Yatela
Sadiola
Yatela
Summarized statements of earnings
 
 
 
 
Revenues
$
180.9

$
6.0

$
192.5

$
7.7

Depreciation expense
(4.4
)

(4.0
)

Other expenses
(143.1
)
(3.8
)
(143.1
)
(8.0
)
Income tax (expense) recovery
(1.6
)
0.4

(5.2
)
(0.1
)
Net earnings (loss) and other comprehensive income (loss)
$
31.8

$
2.6

$
40.2

$
(0.4
)
 








Summarized balance sheet
December 31, 2018
December 31, 2017
Assets








Cash and cash equivalents
$
90.1

$
0.8

$
62.4

$
0.5

Other current assets
55.0

7.6

53.8

7.9

Non-current assets
251.5


314.5


 
$
396.6

$
8.4

$
430.7

$
8.4

Liabilities








Current liabilities
$
44.0

$
45.0

$
58.6

$
55.8

Non-current liabilities
176.1

38.3

222.4

30.2

 
$
220.1

$
83.3

$
281.0

$
86.0

Net assets (liabilities)
$
176.5

$
(74.9
)
$
149.7

$
(77.6
)

Associate's combined financial information as reported by INV Metals are summarized below:
 
12 Months ended1
 
2018
2017
Net loss
$
(2.9
)
$
(3.1
)
Other comprehensive income (loss)
1.3

(2.2
)
Comprehensive loss
$
(1.6
)
$
(5.3
)
1
IAMGOLD includes results based on the latest 12 months of publicly available information.
v3.10.0.1
PROPERTY, PLANT AND EQUIPMENT
12 Months Ended
Dec. 31, 2018
Property, plant and equipment [abstract]  
PROPERTY, PLANT AND EQUIPMENT
PROPERTY, PLANT AND EQUIPMENT
 
Construction
in progress
Mining
properties
Plant and
equipment
Total
Cost
 
 
 
 
Balance, January 1, 2017
$
2.8

$
2,336.5

$
1,886.9

$
4,226.2

Additions
20.9

128.3

83.1

232.3

Changes in asset retirement obligations

4.6


4.6

Disposals

(0.2
)
(31.2
)
(31.4
)
Transfers within Property, plant and equipment
(16.6
)
16.9

(0.3
)

Balance, December 31, 2017
7.1

2,486.1

1,938.5

4,431.7

Additions
41.0

162.1

91.5

294.6

Changes in asset retirement obligations

30.1


30.1

Disposals

(0.3
)
(83.8
)
(84.1
)
Transfers within Property, plant and equipment
(15.3
)
41.3

(26.0
)

Transfers from Exploration and evaluation assets1
482.3



482.3

Balance, December 31, 2018
$
515.1

$
2,719.3

$
1,920.2

$
5,154.6

 
Construction
in progress
Mining
properties
Plant and
equipment
Total
Accumulated Depreciation and Impairment
 
 
 
 
Balance, January 1, 2017
$

$
1,481.5

$
876.5

$
2,358.0

Depreciation expense2

111.8

173.9

285.7

Disposals


(28.1
)
(28.1
)
Reversal of impairment charge3

(124.1
)

(124.1
)
Balance, December 31, 2017

1,469.2

1,022.3

2,491.5

Depreciation expense2

140.4

161.7

302.1

Disposals


(75.1
)
(75.1
)
Balance, December 31, 2018
$

$
1,609.6

$
1,108.9

$
2,718.5

Carrying amount, December 31, 2017
$
7.1

$
1,016.9

$
916.2

$
1,940.2

Carrying amount, December 31, 2018
$
515.1

$
1,109.7

$
811.3

$
2,436.1

1
Refer to note 15.
2 Excludes depreciation expense related to Corporate assets, which is included in General and administrative expenses.
3
Refer to note 35.

In 2018, borrowing costs attributable to qualifying assets associated with the Essakane, Rosebel and Westwood mines capitalized totaled $21.9 million (2017 - $22.4 million) at a weighted average interest rate of 7.24% (2017 - 7.16%).
As at December 31, 2018, mining properties included capitalized stripping costs of $239.9 million (December 31, 2017 - $224.7 million). Stripping costs of $81.5 million were capitalized during 2018 (2017 - $57.3 million), and $66.3 million were depreciated during 2018 (2017 - $47.4 million).
As at December 31, 2018, the carrying amount of plant and equipment included $9.1 million (December 31, 2017 - $0.2 million) of equipment held under finance leases.
v3.10.0.1
EXPLORATION AND EVALUATION ASSETS
12 Months Ended
Dec. 31, 2018
Exploration For And Evaluation Of Mineral Resources [Abstract]  
EXPLORATION AND EVALUATION ASSETS
EXPLORATION AND EVALUATION ASSETS
 
Côté Gold Project
Saramacca Project
Diakha-Siribaya Gold Project
Other1
Total
Balance, January 1, 2017
$
154.9

$
10.0

$

$
4.3

$
169.2

Exploration and evaluation expenditures2
8.1

11.2


0.9

20.2

Acquired Exploration and evaluation assets

15.9

36.6


52.5

Reversal of impairment charge3
400.0




400.0

Sale of a 30% interest in the Côté Gold Project
(167.3
)



(167.3
)
Balance, December 31, 2017
395.7

37.1

36.6

5.2

474.6

Exploration and evaluation expenditures2
22.0

24.3


5.5

51.8

Acquired Exploration and evaluation assets

3.2



3.2

Transfers to Property, plant and equipment4
(417.7
)
(64.6
)


(482.3
)
Balance, December 31, 2018
$

$

$
36.6

$
10.7

$
47.3

1
Other exploration and evaluation expenditures for the year ended December 31, 2018, included an option payment to Vanstar Mining Resources Inc. for the Nelligan exploration Project of $1.7 million, in addition to $3.8 million in capitalized feasibility study costs relating to the Boto Gold Project.
2
For the year ended December 31, 2018, borrowing costs attributable to Exploration and evaluation assets totaling $4.8 million (December 31, 2017 - $1.9 million) were capitalized at a weighted average rate of 7.24% (2017 - 7.16%).
3
Refer to note 35.
4
During the fourth quarter of 2018, capitalized costs related to the Côté Gold Project and the Saramacca Project were transferred from Exploration and evaluation assets to Property, plant and equipment - Construction in progress (note 14).

As at December 31, 2018, Exploration and evaluation assets that consisted of the Côté Gold Project (carrying amount as at December 31, 2018 - $417.7 million; December 31, 2017 - $395.7 million), and the Saramacca Project (carrying amount as at December 31, 2018 - $64.6 million, December 31, 2017 - $37.1 million), had reached technical feasibility and commercial viability and were transferred to Property plant and equipment - Construction in progress. Impairment tests were performed for the Côté Gold Project and the Saramacca Project and resulted in no impairments. As at December 31, 2017, the Company recorded an impairment charge reversal of $400.0 million on the Exploration and evaluation assets of the Côté Gold Project as a result of the sale of a 30% interest to SMM (note 10).
On December 12, 2016, the Company finalized the agreement to acquire the rights to the Saramacca property. The purchase consideration included 3.125 million contingently issuable IAMGOLD common shares to be issued to the Government of Suriname in three approximately equal tranches in 12 month intervals (note 24). On November 27, 2017, the Company issued the first tranche of the 3.125 million contingently issuable IAMGOLD common shares to the Government of Suriname and retained the right to explore the Saramacca property. This equity issuance in 2017of 1.042 million IAMGOLD common shares was accounted for as an addition to Exploration and evaluation assets of $5.9 million based on the fair value of the IAMGOLD common shares on the date of the issuance.
On December 8, 2017, the Company amended the agreement with the Government of Suriname to include all National Instrument 43-101 ("NI 43-101") resource categories in the potential upward adjustment to the purchase price in addition to the indicated and measured resources. Based on the terms of the amended agreement and the most recent estimate of contained gold ounces of resources identified at the Saramacca property, the Company made a cash pre-payment of $5.0 million and accrued for an additional $5.0 million which was paid in 2018 to the Government of Suriname for the upward adjustment to the purchase price and accounted for the total upward adjustment to the purchase price of $10.0 million as an addition to Exploration and evaluation assets in 2017.
On November 29, 2018, the Company amended the agreement with the Government of Suriname such that the parties may substitute the issuance of the second tranche of shares with a cash payment. On December 11, 2018, a cash payment equivalent to the second tranche of 1.042 million IAMGOLD common shares was made to the Government of Suriname, at a price of $3.11 per share based on the volume weighted average price of the last 20 days, for a total payment of $3.2 million.
v3.10.0.1
OTHER NON-CURRENT ASSETS
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
OTHER NON-CURRENT ASSETS
OTHER NON-CURRENT ASSETS
 
Notes
December 31,
2018
December 31,
2017
Net loan receivable from related party
37
$
14.0

$
36.3

Marketable securities and warrants
22(a)
14.8

24.2

Advances for the purchase of capital equipment
 
33.4

19.9

Bond fund investments
22(a)
1.0

1.9

Royalty interests
 
5.6

5.6

Long-term prepayment1
 
4.9

4.9

Derivatives
22(a)

4.4

Other
 
4.8

5.5

 
 
$
78.5

$
102.7


1
On March 6, 2017, the Company signed an agreement with a third-party for the construction of a solar power plant to deliver power to the Essakane mine for a period of 15 years upon commissioning for active use. The solar power plant was commissioned for active use on June 1, 2018. A prepayment of $4.9 million was made in 2017 towards the purchase of power in connection with the agreement, and will be utilized as the power is delivered over the term of the agreement.
As at December 31, 2018, the allowance for doubtful non-current non-trade receivables from related parties was $46.9 million, (December 31, 2017 - $36.0 million).
v3.10.0.1
PROVISIONS
12 Months Ended
Dec. 31, 2018
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
PROVISIONS
PROVISIONS
 
Notes
December 31,
2018
December 31,
2017
Asset retirement obligations
 
$
327.6

$
292.8

Yatela loss provision1
13
13.2

15.1

Other
 
9.6

8.2

 
 
$
350.4

$
316.1

Current portion of provisions
 
$
9.0

$
17.1

Non-current provisions
 
341.4

299.0

 
 
$
350.4

$
316.1


1 During the year ended December 31, 2018, the Company spent $0.9 million (December 31, 2017 - $nil) to fund the Yatela closure plan. This was recognized as a reduction of the provision for Yatela as a result of the Company equity accounting for the investment.
(a)    Asset retirement obligations
The Company’s activities are subject to various laws and regulations regarding environmental restoration and closure for which the Company estimates future costs and recognizes a provision. These provisions may be revised on the basis of amendments to such laws and regulations and the availability of new information, such as changes in reserves corresponding to a change in the mine life, discount rates, changes in approved closure plans, changes in estimated costs of reclamation activities and acquisition or construction of a new mine. The Company makes a provision based on the best estimate of the future cost of rehabilitating mine sites and related production facilities on a discounted basis.
The following table presents the reconciliation of the provision for asset retirement obligations:
 
 
Years ended December 31,
 
Notes
2018
2017
Balance, beginning of the year
 
$
292.8

$
285.1

Revision of estimated cash flows and discount rates:
 


Capitalized in Property, plant and equipment
14
30.1

4.6

Changes in asset retirement obligations at closed sites
30
7.3

7.5

Sale of 30% interest in the Côté Gold Project
 

(0.3
)
Accretion expense
31
1.2

0.9

Disbursements
 
(4.0
)
(5.0
)
Other
 
0.2


Balance, end of the year
 
327.6

292.8

Less current portion
 
(7.8
)
(10.8
)
Non-current portion
 
$
319.8

$
282.0


As at December 31, 2018, the Company had letters of credit in the amount of $0.4 million to guarantee certain environmental indemnities (December 31, 2017 - $1.3 million). In addition, the Company had restricted cash of $23.9 million (December 31, 2017 - $19.5 million) to guarantee the environmental indemnities related to the Essakane mine and $nil (December 31, 2017 - $5.0 million) to guarantee the environmental indemnities related to the Rosebel mine (note 9).
As at December 31, 2018, the Company had uncollateralized surety bonds outstanding of C$134.6 million ($98.6 million; December 31, 2017 - C$127.2M ($101.6 million) to guarantee the environmental indemnities related to the Doyon division. The increase was primarily due to higher collateral requirements pursuant to a new closure plan for the Westwood mine, partially offset by lower collateral requirements for the Doyon mine pursuant to a new closure plan, both of which were approved by the Government of Quebec in the first quarter 2018 (note 20(c)).
As at December 31, 2018, the Company had uncollateralized surety bonds outstanding of C$47.9 million ($35.1 million; December 31, 2017 - C$nil) to guarantee the environmental indemnities of the Côté Gold Project. The collateral requirements for the Côté Gold Project are pursuant to a closure plan approved by the Government of Ontario in the fourth quarter 2018 (note 20(c)).
As at December 31, 2018, the schedule of estimated undiscounted future disbursements for rehabilitation was as follows:
 
C$1

$1

2019
$
10.7

$

2020
18.1


2021
14.7

0.3

2022
9.8


2023
8.4

1.9

2024 onwards
117.4

180.7

 
$
179.1

$
182.9

1
Disbursements in US$ relate to the Essakane and Rosebel mines, and C$ disbursements relate to the Doyon mine and other Canadian sites.
As at December 31, 2018, estimated undiscounted amounts of cash flows required to settle the obligations, expected timing of payments and the average real discount rates assumed in measuring the asset retirement obligations were as follows:
 
Undiscounted
Amounts Required
(C$)
Undiscounted
Amounts Required
($)
Expected Timing of Payments
Average Real Discount Rates
Rosebel mine
$

$
96.3

2019-2064
0.8
%
Essakane mine

86.6

2019-2031
0.7
%
Doyon mine
152.8


2019-2047
0.3
%
Other Canadian sites
26.3


2019-2118
0.2
%
 
$
179.1

$
182.9

 
 

(b)
Provisions for litigation claims and regulatory assessments
By their nature, contingencies will only be confirmed by the occurrence or non-occurrence of one or more uncertain future events. The assessment of contingencies inherently involves the exercise of significant judgments and estimates of the outcome of future events.
The Company operates in various countries and may be subject to assessments by the regulatory authorities in each of those countries, which can be complex and subject to interpretation. Assessments may relate to matters such as income and other taxes, duties and environmental matters. The Company exercises informed judgment to interpret the provisions of applicable laws and regulations as well as their application and administration by regulatory authorities to reasonably determine and pay the amounts due. From time to time, the Company may undergo a review by the regulatory authorities and in connection with such reviews, disputes may arise with respect to the Company’s interpretations about the amounts due and paid.
The Company is also subject to various litigation actions. Management assesses the potential outcome of litigation and regulatory assessments based on input from in-house counsel, outside legal advisors, and other subject matter experts. Accordingly, the Company establishes provisions for future disbursements considered probable.
As at December 31, 2018, the Company did not have any material provisions for litigation claims or regulatory assessments. Further, the Company does not believe claims or regulatory assessments, for which no provision has been recorded, will have a material impact on the financial position of the Company.
v3.10.0.1
OTHER LIABILITIES
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
OTHER LIABILITIES
OTHER LIABILITIES
 
Notes
December 31,
2018
December 31,
2017
Finance lease liabilities
 
$
9.3

$
0.2

Derivatives
22(a)
10.6


Other liabilities
10

2.9

 
 
$
19.9

$
3.1

Current portion of other liabilities
 
$
6.8

$
2.9

Non-current portion of other liabilities
 
13.1

0.2

 
 
$
19.9

$
3.1

v3.10.0.1
INCOME TAXES
12 Months Ended
Dec. 31, 2018
Income Taxes [Abstract]  
INCOME TAXES
INCOME TAXES    
The effective tax rates for the years ended December 31, 2018 and 2017 were 207.7% and 16.0%, respectively.
Income tax expenses/(recoveries) consisted of the following components:
 
Years ended December 31,
 
2018
2017
Current income taxes:
 
 
Canadian current income taxes
$
3.3

$
3.0

Foreign current income taxes
41.8

56.7

 
45.1

59.7

Deferred income taxes:


Canadian deferred income taxes - origination and reversal of temporary differences
(3.5
)
4.6

Foreign deferred income taxes - origination and reversal of temporary differences
(3.6
)
32.5

Changes in tax rates or imposition of new taxes

0.8

 
(7.1
)
37.9

Total income tax expense
$
38.0

$
97.6


The Company is subject to income tax in several jurisdictions, at various tax rates. A number of factors other than the current year tax rates affect the relationship between the income or losses in a jurisdiction for financial accounting reporting purposes and the income tax provision required to be recognized for those same reporting purposes.
These factors are illustrated below on all of the consolidated earnings before income taxes after applying a tax rate of 26.6%, reflecting the combined Canadian statutory corporate income tax rate which applies to the Company as a legal entity for the year ended December 31, 2018 (December 31, 2017 - 26.6%):
 
Years ended December 31,
 
2018
2017
Earnings before income taxes
$
18.3

$
608.1

Income tax provision - 26.6% (26.6% in 2017)
$
4.9

$
161.8

Increase (reduction) in income taxes resulting from:


Earnings in foreign jurisdictions subject to a different tax rate than 26.6%
(6.7
)
1.4

Permanent items that are not included in income / losses for tax purposes:


Non-deductible expenses
8.7

5.5

Income/(losses) not recognized for tax purposes
(1.2
)
(1.1
)
Tax provisions not based on legal entity income or losses for the year:


Provincial mining duty tax
(0.4
)
6.0

Non-resident withholding tax
2.2

2.6

Under/(over) tax provisions
1.6

6.0

Changes in tax rates

0.8

Other
0.1

(3.2
)
Other adjustments:


Unrecognized recoveries (expenses) in deferred tax provisions
30.1

(84.0
)
Foreign exchange related to deferred income taxes
(1.0
)
2.6

Other
(0.3
)
(0.8
)
Total income tax expense
$
38.0

$
97.6


The components that give rise to deferred income tax assets and liabilities are as follows:
 
December 31,
December 31,
 
2018
2017
Deferred income tax assets:
 
 
Non-capital losses
$
105.2

$
71.9

Asset retirement obligations
2.8

2.5

Other
31.2

28.5

 
139.2

102.9

Deferred income tax liabilities:


Property, plant and equipment
(273.5
)
(253.9
)
Royalty interests
(7.2
)
(8.0
)
Other intangible assets

(0.2
)
Mining duties
(22.6
)
(26.1
)
Marketable securities

(1.5
)
Inventory and Reserves
(21.5
)
(6.5
)
Other
(2.6
)
(4.9
)
 
(327.4
)
(301.1
)
Net deferred income tax liabilities
$
(188.2
)
$
(198.2
)
 
 
 
Classification:
 
 
Non-current assets
$

$

Non-current liabilities
$
(188.2
)
$
(198.2
)
 
$
(188.2
)
$
(198.2
)

Income tax expenses/(recoveries) related to OCI consisted of the following components:
 
Years ended December 31,
 
2018
2017
Unrealized change in fair value of marketable securities
$
(1.8
)
$
0.6

Hedges
(1.2
)
0.3

Total income taxes related to OCI
$
(3.0
)
$
0.9


Unrecognized Deferred Income Tax Assets
As at December 31, 2018, the Company did not recognize the benefit related to the deferred income tax assets for the related items in its consolidated financial statements, as management did not consider it probable that the Company would be able to realize the deferred income tax assets in the future.
Deferred income tax assets have not been recognized in respect of the following deductible temporary differences:
 
December 31,
December 31,
 
2018
2017
Non-capital losses
$
550.4

$
619.0

Net capital losses
72.5

82.9

Exploration and evaluation assets
497.8

306.4

Deduction for future mining duty taxes
22.6

26.1

Asset retirement obligations
163.1

157.5

Other deductible temporary differences
44.2

41.1

 
$
1,350.6

$
1,233.0


The net capital loss carry forwards are restricted in use against capital gains but may be carried forward indefinitely. The exploration and evaluation assets may be carried forward indefinitely. At December 31, 2018, the non-capital loss carry forwards expire as follows:
Expiry Date
2019
2020
2021
2022
2023+
No Expiry
Total
Total unrecognized losses
$1.6
$0.7
$1.1
$1.9
$432.8
$112.3
$550.4

The Company has not recognized a deferred income tax liability on temporary differences of $719.3 million (December 31, 2017 - $794.2 million) related to investments in certain subsidiaries and joint ventures because the Company can control the reversal of the temporary differences and the temporary differences are not expected to reverse in the foreseeable future.

The Company designates all dividends paid to its shareholders to be eligible dividends.
The 2018 movement for net deferred income tax liabilities is summarized as follows:
 
December 31, 2017
Statements
of earnings
Other comprehensive income
Other
December 31, 2018
Deferred income tax assets:
 
 
 
 
 
Non-capital losses
$
71.9

$
33.3

$

$

$
105.2

Asset retirement obligations
2.5

0.3



2.8

Other assets
28.5

1.5

1.2


31.2

Deferred income tax liabilities:
 
 
 
 
 
Property, plant and equipment
(253.9
)
(19.6
)


(273.5
)
Royalty interests
(8.0
)
0.8



(7.2
)
Other intangible assets
(0.2
)
0.2




Mining duties
(26.1
)
3.5



(22.6
)
Marketable securities
(1.5
)
(0.3
)
1.8



Inventories and Reserves
(6.5
)
(15.0
)


(21.5
)
Other
(4.9
)
2.4


(0.1
)
(2.6
)
 
$
(198.2
)
$
7.1

$
3.0

$
(0.1
)
$
(188.2
)
The 2017 movement for net deferred income tax liabilities is summarized as follows:
 
December 31, 2016
Statements
of earnings
Other comprehensive income
Other
December 31, 2017
Deferred income tax assets:
 
 
 
 
 
Exploration and evaluation assets
$
109.1

$
(109.1
)
$

$

$

Non-capital losses

71.9



71.9

Asset retirement obligations
3.7

(1.2
)


2.5

Other assets
10.3

18.2



28.5

Deferred income tax liabilities:





Property, plant and equipment
(213.6
)
(40.3
)


(253.9
)
Royalty interests
(7.7
)
(0.3
)


(8.0
)
Other intangible assets
(0.5
)
0.3



(0.2
)
Mining duties
(19.7
)
(6.4
)


(26.1
)
Marketable securities
(0.9
)

(0.6
)

(1.5
)
Inventories and Reserves
(10.1
)
3.6



(6.5
)
Other
(29.6
)
25.4

(0.3
)
(0.4
)
(4.9
)
 
$
(159.0
)
$
(37.9
)
$
(0.9
)
$
(0.4
)
$
(198.2
)
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES
12 Months Ended
Dec. 31, 2018
Financial Instruments [Abstract]  
LONG-TERM DEBT AND CREDIT FACILITIES
LONG-TERM DEBT AND CREDIT FACILITY
(a)
Senior Notes
i.7% Senior Notes ("Notes")
On March 16, 2017, the Company issued at face value $400 million of Notes due in 2025 with an interest rate of 7% per annum. The Notes are denominated in U.S. dollars and mature on April 15, 2025. Interest is payable in arrears in equal semi-annual installments on April 15 and October 15 of each year, beginning on October 15, 2017. The Notes are guaranteed by some of the Company's subsidiaries.
The Company incurred transaction costs of $6.4 million which have been capitalized and offset against the carrying amount of the Notes within Long-term debt in the Consolidated balance sheets and are being amortized using the effective interest rate method.
Prior to April 15, 2020, the Company may redeem some or all of the Notes at a price equal to 100% of the principal amount of the Notes plus a "make-whole" premium, plus accrued and unpaid interest. On and after April 15, 2020, the Company may redeem the Notes, in whole or in part, at the relevant redemption price (expressed as a percentage of the principal amount of the Notes) and accrued and unpaid interest on the Notes up to the redemption date. The redemption price for the Notes during the 12-month period beginning on April 15 of each of the following years is: 2020 - 105.25%; 2021 - 103.50%; 2022 - 101.75%; 2023 and thereafter - 100%.
Prior to April 15, 2020, using the cash proceeds from an equity offering, the Company may redeem up to 40% of the original aggregate principal amount of the Notes at a redemption price equal to 107% of the aggregate principal amount thereof, plus accrued and unpaid interest, if any, up to the redemption date.
The prepayment options are options that represent an embedded derivative asset to the Company and are presented as an offset to the Notes on the Consolidated balance sheets. The debt component was initially recognized at $400 million, which represents the difference between the fair value of the financial instrument as a whole and the fair value of the embedded derivative.
Subsequently, the debt component is recognized at amortized cost using the effective interest rate method. The embedded derivative represents the prepayment option and is classified as a financial asset at fair value through profit or loss ("FVTPL"). The embedded derivative is recognized at fair value with changes in the fair value recognized in the Company’s Consolidated statements of earnings. The fair value of the embedded derivative as at December 31, 2018 was $0.7 million (note 22(a)), (December 31, 2017 - $6.8 million).
Under the indenture governing the Notes‎, if the Company makes certain asset sales it may use an amount equal to the net proceeds to repay certain debt obligations and/or reinvest, or commit to reinvest, in the Company’s business, within 365 days after the applicable asset sale.  At the end of the 365-day period, if there remains $50 million or more of the net proceeds that the Company has not used in this manner, the Company would be required to use any such excess proceeds to offer to purchase the Notes at par in the manner described in the indenture.


The following are the contractual maturities related to the Notes, including interest payments:
 
Payments due by period
Notes balance as at
Carrying amount1
Contractual cash flows
<1 yr
1-2 yrs
3-5 yrs
>5 yrs
December 31, 2018
$
400.0

$
582.0

$
28.0

$
56.0

$
56.0

$
442.0

December 31, 2017
$
400.0

$
610.0

$
28.0

$
56.0

$
56.0

$
470.0

1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of the Notes of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million). The carrying amount of the long-term debt also excludes the embedded derivative.
ii.6.75% Senior Notes    
On September 21, 2012, the Company issued at face value $650 million of Senior Notes with an interest rate of 6.75% per annum. The 6.75% Senior Notes were denominated in U.S. dollars and were to mature on October 1, 2020. Interest was payable in arrears in equal semi-annual installments on April 1 and October 1.
On March 16, 2017, the Company issued a notice to redeem its 6.75% Senior Notes for a total amount of $505.6 million and completed the redemption on April 3, 2017. As a result of the change in the estimated future cash flows, the amortized cost of $485.4 million of the 6.75% Senior Notes was adjusted during 2017 to reflect the actual future cash flows of $505.6 million. The resulting loss of $20.2 million was recognized in 2017 in Interest income, derivatives and other investment gains (losses) in the Consolidated statements of earnings (note 32).
(b)
Credit facility
On December 14, 2017, the Company amended and restated the $250 million credit facility, which was originally entered into on February 1, 2016. The amendments and restatements included, amongst other things, extending the maturity to March 31, 2022, improved pricing, the addition of an option to increase financing under the credit facility by $100 million, the ability to enter into a $100 million bi-lateral letters of credit facility and the elimination of the Minimum Liquidity financial covenant. The credit facility provides for an interest rate margin above London Interbank Offered Rate (“LIBOR”), banker’s acceptance (“BA”) prime rate and base rate advances which varies according to the total net debt ratio of the Company. Fees related to the credit facility vary according to the total net debt ratio of the Company. This credit facility is secured by some of the Company's real assets, guarantees by some of the Company’s subsidiaries and pledges of shares in some of the Company's subsidiaries. The key terms of the facility include limitations on incremental debt, restrictions on distributions and financial covenants including Net Debt to Earnings Before Interest, Taxes, Depreciation and Amortization ("EBITDA"), Tangible Net Worth, and Interest Coverage.
On November 15, 2018, the Company amended its $250 million credit facility. These amendments included, amongst other things, increasing the credit facility to $500 million, extending the maturity to January 31, 2023, an option to increase commitments by $100 million, the ability to enter into leases of up to $250 million, the ability to enter into gold prepaid transaction(s) of no more than 225,000 ounces, and charges to the financial covenants including the elimination of the Minimum Tangible Net Worth covenant. The Company was in compliance with its credit facility covenants as at December 31, 2018.
As of December 31, 2018, letters of credit worth $0.4 million were drawn against the credit facility for the guarantee of certain environmental indemnities (December 31, 2017 - $1.3 million) (note 17(a)).
(c)
Uncollateralized surety bonds
As at December 31, 2018, C$182.5 million (December 31, 2018 - $133.7 million; December 31, 2017 ‐ C$127.2 million, $101.6 million) of uncollateralized surety bonds were outstanding to guarantee the environmental indemnities related to the Doyon division and the Côté Gold Project (note 17(a)).  The uncollateralized surety bonds were issued pursuant to arrangements with international insurance companies.
v3.10.0.1
FINANCIAL INSTRUMENTS
12 Months Ended
Dec. 31, 2018
Financial Instruments [Abstract]  
FINANCIAL INSTRUMENTS
FINANCIAL INSTRUMENTS
(a)Risks
The Company is subject to various financial risks that could have a significant impact on profitability, levels of operating cash flow and financial conditions. Ongoing financial market conditions may have an impact on interest rates, gold prices and currency rates.
The Company is exposed to various liquidity, credit and market risks associated with its financial instruments, and manages those risks as follows:
(i)
Liquidity risk
Liquidity risk is the risk that an entity will encounter difficulty in meeting obligations associated with financial liabilities that are settled by delivering cash or another financial asset.
The Company’s approach to managing this risk is to ensure that there is sufficient liquidity to meet its liabilities when due, under both normal and stressed conditions, without incurring unacceptable losses or risking damages.
As at December 31, 2018, in addition to the available credit facility (Note 20(b)), the Company’s cash and cash equivalents and short-term investments balance was $734.1 million (December 31, 2017 - $791.3 million). As at December 31, 2018, the Company had accounts payable of $196.0 million (December 31, 2017 - $196.2 million), other current liabilities of $6.8 million (December 31, 2017 - $2.9 million), and Senior Notes payable of $398.5 million (December 31, 2017 - $391.6 million).
The Company has a treasury policy designed to support management of liquidity risk as follows:
Invest in financial instruments in order to preserve capital, maintain required liquidity and realize a competitive rate of return while considering an appropriate and tolerable level of credit risk;
Evaluate, review and monitor on a periodic basis, credit ratings and limits for counterparties with whom funds are invested;
Monitor cash balances within each operating entity;
Perform short to medium-term cash flow forecasting, as well as medium and long-term forecasting incorporating relevant budget information; and
Determine market risks inherent in the business, including currency, fuel and other non-gold commodities and evaluate, implement and monitor hedging strategies through the use of derivative instruments.
Under the terms of the Company’s derivative agreements, counterparties cannot require the immediate settlement of outstanding derivatives, except upon the occurrence of customary events of default such as covenant breaches, including financial covenants, insolvency or bankruptcy. The Company generally mitigates liquidity risk associated with these instruments by spreading out the maturity of its derivatives over time.
(ii)
Credit risk
Credit risk is the risk that one party to a financial instrument will cause a financial loss for the other party by failing to discharge an obligation. The maximum amount of credit risk is equal to the balance of cash and cash equivalents, receivables, short-term investments, derivative assets and restricted cash. Where applicable, the measurement of the fair value of derivatives accounts for counterparty credit risk.
The Company holds cash and cash equivalents, short-term investments and restricted cash in credit worthy financial institutions that comply with the Company’s investment policy and its credit risk parameters.
For derivatives, the Company mitigates credit risk by entering into derivatives with high quality counterparties, limiting the exposure per counterparty, and monitoring the financial condition of the counterparties.
Credit risk related to gold receivables is considered minimal as gold is sold to creditworthy counterparties and settled promptly, usually within the following month.
Credit risk is also related to receivables from related parties and governments. The receivables from governments primarily relate to value added tax. The Company has rights to these receivables based on application of tax laws and regularly monitors collection of the amounts. Receivables from related parties relate to the Company's investments in its associate and joint ventures and the Company monitors collection in line with the terms of the underlying agreements.
(iii)
Market risk
Market risk is the risk that the fair value or future cash flows of a financial instrument will fluctuate because of changes in market prices. For hedging activities, it is the risk that the fair value of a derivative might be adversely affected by a change in underlying commodity prices or currency exchange rates, and that this in turn affects the Company’s financial condition.
The Company mitigates market risk by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken, establishing trading agreements with counterparties under which there are no requirement to post any collateral or make any margin calls on derivatives. Counterparties cannot require settlement solely because of an adverse change in the fair value of a derivative. Market risk comprises the following types of risks: share and commodity market price risk, currency risk, and interest rate risk.
(b)Financial assets measured at fair value through other comprehensive income
Marketable securities fair value reserve
Share market price exposure risk is related to the fluctuation in the market price of marketable securities. The Company’s portfolio of marketable securities is not part of its core operations, and accordingly, gains and losses from these marketable securities are not representative of the Company’s performance during the period. Consequently, the Company has designated all of its investments in marketable securities to be measured at fair value through Other comprehensive income ("OCI"). The Company’s portfolio of marketable securities is primarily focused on the mining sector and relates entirely to investments in equity securities.
 
Years ended December 31,
 
2018
2017
Proceeds from sale of marketable securities
$
0.9

$
14.5

Acquisition date fair value of marketable securities sold
(1.3
)
(25.4
)
Loss on sale of marketable securities recorded in OCI
$
(0.4
)
$
(10.9
)

(c)Cash flow hedge fair value reserve
(i)
Hedge gain/loss
 
Gain (loss) recognized in cash flow hedge reserve
(Gain) loss reclassified or adjusted from cash flow hedge reserve
 
Year ended December 31, 2018
Year ended December 31, 2017
Year ended December 31, 2018
Year ended December 31, 2017
 
Exchange rate risk
 
 
 
 
Canadian dollar forward contracts
$
(0.6
)
$

$

$

Canadian dollar option contracts
(3.6
)
6.8

(1.4
)
(2.5
)
Euro option contracts
(1.2
)
6.5

(2.6
)
(2.3
)
Crude oil option contracts
4.3

3.2

(8.0
)
(0.3
)
 
(1.1
)
16.5

(12.0
)
(5.1
)
Time value of option contracts excluded from hedge relationship
(15.8
)
(1.9
)


 
$
(16.9
)
$
14.6

$
(12.0
)
$
(5.1
)

 
Gain reclassified or adjusted from cash flow hedge reserve to:
 
Year ended December 31, 2018
Year ended December 31, 2017
 
Consolidated balance sheets
 
 
Property, plant and equipment
$
(1.1
)
$
(1.1
)
Consolidated statements of earnings


 
Cost of sales
(10.5
)
(3.3
)
General and administrative expenses
(0.4
)
(0.7
)
Total
$
(12.0
)
$
(5.1
)

There was no hedge ineffectiveness for the years ended December 31, 2018 and 2017.
(ii)
Currency exchange rate risk
Movements in the Canadian dollar (C$) and the euro (€) against the U.S. dollar ($) have a direct impact on the Company’s consolidated financial statements.
The Company manages its exposure to the Canadian dollar and the euro by executing option and forward contracts. The Company’s objective is to hedge its exposure to these currencies resulting from operating and capital expenditure requirements at some of its mine sites and corporate offices.
The Company has designated option and forward contracts as cash flow hedges for its highly probable forecasted Canadian dollar and euro expenditure requirements. The Company has elected to only designate the change in the intrinsic value of options in the hedging relationships. The change in fair value of the time value component of options is recorded in OCI as a cost of hedging.
As at December 31, 2018, the Company's outstanding derivative contracts which qualified for hedge accounting, and the periods in which the cash flows are expected to occur and impact the Consolidated statements of earnings and Property, plant and equipment balance are as follows:
 
2019

2020

Total

Cash flow hedges
 
 
 
Exchange rate risk
 
 
 
   Canadian dollar option contracts (millions of C$)
282

186

468

   Rate range ($/C$)1
1.25-1.39

1.30-1.36

 
   Euro option contracts (millions of €)
96


96

Rate range (€/$)2
1.13-1.20


 
1
The Company executed Canadian dollar collar options, which consist of Canadian dollar call and put options. The strike prices for the call options are C$1.25 and C$1.30. The strike prices for the put options are C$1.39 and C$1.36. The Company will recognize a gain from the difference between a lower market price and the Canadian dollar call strike price. The Company will incur a loss from the difference between a higher market price and the Canadian dollar put strike price.
2
The Company executed euro collar options, which consist of euro put and call options. The strike price for the put options is €1.13. The strike price for the call options is €1.20. The Company will incur a loss from the difference between a lower market price and the euro put strike price. The Company will recognize a gain from the difference between a higher market price and the euro call strike price.
The table below sets out the fair value as at December 31, 2018, and what the fair value would have been based on an increase or decrease of 10% in the U.S. dollar exchange rate. The entire change in fair value would be recorded in the Consolidated statements of comprehensive income as Other comprehensive income.
 
December 31,
2018
Increase of 10%
Decrease of 10%
Canadian dollar (C$)
$
(5.1
)
$
(31.7
)
$
24.5

Euro (€)
$
(0.2
)
$
9.0

$
(7.8
)

Additional information on hedging instruments and hedged forecast transactions related to currency exchange rate risk as at December 31, 2018 and December 31, 2017 is as follows:
 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2018
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Canadian dollar option contracts
$

$
(4.5
)
$
(0.5
)
$
(0.5
)
$
0.5

Canadian forward contracts

(0.6
)
(0.6
)
(0.6
)
0.6

Euro option contracts

(0.2
)



 
$

$
(5.3
)
$
(1.1
)
$
(1.1
)
$
1.1

 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2017
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged
items
Canadian option contracts
$
5.3

$

$
4.5

$
4.5

$
(4.5
)
Euro option contracts
4.4


3.8

3.8

(3.8
)
 
$
9.7

$

$
8.3

$
8.3

$
(8.3
)

(iii)
Oil and fuel market price risk
Low sulfur diesel and fuel oil are key inputs to extract tonnage and, in some cases, to wholly or partially power operations. Brent crude oil and West Texas Intermediate ("WTI") crude oil are components of diesel and fuel oil, respectively, such that changes in the price of crude oil directly impacts diesel and fuel oil costs. The Company established a hedging strategy to limit the impact of fluctuations in crude oil prices and to economically hedge future consumption of diesel and fuel oil at the Rosebel and Essakane mines. The Company has designated option contracts as cash flow hedges for the crude oil component of its highly probable forecasted low sulfur diesel and fuel oil purchases.
As at December 31, 2018, the Company’s outstanding crude oil derivative contracts, which qualified for hedge accounting, and the periods in which the cash flows are expected to occur and impact the Consolidated statements of earnings, are as follows:
 
2019

2020

2021

2022

2023

Total

Brent crude oil option contracts (barrels)1
654

573

588

420


2,235

Option contracts with strike prices at ($/barrel)2
44-65

50-65

54-65

53-65


 
WTI crude oil option contracts (barrels)1
498

489

456

348

348

2,139

Option contracts with strike prices at ($/barrel)2
40-60

43-60

46-62

45-62

47-60

 
1
Quantities of barrels are in thousands.
2
The Company executed Brent and WTI collar options, which consist of Brent and WTI put and call options with strike prices within the given range in 2019 through 2023. The Company will incur a loss from the difference between a lower market price and the put strike price. The Company will recognize a gain from the difference between a higher market price and the call strike price.
The table below sets out the fair value as at December 31, 2018, and what the fair value would have been based on an increase or a decrease of 10% of the price. The entire change in fair value would be recorded in the Consolidated statements of comprehensive income as Other comprehensive income.
 
December 31,
2018
Increase of 10%
Decrease of 10%
Brent crude oil option contracts
$
(2.5
)
$
4.3

$
(9.6
)
WTI crude oil option contracts
$
(2.7
)
$
7.2

$
(12.1
)

Additional information on hedging instruments and hedged forecast transactions related to oil and fuel market price risk as at December 31, 2018 and December 31, 2017 was as follows:
 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2018
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Brent crude oil option contracts
$
0.1

$
(2.6
)
$
(1.0
)
$
(1.0
)
$
1.0

WTI crude oil option contracts

(2.7
)



 
$
0.1

$
(5.3
)
$
(1.0
)
$
(1.0
)
$
1.0

 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2017
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Brent crude oil option contracts
$
6.1

$

$
2.7

$
2.7

$
(2.7
)
WTI crude oil option contracts
2.7


0.1

0.1

(0.1
)
 
$
8.8

$

$
2.8

$
2.8

$
(2.8
)

(d)Gain (loss) on non-hedge derivatives and warrants
Gains and losses on non-hedge derivatives, including embedded derivatives and warrants are included in Interest income, derivatives and other investment gains (losses) (note 32) in the Consolidated statement of earnings.
These gains and losses relate to the Company's fair value movements of the embedded derivative related to prepayment options for the Notes (note 22(a)), and warrants associated with investments in marketable securities.
 
 
Years ended December 31,
 
Notes
2018
2017
Embedded derivative
20(a)
$
(6.1
)
$
2.6

Warrants
 
(3.0
)
0.5

 
32
$
(9.1
)
$
3.1

v3.10.0.1
FAIR VALUE MEASUREMENTS
12 Months Ended
Dec. 31, 2018
Fair Value Measurement [Abstract]  
FAIR VALUE MEASUREMENTS
FAIR VALUE MEASUREMENTS
The fair value hierarchy categorizes into three levels the inputs to valuation techniques used to measure fair value. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1 inputs) and the lowest priority to unobservable inputs (Level 3 inputs).
Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities which the entity can access at the measurement date.
Level 2 inputs are inputs other than quoted prices included within Level 1 which are observable for the asset or liability, either directly or indirectly such as those derived from prices.
Level 3 inputs are unobservable inputs for the asset or liability.
There have been no changes in the classification of the financial instruments in the fair value hierarchy since December 31, 2017.
(a)
Financial assets and liabilities measured at fair value on a recurring basis
The Company’s fair values of financial assets and liabilities were as follows:
 
December 31, 2018
 
Carrying Amount
Level 1
Level 2
Level 3
Total Fair Value
Assets
 
 
 
 
 
Cash and cash equivalents
$
615.1

$
615.1

$

$

$
615.1

Short-term investments
119.0

119.0



119.0

Restricted cash
23.9

23.9



23.9

Marketable securities and warrants
15.3

6.9

2.4

6.0

15.3

Bond fund investments
1.0

1.0



1.0

Derivatives
 
 
 
 
 
Crude oil contracts
0.1


0.1


0.1

Embedded derivative
0.7


0.7


0.7

 
$
775.1

$
765.9

$
3.2

$
6.0

$
775.1

Liabilities
 
 
 
 
 
Derivatives
 
 
 
 
 
Currency contracts
$
(5.3
)
$

$
(5.3
)
$

$
(5.3
)
Crude oil contracts
(5.3
)

(5.3
)

(5.3
)
Long-term debt - 7% Senior Notes1
(400.0
)
(381.2
)


(381.2
)
 
$
(410.6
)
$
(381.2
)
$
(10.6
)
$

$
(391.8
)
 
 
December 31, 2017
 
Carrying Amount
Level 1
Level 2
Level 3
Total Fair Value
Assets
 
 
 
 
 
Cash and cash equivalents
$
664.1

$
664.1

$

$

$
664.1

Restricted cash
24.5

24.5



24.5

Short-term investments
127.2

127.2



127.2

Marketable securities and warrants
24.2

18.8

5.4


24.2

Bond fund investments
1.9

1.9



1.9

Derivatives
 
 
 
 
 
Currency contracts
9.7


9.7


9.7

Crude oil contracts
8.8


8.8


8.8

Embedded derivative
6.8


6.8


6.8

 
$
867.2

$
836.5

$
30.7

$

$
867.2

Liabilities
 
 
 
 
 
Long-term debt - 7% Senior Notes1
$
(400.0
)
$
(413.9
)
$

$

$
(413.9
)
1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of the Notes of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million). The carrying amount of the long-term debt also excludes the embedded derivative.

(b)
Valuation techniques
Cash, cash equivalents, short-term investments and restricted cash
Cash, cash equivalents, short-term investments and restricted cash are included in Level 1 due to the short-term maturity of these financial assets.
Marketable securities and warrants
The fair value of marketable securities included in Level 1 is determined based on a market approach. The closing price is a quoted market price from the exchange market which is the principal active market for the particular security. The fair value of warrants included in Level 2 is obtained through the use of Black-Scholes pricing model, which uses share price inputs and volatility measurements. The fair value of investments in equity instruments which are not actively traded is determined using valuation techniques which require inputs that are both unobservable and significant, and therefore were categorized as Level 3 in the fair value hierarchy. The Company uses the latest market transaction price for these securities, obtained from the entity, to value these marketable securities.
Marketable securities included in level 3
 
Balance, December 31, 2017
$

Shares received
6.0

Change in fair value reported in Other comprehensive income, net of income taxes

Balance, December 31, 2018
$
6.0


Bond fund investments
The fair value of bond fund investments included in Level 1 is measured using quoted prices (unadjusted) in active markets.
Derivatives
For derivative contracts, the Company obtains a valuation of the contracts from counterparties of those contracts. The Company assesses the reasonableness of these valuations through internal methods and third-party valuations. The Company then calculates a credit valuation adjustment to reflect the counterparty’s or the Company’s own default risk. Valuations are based on market valuations considering interest rate and volatility, taking into account the credit risk of the financial instrument. Valuations of derivative contracts are therefore classified within Level 2 of the fair value hierarchy.
Embedded derivative
The fair value of the embedded derivative as at December 31, 2018 was $0.7 million and is accounted for at FVTPL. The valuation is based on the discounted cash flows at the risk-free rate to determine the present value of the prepayment option. Key inputs used in the valuation include the credit spread, volatility parameter and the risk-free rate curve. Valuation of the prepayment option is therefore classified within Level 2 of the fair value hierarchy.
Senior Notes
The fair value of Senior Notes required to be disclosed is determined using quoted prices (unadjusted) in active markets, and is therefore classified within Level 1 of the fair value hierarchy. The fair value of the Senior Notes as at December 31, 2018 was $381.2 million (December 31, 2017 - $413.9 million).
Other financial assets and liabilities
The fair value of all other financial assets and liabilities of the Company approximate their carrying amounts.
v3.10.0.1
CAPITAL MANAGEMENT
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
CAPITAL MANAGEMENT
CAPITAL MANAGEMENT
IAMGOLD’s objectives when managing capital are to:
Ensure the Company has sufficient financial capacity to support its operations, current mine development plans, and long-term growth strategy;
Ensure the Company complies with its long-term debt covenants; and
Protect the Company’s value with respect to market and risk fluctuations.
 
Notes
December 31, 2018
December 31, 2017
Cash and cash equivalents
7
$
615.1

$
664.1

Short-term investments
8
119.0

127.2

 
 
$
734.1

$
791.3

Capital items:
 



Credit facility available for use
20(b)
$
499.6

$
248.7

Long-term debt1
20(a)
400.0

400.0

Common shares
 
2,680.1

2,677.8

 
 
$
3,579.7

$
3,326.5

1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million).
The Company is in a capital intensive industry that experiences lengthy development lead times as well as risks associated with capital costs and timing of project completion. Factors affecting these risks, which are beyond the Company’s control, include the availability of resources, the issuance of necessary permits, costs of various inputs and the volatility of the gold price.
The adequacy of the Company’s capital structure is assessed on an ongoing basis and adjusted as necessary after taking into consideration the Company’s strategy, the forward gold price, the mining industry, economic conditions and associated risks. In order to maintain or adjust its capital structure, the Company may adjust its capital spending, adjust the amount of dividend distributions, issue new shares, purchase shares for cancellation pursuant to normal course issuer bids, extend its credit facility, issue new debt, repay existing debt, purchase or sell gold bullion or enter into forward gold sale arrangements.
The Senior Notes indenture contains a restriction on the use of proceeds from the sale of certain assets. Refer to note 20(a).
v3.10.0.1
SHARE CAPITAL
12 Months Ended
Dec. 31, 2018
Share Capital, Reserves And Other Equity Interest [Abstract]  
SHARE CAPITAL
SHARE CAPITAL
The Company is authorized to issue an unlimited number of common shares, first preference shares issuable in series and second preference shares issuable in series.
 
Years ended December 31,
Number of common shares (in millions)
2018
2017
Outstanding, beginning of the year
465.9

453.8

Equity issuance

7.9

Issuance of flow-through common shares

3.4

Issuance of shares for share-based compensation
0.9

0.8

Outstanding, end of the year
466.8

465.9


Flow-through common shares
There was no issuance of flow-through common shares in 2018. In March 2017, the Company issued 3.4 million flow-through common shares at C$5.91 per share for net proceeds of $15.1 million (C$20.0 million), which included a $1.7 million premium reported as a deferred gain on the balance sheet to be recognized in earnings as eligible expenditures are made. A total of $13.4 million was recognized in equity based on the quoted price of the shares on the date of the issue less issuance costs. The flow-through common shares were issued to fund prescribed development expenditures on the Westwood mine. Flow-through common shares require the Company to incur an amount equivalent to the proceeds of the issue on prescribed expenditures in accordance with the applicable tax legislation. As at December 31, 2018 and 2017, there was no remaining unspent amount.
As the premiums related to the March 2017 issuance of flow-through common shares were fully amortized in 2017, $nil was recognized as amortization of the premiums related to the issuances of flow-through common shares for the year ended December 31, 2018 (December 31, 2017 - $3.6 million) (note 32).
Contingently issuable shares        
On December 12, 2016, the Company finalized the agreement with the Government of Suriname to acquire the rights to the Saramacca property. Under the terms of the agreement, the rights to the Saramacca property were transferred to Rosebel in exchange for an initial cash payment of $10.0 million which was accounted for as an Exploration and evaluation asset. The purchase consideration also included 3.125 million contingently issuable IAMGOLD common shares to be delivered in three approximately equal tranches in 12 month intervals, from the date the rights to the Saramacca property were transferred to Rosebel. In addition, the agreement provides for a potential upward adjustment to the purchase price based on the contained gold ounces identified at the Saramacca property in indicated and measured resource categories, within a certain Whittle shell, over the first 24 months, to a maximum of $10.0 million. Under the terms of the agreement, the Company can at any time during the course of the agreement provide 60 days' notice to the Government of Suriname and terminate the agreement. In such an event, any contingently issuable IAMGOLD common shares not already issued will no longer be required to be delivered to the Government of Suriname.
On November 27, 2017, the Company issued the first tranche of the 3.125 million contingently issuable IAMGOLD common shares to the Government of Suriname and retained the right to explore the Saramacca property. This equity issuance of 1.042 million IAMGOLD common shares was accounted for as an Exploration and evaluation asset of $5.9 million in the year ended December 31, 2017, based on the fair value of the IAMGOLD common shares on the date of the issuance.
On November 29, 2018, the Company amended the agreement with the Government of Suriname such that the parties may substitute the issuance of the second tranche of shares with a cash payment. On December 11, 2018, a cash payment equivalent to the second tranche of 1.042 million IAMGOLD common shares was made to the Government of Suriname, at a price of $3.11 per share based on the volume weighted average price of the last 20 days, for a total payment of $3.2 million.
v3.10.0.1
NON-CONTROLLING INTERESTS
12 Months Ended
Dec. 31, 2018
Noncontrolling Interest Disclosure [Abstract]  
NON-CONTROLLING INTERESTS
Subsidiaries, divisions and investments in joint ventures related to significant properties of the Company are accounted for as outlined below.
Name
Property
– Location
December 31,
2018
December 31,
2017
Type of
Arrangement
Accounting 
Method
Essakane S.A.
Essakane mine (Burkina Faso)
90%
90%
Subsidiary
Consolidation
Rosebel Gold Mines N.V.
Rosebel mine (Suriname)
95%
95%
Subsidiary
Consolidation
Doyon division including the Westwood mine
Doyon division (Canada)
100%
100%
Division
Consolidation
Côté Gold division 1
Côté Gold Project
(Canada)
70%
70%
Division
Proportionate share
Euro Ressources S.A.
France
90%
90%
Subsidiary
Consolidation
Société d'Exploitation des Mines d'Or de Sadiola S.A.
Sadiola mine
(Mali)
41%
41%
Incorporated joint venture
Equity accounting
Merrex Gold Inc.2
Diakha-Siribaya Gold Project (Mali)
100%
100%
Subsidiary
Consolidation
1 Effective June 20, 2017, the Company holds an undivided interest in the assets, liabilities, revenues and expenses of the Côté Gold division through an
unincorporated joint venture (note 10).
2 On February 28, 2017, the Company increased its ownership in Merrex from 23% to 100% (note 6).
NON-CONTROLLING INTERESTS    
Financial information of subsidiaries that have material non-controlling interests are provided below:
 
 
 
December 31, 2018
December 31, 2017
 
 
 
 Essakane
Rosebel
Essakane
Rosebel
Percentage of voting rights held by non-controlling interests
10%
5%
10%
5%
Accumulated non-controlling interest
$
30.3

$
25.3

$
25.5

$
25.9

Net earnings attributable to non-controlling interests
$
5.8

$
0.9

$
0.6

$
5.7

Dividends paid to non-controlling interests1
$
1.0

$
1.5

$
1.0

$
1.0

1
For the year ended December 31, 2018, dividends paid to other non-controlling interests amounted to $1.2 million (December 31, 2017 – $1.1 million).
Selected summarized information relating to these subsidiaries are provided below, before any intercompany eliminations:
 
 
 
December 31, 2018
December 31, 2017
 
 
 
Essakane
Rosebel
 Essakane
Rosebel
Current assets
$
245.1

$
172.8

$
220.5

$
181.0

Non-current assets
865.8

675.1

848.4

645.4

Current liabilities
(96.7
)
(68.4
)
(88.1
)
(72.4
)
Non-current liabilities
(543.5
)
(221.7
)
(552.6
)
(183.6
)
Net assets
$
470.7

$
557.8

$
428.2

$
570.4

 
 
 
Year ended
Year ended
 
 
 
December 31, 2018
December 31, 2017
Revenues
 
 
$
564.1

$
386.0

$
547.4

$
385.6

Net earnings and other comprehensive income
$
52.1

$
17.3

$
8.2

$
113.1

 
 









Net cash from operating activities
$
181.8

$
61.6

$
215.5

$
124.5

Net cash used in investing activities
(161.4
)
(67.9
)
(85.7
)
(63.1
)
Net cash used in financing activities
(45.2
)
(36.1
)
(127.7
)
(25.5
)
Net increase (decrease) in cash and cash equivalents
$
(24.8
)
$
(42.4
)
$
2.1

$
35.9


The Company’s ability to access or use the assets of Essakane and Rosebel to settle its liabilities is not significantly restricted by known current contractual or regulatory requirements, or from the protective rights of non-controlling interests. Dividends payable by Rosebel must be approved by the Rosebel Supervisory Board, which includes representation from the non-controlling interest.
v3.10.0.1
EARNINGS PER SHARE
12 Months Ended
Dec. 31, 2018
Earnings per share [abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE
Basic earnings (loss) per share computation
 
Years ended December 31,
 
2018
2017
Numerator
 
 
Net earnings (loss) attributable to equity holders of IAMGOLD
$
(28.2
)
$
501.6

Denominator (in millions)


Weighted average number of common shares (basic)
466.5

463.0

Basic earnings (loss) attributable to equity holders of IAMGOLD ($/share)
$
(0.06
)
$
1.08


Diluted earnings (loss) per share computation
 
Years ended December 31,
 
2018
2017
Denominator (in millions)
 
 
Weighted average number of common shares (basic)
466.5

463.0

Dilutive effect of share options

1.2

Dilutive effect of full value award units

3.3

Weighted average number of common shares (diluted)
466.5

467.5

Diluted earnings (loss) attributable to equity holders of IAMGOLD ($/share)
$
(0.06
)
$
1.07

Equity instruments excluded from the computation of diluted earnings per share, which could be dilutive in the future, were as follows:
 
 
Years ended December 31,
(in millions)
Notes
2018
2017
Share options
27(a)
7.1

2.4

Full value awards
27(b)
5.2


Contingently issuable shares
24
1.0

2.1

 
 
13.3

4.5

v3.10.0.1
SHARE-BASED COMPENSATION
12 Months Ended
Dec. 31, 2018
Share-Based Payment Arrangements [Abstract]  
SHARE-BASED COMPENSATION
SHARE-BASED COMPENSATION
 
Years ended December 31,
 
2018
2017
Share option award plan
$
2.3

$
2.0

Full value award plans
6.1

3.9

 
$
8.4

$
5.9


(a)Share option award plan
The Company has a comprehensive share option plan for its full-time employees, directors and officers. The options vest over four to five years and expire no later than seven years from the grant date.
The reserve for share options has a maximum allotment of 25,505,624 common shares. As of December 31, 2018, the total number of shares in reserve was 11,374,026 of which 7,086,441 were outstanding and 4,287,585 were unallocated.
 
Year ended
December 31, 2018
Year ended
December 31, 2017
 
Share
options
(in millions)

Weighted
average
exercise
price (C$/share)
1

Share
options
(in millions)

Weighted
average
exercise
price (C$/share)
1

Outstanding, beginning of the year
6.7

$
6.81

6.0

$
7.79

Granted
1.0

6.83

1.6

5.24

Exercised
(0.1
)
4.48

(0.2
)
4.23

Forfeited and expired
(0.5
)
17.08

(0.7
)
12.87

Outstanding, end of the year
7.1

$
6.15

6.7

$
6.81

Exercisable, end of the year
3.7

$
7.16

3.3

$
9.10

1
Exercise prices are denominated in Canadian dollars. The exchange rate at December 31, 2018 between the U.S. dollar and Canadian dollar was
$0.7329/C$.
The following table summarizes information related to share options outstanding at December 31, 2018:
Range of Prices
C$/share
Number
Outstanding
(millions)
Weighted Average Remaining Contractual Life (years)
Weighted Average Exercise Price
(C$/share)
1.01 - 5.00
2.7
3.2
$3.56
  5.01 - 10.00
3.6
4.2
6.41
10.01 - 15.00
0.8
0.3
13.17
 
7.1
3.4
$6.15

The following were the weighted average inputs to the Black-Scholes model used in determining the fair value of the options granted. The estimated fair value of the options is expensed over their expected life.

Years ended December 31,

2018
2017
Weighted average risk-free interest rate
2
%
1.1
%
Weighted average expected volatility1
65
%
66
%
Weighted average dividend yield
0.00
%
0.00
%
Weighted average expected life of options issued (years)
5.0

5.0

Weighted average grant-date fair value (C$ per share)
$
3.77

$
2.89

Weighted average share price at grant date (C$ per share)
$
6.83

$
5.24

Weighted average exercise price (C$ per share)
$
6.83

$
5.24

1
Expected volatility is estimated by considering historic average share price volatility based on the average expected life of the options.
(b)Full value award plans
(i) Full value award reserve
The Company has a reserve for deferred share units, restricted share units and performance share units for employees and directors with a maximum allotment of 13,756,762 common shares. As of December 31, 2018, the total number of shares in reserve was 10,355,715 of which 5,198,066 were outstanding and 5,157,649 were unallocated.
A summary of the status of the Company’s deferred share units and restricted share units issued to employees and directors under the full value award plan and changes during the year is presented below.
 
Years ended December 31,
(in millions)
2018
2017
Outstanding, beginning of the year
4.6

3.7

Granted
2.0

2.2

Issued
(0.8
)
(0.6
)
Forfeited
(0.6
)
(0.7
)
Outstanding, end of the year
5.2

4.6


(ii) Summary of awards granted
Deferred share units
Effective January 1, 2017, directors can elect to receive the equity portion of their annual retainer in the form of deferred share units or restricted share units. Deferred share units vest at the end of each year and are released upon a director leaving the Board. The deferred share units are equity settled and have no cash settlement alternatives. As the deferred share units are equity settled, the cost to the Company is based on the grant date fair value.
The following were the weighted average inputs to the Black-Scholes model used in determining the fair value of the deferred share units granted. The estimated fair value of the awards is expensed over their vesting period.
 
Years ended December 31,
 
2018
2017
Weighted average risk-free interest rate
1.7
%
0.7
%
Weighted average expected volatility1
44
%
76
%
Weighted average dividend yield
0.00
%
0.00
%
Weighted average expected life of deferred share units issued (years)
1.0

1.0

Weighted average grant-date fair value (C$ per share)
$
7.26

$
5.19

Weighted average share price at grant date (C$ per share)
$
7.26

$
5.19

1
Expected volatility is estimated by considering historic average share price volatility based on the average expected life of the units.
Restricted share units
Executive officers, directors and certain employees are granted restricted share units from the full value award reserve on an annual basis.
Employee restricted share unit grants vest over twelve to thirty-six months, have no restrictions upon vesting and are equity settled.  There are no cash settlement alternatives and no vesting conditions other than service.
Restricted share units are granted to employees based on performance objectives and criteria determined on an annual basis based on guidelines established by the Human Resources and Compensation Committee of the Board of Directors. The amount of shares granted is determined as part of the employees’ overall compensation.
The following were the weighted average inputs to the Black-Scholes model used in determining the fair value of the restricted share units granted. The estimated fair value of the awards is expensed over their vesting period.

Years ended December 31,

2018
2017
Weighted average risk-free interest rate
1.9
%
0.8
%
Weighted average expected volatility1
64
%
72
%
Weighted average dividend yield
0.00
%
0.00
%
Weighted average expected life of restricted share units issued (years)
3.0

2.9

Weighted average grant-date fair value (C$ per share)
$
6.76

$
5.24

Weighted average share price at grant date (C$ per share)
$
6.76

$
5.24

1
Expected volatility is estimated by considering historic average share price volatility based on the average expected life of the restricted share units.
(c)
Share purchase plan
The Company has a share purchase plan for employees with more than three months of continuous service. Participants determine their contribution as a whole percentage of their base salary from 1% to 10%. The Company matches 75% of the first 5% of employee contributions, to a maximum of 3.75% of the employee’s salary, towards the purchase of shares on the open market. No shares are issued from treasury under the share purchase plan. The Company’s contribution is expensed and is considered vested at the end of the day on December 31 of each calendar year.
v3.10.0.1
COST OF SALES
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
COST OF SALES
COST OF SALES
 
Years ended December 31,
 
2018
2017
Operating costs1
$
662.2

$
632.3

Royalties
46.5

44.3

Depreciation expense2
265.4

265.4

 
$
974.1

$
942.0

1
Operating costs include mine production, transport and smelter costs, and site administrative expenses.
2
Depreciation expense excludes depreciation related to Corporate assets, which is included in General and administrative expenses.
v3.10.0.1
GENERAL AND ADMINSTRATIVE EXPENSES
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
GENERAL AND ADMINISTRATIVE EXPENSES
GENERAL AND ADMINISTRATIVE EXPENSES
 
 
Years ended December 31,
 
Notes
2018
2017
Salaries
 
$
23.1

$
24.0

Director fees and expenses
 
0.9

1.0

Professional and consulting fees
 
5.6

5.8

Other administration costs
 
4.7

4.4

Share-based compensation
 
7.4

5.2

Gain on cash flow hedge
21(c)
(0.4
)
(0.7
)
Depreciation expense
 
0.8

0.6

 
 
$
42.1

$
40.3

v3.10.0.1
OTHER EXPENSES
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
OTHER EXPENSES
OTHER EXPENSES
 
 
Years ended December 31,
 
Notes
2018
2017
Changes in asset retirement obligations at closed sites
17(a)
$
7.3

$
7.5

Write-down of assets
 
9.2

2.5

Other
 
5.0

8.3

 
 
$
21.5

$
18.3

v3.10.0.1
FINANCE COSTS
12 Months Ended
Dec. 31, 2018
Borrowing costs [abstract]  
FINANCE COSTS
FINANCE COSTS
 
 
Years ended December 31,
 
Notes
2018
2017
Interest expense
 
$
2.7

$
7.1

Credit facility fees
 
4.9

2.9

Accretion expense
17(a)
1.2

0.9

 
 
$
8.8

$
10.9


Total interest paid during the year ended December 31, 2018 was $28.4 million (December 31, 2017 - $32.7 million). Interest paid relates to interest charges on notes, credit facilities and finance leases.
v3.10.0.1
INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES)
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES)
INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES)    
 
 
Years ended December 31,
 
Notes
2018
2017
Interest income
 
$
13.3

$
9.4

Gain (loss) on non-hedge derivatives and warrants
21(d)
(9.1
)
3.1

Gain on sale of a 30% interest in the Côté Gold Project
10

19.2

Amortization of gains related to flow-through common shares
24

3.6

Loss on redemption of 6.75% Senior Notes
20(a)

(20.2
)
Write-down of related party loan receivable
37
(10.9
)

Other gains
 
0.7

1.6

 
 
$
(6.0
)
$
16.7

v3.10.0.1
EXPENSES BY NATURE
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
EXPENSES BY NATURE
EXPENSES BY NATURE
The following employee benefits expenses are included in cost of sales, general and administrative expenses, and exploration expenses.
 
Years ended December 31,
 
2018
2017
Salaries, short-term incentives, and other benefits
$
210.2

$
208.7

Share-based compensation
8.0

5.5

Other
3.8

3.3

 
$
222.0

$
217.5

v3.10.0.1
CASH FLOW ITEMS
12 Months Ended
Dec. 31, 2018
Cash Flow Statement [Abstract]  
CASH FLOW ITEMS
CASH FLOW ITEMS                
(a)    Adjustments for other non-cash items within operating activities
 
 
Years ended December 31,
 
Notes
2018
2017
Share-based compensation
27
$
8.4

$
5.9

Effects of exchange rate fluctuation on restricted cash
 
0.3

(1.6
)
Amortization of gains related to flow-through common shares
32

(3.6
)
Changes in estimates of environmental indemnities at closed sites
30
7.3

7.5

Other
 
2.7

1.4

 
 
$
18.7

$
9.6


(b)
Movements in non-cash working capital items and non-current ore stockpiles
 
Years ended December 31,
 
2018
2017
Receivables and other current assets
$
(11.9
)
$
(1.8
)
Inventories and non-current ore stockpiles
(87.8
)
(21.3
)
Accounts payable and accrued liabilities
2.4

24.4

 
$
(97.3
)
$
1.3


(c)
Other investing activities
 
 
Years ended December 31,
 
Notes
2018
2017
Disposal (acquisition) of investments
 
$
(8.0
)
$
9.0

Advances to related parties
37
(1.2
)
(5.9
)
Repayments from related parties
37
12.6

1.0

Prepayment for other assets
 
(2.9
)

Other
 

0.3

 
 
$
0.5

$
4.4


(d) Reconciliation of long-term debt arising from financing activities     
 
Notes

2018
2017
Balance, beginning of the year
 
$
391.6

$
485.1

Net proceeds from issuance of 7% Senior Notes
20(a)

393.6

Non-cash changes:
 


 
     Amortization of deferred financing charges
 
0.8

0.9

     Change in fair value of embedded derivative
21(d)
6.1

(2.6
)
     Loss on redemption of 6.75% Senior Notes
20(a)

20.2

     Repayment of 6.75% Senior Notes
20(a)

(505.6
)
 Balance, end of the year
 
$
398.5

$
391.6

v3.10.0.1
REVERSAL OF IMPAIRMENT CHARGES
12 Months Ended
Dec. 31, 2018
Impairment Of Assets [Abstract]  
REVERSAL OF IMPAIRMENT CHARGES
REVERSAL OF IMPAIRMENT CHARGES     


Years ended December 31,

Notes
2018
2017
Suriname CGU1





Property, plant and equipment
14
$

$
124.1

Côté Gold Project





Exploration and evaluation assets
15

400.0



$

$
524.1

1 The Suriname CGU consists of Rosebel Gold Mines N.V. and Euro Resources S.A.
Property, plant and equipment        
On July 26, 2017 (effective June 30, 2017), the Company identified a significant increase in reserves and resources and corresponding extension of the life of mine ("LOM") for the Rosebel mine, which were considered to be an indicator of reversal of a previous impairment charge, as they represented a significant change in the key inputs used to determine the cash generating unit's ("CGU") recoverable amount. As a result, an assessment was performed for the Company’s Suriname CGU, and it was determined that the recoverable amount, representing the CGU’s fair value less cost of disposal ("FVLCD"), exceeded the carrying amount. This resulted in a reversal of the impairment charge recorded in 2013, which was limited to the carrying amount of the Suriname CGU that would have been determined had no impairment charge been recognized in prior years, net of depreciation charges. The pre-tax and after-tax amounts of impairment reversal recorded in the Company’s Consolidated statements of earnings in 2017 were $124.1 million and $79.9 million, respectively.
The significant estimates and assumptions used in determining the FVLCD for the CGU were LOM production profiles, future commodity prices, reserves and resources, discount rate, values of un-modeled mineralization and capital expenditures. The estimates of future cash flows were derived from the most recent LOM of approximately 11 years, which is based on Management’s current best estimates of optimized mine and processing plans, future operating costs and capital expenditures. For the assessment, the Company used an estimated gold price of $1,225 per ounce for the first 5 years starting 2018, decreasing to $1,200 per ounce for 2023 and beyond.
The future cash flows used to calculate the recoverable amount of the CGU were discounted using a real weighted average cost of capital of 6%, which reflects specific market risk factors. Un-modeled mineralization for the CGU was valued at $45 per ounce. Oil price is a component of cash costs of production and was estimated based on the current price, forward prices, forecasts of future prices from third-party sources and the Company’s hedging program.
As at December 31, 2018, the Company's impairment review indicated that the facts and circumstances did not represent an indication of potential impairment or reversal of previously recognized impairment. As a result, there were no impairment charges or reversals of previously recognized impairment recorded in the consolidated financial statements for the year ended December 31, 2018.
Exploration and evaluation assets
On June 5, 2017, upon entering into a definitive Investment Agreement with SMM for the sale of a 30% interest in the Côté Gold Project (note 10), the Company performed an assessment of whether the previous impairment charge on the Project was reversible. The Company determined that the consideration agreed to by SMM indicated the recoverable amount exceeded the carrying amount, which resulted in the reversal of the previously recorded impairment charge of $400 million. The reversal is limited to the carrying amount that would have been determined had no impairment charge been recognized in prior years.
At December 31, 2018, the Company's impairment review indicated that the facts and circumstances did not represent an indication of potential impairment. As a result, there were no impairment charges recorded in the consolidated financial statements for the year ended December 31, 2018.
v3.10.0.1
COMMITMENTS
12 Months Ended
Dec. 31, 2018
Commitments [Abstract]  
COMMITMENTS
COMMITMENTS         
 
December 31, 2018
December 31, 2017
Purchase obligations
$
110.2

$
76.4

Capital expenditure obligations
36.6

29.7

Finance lease obligations
9.8


Operating leases
16.3

17.5

 
$
172.9

$
123.6


(a)    Commitments – payments due by period
 
Payments due by period
As at December 31, 2018
Total
<1 yr
1-2 yrs
3-5 yrs
>5 yrs
Purchase obligations
$
110.2

$
107.2

$
2.0

$
0.8

$
0.2

Capital expenditure obligations
36.6

31.8

2.3

2.3

0.2

Finance lease obligations
9.8

2.4

4.9

2.5


Operating leases
16.3

6.5

8.2

0.6

1.0

 
$
172.9

$
147.9

$
17.4

$
6.2

$
1.4


(b)
Royalties included in cost of sales
Production from certain mining operations is subject to third party royalties (included in the Cost of sales) based on various methods of calculation summarized as follows:
 
December 31, 2018
December 31, 2017
Essakane1
$
25.0

$
22.3

Rosebel2
21.5

22.0

 
$
46.5

$
44.3

1
Royalty based on a percentage of gold sold applied to the gold market price the day before shipment; the royalty percentage varies according to the gold market price: 3% if the gold market price is lower or equal to $1,000 per ounce, 4% if the gold market price is between $1,000 and $1,300 per ounce, or 5% if the gold market price is above $1,300 per ounce.
2
2% in-kind royalty per ounce of gold production and price participation of 6.5% on the amount exceeding a market price of $425 per ounce when applicable, using for each calendar quarter the average market price determined by the London Gold Fix P.M. In addition, 0.25% of all minerals produced at Rosebel are payable to a charitable foundation for the purpose of promoting local development of natural resources within Suriname.
v3.10.0.1
RELATED PARTY TRANSACTIONS
12 Months Ended
Dec. 31, 2018
Related Party [Abstract]  
RELATED PARTY TRANSACTIONS
RELATED PARTY TRANSACTIONS
(a)    Receivables and other current assets from related parties
The Company had the following related party transactions included in Receivables and other current assets and in Other non-current assets in the Consolidated balance sheets:
 
 
Years ended December 31,
 
Notes
2018
2017
Sadiola and Yatela (Non-interest bearing)
 
 
 
Balance, beginning of the year
 
$
0.1

$
0.2

Advances
 
0.3

0.9

Repayments
 
(0.3
)
(1.0
)
Balance, end of the year
11
$
0.1

$
0.1

Sadiola Sulphide Project (LIBOR plus 2%)1
 
 


Balance, beginning of the year
 
$
36.3

$
31.3

Advances
 
0.9

5.0

  Repayments

 
(12.3
)

  Write-down of receivable2
32
(10.9
)

Balance, end of the year
16
$
14.0

$
36.3

1
These advances were part of an extended loan agreement, reached in the fourth quarter of 2016, for the Sadiola Sulphide Project, and are to be repaid on the earlier of December 31, 2020 or, at such time as Sadiola has sufficient free cash flow.
2Write-down of receivable due to a decrease in the fair value of collateral.

During the year ended December 31, 2018, the Company spent $0.9 million (December 31, 2017 - $nil) to fund the Yatela closure plan. This was recognized as a reduction of the provision for Yatela as a result of the Company equity accounting for the investment (note 17).
(b)
Compensation of key management personnel
Compensation breakdown for key management personnel, comprising of the Company’s directors and executive officers, is as follows:
 
Years ended December 31,
 
2018
2017
Salaries and other benefits1
$
7.1

$
5.4

Share-based payments
4.4

3.6

 
$
11.5

$
9.0

1
Salaries and other benefits include amounts paid to directors.
v3.10.0.1
SEGMENTED INFORMATION
12 Months Ended
Dec. 31, 2018
Operating Segments [Abstract]  
SEGMENTED INFORMATION
SEGMENTED INFORMATION
The Company’s gold mines are divided into geographic segments as follows:
Burkina Faso - Essakane mine;
Suriname - Rosebel mine;
Canada - Doyon division, including Westwood mine;
Incorporated joint ventures (Mali) - Sadiola mine (41%) and Yatela mine, which is in closure (40%).
The Company’s non-gold segments are divided as follows:
Exploration and evaluation and development; and
Corporate - includes royalty interests located in Canada and investments in associates and incorporated joint ventures.


 
December 31, 2018
December 31, 2017
 
Total non-
current
assets
Total
assets
Total
liabilities
Total non-
current
assets
Total
assets
Total
liabilities
Gold mines
 
 
 
 
 
 
Burkina Faso

$
865.3

$
1,110.6

$
210.6

$
849.3

$
1,070.7

$
204.8

Suriname

674.3

847.1

292.9

643.3

825.4

256.0

Canada
717.2

747.7

207.1

697.0

717.0

205.3

Total gold mines
2,256.8

2,705.4

710.6

2,189.6

2,613.1

666.1

Exploration and evaluation and development
465.6

548.8

11.8

437.8

483.4

9.6

Corporate1
151.7

706.8

446.0

178.5

870.4

444.4

Total per consolidated financial statements
$
2,874.1

$
3,961.0

$
1,168.4

$
2,805.9

$
3,966.9

$
1,120.1

Incorporated joint ventures (Mali)2
$
103.1

$
166.0

$
123.6

$
128.9

$
179.9

$
149.6

1 The carrying amount of the Investment in incorporated joint ventures is included in the corporate segment as non-current assets.
2 The breakdown of the financial information for the incorporated joint ventures has been disclosed above as it is reviewed regularly by the Company's CODM to assess the performance of the incorporated joint ventures and to make resource allocation decisions.

Year ended December 31, 2018
 
Consolidated statements of earnings information
Net capital
expenditures
4
 
Revenues
Cost of
sales1
Depreciation
expense2
General 
and
administrative3
Exploration
Other
Earnings
(loss) from
operations
Gold mines
 
 
 
 
 
 
 
 
Burkina Faso

$
564.1

$
338.0

$
135.1

$

$

$
7.0

$
84.0

$
158.2

Suriname

386.0

260.7

82.7


4.6

1.6

36.4

64.7

Canada
160.5

110.0

45.0



7.4

(1.9
)
55.1

Total gold mines excluding incorporated joint ventures
1,110.6

708.7

262.8


4.6

16.0

118.5

278.0

Exploration and evaluation and development5




34.6

0.7

(35.3
)
17.8

Corporate6
0.4


2.6

42.1


4.8

(49.1
)
5.1

Total per consolidated financial statements
1,111.0

708.7

265.4

42.1

39.2

21.5

34.1

300.9

Incorporated joint ventures (Mali)7
76.5

55.0

1.8


0.2

3.5

16.0

1.2

 
$
1,187.5

$
763.7

$
267.2

$
42.1

$
39.4

$
25.0

$
50.1

$
302.1

1 Excludes depreciation expense.
2 Depreciation expense excludes depreciation related to Corporate assets, which is included in General and administrative expenses.
3 Includes depreciation expense relating to Corporate and Exploration and evaluation assets.
4 Includes cash expenditures for Property, plant and equipment, Exploration and evaluation assets and finance lease payments.
5 Closed site costs on Exploration and evaluation properties included in other expenses.
6 Includes earnings from royalty interests.
7 Net earnings from incorporated joint ventures are included in a separate line in the Consolidated statements of earnings. The breakdown of the financial information has been disclosed above as it is reviewed regularly by the Company’s CODM to assess its performance and to make resource allocation decisions.
Year ended December 31, 2017
 
Consolidated statements of earnings information
Net capital
expenditures
4
 
Revenues
Cost of
sales1
Depreciation
expense2
General
and
administrative3
Exploration
Impairments (reversals)
Other
Earnings
(loss) from
operations
Gold mines
 
 
 
 
 
 
 
 
 
Burkina Faso

$
547.4

$
340.1

$
132.6

$

$

$

$

$
74.7

$
82.4

Suriname

385.6

231.0

83.8


5.0

(116.0
)
2.7

179.1

59.4

Canada
161.5

105.5

45.3




6.2

4.5

61.1

Total gold mines excluding incorporated joint ventures
1,094.5

676.6

261.7


5.0

(116.0
)
8.9

258.3

202.9

Exploration and evaluation and development5


0.2

0.2

33.4

(400.0
)
0.9

365.3

5.3

Corporate6
0.4


3.5

40.1


(8.1
)
8.5

(43.6
)
2.3

Total per consolidated financial statements
1,094.9

676.6

265.4

40.3

38.4

(524.1
)
18.3

580.0

210.5

Incorporated joint ventures (Mali)7
82.1

59.4

1.6


1.4



19.7

10.0

 
$
1,177.0

$
736.0

$
267.0

$
40.3

$
39.8

$
(524.1
)
$
18.3

$
599.7

$
220.5

1
Excludes depreciation expense.
2
Depreciation expense excludes depreciation related to Corporate assets, which is included in General and administrative expenses.
3
Includes depreciation expense relating to Corporate and Exploration and evaluation assets.
4
Includes cash expenditures for Property, plant and equipment, Exploration and evaluation assets and finance lease payments.
5
Closed site costs on Exploration and evaluation properties included in other expenses.
6
Includes earnings from royalty interests.
7
Net earnings from incorporated joint ventures are included in a separate line in the Consolidated statements of earnings. The breakdown of the financial information has been disclosed above as it is reviewed regularly by the Company’s CODM to assess its performance and to make resource allocation decisions.
v3.10.0.1
SUBSEQUENT EVENTS
12 Months Ended
Dec. 31, 2018
Subsequent Events1 [Abstract]  
SUBSEQUENT EVENT
SUBSEQUENT EVENTS
On January 15, 2019, the Company entered into a forward gold sale arrangement ("Arrangement") with a syndicate of banks whereby the Company will receive a cash prepayment amount of $170 million in exchange for delivering 150,000 ounces of gold in 2022, with a gold floor price of $1,300 per ounce and a cap price of $1,500 per ounce. The cost of the Arrangement is 5.38% per annum.
On February 14, 2019, Sadiola Exploration Limited ("SADEX"), a subsidiary jointly held by the Company and AngloGold Ashanti Limited, entered into a share purchase agreement with the Government of Mali, whereby SADEX agreed to sell to the Government of Mali its 80% participation in Société d’Exploitation des Mines d’Or de Yatela (“Yatela”), for a consideration of $1. The transaction remains subject to the fulfillment of a number of conditions precedent, among which the adoption of two laws, confirming the change of status of Yatela to a State Entity, and also the creation of a dedicated state agency, notably in charge of mine rehabilitation and closure. As part of the transaction, and upon its completion, SADEX will make a one-time payment to the said state agency, in an amount corresponding to the estimated costs of completing the rehabilitation and closure of the Yatela mine, and also financing certain outstanding social programs. Upon completion and this payment being made, SADEX and its affiliated companies will be released of all obligations relating to the Yatela mine including those relating to rehabilitation, mine closure and the financing of social programs.
v3.10.0.1
BASIS OF PREPARATION (Policies)
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
Statement of compliance
These consolidated financial statements of IAMGOLD and all of its subsidiaries, joint ventures and associates as at and for the years ended December 31, 2018 and 2017, have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board ("IASB").
These consolidated financial statements were prepared on a going concern basis. The significant accounting policies applied in these consolidated financial statements are presented in note 4 and have been consistently applied in each of the years presented, except for the new accounting standards presented in note 3.
These consolidated financial statements of IAMGOLD were authorized for issue in accordance with a resolution of the Board of Directors on February 20, 2019.
Basis of measurement
The consolidated financial statements have been prepared on a historical cost basis, except for items measured at fair value as discussed in note 22.
Subsidiaries
Subsidiaries are entities over which the Company has the ability to exercise control. Control of an entity is defined to exist when the Company is exposed to variable returns from involvement with the entity and has the ability to affect those returns through power over the entity. Specifically, the Company controls an entity if the Company has all of the following: power over the entity (i.e. existing rights that give the Company the current ability to direct the relevant activities of the entity); exposure, or rights, to variable returns from involvement with the entity; and the ability to use power over the entity to affect its returns. Subsidiaries are consolidated from the acquisition date, which is the date on which the Company obtains control of the acquired entity. Where the Company’s interest in a subsidiary is less than 100%, the Company recognizes a non-controlling interest. All intercompany balances, transactions, income, expenses and profits or losses have been eliminated on consolidation.
Associates
Joint arrangements
Joint arrangements are those arrangements over which the Company has joint control established by contractual agreement and requiring unanimous consent of the joint venture parties for financial and operating decisions. The Company’s significant joint arrangements consist of joint ventures, which are structured through separate legal entities. The financial results of joint ventures are accounted for using the equity method from the date that joint control commences until the date that joint control ceases, and are prepared for the same reporting period as the Company, using consistent accounting policies. There are no significant judgments and assumptions made in determining the existence of joint control of Société d’Exploitation des Mines d’Or de Sadiola S.A.
Share of net losses from joint ventures are recognized in the consolidated financial statements until the carrying amount of the interest in the joint venture is reduced to nil. Thereafter, losses are recognized only to the extent that the Company has an obligation to fund the joint venture’s operations or has made payments on behalf of the joint venture.
Dividends received from the Company's joint ventures are presented in the Company's Consolidated statements of cash flows as operating activities.
Unincorporated arrangements
The Company participates in an unincorporated arrangement and has rights to its share of the undivided assets, liabilities, revenues and expenses of the property, subject to the arrangement, rather than a right to a net return, and does not share joint control (note 10). All such amounts are measured in accordance with the terms of the arrangement, which is usually in proportion to the Company’s interest in the assets, liabilities, revenues and expenses of the property. These amounts are recorded in the Company’s consolidated financial statements on the appropriate lines.
Functional and presentation currency
Financial instruments
The Company recognizes financial assets and financial liabilities on the date the Company becomes a party to the contractual provisions of the instruments. A financial asset is derecognized either when the Company has transferred substantially all the risks and rewards of ownership of the financial asset or when cash flows expire. A financial liability is derecognized when the obligation specified in the contract is discharged, canceled or expired. Certain financial instruments are recorded at fair value in the Consolidated balance sheets. Refer to note 22 on fair value measurements.
(i)
Non-derivative financial instruments
Non-derivative financial instruments are recognized initially at fair value plus attributable transaction costs, where applicable for financial instruments not classified as fair value through profit or loss. Subsequent to initial recognition, non-derivative financial instruments are classified and measured as described below.
Financial assets at fair value through profit or loss
Cash and cash equivalents, restricted cash, short-term investments, bond fund investments and warrants are classified as financial assets at fair value through profit or loss and are measured at fair value. Cash equivalents are short-term investments with initial maturities of three months or less. Short-term investments have initial maturities of more than three months and less than 12 months. The unrealized gains or losses related to changes in fair value are reported in Interest income and derivatives and other investment gains (losses) in the Consolidated statements of earnings.
Amortized cost
Trade and other receivables and fixed rate investments are classified as and measured at amortized cost using the effective interest rate method, less impairment losses, if any.
Financial assets at fair value through other comprehensive income
The Company’s investments in equity marketable securities are designated as financial assets at fair value through other comprehensive income and are recorded at fair value on the trade date with directly attributable transaction costs included in the recorded amount. Subsequent changes in fair value are recognized in other comprehensive income.
Non-derivative financial liabilities
Accounts payable, accrued liabilities, senior notes, and borrowings under the credit facility are accounted for at amortized cost, using the effective interest rate method. The amortization of senior notes issue costs is calculated using the effective interest rate method, and the amortization of credit facility issue costs is calculated on a straight-line basis over the term of the credit facility.
(ii)Non-hedge derivatives
The Company may hold derivative financial instruments to hedge its risk exposure to fluctuations of other currencies compared to the U.S. dollar, and fluctuations in commodity prices such as for oil and fuel. All derivative financial instruments not designated in a hedge relationship that qualifies for hedge accounting are classified as financial instruments at fair value through profit or loss. Derivative financial instruments at fair value through profit or loss, including embedded derivatives, requiring separation from its host contact, are recorded in the Consolidated balance sheets at fair value.
Changes in the estimated fair value of non-hedge derivatives at each reporting date are included in the Consolidated statements of earnings as non-hedge derivative gain or loss.
Embedded derivatives in financial liabilities measured at amortized cost are separated from the host contract and accounted for separately if the economic characteristics and risks of the host contract and the embedded derivative are not closely related.
(iii)Hedge derivatives
The Company uses derivative financial instruments to hedge its exposure to exchange rate fluctuations on foreign currency denominated revenues, operating expenses and purchases of non-financial assets and its exposure to price fluctuations of consumable purchases.
The Company formally documents all relationships between hedging instruments and hedged items, as well as its risk management objectives and strategies for undertaking hedge transactions. This process includes linking all derivative hedging instruments to forecasted transactions. Hedge effectiveness is assessed based on the degree to which the cash flows from the derivative contracts are expected to offset the cash flows of the underlying transaction being hedged.
When a derivative is designated as a cash flow hedging instrument, the effective portion of changes in fair value is recognized in other comprehensive income, net of tax. For hedged items other than the purchase of non-financial assets, the amounts accumulated in other comprehensive income are reclassified to the Consolidated statements of earnings when the underlying hedged transaction, identified at contract inception, affects profit or loss. When hedging a forecasted transaction that results in the recognition of a non-financial asset, the amounts accumulated in equity are removed and added to the carrying amount of the non-financial asset.
Any ineffective portion of a hedge relationship is recognized immediately in the Consolidated statements of earnings. The Company has elected to exclude the time value component of options and the forward element of forward contracts from the hedging relationships, with changes in these amounts recorded in other comprehensive income and treated as a cost of hedging. For hedged items other than the purchase of non-financial assets, the cost of hedging amounts is reclassified to the Consolidated statements of earnings when the underlying hedged transaction affects profit or loss. When hedging a forecasted transaction that results in the recognition of a non-financial asset, the cost of hedging is added to the carrying amount of the non-financial asset.
When derivative contracts designated as cash flow hedges are terminated, expired, sold or no longer qualify for hedge accounting, hedge accounting is discontinued prospectively. Any amounts recorded in other comprehensive income up until the time the contracts do not qualify for hedge accounting remain in other comprehensive income. Amounts recognized in other comprehensive income are recognized in the Consolidated statements of earnings in the period in which the underlying hedged transaction is completed. Gains or losses arising subsequent to the derivative contracts not qualifying for hedge accounting are recognized in the period incurred in the Consolidated statements of earnings.
If the forecasted transaction is no longer expected to occur, then the amounts accumulated in other comprehensive income are reclassified to the Consolidated statements of earnings immediately.
Inventories
Finished goods and ore stockpiles are measured at the lower of weighted average production cost and net realizable value. Mine supplies are measured at the lower of average purchase cost and net realizable value. Net realizable value is calculated as the difference between the estimated selling price and estimated costs to complete processing into a saleable form plus variable selling expenses.
Production costs include the cost of materials, labour, mine site production overheads and depreciation to the applicable stage of processing. Production overheads are allocated to inventory based on the normal capacity of production facilities.
The cost of ore stockpiles is increased based on the related current cost of production for the period, and decreases in stockpiles are charged to cost of sales using the weighted average cost per tonne. Stockpiles are segregated between current and non-current inventories in the Consolidated balance sheets based on the period of planned usage.
The cost of inventory is reduced to net realizable value to reflect changes in grades, quantity or other economic factors and to reflect current intentions for the use of redundant or slow-moving items. Provisions for redundant and slow-moving items are made by reference to specific items of inventory. The Company reverses write-downs when there is a subsequent increase in net realizable value and where the inventory is still on hand.
Spare parts, stand-by and servicing equipment held are generally classified as inventories. Major capital spare parts and stand-by equipment (insurance spares) are classified as a component of property, plant and equipment.
Property, plant and equipment
Property, plant and equipment are measured at cost less accumulated depreciation and accumulated impairment charges.
The initial cost of an asset comprises its purchase or construction cost, any costs directly attributable to bringing the asset to a working condition for its intended use, the initial estimate of the asset retirement obligation, and for qualifying assets, borrowing costs.
The purchase price or the construction cost is the aggregate cash paid and the fair value of any other consideration given to acquire the asset.
Gains or losses on disposal of an item of property, plant and equipment are determined by comparing the proceeds from disposal with the carrying amount of property, plant and equipment, and are recognized in the Consolidated statements of earnings in other expenses.
The cost of replacing part of an item of property, plant and equipment is recognized in the carrying amount of the item if it is probable that the future economic benefits embodied within the part will flow to the Company and its cost can be measured reliably. The carrying amount of the replaced part is de-recognized. Costs of the day-to-day servicing of property, plant and equipment are recognized in the Consolidated statements of earnings as incurred.
Property, plant and equipment presented in the Consolidated balance sheets represents the capitalized expenditures related to: construction in progress; mining properties, stripping costs; and plant and equipment, including corporate assets.
Plant and equipment located at corporate locations includes the following categories of assets: furniture and equipment, computer equipment, software, scientific instruments and equipment, vehicles and leasehold improvements and at the mine site includes land and buildings, plant equipment, capital spares, and other equipment.
Construction in progress
Upon determination of technical feasibility and commercial viability of extracting a mineral resource, the related exploration and evaluation assets (refer to note 4(e) below) are transferred to construction in progress costs. These amounts plus all subsequent mine development costs are capitalized. Costs are not depreciated until the project is ready for use as intended by management.
Mine construction costs include expenditures to develop new ore bodies, define further mineralization in existing ore bodies, and construct, install and complete infrastructure facilities.
Borrowing costs are capitalized and allocated specifically to qualifying assets when funds have been borrowed, either to specifically finance a project or for general borrowings during the period of construction.
Qualifying assets are defined as assets that require more than six months to be brought to the location and condition intended by management. Capitalization of borrowing costs ceases when such assets are ready for their intended use.
The date of transition from construction to production accounting is based on both qualitative and quantitative criteria such as substantial physical project completion, sustained level of mining, sustained level of processing activity, and passage of a reasonable period of time. Upon completion of mine construction activities (based on the determination of the commencement of production), costs are removed from construction in progress assets and classified into the appropriate categories of property, plant and equipment and supplies inventories.
Mining properties
Capitalized costs for evaluation on or adjacent to sites where the Company has mineral deposits, are classified as mining properties within property, plant and equipment.
Stripping Costs
Costs associated with stripping activities in an open pit mine are expensed within cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to mining properties within property, plant and equipment. Furthermore, stripping costs are capitalized to inventory to the extent that the benefits of the stripping activity relate to gold production inventories, concentrate inventory or ore stockpiles.
Depreciation
Effective from the point an asset is available for its intended use, property, plant and equipment are depreciated using either the straight-line or units-of-production methods over the shorter of the estimated economic life of the asset or the mining operation. Depreciation is determined based on the method which best represents the use of the assets.
The reserve and resource estimates for each mining operation are the prime determinants of the life of a mine. In general, when the useful life of property, plant and equipment is akin to the life of the mining operation and the ore body's mineralization is reasonably well defined, the asset is depreciated on a units-of-production basis over its proven and probable mineral reserves. Non-reserve material may be included in depreciation calculations in limited circumstances where there is a high degree of confidence in its economic extraction. The Company evaluates the estimate of mineral reserves and resources at least on an annual basis and adjusts the units-of-production method calculation prospectively. In 2018 and 2017, the Company has not incorporated any non-reserve material in its depreciation calculations on a units-of-production basis. When property, plant and equipment are depreciated on a straight-line basis, the useful life of the mining operation is determined based on the most recent life of mine (“LOM”) plan. LOM plans are typically developed annually and are based on management’s current best estimates of optimized mine and processing plans, future operating costs and the assessment of capital expenditures of a mine site.
Estimated useful lives normally vary from three to fifteen years for items of plant and equipment to a maximum of twenty years for buildings.
Amounts related to expected economic conversions of resources to reserves recorded in an asset acquisition are not depreciated until resources are converted into reserves. Amounts related to capitalized costs of exploration and evaluation assets and construction in progress are not depreciated as the assets are not available for use.
Capitalized stripping costs are depreciated over the reserves that directly benefit from the specific stripping activity using the units-of-production method.
Capitalized borrowing costs are depreciated over the useful life of the related asset.
Residual values, useful lives and depreciation methods are reviewed at least annually and adjusted if appropriate. The impact of changes to the estimated useful lives, change in depreciation method or residual values is accounted for prospectively.
Mineral exploration and evaluation expenditures
Exploration activities relate to the collection of exploration data which consists of geological, geophysical, geochemical, sampling, drilling, trenching, analytical test work, assaying, mineralogical, metallurgical, and other similar information that is derived from activities undertaken to locate, investigate, define or delineate a mineral prospect or mineral deposit. Mineral exploration costs are expensed as incurred.
Evaluation costs are capitalized and relate to activities to evaluate the potential technical feasibility and commercial viability of extracting a mineral resource on sites where the Company does not have mineral deposits already being mined or constructed. The technical feasibility and commercial viability is based on management’s evaluation of the geological properties of an ore body based on information obtained through evaluation activities, including metallurgical testing, resource and reserve estimates and economic assessment whether the ore body can be mined economically. Exploration properties acquired through asset acquisitions are also recognized as exploration and evaluation assets.
Other intangible assets
Other intangible assets pertain to the fair value of favourable supplier contracts related to a prior acquisition. The fair value was determined using a differential cost method based on cost savings expected from favourable terms of supplier contracts. Other intangible assets are amortized under the straight-line method based on the terms of each contract, which range from 2 to 20 years. Other intangible assets are classified in Other non-current assets in the Consolidated balance sheets.
Impairment and reversal of impairment: Financial assets
Financial assets measured at amortized cost are reviewed for impairment at each reporting date to determine whether there is any objective evidence of impairment. A financial asset is considered to be impaired if objective evidence, that can be estimated reliably, indicates that one or more events have had a negative effect on the estimated future cash flows of that asset.
An impairment charge in respect of a financial asset measured at amortized cost is calculated as the difference between its carrying amount and the present value of the estimated future cash flows discounted at the original effective interest rate.
A prior period impairment charge is reviewed for possible reversal of impairment whenever an event or change in circumstance indicates the impairment may have reversed. If it has been determined that the impairment has reversed, the carrying amount of the asset is increased to its recoverable amount to a maximum of the carrying amount that would have been determined had no impairment charge been recognized in prior periods. Impairment charge reversals are recognized in the Consolidated statements of earnings.
Impairment and reversal of impairment: Non-financial assets
The carrying amounts of the Company’s non-current assets, including property, plant and equipment and exploration and evaluation assets, are reviewed at each reporting date to determine whether there is any indication of impairment. If any such indicator exists, the Company performs an impairment test.
An impairment test requires the Company to determine the recoverable amount of an asset or group of assets. For non-current assets, including property, plant and equipment and exploration and evaluation assets, the recoverable amount is determined for an individual asset, unless the asset does not generate cash inflows that are largely independent of those from other assets or groups of assets. If this is the case, the individual assets are grouped together into a cash generating unit ("CGU") for impairment testing purposes. A CGU for impairment testing is typically considered to be an individual mine site or a development project.
The recoverable amount is determined as the higher of the CGU’s fair value less costs of disposal (“FVLCD”) and value in use (“VIU”). If the carrying amount of the asset or CGU exceeds its recoverable amount, an impairment charge is recorded to the other long-lived assets in the CGU on a pro rata basis.
An assessment is made at each reporting date to determine whether there is an indication that previously recognized impairment losses may no longer exist or may have reversed. If it has been determined that the impairment has reversed, the carrying amount of the asset is increased to its recoverable amount to a maximum of the carrying amount that would have been determined had no impairment charge been recognized in prior periods. An impairment charge reversal is recognized in the Consolidated statements of earnings. Impairment charges recognized in relation to goodwill are not reversed for subsequent increases in a CGU’s recoverable amount.
In the absence of market related comparative information, the FVLCD is determined based on the present value of estimated future cash flows from each long-lived asset or CGU. The assumptions used in determining the FVLCD for the CGU’s are typically life-of-mine ("LOM") production profiles, long-term commodity prices, reserves and resources, discount rates, foreign exchange rates, values of un-modeled mineralization, capital expenditures, net asset value (“NAV”) multiples and expected commencement of production for exploration and evaluation projects. Management’s assumptions and estimates of future cash flows are subject to risks and uncertainties, particularly in market conditions where higher volatility exists, and may be partially or totally outside of the Company's control. Therefore, it is reasonably possible that changes could occur with evolving economic conditions, which may affect the recoverability of the Company’s long-lived assets. If the Company fails to achieve its valuation assumptions or if any of its long-lived assets or CGUs experience a decline in their fair value, this may result in an impairment charge in future periods, which would reduce the Company's earnings.
Asset retirement obligations
The Company records the present value of estimated costs of legal and constructive obligations required to restore locations in the period in which the obligation is incurred with a corresponding increase in the carrying amount of the related property, plant and equipment. For locations where mining activities have ceased, changes to obligations are charged directly to the Consolidated statements of earnings. The obligation is generally considered to have been incurred when mine assets are constructed or the ground environment is disturbed at the production location. The discounted liability is adjusted at the end of each period to reflect the passage of time, based on a risk-free discount rate that reflects current market assessments, and changes in the estimated future cash flows underlying the obligation.
The Company also estimates the timing of the outlays, which are subject to change depending on continued operation or newly discovered reserves.
The periodic unwinding of the discount is recognized in earnings as accretion expense included in finance costs in the Consolidated statements of earnings. Additional disturbances or changes in restoration costs or in discount rates are recognized as changes to the corresponding assets and asset retirement obligation when they occur. Environmental costs at operating mines, as well as changes to estimated costs and discount rates for closed sites, are charged to earnings in the period during which they occur.
Other provisions
Provisions are recognized when a legal or constructive present obligation exists as a result of a past event, for which it is probable that an outflow of economic resources will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation.
Provisions are reviewed at the end of each reporting period and adjusted to reflect management's current best estimate of the expenditure required to settle the present obligation at the end of the reporting period. If it is no longer probable that an outflow of resources embodying economic benefits will be required to settle the obligation, the provision is reversed. Provisions are reduced by actual expenditures for which the provision was originally recognized.
Certain conditions may exist as of the date of the consolidated financial statements, which may result in a loss to the Company, but which will only be resolved when one or more future events will occur or fail to occur. If the assessment of a contingency determines that a loss is probable, and the amount can be reliably estimated, then a provision is recorded. When a contingent loss is not probable but is reasonably possible, then the contingent liability is disclosed in the consolidated financial statements.
Income taxes
(i)
Current income tax
Current income tax assets and liabilities for the current and prior periods are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted by the balance sheet date.
Current income tax assets and current income tax liabilities are only offset if a legally enforceable right exists to set off the amounts, and the Company intends to settle on a net basis or to realize the asset and settle the liability simultaneously.
Current income taxes related to items recognized directly in equity are recognized directly in equity.
(ii)
Deferred income tax
Deferred income tax is recognized in respect of temporary differences between the carrying amounts of assets and liabilities in the Consolidated balance sheets and tax bases.
Deferred income tax liabilities are recognized for all taxable temporary differences, except:
Where the deferred income tax liability arises from the initial recognition of goodwill or of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither accounting profit nor taxable profit (tax loss); and
In respect of taxable temporary differences associated with investments in subsidiaries, associates and joint ventures, where the timing of the reversal of the temporary differences can be controlled by the parent or venture and it is probable that the temporary differences will not reverse in the foreseeable future.
Deferred income tax assets are recognized for all deductible temporary differences, carry forward of unused tax credits and unused tax losses, to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, the carry forward of unused tax credits and unused tax losses can be used, except:
When the temporary difference results from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither accounting profit nor taxable profit (tax loss); and
In respect of deductible temporary differences associated with investments in subsidiaries, associates and joint ventures, deferred income tax assets are recognized only to the extent that it is probable that the temporary differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be used.
The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be used. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered.
A translation gain or loss may arise for deferred income tax purposes where the local tax currency is not the same as the functional currency for non-monetary assets. A deferred tax asset or liability is recognized on the difference between the carrying amount for accounting purposes (which reflects the historical cost in the entity’s functional currency) and the underlying tax basis (which reflects the current local tax cost, translated into the functional currency using the current foreign exchange rate). The translation gain or loss is recorded in Income taxes on the Consolidated statements of earnings.
Deferred income tax assets and liabilities are measured at the tax rates that are expected to apply to the year when the asset is expected to be realized or the liability settled, based on tax rates (and tax laws) that have been enacted or substantively enacted at the balance sheet date.
Deferred income taxes related to items recognized directly in equity are recognized directly in equity.
Deferred income tax assets and deferred income tax liabilities are offset, if a legally enforceable right exists to set off current income tax assets against current income tax liabilities and the deferred income taxes relate to the same taxable entity and the same taxation authority.
There is no certainty that future income tax rates will be consistent with current estimates.
Flow-through common shares
The Company recognizes flow-through common shares in equity based on the quoted market price of the existing shares on the date of issue. The difference between the amount recognized in common shares and the amount the investors pay for the shares is recognized as a deferred gain which is reversed into earnings as eligible expenditures are incurred. The deferred income tax impact is recorded as eligible expenditures are incurred.
Earnings per share
The Company presents basic and diluted earnings per share data for its common shares. Basic earnings per share are calculated by dividing earnings attributable to equity holders by the weighted average number of common shares outstanding during the period. Diluted earnings per share are determined by adjusting the weighted average number of common shares for the dilutive effect of share-based payments, employee incentive share units, and warrants using the treasury stock method. Under this method, share options whose exercise price is less than the average market price of the Company’s common shares, are assumed to be exercised and the proceeds used to repurchase common shares at the average market price for the period. The incremental number of common shares issued under share options and restricted share units and repurchased from proceeds is included in the calculation of diluted earnings per share.
Share-based compensation
The Company has the following share-based compensation plans with related costs included in general and administrative expenses.
(i)
Share options, share bonus plan, and deferred share plan
The Company operates a number of equity-settled share-based compensation plans in respect to its employees. Share-based compensation costs are measured based on the grant date fair value of the equity-settled instruments and recognized upon grant date over the related service period in the Consolidated statements of earnings and credited to contributed surplus within shareholders’ equity. The Company uses the graded vesting method for attributing share option expense over the vesting period.
The grant date fair value is based on the underlying market price of the shares of the Company taking into account the terms and conditions upon which those equity-settled instruments were granted. The fair value of equity-settled instruments granted is estimated using the Black-Scholes model or other appropriate method and assumptions at grant date. Equity-settled awards are not re-measured subsequent to the initial grant date.
Determination of the grant date fair value requires management estimates such as risk-free interest rate, volatility and weighted average expected life. Share option expense incorporates an expected forfeiture rate which is estimated based on historical forfeiture rates and expectations of future forfeiture rates. The Company makes adjustments if the actual forfeiture rate differs from the expected rate.
The weighted average grant date fair value is the basis for which share-based compensation is recognized in earnings.
Upon exercise of options and/or issuance of shares, consideration paid by employees, as well as the grant date fair value of the equity-settled instruments, are transferred to common shares.
    (ii) Share purchase plan
The Company provides a share purchase plan where the Company contributes towards the purchase of shares on the open market. The Company’s contribution vests on December 31 of each year and is charged to earnings in the year of contribution.
Revenue recognition
Revenues include sales of gold and by-products.
The Company recognizes revenue when it transfers control of a product to the customer. The principal activity from which the Company generates its revenue is the sale of gold to third parties. Delivery of the gold is considered to be the only performance obligation. Revenues are measured based on the consideration specified in the contract with the customer.
Leases
The determination of whether an arrangement is, or contains, a lease is based on the substance of the contractual arrangement at inception date, including whether the arrangement contains the use of a specific asset and the right to use that asset. Where the Company receives substantially all the risks and rewards of ownership of the asset, these arrangements are classified as finance leases. Finance leases are recorded as an asset with a corresponding liability at an amount equal to the lower of the fair value of the leased asset and the present value of the minimum lease payments. Each lease payment is allocated between the liability and finance costs using the effective interest method, with the interest element of the lease charged to the Consolidated statements of earnings as a finance cost. Property, plant and equipment acquired under finance leases are depreciated over the shorter of the useful life of the asset and the lease term.
All other leases are classified as operating leases. Operating lease payments are recognized in the Consolidated statements of earnings on a straight-line basis over the lease term.
Segmented information
The Company’s operating segments are those operations whose operating results are reviewed by the Company’s chief operating decision maker ("CODM") to make resource allocation decisions and assess their performance. The Company's CODM is its Executive Committee. Operating segments whose revenues, net earnings or losses or assets exceed 10% of the total consolidated revenues, net earnings or losses or assets, are reportable segments.
In order to determine the reportable operating segments, various factors are considered, including geographical location and managerial structure. It was determined that the Company’s gold segment is divided into reportable geographic segments. The Company’s other reportable segments have been determined to be the exploration and evaluation and Corporate operating segments, which includes royalty interests located in Canada and investments in associates and joint ventures. The Company discloses segmented information for its joint ventures as it is reviewed regularly by the CODM as part of the performance assessment and resource allocation decision making processes. The operations for the joint ventures in Sadiola and Yatela have been combined for segmented information purposes as they operate in the same geographical location and share production resources and facilities.
Significant accounting judgements, estimates and assumptions
The preparation of consolidated financial statements in conformity with IFRS requires management to make judgments, estimates and assumptions that affect the reported amounts of assets, liabilities and contingent liabilities at the date of the consolidated financial statements and reported amounts of revenues and expenses during the reporting period. Estimates and assumptions are continuously evaluated and are based on management’s experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances.
Assumptions about the future and other major sources of estimation uncertainty at the end of the reporting period have a significant risk of resulting in a material adjustment to the carrying amounts of assets and liabilities, within the next financial year. The most significant judgments and sources of estimation uncertainty that the Company believes could have a significant impact on the amounts recognized in its consolidated financial statements are described below.
(i)
Mineral reserves and resources
Key sources of estimation uncertainty
Mineral reserves and resources have been estimated by qualified persons as defined in accordance with Canadian Securities Administrators’ National Instrument 43‑101 Standards of Disclosure for Mineral Projects requirements. Mineral reserve and resource estimates include numerous uncertainties and depend heavily on geological interpretations and statistical inferences drawn from drilling and other data, and require estimates of the future price for the commodity and the future cost of operations. The mineral reserve and resource estimates are subject to uncertainty and actual results may vary from these estimates. Results from drilling, testing and production, as well as material changes in metal prices and operating costs subsequent to the date of an estimate, may justify revision of such estimates.
A number of accounting estimates, as described in the relevant accounting policy notes, are impacted by the mineral reserve and resource estimates, which form the basis of the Company's LOM plans:
Capitalization and depreciation of stripping costs (note 4(c)(iii));
Determination of the useful life of property, plant and equipment and measurement of the depreciation expense (note 4(d));
Exploration and evaluation of mineral resources and determination of technical feasibility and commercial viability (note 4(e)). The application of the Company’s accounting policy for exploration and evaluation expenditures requires judgment in determining whether future economic benefits may be realized, which are based on assumptions about future events and circumstances;
Consideration of whether assets acquired meet the definition of a business or should be accounted for as an asset acquisition (note 6);
Impairment and reversal of impairment analysis of non-financial assets including evaluation of estimated future cash flows of CGUs (note 4(g)(ii)); and
Estimates of the outlays and their timing for asset retirement obligations (note 4(h)).
(ii)
Impairment and reversal of impairment assessment of non-financial assets
Key sources of estimation uncertainty
Management’s assumptions and estimate of future cash flows used in the Company’s impairment assessment of non-financial assets are subject to risk and uncertainties, particularly in market conditions where higher volatility exists, and may be partially or totally outside of the Company's control.
If an indication of impairment or reversal of a previous impairment charge exists, or if an Exploration and evaluation asset is determined to be technically feasible and commercially viable, an estimate of a CGU's recoverable amount is calculated. The recoverable amount is based on the higher of FVLCD and VIU using a discounted cash flow methodology taking into account assumptions that would be made by market participants, unless there is a market price available based on a recent purchase or sale of a mine. Cash flows are for periods up to the date that mining is expected to cease which depends on a number of variables including recoverable mineral reserves and resources, expansion plans and the forecasted selling prices for such production.
In estimating the net realizable value of inventories, a significant estimate is made regarding the quantities of saleable metals included in stockpiles based on the quantities of ore, the grade of ore and the estimated recovery percentage. There can be no assurance that actual quantities will not differ significantly from estimates used.
Judgments made in relation to accounting policies
Both internal and external sources of information are required to be considered when determining whether an impairment indicator or indicator of a previous impairment has reversed may be present. Judgment is required around significant adverse changes in the business climate which may be indicators for impairment such as a significant decline in the asset’s market value, decline in resources and/or reserves as a result of geological re-assessment or change in timing of extraction of resources and/or reserves which would result in a change in the discounted cash flow obtained from the site, and lower metal prices or higher input cost prices than would have been expected since the most recent valuation of the site. Judgment is also required when considering whether significant positive changes in any of these items indicate a previous impairment may have reversed.
Judgment is required to determine whether there are indications that the carrying amount of an exploration project is unlikely to be recovered in full from successful development of the project or by sale.
(iii)
Derivative financial instruments
Judgments made in relation to accounting policies
Judgment is required to determine if an effective hedging relationship exists throughout the financial reporting period for derivative financial instruments classified as either a fair value or cash flow hedge. Management assesses the relationships on an ongoing basis to determine if hedge accounting is appropriate.
Key sources of estimation uncertainty
The Company monitors on a regular basis its hedge position for its risk exposure to fluctuations of the U.S. dollar compared to other currencies, and fluctuations in commodity prices such as for oil and gold. Forecasts are based on estimates of future transactions. For its derivative contracts, valuations are based on forward rates considering the market price, rate of interest and volatility, and take into account the credit risk of the financial instrument. Refer to note 21 for more detailed information and sensitivity analyses based on changes in currencies and commodity prices.
(iv)
Provisions and recognition or not of a liability for loss contingencies
Judgments made in relation to accounting policies
Judgments are required to determine if a present obligation exists at the end of the reporting period and by considering all available evidence, including the opinion of experts. The most significant provisions that require judgment to determine if a present obligation exists are asset retirement obligations (AROs). This includes assessment of how to account for obligations based on the most recent closure plans and environmental regulations.
Key sources of estimation uncertainty
Provisions related to present obligations, including AROs, are management’s best estimate of the amount of probable future outflow, expected timing of payments, and discount rates. Refer to note 17.
(v) Unincorporated arrangements
Judgments made in relation to accounting policies
The Company applies its judgment in the interpretation of relevant guidance under IFRS 11 Joint Arrangements to account for its interest in unincorporated arrangements (note 10).
(vi) Determination of deferred income tax assets
Key sources of estimation uncertainty
The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be used. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered. There is no certainty that future income tax rates will be consistent with current estimates. Changes in tax rates increase the volatility of the Company’s earnings. For more information, refer to notes 4(j)(ii) and 19.
v3.10.0.1
BASIS OF PREPARATION (Tables)
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
Disclosure of subsidiaries
Subsidiaries, divisions and investments in joint ventures related to significant properties of the Company are accounted for as outlined below.
Name
Property
– Location
December 31,
2018
December 31,
2017
Type of
Arrangement
Accounting 
Method
Essakane S.A.
Essakane mine (Burkina Faso)
90%
90%
Subsidiary
Consolidation
Rosebel Gold Mines N.V.
Rosebel mine (Suriname)
95%
95%
Subsidiary
Consolidation
Doyon division including the Westwood mine
Doyon division (Canada)
100%
100%
Division
Consolidation
Côté Gold division 1
Côté Gold Project
(Canada)
70%
70%
Division
Proportionate share
Euro Ressources S.A.
France
90%
90%
Subsidiary
Consolidation
Société d'Exploitation des Mines d'Or de Sadiola S.A.
Sadiola mine
(Mali)
41%
41%
Incorporated joint venture
Equity accounting
Merrex Gold Inc.2
Diakha-Siribaya Gold Project (Mali)
100%
100%
Subsidiary
Consolidation
1 Effective June 20, 2017, the Company holds an undivided interest in the assets, liabilities, revenues and expenses of the Côté Gold division through an
unincorporated joint venture (note 10).
2 On February 28, 2017, the Company increased its ownership in Merrex from 23% to 100% (note 6).
NON-CONTROLLING INTERESTS    
Financial information of subsidiaries that have material non-controlling interests are provided below:
 
 
 
December 31, 2018
December 31, 2017
 
 
 
 Essakane
Rosebel
Essakane
Rosebel
Percentage of voting rights held by non-controlling interests
10%
5%
10%
5%
Accumulated non-controlling interest
$
30.3

$
25.3

$
25.5

$
25.9

Net earnings attributable to non-controlling interests
$
5.8

$
0.9

$
0.6

$
5.7

Dividends paid to non-controlling interests1
$
1.0

$
1.5

$
1.0

$
1.0

1
For the year ended December 31, 2018, dividends paid to other non-controlling interests amounted to $1.2 million (December 31, 2017 – $1.1 million).
Selected summarized information relating to these subsidiaries are provided below, before any intercompany eliminations:
 
 
 
December 31, 2018
December 31, 2017
 
 
 
Essakane
Rosebel
 Essakane
Rosebel
Current assets
$
245.1

$
172.8

$
220.5

$
181.0

Non-current assets
865.8

675.1

848.4

645.4

Current liabilities
(96.7
)
(68.4
)
(88.1
)
(72.4
)
Non-current liabilities
(543.5
)
(221.7
)
(552.6
)
(183.6
)
Net assets
$
470.7

$
557.8

$
428.2

$
570.4

 
 
 
Year ended
Year ended
 
 
 
December 31, 2018
December 31, 2017
Revenues
 
 
$
564.1

$
386.0

$
547.4

$
385.6

Net earnings and other comprehensive income
$
52.1

$
17.3

$
8.2

$
113.1

 
 









Net cash from operating activities
$
181.8

$
61.6

$
215.5

$
124.5

Net cash used in investing activities
(161.4
)
(67.9
)
(85.7
)
(63.1
)
Net cash used in financing activities
(45.2
)
(36.1
)
(127.7
)
(25.5
)
Net increase (decrease) in cash and cash equivalents
$
(24.8
)
$
(42.4
)
$
2.1

$
35.9


The Company’s ability to access or use the assets of Essakane and Rosebel to settle its liabilities is not significantly restricted by known current contractual or regulatory requirements, or from the protective rights of non-controlling interests. Dividends payable by Rosebel must be approved by the Rosebel Supervisory Board, which includes representation from the non-controlling interest.
Disclosure of joint ventures
Subsidiaries, divisions and investments in joint ventures related to significant properties of the Company are accounted for as outlined below.
Name
Property
– Location
December 31,
2018
December 31,
2017
Type of
Arrangement
Accounting 
Method
Essakane S.A.
Essakane mine (Burkina Faso)
90%
90%
Subsidiary
Consolidation
Rosebel Gold Mines N.V.
Rosebel mine (Suriname)
95%
95%
Subsidiary
Consolidation
Doyon division including the Westwood mine
Doyon division (Canada)
100%
100%
Division
Consolidation
Côté Gold division 1
Côté Gold Project
(Canada)
70%
70%
Division
Proportionate share
Euro Ressources S.A.
France
90%
90%
Subsidiary
Consolidation
Société d'Exploitation des Mines d'Or de Sadiola S.A.
Sadiola mine
(Mali)
41%
41%
Incorporated joint venture
Equity accounting
Merrex Gold Inc.2
Diakha-Siribaya Gold Project (Mali)
100%
100%
Subsidiary
Consolidation
1 Effective June 20, 2017, the Company holds an undivided interest in the assets, liabilities, revenues and expenses of the Côté Gold division through an
unincorporated joint venture (note 10).
2 On February 28, 2017, the Company increased its ownership in Merrex from 23% to 100% (note 6).
Financial information for investments in Sadiola and Yatela, not adjusted for the percentage held by the Company, is summarized
below:
 
  Year ended December 31, 2018
Year ended December 31, 2017
Joint Ventures
Sadiola
Yatela
Sadiola
Yatela
Summarized statements of earnings
 
 
 
 
Revenues
$
180.9

$
6.0

$
192.5

$
7.7

Depreciation expense
(4.4
)

(4.0
)

Other expenses
(143.1
)
(3.8
)
(143.1
)
(8.0
)
Income tax (expense) recovery
(1.6
)
0.4

(5.2
)
(0.1
)
Net earnings (loss) and other comprehensive income (loss)
$
31.8

$
2.6

$
40.2

$
(0.4
)
 








Summarized balance sheet
December 31, 2018
December 31, 2017
Assets








Cash and cash equivalents
$
90.1

$
0.8

$
62.4

$
0.5

Other current assets
55.0

7.6

53.8

7.9

Non-current assets
251.5


314.5


 
$
396.6

$
8.4

$
430.7

$
8.4

Liabilities








Current liabilities
$
44.0

$
45.0

$
58.6

$
55.8

Non-current liabilities
176.1

38.3

222.4

30.2

 
$
220.1

$
83.3

$
281.0

$
86.0

Net assets (liabilities)
$
176.5

$
(74.9
)
$
149.7

$
(77.6
)
v3.10.0.1
ACQUISITION (Tables)
12 Months Ended
Dec. 31, 2018
Acquisition [Abstract]  
Schedule of purchase price allocation of acquisition
The total purchase price was allocated to the assets acquired and the liabilities assumed based on the fair value of the total consideration transferred at the closing date of the acquisition.
Assets acquired and liabilities assumed
Notes
 
Exploration and evaluation assets


15
$
36.6

Current liabilities
 
(3.9
)
Other non-current liabilities
 
(0.4
)
 
 
$
32.3

Consideration transferred
 
 
Share consideration
 
$
27.4

Less: Cash and cash equivalents acquired
 
(0.1
)
Transaction costs
 
0.2

 
 
27.5

Initial investment1
13
4.8

 
 
$
32.3

1 Prior to completion of the above mentioned transaction, IAMGOLD owned approximately 45.8 million common shares of Merrex, which represented approximately 23% of Merrex's issued and outstanding common shares, and was accounted for as an investment in an associate, using the equity method (note 13). The carrying amount of the investment of $4.8 million on the date of the acquisition has been included in the total cost of the Merrex Exploration and evaluation assets (note 15).
v3.10.0.1
CASH AND CASH EQUIVALENTS (Tables)
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Schedule of Cash and Cash Equivalents
 
December 31,
2018
December 31,
2017
Cash
$
440.3

$
489.2

Short-term deposits with initial maturities of three months or less
174.8

174.9

 
$
615.1

$
664.1

v3.10.0.1
SHORT-TERM INVESTMENTS (Tables)
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Schedule Of Short-Term Investments
 
 
December 31,
2018
December 31,
2017
Money market funds1
 
$
114.6

$
124.6

Other
 
4.4

2.6

 
 
$
119.0

$
127.2

1
Money market funds are comprised of short-term fund investments with redemption notice periods of 185 days.
v3.10.0.1
RECEIVABLES AND OTHER CURRENT ASSETS (Tables)
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Components of receivables and other current assets
 
Notes
December 31,
2018
December 31,
2017
Gold receivables
 
$
1.6

$

Income taxes receivable
 
4.0

3.2

Receivables from governments1
 
53.4

42.2

Receivables from related parties
37
0.1

0.1

Other receivables
 
4.1

6.7

Total receivables
 
63.2

52.2

Prepayment for other assets
 
2.9


Marketable securities
22(a)
0.5


Prepaid expenses
 
11.4

9.6

Derivatives
22(a)
0.1

14.1

 
 
$
78.1

$
75.9

1
Receivables from governments relate primarily to value added tax.
v3.10.0.1
INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Disclosure of Current and Non-Current Inventories
 
December 31,
2018
December 31,
2017
Finished goods
$
60.7

$
52.8

Ore stockpiles
27.3

5.0

Mine supplies
186.7

142.2

 
274.7

200.0

Non-current ore stockpiles
202.9

177.6

 
$
477.6

$
377.6

v3.10.0.1
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES (Tables)
12 Months Ended
Dec. 31, 2018
Interests In Other Entities [Abstract]  
Disclosure of associates
 
Notes
Associates1
Sadiola2
Yatela2
Total
Balance, January 1, 2017
 
$
5.7

$
46.9

$

$
52.6

Purchase of additional common shares of associate3
 
7.4



7.4

Currency translation adjustment
 
0.8



0.8

Share of net earnings (loss), net of income taxes
 
(1.4
)
16.5

(0.1
)
15.0

Share of net loss recorded as provision
 


0.1

0.1

Share of dividends received
 

(2.1
)

(2.1
)
Acquisition of control over associate4

 
(4.8
)


(4.8
)
Balance, December 31, 2017
 
7.7

61.3


69.0

Currency translation adjustment

(1.2
)


(1.2
)
Share of net earnings (loss), net of income taxes
 
(1.5
)
13.1

1.0

12.6

Share of net earnings recorded as a reduction of the provision
17


(1.0
)
(1.0
)
Share of dividends received


(2.1
)

(2.1
)
Other
 

(0.5
)

(0.5
)
Balance, December 31, 2018
 
$
5.0

$
71.8

$

$
76.8

1
IAMGOLD includes results based on the latest publicly available information.
2
The Company's incorporated joint ventures are not publicly listed.
3
Associate relates to INV Metals Inc. ("INV Metals"), a publicly traded company incorporated in Canada. The Company's ownership interest in INV Metals as at December 31, 2018 was 35.6% (December 31, 2017 - 35.6%). On March 2, 2017, the Company participated in INV Metals' common shares public equity offering and acquired an additional 9.8 million common shares of INV Metals at a price of C$1.00 per share for an aggregate amount of $7.4 million (C$9.8 million). This acquisition allowed the Company to maintain a 35.6% ownership in INV Metals.
4
As of February 28, 2017, the Company acquired all of the issued and outstanding common shares and all of the outstanding common share purchase warrants of Merrex Gold Inc. that it did not already own (note 6).
Disclosure of joint ventures
Financial information for investments in Sadiola and Yatela, not adjusted for the percentage held by the Company, is summarized
below:
 
  Year ended December 31, 2018
Year ended December 31, 2017
Joint Ventures
Sadiola
Yatela
Sadiola
Yatela
Summarized statements of earnings
 
 
 
 
Revenues
$
180.9

$
6.0

$
192.5

$
7.7

Depreciation expense
(4.4
)

(4.0
)

Other expenses
(143.1
)
(3.8
)
(143.1
)
(8.0
)
Income tax (expense) recovery
(1.6
)
0.4

(5.2
)
(0.1
)
Net earnings (loss) and other comprehensive income (loss)
$
31.8

$
2.6

$
40.2

$
(0.4
)
 








Summarized balance sheet
December 31, 2018
December 31, 2017
Assets








Cash and cash equivalents
$
90.1

$
0.8

$
62.4

$
0.5

Other current assets
55.0

7.6

53.8

7.9

Non-current assets
251.5


314.5


 
$
396.6

$
8.4

$
430.7

$
8.4

Liabilities








Current liabilities
$
44.0

$
45.0

$
58.6

$
55.8

Non-current liabilities
176.1

38.3

222.4

30.2

 
$
220.1

$
83.3

$
281.0

$
86.0

Net assets (liabilities)
$
176.5

$
(74.9
)
$
149.7

$
(77.6
)

Associate's combined financial information as reported by INV Metals are summarized below:
 
12 Months ended1
 
2018
2017
Net loss
$
(2.9
)
$
(3.1
)
Other comprehensive income (loss)
1.3

(2.2
)
Comprehensive loss
$
(1.6
)
$
(5.3
)
1
IAMGOLD includes results based on the latest 12 months of publicly available information.

 
Notes
Associates1
Sadiola2
Yatela2
Total
Balance, January 1, 2017
 
$
5.7

$
46.9

$

$
52.6

Purchase of additional common shares of associate3
 
7.4



7.4

Currency translation adjustment
 
0.8



0.8

Share of net earnings (loss), net of income taxes
 
(1.4
)
16.5

(0.1
)
15.0

Share of net loss recorded as provision
 


0.1

0.1

Share of dividends received
 

(2.1
)

(2.1
)
Acquisition of control over associate4

 
(4.8
)


(4.8
)
Balance, December 31, 2017
 
7.7

61.3


69.0

Currency translation adjustment

(1.2
)


(1.2
)
Share of net earnings (loss), net of income taxes
 
(1.5
)
13.1

1.0

12.6

Share of net earnings recorded as a reduction of the provision
17


(1.0
)
(1.0
)
Share of dividends received


(2.1
)

(2.1
)
Other
 

(0.5
)

(0.5
)
Balance, December 31, 2018
 
$
5.0

$
71.8

$

$
76.8

1
IAMGOLD includes results based on the latest publicly available information.
2
The Company's incorporated joint ventures are not publicly listed.
3
Associate relates to INV Metals Inc. ("INV Metals"), a publicly traded company incorporated in Canada. The Company's ownership interest in INV Metals as at December 31, 2018 was 35.6% (December 31, 2017 - 35.6%). On March 2, 2017, the Company participated in INV Metals' common shares public equity offering and acquired an additional 9.8 million common shares of INV Metals at a price of C$1.00 per share for an aggregate amount of $7.4 million (C$9.8 million). This acquisition allowed the Company to maintain a 35.6% ownership in INV Metals.
4
As of February 28, 2017, the Company acquired all of the issued and outstanding common shares and all of the outstanding common share purchase warrants of Merrex Gold Inc. that it did not already own (note 6).
Disclosure of reconciliation of summarised financial information of joint venture accounted for using equity method to carrying amount of interest in joint venture
The following table reconciles the summarized balance sheet to the carrying amount of the Company’s interest in joint ventures:
 
 
December 31, 2018
December 31, 2017
 
 
Sadiola
Yatela
Sadiola
Yatela
Company's equity percentage of net assets of joint ventures
Notes
41%
40%
41%
40%
Share of net assets (liabilities) of joint ventures
 
$
72.3

$
(30.1
)
$
61.3

$
(31.1
)
Loss applied to loans receivable
 

16.0


16.0

Loss recognized in provision
17

14.1


15.1

Other
 
(0.5
)



Carrying amount of interest in joint ventures
 
$
71.8

$

$
61.3

$

Disclosure of joint venture carrying amount
Subsidiaries, divisions and investments in joint ventures related to significant properties of the Company are accounted for as outlined below.
Name
Property
– Location
December 31,
2018
December 31,
2017
Type of
Arrangement
Accounting 
Method
Essakane S.A.
Essakane mine (Burkina Faso)
90%
90%
Subsidiary
Consolidation
Rosebel Gold Mines N.V.
Rosebel mine (Suriname)
95%
95%
Subsidiary
Consolidation
Doyon division including the Westwood mine
Doyon division (Canada)
100%
100%
Division
Consolidation
Côté Gold division 1
Côté Gold Project
(Canada)
70%
70%
Division
Proportionate share
Euro Ressources S.A.
France
90%
90%
Subsidiary
Consolidation
Société d'Exploitation des Mines d'Or de Sadiola S.A.
Sadiola mine
(Mali)
41%
41%
Incorporated joint venture
Equity accounting
Merrex Gold Inc.2
Diakha-Siribaya Gold Project (Mali)
100%
100%
Subsidiary
Consolidation
1 Effective June 20, 2017, the Company holds an undivided interest in the assets, liabilities, revenues and expenses of the Côté Gold division through an
unincorporated joint venture (note 10).
2 On February 28, 2017, the Company increased its ownership in Merrex from 23% to 100% (note 6).
Financial information for investments in Sadiola and Yatela, not adjusted for the percentage held by the Company, is summarized
below:
 
  Year ended December 31, 2018
Year ended December 31, 2017
Joint Ventures
Sadiola
Yatela
Sadiola
Yatela
Summarized statements of earnings
 
 
 
 
Revenues
$
180.9

$
6.0

$
192.5

$
7.7

Depreciation expense
(4.4
)

(4.0
)

Other expenses
(143.1
)
(3.8
)
(143.1
)
(8.0
)
Income tax (expense) recovery
(1.6
)
0.4

(5.2
)
(0.1
)
Net earnings (loss) and other comprehensive income (loss)
$
31.8

$
2.6

$
40.2

$
(0.4
)
 








Summarized balance sheet
December 31, 2018
December 31, 2017
Assets








Cash and cash equivalents
$
90.1

$
0.8

$
62.4

$
0.5

Other current assets
55.0

7.6

53.8

7.9

Non-current assets
251.5


314.5


 
$
396.6

$
8.4

$
430.7

$
8.4

Liabilities








Current liabilities
$
44.0

$
45.0

$
58.6

$
55.8

Non-current liabilities
176.1

38.3

222.4

30.2

 
$
220.1

$
83.3

$
281.0

$
86.0

Net assets (liabilities)
$
176.5

$
(74.9
)
$
149.7

$
(77.6
)
v3.10.0.1
PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2018
Property, plant and equipment [abstract]  
Disclosure of property, plant and equipment
 
Construction
in progress
Mining
properties
Plant and
equipment
Total
Cost
 
 
 
 
Balance, January 1, 2017
$
2.8

$
2,336.5

$
1,886.9

$
4,226.2

Additions
20.9

128.3

83.1

232.3

Changes in asset retirement obligations

4.6


4.6

Disposals

(0.2
)
(31.2
)
(31.4
)
Transfers within Property, plant and equipment
(16.6
)
16.9

(0.3
)

Balance, December 31, 2017
7.1

2,486.1

1,938.5

4,431.7

Additions
41.0

162.1

91.5

294.6

Changes in asset retirement obligations

30.1


30.1

Disposals

(0.3
)
(83.8
)
(84.1
)
Transfers within Property, plant and equipment
(15.3
)
41.3

(26.0
)

Transfers from Exploration and evaluation assets1
482.3



482.3

Balance, December 31, 2018
$
515.1

$
2,719.3

$
1,920.2

$
5,154.6

 
Construction
in progress
Mining
properties
Plant and
equipment
Total
Accumulated Depreciation and Impairment
 
 
 
 
Balance, January 1, 2017
$

$
1,481.5

$
876.5

$
2,358.0

Depreciation expense2

111.8

173.9

285.7

Disposals


(28.1
)
(28.1
)
Reversal of impairment charge3

(124.1
)

(124.1
)
Balance, December 31, 2017

1,469.2

1,022.3

2,491.5

Depreciation expense2

140.4

161.7

302.1

Disposals


(75.1
)
(75.1
)
Balance, December 31, 2018
$

$
1,609.6

$
1,108.9

$
2,718.5

Carrying amount, December 31, 2017
$
7.1

$
1,016.9

$
916.2

$
1,940.2

Carrying amount, December 31, 2018
$
515.1

$
1,109.7

$
811.3

$
2,436.1

1
Refer to note 15.
2 Excludes depreciation expense related to Corporate assets, which is included in General and administrative expenses.
3
Refer to note 35.
 
Côté Gold Project
Saramacca Project
Diakha-Siribaya Gold Project
Other1
Total
Balance, January 1, 2017
$
154.9

$
10.0

$

$
4.3

$
169.2

Exploration and evaluation expenditures2
8.1

11.2


0.9

20.2

Acquired Exploration and evaluation assets

15.9

36.6


52.5

Reversal of impairment charge3
400.0




400.0

Sale of a 30% interest in the Côté Gold Project
(167.3
)



(167.3
)
Balance, December 31, 2017
395.7

37.1

36.6

5.2

474.6

Exploration and evaluation expenditures2
22.0

24.3


5.5

51.8

Acquired Exploration and evaluation assets

3.2



3.2

Transfers to Property, plant and equipment4
(417.7
)
(64.6
)


(482.3
)
Balance, December 31, 2018
$

$

$
36.6

$
10.7

$
47.3

1
Other exploration and evaluation expenditures for the year ended December 31, 2018, included an option payment to Vanstar Mining Resources Inc. for the Nelligan exploration Project of $1.7 million, in addition to $3.8 million in capitalized feasibility study costs relating to the Boto Gold Project.
2
For the year ended December 31, 2018, borrowing costs attributable to Exploration and evaluation assets totaling $4.8 million (December 31, 2017 - $1.9 million) were capitalized at a weighted average rate of 7.24% (2017 - 7.16%).
3
Refer to note 35.
4
During the fourth quarter of 2018, capitalized costs related to the Côté Gold Project and the Saramacca Project were transferred from Exploration and evaluation assets to Property, plant and equipment - Construction in progress (note 14).

v3.10.0.1
EXPLORATION AND EVALUATION ASSETS (Tables)
12 Months Ended
Dec. 31, 2018
Exploration For And Evaluation Of Mineral Resources [Abstract]  
Disclosure of exploration and evaluation assets
 
Construction
in progress
Mining
properties
Plant and
equipment
Total
Cost
 
 
 
 
Balance, January 1, 2017
$
2.8

$
2,336.5

$
1,886.9

$
4,226.2

Additions
20.9

128.3

83.1

232.3

Changes in asset retirement obligations

4.6


4.6

Disposals

(0.2
)
(31.2
)
(31.4
)
Transfers within Property, plant and equipment
(16.6
)
16.9

(0.3
)

Balance, December 31, 2017
7.1

2,486.1

1,938.5

4,431.7

Additions
41.0

162.1

91.5

294.6

Changes in asset retirement obligations

30.1


30.1

Disposals

(0.3
)
(83.8
)
(84.1
)
Transfers within Property, plant and equipment
(15.3
)
41.3

(26.0
)

Transfers from Exploration and evaluation assets1
482.3



482.3

Balance, December 31, 2018
$
515.1

$
2,719.3

$
1,920.2

$
5,154.6

 
Construction
in progress
Mining
properties
Plant and
equipment
Total
Accumulated Depreciation and Impairment
 
 
 
 
Balance, January 1, 2017
$

$
1,481.5

$
876.5

$
2,358.0

Depreciation expense2

111.8

173.9

285.7

Disposals


(28.1
)
(28.1
)
Reversal of impairment charge3

(124.1
)

(124.1
)
Balance, December 31, 2017

1,469.2

1,022.3

2,491.5

Depreciation expense2

140.4

161.7

302.1

Disposals


(75.1
)
(75.1
)
Balance, December 31, 2018
$

$
1,609.6

$
1,108.9

$
2,718.5

Carrying amount, December 31, 2017
$
7.1

$
1,016.9

$
916.2

$
1,940.2

Carrying amount, December 31, 2018
$
515.1

$
1,109.7

$
811.3

$
2,436.1

1
Refer to note 15.
2 Excludes depreciation expense related to Corporate assets, which is included in General and administrative expenses.
3
Refer to note 35.
 
Côté Gold Project
Saramacca Project
Diakha-Siribaya Gold Project
Other1
Total
Balance, January 1, 2017
$
154.9

$
10.0

$

$
4.3

$
169.2

Exploration and evaluation expenditures2
8.1

11.2


0.9

20.2

Acquired Exploration and evaluation assets

15.9

36.6


52.5

Reversal of impairment charge3
400.0




400.0

Sale of a 30% interest in the Côté Gold Project
(167.3
)



(167.3
)
Balance, December 31, 2017
395.7

37.1

36.6

5.2

474.6

Exploration and evaluation expenditures2
22.0

24.3


5.5

51.8

Acquired Exploration and evaluation assets

3.2



3.2

Transfers to Property, plant and equipment4
(417.7
)
(64.6
)


(482.3
)
Balance, December 31, 2018
$

$

$
36.6

$
10.7

$
47.3

1
Other exploration and evaluation expenditures for the year ended December 31, 2018, included an option payment to Vanstar Mining Resources Inc. for the Nelligan exploration Project of $1.7 million, in addition to $3.8 million in capitalized feasibility study costs relating to the Boto Gold Project.
2
For the year ended December 31, 2018, borrowing costs attributable to Exploration and evaluation assets totaling $4.8 million (December 31, 2017 - $1.9 million) were capitalized at a weighted average rate of 7.24% (2017 - 7.16%).
3
Refer to note 35.
4
During the fourth quarter of 2018, capitalized costs related to the Côté Gold Project and the Saramacca Project were transferred from Exploration and evaluation assets to Property, plant and equipment - Construction in progress (note 14).

v3.10.0.1
OTHER NON-CURRENT ASSETS (Tables)
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Schedule of Other Non-Current Assets
 
Notes
December 31,
2018
December 31,
2017
Net loan receivable from related party
37
$
14.0

$
36.3

Marketable securities and warrants
22(a)
14.8

24.2

Advances for the purchase of capital equipment
 
33.4

19.9

Bond fund investments
22(a)
1.0

1.9

Royalty interests
 
5.6

5.6

Long-term prepayment1
 
4.9

4.9

Derivatives
22(a)

4.4

Other
 
4.8

5.5

 
 
$
78.5

$
102.7


1
On March 6, 2017, the Company signed an agreement with a third-party for the construction of a solar power plant to deliver power to the Essakane mine for a period of 15 years upon commissioning for active use. The solar power plant was commissioned for active use on June 1, 2018. A prepayment of $4.9 million was made in 2017 towards the purchase of power in connection with the agreement, and will be utilized as the power is delivered over the term of the agreement.
v3.10.0.1
PROVISIONS (Tables)
12 Months Ended
Dec. 31, 2018
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
Disclosure of Provisions
The following table presents the reconciliation of the provision for asset retirement obligations:
 
 
Years ended December 31,
 
Notes
2018
2017
Balance, beginning of the year
 
$
292.8

$
285.1

Revision of estimated cash flows and discount rates:
 


Capitalized in Property, plant and equipment
14
30.1

4.6

Changes in asset retirement obligations at closed sites
30
7.3

7.5

Sale of 30% interest in the Côté Gold Project
 

(0.3
)
Accretion expense
31
1.2

0.9

Disbursements
 
(4.0
)
(5.0
)
Other
 
0.2


Balance, end of the year
 
327.6

292.8

Less current portion
 
(7.8
)
(10.8
)
Non-current portion
 
$
319.8

$
282.0

 
Notes
December 31,
2018
December 31,
2017
Asset retirement obligations
 
$
327.6

$
292.8

Yatela loss provision1
13
13.2

15.1

Other
 
9.6

8.2

 
 
$
350.4

$
316.1

Current portion of provisions
 
$
9.0

$
17.1

Non-current provisions
 
341.4

299.0

 
 
$
350.4

$
316.1


1 During the year ended December 31, 2018, the Company spent $0.9 million (December 31, 2017 - $nil) to fund the Yatela closure plan. This was recognized as a reduction of the provision for Yatela as a result of the Company equity accounting for the investment.
Disclosure of Asset Retirement Obligations
As at December 31, 2018, the schedule of estimated undiscounted future disbursements for rehabilitation was as follows:
 
C$1

$1

2019
$
10.7

$

2020
18.1


2021
14.7

0.3

2022
9.8


2023
8.4

1.9

2024 onwards
117.4

180.7

 
$
179.1

$
182.9

1
Disbursements in US$ relate to the Essakane and Rosebel mines, and C$ disbursements relate to the Doyon mine and other Canadian sites.
As at December 31, 2018, estimated undiscounted amounts of cash flows required to settle the obligations, expected timing of payments and the average real discount rates assumed in measuring the asset retirement obligations were as follows:
 
Undiscounted
Amounts Required
(C$)
Undiscounted
Amounts Required
($)
Expected Timing of Payments
Average Real Discount Rates
Rosebel mine
$

$
96.3

2019-2064
0.8
%
Essakane mine

86.6

2019-2031
0.7
%
Doyon mine
152.8


2019-2047
0.3
%
Other Canadian sites
26.3


2019-2118
0.2
%
 
$
179.1

$
182.9

 
 
v3.10.0.1
OTHER LIABILITIES (Tables)
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Components of other liabilities
 
Notes
December 31,
2018
December 31,
2017
Finance lease liabilities
 
$
9.3

$
0.2

Derivatives
22(a)
10.6


Other liabilities
10

2.9

 
 
$
19.9

$
3.1

Current portion of other liabilities
 
$
6.8

$
2.9

Non-current portion of other liabilities
 
13.1

0.2

 
 
$
19.9

$
3.1

v3.10.0.1
INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2018
Income Taxes [Abstract]  
Income tax expense/(recoveries) components
Income tax expenses/(recoveries) consisted of the following components:
 
Years ended December 31,
 
2018
2017
Current income taxes:
 
 
Canadian current income taxes
$
3.3

$
3.0

Foreign current income taxes
41.8

56.7

 
45.1

59.7

Deferred income taxes:


Canadian deferred income taxes - origination and reversal of temporary differences
(3.5
)
4.6

Foreign deferred income taxes - origination and reversal of temporary differences
(3.6
)
32.5

Changes in tax rates or imposition of new taxes

0.8

 
(7.1
)
37.9

Total income tax expense
$
38.0

$
97.6

Income tax expense/(recoveries) rate reconciliation
These factors are illustrated below on all of the consolidated earnings before income taxes after applying a tax rate of 26.6%, reflecting the combined Canadian statutory corporate income tax rate which applies to the Company as a legal entity for the year ended December 31, 2018 (December 31, 2017 - 26.6%):
 
Years ended December 31,
 
2018
2017
Earnings before income taxes
$
18.3

$
608.1

Income tax provision - 26.6% (26.6% in 2017)
$
4.9

$
161.8

Increase (reduction) in income taxes resulting from:


Earnings in foreign jurisdictions subject to a different tax rate than 26.6%
(6.7
)
1.4

Permanent items that are not included in income / losses for tax purposes:


Non-deductible expenses
8.7

5.5

Income/(losses) not recognized for tax purposes
(1.2
)
(1.1
)
Tax provisions not based on legal entity income or losses for the year:


Provincial mining duty tax
(0.4
)
6.0

Non-resident withholding tax
2.2

2.6

Under/(over) tax provisions
1.6

6.0

Changes in tax rates

0.8

Other
0.1

(3.2
)
Other adjustments:


Unrecognized recoveries (expenses) in deferred tax provisions
30.1

(84.0
)
Foreign exchange related to deferred income taxes
(1.0
)
2.6

Other
(0.3
)
(0.8
)
Total income tax expense
$
38.0

$
97.6

Components of deferred income tax assets and liabilities
The components that give rise to deferred income tax assets and liabilities are as follows:
 
December 31,
December 31,
 
2018
2017
Deferred income tax assets:
 
 
Non-capital losses
$
105.2

$
71.9

Asset retirement obligations
2.8

2.5

Other
31.2

28.5

 
139.2

102.9

Deferred income tax liabilities:


Property, plant and equipment
(273.5
)
(253.9
)
Royalty interests
(7.2
)
(8.0
)
Other intangible assets

(0.2
)
Mining duties
(22.6
)
(26.1
)
Marketable securities

(1.5
)
Inventory and Reserves
(21.5
)
(6.5
)
Other
(2.6
)
(4.9
)
 
(327.4
)
(301.1
)
Net deferred income tax liabilities
$
(188.2
)
$
(198.2
)
 
 
 
Classification:
 
 
Non-current assets
$

$

Non-current liabilities
$
(188.2
)
$
(198.2
)
 
$
(188.2
)
$
(198.2
)
The 2018 movement for net deferred income tax liabilities is summarized as follows:
 
December 31, 2017
Statements
of earnings
Other comprehensive income
Other
December 31, 2018
Deferred income tax assets:
 
 
 
 
 
Non-capital losses
$
71.9

$
33.3

$

$

$
105.2

Asset retirement obligations
2.5

0.3



2.8

Other assets
28.5

1.5

1.2


31.2

Deferred income tax liabilities:
 
 
 
 
 
Property, plant and equipment
(253.9
)
(19.6
)


(273.5
)
Royalty interests
(8.0
)
0.8



(7.2
)
Other intangible assets
(0.2
)
0.2




Mining duties
(26.1
)
3.5



(22.6
)
Marketable securities
(1.5
)
(0.3
)
1.8



Inventories and Reserves
(6.5
)
(15.0
)


(21.5
)
Other
(4.9
)
2.4


(0.1
)
(2.6
)
 
$
(198.2
)
$
7.1

$
3.0

$
(0.1
)
$
(188.2
)
The 2017 movement for net deferred income tax liabilities is summarized as follows:
 
December 31, 2016
Statements
of earnings
Other comprehensive income
Other
December 31, 2017
Deferred income tax assets:
 
 
 
 
 
Exploration and evaluation assets
$
109.1

$
(109.1
)
$

$

$

Non-capital losses

71.9



71.9

Asset retirement obligations
3.7

(1.2
)


2.5

Other assets
10.3

18.2



28.5

Deferred income tax liabilities:





Property, plant and equipment
(213.6
)
(40.3
)


(253.9
)
Royalty interests
(7.7
)
(0.3
)


(8.0
)
Other intangible assets
(0.5
)
0.3



(0.2
)
Mining duties
(19.7
)
(6.4
)


(26.1
)
Marketable securities
(0.9
)

(0.6
)

(1.5
)
Inventories and Reserves
(10.1
)
3.6



(6.5
)
Other
(29.6
)
25.4

(0.3
)
(0.4
)
(4.9
)
 
$
(159.0
)
$
(37.9
)
$
(0.9
)
$
(0.4
)
$
(198.2
)
Income tax expense/(recoveries) related to OCI
Income tax expenses/(recoveries) related to OCI consisted of the following components:
 
Years ended December 31,
 
2018
2017
Unrealized change in fair value of marketable securities
$
(1.8
)
$
0.6

Hedges
(1.2
)
0.3

Total income taxes related to OCI
$
(3.0
)
$
0.9

Disclosure of unrecognized deferred income tax assets
Deferred income tax assets have not been recognized in respect of the following deductible temporary differences:
 
December 31,
December 31,
 
2018
2017
Non-capital losses
$
550.4

$
619.0

Net capital losses
72.5

82.9

Exploration and evaluation assets
497.8

306.4

Deduction for future mining duty taxes
22.6

26.1

Asset retirement obligations
163.1

157.5

Other deductible temporary differences
44.2

41.1

 
$
1,350.6

$
1,233.0


The net capital loss carry forwards are restricted in use against capital gains but may be carried forward indefinitely. The exploration and evaluation assets may be carried forward indefinitely. At December 31, 2018, the non-capital loss carry forwards expire as follows:
Expiry Date
2019
2020
2021
2022
2023+
No Expiry
Total
Total unrecognized losses
$1.6
$0.7
$1.1
$1.9
$432.8
$112.3
$550.4
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES (Tables)
12 Months Ended
Dec. 31, 2018
Financial Instruments [Abstract]  
Contractual maturities of notes
The following are the contractual maturities related to the Notes, including interest payments:
 
Payments due by period
Notes balance as at
Carrying amount1
Contractual cash flows
<1 yr
1-2 yrs
3-5 yrs
>5 yrs
December 31, 2018
$
400.0

$
582.0

$
28.0

$
56.0

$
56.0

$
442.0

December 31, 2017
$
400.0

$
610.0

$
28.0

$
56.0

$
56.0

$
470.0

1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of the Notes of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million). The carrying amount of the long-term debt also excludes the embedded derivative.
v3.10.0.1
FINANCIAL INSTRUMENTS (Tables)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Financial Instruments [Abstract]    
Financial assets measured at fair value
 
Years ended December 31,
 
2018
2017
Proceeds from sale of marketable securities
$
0.9

$
14.5

Acquisition date fair value of marketable securities sold
(1.3
)
(25.4
)
Loss on sale of marketable securities recorded in OCI
$
(0.4
)
$
(10.9
)

 
Disclosure of detailed information about hedging instruments
Additional information on hedging instruments and hedged forecast transactions related to currency exchange rate risk as at December 31, 2018 and December 31, 2017 is as follows:
 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2018
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Canadian dollar option contracts
$

$
(4.5
)
$
(0.5
)
$
(0.5
)
$
0.5

Canadian forward contracts

(0.6
)
(0.6
)
(0.6
)
0.6

Euro option contracts

(0.2
)



 
$

$
(5.3
)
$
(1.1
)
$
(1.1
)
$
1.1

 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2017
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged
items
Canadian option contracts
$
5.3

$

$
4.5

$
4.5

$
(4.5
)
Euro option contracts
4.4


3.8

3.8

(3.8
)
 
$
9.7

$

$
8.3

$
8.3

$
(8.3
)
Additional information on hedging instruments and hedged forecast transactions related to oil and fuel market price risk as at December 31, 2018 and December 31, 2017 was as follows:
 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2018
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Brent crude oil option contracts
$
0.1

$
(2.6
)
$
(1.0
)
$
(1.0
)
$
1.0

WTI crude oil option contracts

(2.7
)



 
$
0.1

$
(5.3
)
$
(1.0
)
$
(1.0
)
$
1.0

 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2017
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Brent crude oil option contracts
$
6.1

$

$
2.7

$
2.7

$
(2.7
)
WTI crude oil option contracts
2.7


0.1

0.1

(0.1
)
 
$
8.8

$

$
2.8

$
2.8

$
(2.8
)
 
Gain (loss) recognized in cash flow hedge reserve
(Gain) loss reclassified or adjusted from cash flow hedge reserve
 
Year ended December 31, 2018
Year ended December 31, 2017
Year ended December 31, 2018
Year ended December 31, 2017
 
Exchange rate risk
 
 
 
 
Canadian dollar forward contracts
$
(0.6
)
$

$

$

Canadian dollar option contracts
(3.6
)
6.8

(1.4
)
(2.5
)
Euro option contracts
(1.2
)
6.5

(2.6
)
(2.3
)
Crude oil option contracts
4.3

3.2

(8.0
)
(0.3
)
 
(1.1
)
16.5

(12.0
)
(5.1
)
Time value of option contracts excluded from hedge relationship
(15.8
)
(1.9
)


 
$
(16.9
)
$
14.6

$
(12.0
)
$
(5.1
)

 
Gain reclassified or adjusted from cash flow hedge reserve to:
 
Year ended December 31, 2018
Year ended December 31, 2017
 
Consolidated balance sheets
 
 
Property, plant and equipment
$
(1.1
)
$
(1.1
)
Consolidated statements of earnings


 
Cost of sales
(10.5
)
(3.3
)
General and administrative expenses
(0.4
)
(0.7
)
Total
$
(12.0
)
$
(5.1
)
 
Disclosure of terms and conditions of outstanding derivative contracts
As at December 31, 2018, the Company's outstanding derivative contracts which qualified for hedge accounting, and the periods in which the cash flows are expected to occur and impact the Consolidated statements of earnings and Property, plant and equipment balance are as follows:
 
2019

2020

Total

Cash flow hedges
 
 
 
Exchange rate risk
 
 
 
   Canadian dollar option contracts (millions of C$)
282

186

468

   Rate range ($/C$)1
1.25-1.39

1.30-1.36

 
   Euro option contracts (millions of €)
96


96

Rate range (€/$)2
1.13-1.20


 
1
The Company executed Canadian dollar collar options, which consist of Canadian dollar call and put options. The strike prices for the call options are C$1.25 and C$1.30. The strike prices for the put options are C$1.39 and C$1.36. The Company will recognize a gain from the difference between a lower market price and the Canadian dollar call strike price. The Company will incur a loss from the difference between a higher market price and the Canadian dollar put strike price.
2
The Company executed euro collar options, which consist of euro put and call options. The strike price for the put options is €1.13. The strike price for the call options is €1.20. The Company will incur a loss from the difference between a lower market price and the euro put strike price. The Company will recognize a gain from the difference between a higher market price and the euro call strike price.
As at December 31, 2018, the Company’s outstanding crude oil derivative contracts, which qualified for hedge accounting, and the periods in which the cash flows are expected to occur and impact the Consolidated statements of earnings, are as follows:
 
2019

2020

2021

2022

2023

Total

Brent crude oil option contracts (barrels)1
654

573

588

420


2,235

Option contracts with strike prices at ($/barrel)2
44-65

50-65

54-65

53-65


 
WTI crude oil option contracts (barrels)1
498

489

456

348

348

2,139

Option contracts with strike prices at ($/barrel)2
40-60

43-60

46-62

45-62

47-60

 
1
Quantities of barrels are in thousands.
2
The Company executed Brent and WTI collar options, which consist of Brent and WTI put and call options with strike prices within the given range in 2019 through 2023. The Company will incur a loss from the difference between a lower market price and the put strike price. The Company will recognize a gain from the difference between a higher market price and the call strike price.
 
Sensitivity analysis for types of market risk
The table below sets out the fair value as at December 31, 2018, and what the fair value would have been based on an increase or a decrease of 10% of the price. The entire change in fair value would be recorded in the Consolidated statements of comprehensive income as Other comprehensive income.
 
December 31,
2018
Increase of 10%
Decrease of 10%
Brent crude oil option contracts
$
(2.5
)
$
4.3

$
(9.6
)
WTI crude oil option contracts
$
(2.7
)
$
7.2

$
(12.1
)
The table below sets out the fair value as at December 31, 2018, and what the fair value would have been based on an increase or decrease of 10% in the U.S. dollar exchange rate. The entire change in fair value would be recorded in the Consolidated statements of comprehensive income as Other comprehensive income.
 
December 31,
2018
Increase of 10%
Decrease of 10%
Canadian dollar (C$)
$
(5.1
)
$
(31.7
)
$
24.5

Euro (€)
$
(0.2
)
$
9.0

$
(7.8
)
 
Disclosure of detailed information about hedged items
Additional information on hedging instruments and hedged forecast transactions related to currency exchange rate risk as at December 31, 2018 and December 31, 2017 is as follows:
 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2018
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Canadian dollar option contracts
$

$
(4.5
)
$
(0.5
)
$
(0.5
)
$
0.5

Canadian forward contracts

(0.6
)
(0.6
)
(0.6
)
0.6

Euro option contracts

(0.2
)



 
$

$
(5.3
)
$
(1.1
)
$
(1.1
)
$
1.1

 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2017
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged
items
Canadian option contracts
$
5.3

$

$
4.5

$
4.5

$
(4.5
)
Euro option contracts
4.4


3.8

3.8

(3.8
)
 
$
9.7

$

$
8.3

$
8.3

$
(8.3
)
Additional information on hedging instruments and hedged forecast transactions related to oil and fuel market price risk as at December 31, 2018 and December 31, 2017 was as follows:
 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2018
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Brent crude oil option contracts
$
0.1

$
(2.6
)
$
(1.0
)
$
(1.0
)
$
1.0

WTI crude oil option contracts

(2.7
)



 
$
0.1

$
(5.3
)
$
(1.0
)
$
(1.0
)
$
1.0

 
Carrying amount
 
Fair value changes used for calculating hedge ineffectiveness
As at December 31, 2017
Assets
Liabilities
Accumulated cash flow hedge fair value reserve (before tax)
Hedging instruments
Hedged items
Brent crude oil option contracts
$
6.1

$

$
2.7

$
2.7

$
(2.7
)
WTI crude oil option contracts
2.7


0.1

0.1

(0.1
)
 
$
8.8

$

$
2.8

$
2.8

$
(2.8
)
 
Disclosure of detailed information about non-hedge derivatives  
 
 
Years ended December 31,
 
Notes
2018
2017
Embedded derivative
20(a)
$
(6.1
)
$
2.6

Warrants
 
(3.0
)
0.5

 
32
$
(9.1
)
$
3.1

v3.10.0.1
FAIR VALUE MEASUREMENTS (Tables)
12 Months Ended
Dec. 31, 2018
Fair Value Measurement [Abstract]  
Fair value measurement of assets
The Company’s fair values of financial assets and liabilities were as follows:
 
December 31, 2018
 
Carrying Amount
Level 1
Level 2
Level 3
Total Fair Value
Assets
 
 
 
 
 
Cash and cash equivalents
$
615.1

$
615.1

$

$

$
615.1

Short-term investments
119.0

119.0



119.0

Restricted cash
23.9

23.9



23.9

Marketable securities and warrants
15.3

6.9

2.4

6.0

15.3

Bond fund investments
1.0

1.0



1.0

Derivatives
 
 
 
 
 
Crude oil contracts
0.1


0.1


0.1

Embedded derivative
0.7


0.7


0.7

 
$
775.1

$
765.9

$
3.2

$
6.0

$
775.1

Liabilities
 
 
 
 
 
Derivatives
 
 
 
 
 
Currency contracts
$
(5.3
)
$

$
(5.3
)
$

$
(5.3
)
Crude oil contracts
(5.3
)

(5.3
)

(5.3
)
Long-term debt - 7% Senior Notes1
(400.0
)
(381.2
)


(381.2
)
 
$
(410.6
)
$
(381.2
)
$
(10.6
)
$

$
(391.8
)
 
 
December 31, 2017
 
Carrying Amount
Level 1
Level 2
Level 3
Total Fair Value
Assets
 
 
 
 
 
Cash and cash equivalents
$
664.1

$
664.1

$

$

$
664.1

Restricted cash
24.5

24.5



24.5

Short-term investments
127.2

127.2



127.2

Marketable securities and warrants
24.2

18.8

5.4


24.2

Bond fund investments
1.9

1.9



1.9

Derivatives
 
 
 
 
 
Currency contracts
9.7


9.7


9.7

Crude oil contracts
8.8


8.8


8.8

Embedded derivative
6.8


6.8


6.8

 
$
867.2

$
836.5

$
30.7

$

$
867.2

Liabilities
 
 
 
 
 
Long-term debt - 7% Senior Notes1
$
(400.0
)
$
(413.9
)
$

$

$
(413.9
)
1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of the Notes of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million). The carrying amount of the long-term debt also excludes the embedded derivative.
Fair value measurement of liabilities
The Company’s fair values of financial assets and liabilities were as follows:
 
December 31, 2018
 
Carrying Amount
Level 1
Level 2
Level 3
Total Fair Value
Assets
 
 
 
 
 
Cash and cash equivalents
$
615.1

$
615.1

$

$

$
615.1

Short-term investments
119.0

119.0



119.0

Restricted cash
23.9

23.9



23.9

Marketable securities and warrants
15.3

6.9

2.4

6.0

15.3

Bond fund investments
1.0

1.0



1.0

Derivatives
 
 
 
 
 
Crude oil contracts
0.1


0.1


0.1

Embedded derivative
0.7


0.7


0.7

 
$
775.1

$
765.9

$
3.2

$
6.0

$
775.1

Liabilities
 
 
 
 
 
Derivatives
 
 
 
 
 
Currency contracts
$
(5.3
)
$

$
(5.3
)
$

$
(5.3
)
Crude oil contracts
(5.3
)

(5.3
)

(5.3
)
Long-term debt - 7% Senior Notes1
(400.0
)
(381.2
)


(381.2
)
 
$
(410.6
)
$
(381.2
)
$
(10.6
)
$

$
(391.8
)
 
 
December 31, 2017
 
Carrying Amount
Level 1
Level 2
Level 3
Total Fair Value
Assets
 
 
 
 
 
Cash and cash equivalents
$
664.1

$
664.1

$

$

$
664.1

Restricted cash
24.5

24.5



24.5

Short-term investments
127.2

127.2



127.2

Marketable securities and warrants
24.2

18.8

5.4


24.2

Bond fund investments
1.9

1.9



1.9

Derivatives
 
 
 
 
 
Currency contracts
9.7


9.7


9.7

Crude oil contracts
8.8


8.8


8.8

Embedded derivative
6.8


6.8


6.8

 
$
867.2

$
836.5

$
30.7

$

$
867.2

Liabilities
 
 
 
 
 
Long-term debt - 7% Senior Notes1
$
(400.0
)
$
(413.9
)
$

$

$
(413.9
)
1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of the Notes of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million). The carrying amount of the long-term debt also excludes the embedded derivative.
Fair value of marketable securities and warrants
Marketable securities included in level 3
 
Balance, December 31, 2017
$

Shares received
6.0

Change in fair value reported in Other comprehensive income, net of income taxes

Balance, December 31, 2018
$
6.0

v3.10.0.1
CAPITAL MANAGEMENT (Tables)
12 Months Ended
Dec. 31, 2018
Corporate Information And Statement Of IFRS Compliance [Abstract]  
Disclosure of Capital Items
 
Notes
December 31, 2018
December 31, 2017
Cash and cash equivalents
7
$
615.1

$
664.1

Short-term investments
8
119.0

127.2

 
 
$
734.1

$
791.3

Capital items:
 



Credit facility available for use
20(b)
$
499.6

$
248.7

Long-term debt1
20(a)
400.0

400.0

Common shares
 
2,680.1

2,677.8

 
 
$
3,579.7

$
3,326.5

1
The carrying amount of the long-term debt excludes unamortized deferred transaction costs of $5.0 million as at December 31, 2018 (December 31, 2017$5.8 million).
v3.10.0.1
SHARE CAPITAL (Tables)
12 Months Ended
Dec. 31, 2018
Share Capital, Reserves And Other Equity Interest [Abstract]  
Outstanding common stock rollforward
 
Years ended December 31,
Number of common shares (in millions)
2018
2017
Outstanding, beginning of the year
465.9

453.8

Equity issuance

7.9

Issuance of flow-through common shares

3.4

Issuance of shares for share-based compensation
0.9

0.8

Outstanding, end of the year
466.8

465.9

v3.10.0.1
NON-CONTROLLING INTERESTS (Tables)
12 Months Ended
Dec. 31, 2018
Noncontrolling Interest Disclosure [Abstract]  
Financial information of subsidiaries with material non-controlling interests
Financial information of subsidiaries that have material non-controlling interests are provided below:
 
 
 
December 31, 2018
December 31, 2017
 
 
 
 Essakane
Rosebel
Essakane
Rosebel
Percentage of voting rights held by non-controlling interests
10%
5%
10%
5%
Accumulated non-controlling interest
$
30.3

$
25.3

$
25.5

$
25.9

Net earnings attributable to non-controlling interests
$
5.8

$
0.9

$
0.6

$
5.7

Dividends paid to non-controlling interests1
$
1.0

$
1.5

$
1.0

$
1.0

1
For the year ended December 31, 2018, dividends paid to other non-controlling interests amounted to $1.2 million (December 31, 2017 – $1.1 million).
Selected summarized information relating to these subsidiaries are provided below, before any intercompany eliminations:
 
 
 
December 31, 2018
December 31, 2017
 
 
 
Essakane
Rosebel
 Essakane
Rosebel
Current assets
$
245.1

$
172.8

$
220.5

$
181.0

Non-current assets
865.8

675.1

848.4

645.4

Current liabilities
(96.7
)
(68.4
)
(88.1
)
(72.4
)
Non-current liabilities
(543.5
)
(221.7
)
(552.6
)
(183.6
)
Net assets
$
470.7

$
557.8

$
428.2

$
570.4

 
 
 
Year ended
Year ended
 
 
 
December 31, 2018
December 31, 2017
Revenues
 
 
$
564.1

$
386.0

$
547.4

$
385.6

Net earnings and other comprehensive income
$
52.1

$
17.3

$
8.2

$
113.1

 
 









Net cash from operating activities
$
181.8

$
61.6

$
215.5

$
124.5

Net cash used in investing activities
(161.4
)
(67.9
)
(85.7
)
(63.1
)
Net cash used in financing activities
(45.2
)
(36.1
)
(127.7
)
(25.5
)
Net increase (decrease) in cash and cash equivalents
$
(24.8
)
$
(42.4
)
$
2.1

$
35.9

v3.10.0.1
EARNINGS PER SHARE (Tables)
12 Months Ended
Dec. 31, 2018
Earnings per share [abstract]  
Earnings (loss) per share computations
Basic earnings (loss) per share computation
 
Years ended December 31,
 
2018
2017
Numerator
 
 
Net earnings (loss) attributable to equity holders of IAMGOLD
$
(28.2
)
$
501.6

Denominator (in millions)


Weighted average number of common shares (basic)
466.5

463.0

Basic earnings (loss) attributable to equity holders of IAMGOLD ($/share)
$
(0.06
)
$
1.08


Diluted earnings (loss) per share computation
 
Years ended December 31,
 
2018
2017
Denominator (in millions)
 
 
Weighted average number of common shares (basic)
466.5

463.0

Dilutive effect of share options

1.2

Dilutive effect of full value award units

3.3

Weighted average number of common shares (diluted)
466.5

467.5

Diluted earnings (loss) attributable to equity holders of IAMGOLD ($/share)
$
(0.06
)
$
1.07

Equity instruments excluded from the computation of diluted earnings per share, which could be dilutive in the future, were as follows:
 
 
Years ended December 31,
(in millions)
Notes
2018
2017
Share options
27(a)
7.1

2.4

Full value awards
27(b)
5.2


Contingently issuable shares
24
1.0

2.1

 
 
13.3

4.5

 
v3.10.0.1
SHARE-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-Based Payment Arrangements [Abstract]    
Share-based compensation plans
 
Years ended December 31,
 
2018
2017
Share option award plan
$
2.3

$
2.0

Full value award plans
6.1

3.9

 
$
8.4

$
5.9

 
Share option award plan
 
Year ended
December 31, 2018
Year ended
December 31, 2017
 
Share
options
(in millions)

Weighted
average
exercise
price (C$/share)
1

Share
options
(in millions)

Weighted
average
exercise
price (C$/share)
1

Outstanding, beginning of the year
6.7

$
6.81

6.0

$
7.79

Granted
1.0

6.83

1.6

5.24

Exercised
(0.1
)
4.48

(0.2
)
4.23

Forfeited and expired
(0.5
)
17.08

(0.7
)
12.87

Outstanding, end of the year
7.1

$
6.15

6.7

$
6.81

Exercisable, end of the year
3.7

$
7.16

3.3

$
9.10

1
Exercise prices are denominated in Canadian dollars. The exchange rate at December 31, 2018 between the U.S. dollar and Canadian dollar was
$0.7329/C$.
 
Disclosure of number and weighted average remaining contractual life of outstanding share options  
The following table summarizes information related to share options outstanding at December 31, 2018:
Range of Prices
C$/share
Number
Outstanding
(millions)
Weighted Average Remaining Contractual Life (years)
Weighted Average Exercise Price
(C$/share)
1.01 - 5.00
2.7
3.2
$3.56
  5.01 - 10.00
3.6
4.2
6.41
10.01 - 15.00
0.8
0.3
13.17
 
7.1
3.4
$6.15
Weighted average inputs used in determining the fair value of the options granted
The following were the weighted average inputs to the Black-Scholes model used in determining the fair value of the options granted. The estimated fair value of the options is expensed over their expected life.

Years ended December 31,

2018
2017
Weighted average risk-free interest rate
2
%
1.1
%
Weighted average expected volatility1
65
%
66
%
Weighted average dividend yield
0.00
%
0.00
%
Weighted average expected life of options issued (years)
5.0

5.0

Weighted average grant-date fair value (C$ per share)
$
3.77

$
2.89

Weighted average share price at grant date (C$ per share)
$
6.83

$
5.24

Weighted average exercise price (C$ per share)
$
6.83

$
5.24

1
Expected volatility is estimated by considering historic average share price volatility based on the average expected life of the options
The following were the weighted average inputs to the Black-Scholes model used in determining the fair value of the deferred share units granted. The estimated fair value of the awards is expensed over their vesting period.
 
Years ended December 31,
 
2018
2017
Weighted average risk-free interest rate
1.7
%
0.7
%
Weighted average expected volatility1
44
%
76
%
Weighted average dividend yield
0.00
%
0.00
%
Weighted average expected life of deferred share units issued (years)
1.0

1.0

Weighted average grant-date fair value (C$ per share)
$
7.26

$
5.19

Weighted average share price at grant date (C$ per share)
$
7.26

$
5.19

1
Expected volatility is estimated by considering historic average share price volatility based on the average expected life of the units.
 
Full value awards consisting of restricted share units
A summary of the status of the Company’s deferred share units and restricted share units issued to employees and directors under the full value award plan and changes during the year is presented below.
 
Years ended December 31,
(in millions)
2018
2017
Outstanding, beginning of the year
4.6

3.7

Granted
2.0

2.2

Issued
(0.8
)
(0.6
)
Forfeited
(0.6
)
(0.7
)
Outstanding, end of the year
5.2

4.6

 
Weighted average inputs used in determining fair value of restricted share units  
The following were the weighted average inputs to the Black-Scholes model used in determining the fair value of the restricted share units granted. The estimated fair value of the awards is expensed over their vesting period.

Years ended December 31,

2018
2017
Weighted average risk-free interest rate
1.9
%
0.8
%
Weighted average expected volatility1
64
%
72
%
Weighted average dividend yield
0.00
%
0.00
%
Weighted average expected life of restricted share units issued (years)
3.0

2.9

Weighted average grant-date fair value (C$ per share)
$
6.76

$
5.24

Weighted average share price at grant date (C$ per share)
$
6.76

$
5.24

1
Expected volatility is estimated by considering historic average share price volatility based on the average expected life of the restricted share units.
v3.10.0.1
COST OF SALES (Tables)
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Components of cost of sales
 
Years ended December 31,
 
2018
2017
Operating costs1
$
662.2

$
632.3

Royalties
46.5

44.3

Depreciation expense2
265.4

265.4

 
$
974.1

$
942.0

1
Operating costs include mine production, transport and smelter costs, and site administrative expenses.
2
Depreciation expense excludes depreciation related to Corporate assets, which is included in General and administrative expenses.
v3.10.0.1
GENERAL AND ADMINSTRATIVE EXPENSES (Tables)
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Disclosure of General and Administrative Expenses
 
 
Years ended December 31,
 
Notes
2018
2017
Salaries
 
$
23.1

$
24.0

Director fees and expenses
 
0.9

1.0

Professional and consulting fees
 
5.6

5.8

Other administration costs
 
4.7

4.4

Share-based compensation
 
7.4

5.2

Gain on cash flow hedge
21(c)
(0.4
)
(0.7
)
Depreciation expense
 
0.8

0.6

 
 
$
42.1

$
40.3

v3.10.0.1
OTHER EXPENSES (Tables)
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Disclosure of other expenses (income)
 
 
Years ended December 31,
 
Notes
2018
2017
Changes in asset retirement obligations at closed sites
17(a)
$
7.3

$
7.5

Write-down of assets
 
9.2

2.5

Other
 
5.0

8.3

 
 
$
21.5

$
18.3

v3.10.0.1
FINANCE COSTS (Tables)
12 Months Ended
Dec. 31, 2018
Borrowing costs [abstract]  
Components of financing costs
 
 
Years ended December 31,
 
Notes
2018
2017
Interest expense
 
$
2.7

$
7.1

Credit facility fees
 
4.9

2.9

Accretion expense
17(a)
1.2

0.9

 
 
$
8.8

$
10.9

v3.10.0.1
INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES) (Tables)
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Schedule of Interest Income and Derivatives and Other Investment Gains
 
 
Years ended December 31,
 
Notes
2018
2017
Interest income
 
$
13.3

$
9.4

Gain (loss) on non-hedge derivatives and warrants
21(d)
(9.1
)
3.1

Gain on sale of a 30% interest in the Côté Gold Project
10

19.2

Amortization of gains related to flow-through common shares
24

3.6

Loss on redemption of 6.75% Senior Notes
20(a)

(20.2
)
Write-down of related party loan receivable
37
(10.9
)

Other gains
 
0.7

1.6

 
 
$
(6.0
)
$
16.7

v3.10.0.1
EXPENSES BY NATURE (Tables)
12 Months Ended
Dec. 31, 2018
Analysis of income and expense [abstract]  
Summary of Expenses by Nature
The following employee benefits expenses are included in cost of sales, general and administrative expenses, and exploration expenses.
 
Years ended December 31,
 
2018
2017
Salaries, short-term incentives, and other benefits
$
210.2

$
208.7

Share-based compensation
8.0

5.5

Other
3.8

3.3

 
$
222.0

$
217.5

v3.10.0.1
CASH FLOW ITEMS (Tables)
12 Months Ended
Dec. 31, 2018
Cash Flow Statement [Abstract]  
Schedule of Other Non-cash Items, Operating Activities
Adjustments for other non-cash items within operating activities
 
 
Years ended December 31,
 
Notes
2018
2017
Share-based compensation
27
$
8.4

$
5.9

Effects of exchange rate fluctuation on restricted cash
 
0.3

(1.6
)
Amortization of gains related to flow-through common shares
32

(3.6
)
Changes in estimates of environmental indemnities at closed sites
30
7.3

7.5

Other
 
2.7

1.4

 
 
$
18.7

$
9.6

Schedule of Changes in Non-cash Working Capital Items and Non-current Ore Stockpiles
Movements in non-cash working capital items and non-current ore stockpiles
 
Years ended December 31,
 
2018
2017
Receivables and other current assets
$
(11.9
)
$
(1.8
)
Inventories and non-current ore stockpiles
(87.8
)
(21.3
)
Accounts payable and accrued liabilities
2.4

24.4

 
$
(97.3
)
$
1.3

Schedule of Other Investing Activities
Other investing activities
 
 
Years ended December 31,
 
Notes
2018
2017
Disposal (acquisition) of investments
 
$
(8.0
)
$
9.0

Advances to related parties
37
(1.2
)
(5.9
)
Repayments from related parties
37
12.6

1.0

Prepayment for other assets
 
(2.9
)

Other
 

0.3

 
 
$
0.5

$
4.4

Schedule of Reconciliation of Long-term Debt Arising from Financing Activities
Reconciliation of long-term debt arising from financing activities     
 
Notes

2018
2017
Balance, beginning of the year
 
$
391.6

$
485.1

Net proceeds from issuance of 7% Senior Notes
20(a)

393.6

Non-cash changes:
 


 
     Amortization of deferred financing charges
 
0.8

0.9

     Change in fair value of embedded derivative
21(d)
6.1

(2.6
)
     Loss on redemption of 6.75% Senior Notes
20(a)

20.2

     Repayment of 6.75% Senior Notes
20(a)

(505.6
)
 Balance, end of the year
 
$
398.5

$
391.6

v3.10.0.1
REVERSAL OF IMPAIRMENT CHARGES (Tables)
12 Months Ended
Dec. 31, 2018
Impairment Of Assets [Abstract]  
Disclosure of reversal of impairment loss


Years ended December 31,

Notes
2018
2017
Suriname CGU1





Property, plant and equipment
14
$

$
124.1

Côté Gold Project





Exploration and evaluation assets
15

400.0



$

$
524.1

1 The Suriname CGU consists of Rosebel Gold Mines N.V. and Euro Resources S.A.
v3.10.0.1
COMMITMENTS (Tables)
12 Months Ended
Dec. 31, 2018
Commitments [Abstract]  
Disclosure of commitments and payments due by period
 
December 31, 2018
December 31, 2017
Purchase obligations
$
110.2

$
76.4

Capital expenditure obligations
36.6

29.7

Finance lease obligations
9.8


Operating leases
16.3

17.5

 
$
172.9

$
123.6


(a)    Commitments – payments due by period
 
Payments due by period
As at December 31, 2018
Total
<1 yr
1-2 yrs
3-5 yrs
>5 yrs
Purchase obligations
$
110.2

$
107.2

$
2.0

$
0.8

$
0.2

Capital expenditure obligations
36.6

31.8

2.3

2.3

0.2

Finance lease obligations
9.8

2.4

4.9

2.5


Operating leases
16.3

6.5

8.2

0.6

1.0

 
$
172.9

$
147.9

$
17.4

$
6.2

$
1.4

Disclosure of Royalty Expense Commitments
Production from certain mining operations is subject to third party royalties (included in the Cost of sales) based on various methods of calculation summarized as follows:
 
December 31, 2018
December 31, 2017
Essakane1
$
25.0

$
22.3

Rosebel2
21.5

22.0

 
$
46.5

$
44.3

1
Royalty based on a percentage of gold sold applied to the gold market price the day before shipment; the royalty percentage varies according to the gold market price: 3% if the gold market price is lower or equal to $1,000 per ounce, 4% if the gold market price is between $1,000 and $1,300 per ounce, or 5% if the gold market price is above $1,300 per ounce.
2
2% in-kind royalty per ounce of gold production and price participation of 6.5% on the amount exceeding a market price of $425 per ounce when applicable, using for each calendar quarter the average market price determined by the London Gold Fix P.M. In addition, 0.25% of all minerals produced at Rosebel are payable to a charitable foundation for the purpose of promoting local development of natural resources within Suriname.
v3.10.0.1
RELATED PARTY TRANSACTIONS (Tables)
12 Months Ended
Dec. 31, 2018
Related Party [Abstract]  
Disclosure of transactions between related parties
Compensation breakdown for key management personnel, comprising of the Company’s directors and executive officers, is as follows:
 
Years ended December 31,
 
2018
2017
Salaries and other benefits1
$
7.1

$
5.4

Share-based payments
4.4

3.6

 
$
11.5

$
9.0

1
Salaries and other benefits include amounts paid to directors.
The Company had the following related party transactions included in Receivables and other current assets and in Other non-current assets in the Consolidated balance sheets:
 
 
Years ended December 31,
 
Notes
2018
2017
Sadiola and Yatela (Non-interest bearing)
 
 
 
Balance, beginning of the year
 
$
0.1

$
0.2

Advances
 
0.3

0.9

Repayments
 
(0.3
)
(1.0
)
Balance, end of the year
11
$
0.1

$
0.1

Sadiola Sulphide Project (LIBOR plus 2%)1
 
 


Balance, beginning of the year
 
$
36.3

$
31.3

Advances
 
0.9

5.0

  Repayments

 
(12.3
)

  Write-down of receivable2
32
(10.9
)

Balance, end of the year
16
$
14.0

$
36.3

1
These advances were part of an extended loan agreement, reached in the fourth quarter of 2016, for the Sadiola Sulphide Project, and are to be repaid on the earlier of December 31, 2020 or, at such time as Sadiola has sufficient free cash flow.
2Write-down of receivable due to a decrease in the fair value of collateral.

v3.10.0.1
SEGMENTED INFORMATION (Tables)
12 Months Ended
Dec. 31, 2018
Operating Segments [Abstract]  
Disclosure of operating segments
 
December 31, 2018
December 31, 2017
 
Total non-
current
assets
Total
assets
Total
liabilities
Total non-
current
assets
Total
assets
Total
liabilities
Gold mines
 
 
 
 
 
 
Burkina Faso

$
865.3

$
1,110.6

$
210.6

$
849.3

$
1,070.7

$
204.8

Suriname

674.3

847.1

292.9

643.3

825.4

256.0

Canada
717.2

747.7

207.1

697.0

717.0

205.3

Total gold mines
2,256.8

2,705.4

710.6

2,189.6

2,613.1

666.1

Exploration and evaluation and development
465.6

548.8

11.8

437.8

483.4

9.6

Corporate1
151.7

706.8

446.0

178.5

870.4

444.4

Total per consolidated financial statements
$
2,874.1

$
3,961.0

$
1,168.4

$
2,805.9

$
3,966.9

$
1,120.1

Incorporated joint ventures (Mali)2
$
103.1

$
166.0

$
123.6

$
128.9

$
179.9

$
149.6

1 The carrying amount of the Investment in incorporated joint ventures is included in the corporate segment as non-current assets.
2 The breakdown of the financial information for the incorporated joint ventures has been disclosed above as it is reviewed regularly by the Company's CODM to assess the performance of the incorporated joint ventures and to make resource allocation decisions.

Year ended December 31, 2018
 
Consolidated statements of earnings information
Net capital
expenditures
4
 
Revenues
Cost of
sales1
Depreciation
expense2
General 
and
administrative3
Exploration
Other
Earnings
(loss) from
operations
Gold mines
 
 
 
 
 
 
 
 
Burkina Faso

$
564.1

$
338.0

$
135.1

$

$

$
7.0

$
84.0

$
158.2

Suriname

386.0

260.7

82.7


4.6

1.6

36.4

64.7

Canada
160.5

110.0

45.0



7.4

(1.9
)
55.1

Total gold mines excluding incorporated joint ventures
1,110.6

708.7

262.8


4.6

16.0

118.5

278.0

Exploration and evaluation and development5




34.6

0.7

(35.3
)
17.8

Corporate6
0.4


2.6

42.1


4.8

(49.1
)
5.1

Total per consolidated financial statements
1,111.0

708.7

265.4

42.1

39.2

21.5

34.1

300.9

Incorporated joint ventures (Mali)7
76.5

55.0

1.8


0.2

3.5

16.0

1.2

 
$
1,187.5

$
763.7

$
267.2

$
42.1

$
39.4

$
25.0

$
50.1

$
302.1

1 Excludes depreciation expense.
2 Depreciation expense excludes depreciation related to Corporate assets, which is included in General and administrative expenses.
3 Includes depreciation expense relating to Corporate and Exploration and evaluation assets.
4 Includes cash expenditures for Property, plant and equipment, Exploration and evaluation assets and finance lease payments.
5 Closed site costs on Exploration and evaluation properties included in other expenses.
6 Includes earnings from royalty interests.
7 Net earnings from incorporated joint ventures are included in a separate line in the Consolidated statements of earnings. The breakdown of the financial information has been disclosed above as it is reviewed regularly by the Company’s CODM to assess its performance and to make resource allocation decisions.
Year ended December 31, 2017
 
Consolidated statements of earnings information
Net capital
expenditures
4
 
Revenues
Cost of
sales1
Depreciation
expense2
General
and
administrative3
Exploration
Impairments (reversals)
Other
Earnings
(loss) from
operations
Gold mines
 
 
 
 
 
 
 
 
 
Burkina Faso

$
547.4

$
340.1

$
132.6

$

$

$

$

$
74.7

$
82.4

Suriname

385.6

231.0

83.8


5.0

(116.0
)
2.7

179.1

59.4

Canada
161.5

105.5

45.3




6.2

4.5

61.1

Total gold mines excluding incorporated joint ventures
1,094.5

676.6

261.7


5.0

(116.0
)
8.9

258.3

202.9

Exploration and evaluation and development5


0.2

0.2

33.4

(400.0
)
0.9

365.3

5.3

Corporate6
0.4


3.5

40.1


(8.1
)
8.5

(43.6
)
2.3

Total per consolidated financial statements
1,094.9

676.6

265.4

40.3

38.4

(524.1
)
18.3

580.0

210.5

Incorporated joint ventures (Mali)7
82.1

59.4

1.6


1.4



19.7

10.0

 
$
1,177.0

$
736.0

$
267.0

$
40.3

$
39.8

$
(524.1
)
$
18.3

$
599.7

$
220.5

1
Excludes depreciation expense.
2
Depreciation expense excludes depreciation related to Corporate assets, which is included in General and administrative expenses.
3
Includes depreciation expense relating to Corporate and Exploration and evaluation assets.
4
Includes cash expenditures for Property, plant and equipment, Exploration and evaluation assets and finance lease payments.
5
Closed site costs on Exploration and evaluation properties included in other expenses.
6
Includes earnings from royalty interests.
7
Net earnings from incorporated joint ventures are included in a separate line in the Consolidated statements of earnings. The breakdown of the financial information has been disclosed above as it is reviewed regularly by the Company’s CODM to assess its performance and to make resource allocation decisions.
v3.10.0.1
BASIS OF PREPARATION (Details)
12 Months Ended
Feb. 28, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Essakane S.A.        
Disclosure of unconsolidated joint ventures/divisions [line items]        
Ownership interest in subsidiary/divisions   90.00% 90.00%  
Rosebel Gold Mines N.V.        
Disclosure of unconsolidated joint ventures/divisions [line items]        
Ownership interest in subsidiary/divisions   95.00% 95.00%  
Doyon division including the Westwood mine        
Disclosure of unconsolidated joint ventures/divisions [line items]        
Ownership interest in subsidiary/divisions   100.00% 100.00%  
Côté Gold        
Disclosure of unconsolidated joint ventures/divisions [line items]        
Ownership interest in subsidiary/divisions   70.00% 70.00%  
Euro Ressources S.A.        
Disclosure of unconsolidated joint ventures/divisions [line items]        
Ownership interest in subsidiary/divisions   90.00% 90.00%  
Merrex Gold Inc.        
Disclosure of unconsolidated joint ventures/divisions [line items]        
Ownership interest in subsidiary/divisions 100.00% 100.00% 100.00% 23.00%
Société d'Exploitation des Mines d'Or de Sadiola S.A.        
Disclosure of incorporated joint ventures [line items]        
Ownership interest in incorporated joint venture   41.00% 41.00%  
v3.10.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2018
Bottom of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Other intangible assets, useful life 2 years
Top of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Other intangible assets, useful life 20 years
Plant and Equipment | Bottom of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment useful life 3 years
Plant and Equipment | Top of range  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment useful life 15 years
Buildings  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment useful life 20 years
v3.10.0.1
ACQUISITION (Details) - USD ($)
shares in Millions, $ in Millions
14 Months Ended
Feb. 28, 2017
Feb. 27, 2019
Dec. 31, 2018
Dec. 31, 2017
Feb. 27, 2017
Dec. 31, 2016
Disclosure of detailed information about business combination [line items]            
Cash and cash equivalents acquired     $ 615.1 $ 664.1   $ 652.0
Exploration and evaluation assets     47.3 474.6    
Current liabilities     (227.2) (231.1)    
Other non-current liabilities     $ (13.1) $ (0.2)    
Merrex Gold Inc.            
Disclosure of detailed information about business combination [line items]            
Consideration transferred $ 27.5          
Transaction costs 0.2          
Cash and cash equivalents acquired 0.1          
Exploration and evaluation assets 36.6          
Current liabilities (3.9)          
Other non-current liabilities (0.4)          
Assets (liabilities) 32.3          
Issuance of common shares $ 27.4          
Merrex Gold Inc.            
Disclosure of detailed information about business combination [line items]            
Merrex Siribaya Project ownership percentage         50.00%  
Siribaya Project ownership percentage 100.00%       50.00%  
Number of shares issued as consideration 6.9          
Consideration transferred $ 27.5          
Transaction costs 0.2          
Cash and cash equivalents acquired $ 0.1          
Initial investment         $ 4.8  
Number of shares in entity held by entity or by its subsidiaries or associates         45.8  
Merrex Gold Inc. | Merrex Gold Inc.            
Disclosure of detailed information about business combination [line items]            
Proportion of ownership interest in associate   23.00%        
v3.10.0.1
CASH AND CASH EQUIVALENTS (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Subclassifications of assets, liabilities and equities [abstract]      
Cash $ 440.3 $ 489.2  
Short-term deposits with initial maturities of three months or less 174.8 174.9  
Cash and cash equivalents $ 615.1 $ 664.1 $ 652.0
v3.10.0.1
SHORT-TERM INVESTMENTS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items]    
Short-term investments $ 119.0 $ 127.2
Redemption notice period 185 days  
Money market funds    
Disclosure of detailed information about financial instruments [line items]    
Short-term investments $ 114.6 124.6
Other    
Disclosure of detailed information about financial instruments [line items]    
Short-term investments $ 4.4 $ 2.6
v3.10.0.1
RESTRICTED CASH (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Schedule Of Fair Value, Off-balance Sheet Risks1 [Line Items]    
Non-current restricted cash $ 23.9 $ 24.5
Essakane S.A.    
Schedule Of Fair Value, Off-balance Sheet Risks1 [Line Items]    
Non-current restricted cash 23.9 19.5
Rosebel Gold Mines N.V.    
Schedule Of Fair Value, Off-balance Sheet Risks1 [Line Items]    
Non-current restricted cash $ 0.0 $ 5.0
v3.10.0.1
CONSIDERATION RECEIVABLE (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 20, 2017
May 08, 2017
Dec. 31, 2018
Dec. 31, 2017
Disclosure of joint ventures [line items]        
Cash proceeds from sale of a 30% interest in the Côté Gold Project     $ 92.1 $ 96.5
Consideration receivable     0.0 93.8
Gain on sale of a 30% interest in the Côté Gold Project     $ 0.0 $ 19.2
Disposal Of Interest In Cote Gold Project        
Disclosure of joint ventures [line items]        
Proportion of ownership interest sold in joint venture 30.00% 30.00% 30.00% 30.00%
Aggregate consideration receivable   $ 195.0    
Cash proceeds from sale of a 30% interest in the Côté Gold Project $ 100.0      
Sale of ownership interest in joint venture, consideration receivable 95.0   $ 95.0  
Payments of transaction costs       $ 3.5
Sale of ownership interest in joint venture, consideration receivable, additional transactions costs     $ 2.9  
Consideration receivable       $ 93.8
Gain on sale of a 30% interest in the Côté Gold Project $ 19.2      
v3.10.0.1
RECEIVABLES AND OTHER CURRENT ASSETS (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract]    
Gold receivables $ 1.6 $ 0.0
Income taxes receivable 4.0 3.2
Receivables from governments 53.4 42.2
Receivables from related parties 0.1 0.1
Other receivables 4.1 6.7
Total receivables 63.2 52.2
Prepayment for other assets 2.9 0.0
Marketable securities 0.5 0.0
Prepaid expenses 11.4 9.6
Derivatives 0.1 14.1
Receivables and other current assets $ 78.1 $ 75.9
v3.10.0.1
INVENTORIES (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract]    
Finished goods $ 60.7 $ 52.8
Ore stockpiles 27.3 5.0
Mine supplies 186.7 142.2
Current inventories 274.7 200.0
Non-current ore stockpiles 202.9 177.6
Inventories 477.6 377.6
Non-current Ore Stockpiles and Finished Goods    
Disclosure of Inventories [Line Items]    
Inventory write-down 1.0 4.2
Mine Supplies    
Disclosure of Inventories [Line Items]    
Inventory write-down 3.9 10.0
Cost of Sales Related to Operating Below Normal Capacity    
Disclosure of Inventories [Line Items]    
Inventory write-down $ 0.0 $ 0.7
v3.10.0.1
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES (Details)
$ / shares in Units, shares in Millions, $ in Millions, $ in Millions
12 Months Ended
Mar. 02, 2017
USD ($)
shares
Mar. 02, 2017
CAD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Disclosure Of Joint Ventures, Associates And Subsidiaries [Line Items]        
Investments in associates and joint ventures, beginning balance     $ 69.0 $ 52.6
Purchase of additional shares of associate       7.4
Currency translation adjustment     (1.2) 0.8
Share of net earnings (loss), net of income taxes     12.6 15.0
Share of net earnings (loss) recorded as a reduction of the provision     (1.0) 0.1
Share of dividends received     (2.1) (2.1)
Acquisition of control over associate       (4.8)
Other     0.5  
Investments in associates and joint ventures, ending balance     76.8 69.0
Associates        
Disclosure Of Joint Ventures, Associates And Subsidiaries [Line Items]        
Investments in associates and joint ventures, beginning balance     7.7 5.7
Purchase of additional shares of associate       7.4
Currency translation adjustment     (1.2) 0.8
Share of net earnings (loss), net of income taxes     (1.5) (1.4)
Share of net earnings (loss) recorded as a reduction of the provision     0.0 0.0
Share of dividends received     0.0 0.0
Acquisition of control over associate       (4.8)
Other     0.0  
Investments in associates and joint ventures, ending balance     $ 5.0 $ 7.7
INV Metals Inc.        
Disclosure Of Joint Ventures, Associates And Subsidiaries [Line Items]        
Purchase of additional shares of associate $ 7.4 $ 9.8    
Proportion of ownership interest in associate     35.60% 35.60%
Additional associate shares acquired | shares 9.8 9.8    
Additional associate shares purchased (in cad per share) | $ / shares   $ 1.00    
Sadiola        
Disclosure Of Joint Ventures, Associates And Subsidiaries [Line Items]        
Investments in associates and joint ventures, beginning balance     $ 61.3 $ 46.9
Purchase of additional shares of associate       0.0
Currency translation adjustment     0.0 0.0
Share of net earnings (loss), net of income taxes     13.1 16.5
Share of net earnings (loss) recorded as a reduction of the provision     0.0 0.0
Share of dividends received     (2.1) (2.1)
Acquisition of control over associate       0.0
Other     0.5  
Investments in associates and joint ventures, ending balance     71.8 61.3
Yatela        
Disclosure Of Joint Ventures, Associates And Subsidiaries [Line Items]        
Investments in associates and joint ventures, beginning balance     0.0 0.0
Purchase of additional shares of associate       0.0
Currency translation adjustment     0.0 0.0
Share of net earnings (loss), net of income taxes     1.0 (0.1)
Share of net earnings (loss) recorded as a reduction of the provision     (1.0) 0.1
Share of dividends received     0.0 0.0
Acquisition of control over associate       0.0
Other     0.0  
Investments in associates and joint ventures, ending balance     $ 0.0 $ 0.0
v3.10.0.1
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES - Summary of Joint Ventures (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of joint ventures [line items]      
Carrying amount of interest in joint ventures $ 76.8 $ 69.0 $ 52.6
Sadiola      
Disclosure of joint ventures [line items]      
Ownership interest in joint venture 41.00% 41.00%  
Share of net assets (liabilities) of joint ventures $ 72.3 $ 61.3  
Loss applied to loans receivable 0.0 0.0  
Loss recognized in provision 0.0 0.0  
Other (0.5) 0.0  
Carrying amount of interest in joint ventures $ 71.8 $ 61.3 46.9
Yatela      
Disclosure of joint ventures [line items]      
Ownership interest in joint venture 40.00% 40.00%  
Share of net assets (liabilities) of joint ventures $ (30.1) $ (31.1)  
Loss applied to loans receivable 16.0 16.0  
Loss recognized in provision 14.1 15.1  
Other 0.0 0.0  
Carrying amount of interest in joint ventures $ 0.0 $ 0.0 $ 0.0
v3.10.0.1
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES - Summary Of Joint Venture Financial Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Summarized statements of earnings      
Revenues $ 1,111.0 $ 1,094.9  
Depreciation expense (265.4) (265.4)  
Other expenses (21.5) (18.3)  
Income taxes (38.0) (97.6)  
Comprehensive income (loss) (56.9) 528.0  
Assets      
Cash and cash equivalents 615.1 664.1 $ 652.0
Total non- current assets 2,874.1 2,805.9  
Assets 3,961.0 3,966.9  
Liabilities      
Current liabilities 227.2 231.1  
Non-current liabilities 941.2 889.0  
Liabilities 1,168.4 1,120.1  
Sadiola      
Summarized statements of earnings      
Revenues 180.9 192.5  
Depreciation expense (4.4) (4.0)  
Other expenses (143.1) (143.1)  
Income taxes (1.6) (5.2)  
Comprehensive income (loss) 31.8 40.2  
Assets      
Cash and cash equivalents 90.1 62.4  
Other current assets 55.0 53.8  
Total non- current assets 251.5 314.5  
Assets 396.6 430.7  
Liabilities      
Current liabilities 44.0 58.6  
Non-current liabilities 176.1 222.4  
Liabilities 220.1 281.0  
Share of net assets (liabilities) of joint ventures 176.5 149.7  
Yatela      
Summarized statements of earnings      
Revenues 6.0 7.7  
Depreciation expense 0.0 0.0  
Other expenses (3.8) (8.0)  
Income taxes 0.4 (0.1)  
Comprehensive income (loss) 2.6 (0.4)  
Assets      
Cash and cash equivalents 0.8 0.5  
Other current assets 7.6 7.9  
Total non- current assets 0.0 0.0  
Assets 8.4 8.4  
Liabilities      
Current liabilities 45.0 55.8  
Non-current liabilities 38.3 30.2  
Liabilities 83.3 86.0  
Share of net assets (liabilities) of joint ventures $ (74.9) $ (77.6)  
v3.10.0.1
INVESTMENTS IN ASSOCIATES AND INCORPORATED JOINT VENTURES - Summary of Associates Financial Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of associates [line items]    
Net earnings (loss) $ (19.7) $ 510.5
Other comprehensive income (loss) (37.2) 17.5
Comprehensive income (loss) (56.9) 528.0
Associates    
Disclosure of associates [line items]    
Net earnings (loss) (2.9) (3.1)
Other comprehensive income (loss) 1.3 (2.2)
Comprehensive income (loss) $ (1.6) $ (5.3)
v3.10.0.1
PROPERTY, PLANT AND EQUIPMENT - Property, Plant and Equipment Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year $ 1,940.2  
Balance, end of the year 2,436.1 $ 1,940.2
Gross carrying amount    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 4,431.7 4,226.2
Additions 294.6 232.3
Changes in asset retirement obligations 30.1 4.6
Disposals (84.1) (31.4)
Transfers within Property, plant and equipment 0.0 0.0
Transfers from Exploration and evaluation assets1 482.3  
Balance, end of the year 5,154.6 4,431.7
Gross carrying amount | Construction in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 7.1 2.8
Additions 41.0 20.9
Changes in asset retirement obligations 0.0 0.0
Disposals 0.0 0.0
Transfers within Property, plant and equipment (15.3) (16.6)
Transfers from Exploration and evaluation assets1 482.3  
Balance, end of the year 515.1 7.1
Gross carrying amount | Mining properties    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 2,486.1 2,336.5
Additions 162.1 128.3
Changes in asset retirement obligations 30.1 4.6
Disposals (0.3) (0.2)
Transfers within Property, plant and equipment 41.3 16.9
Transfers from Exploration and evaluation assets1 0.0  
Balance, end of the year 2,719.3 2,486.1
Gross carrying amount | Plant and equipment    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 1,938.5 1,886.9
Additions 91.5 83.1
Changes in asset retirement obligations 0.0 0.0
Disposals (83.8) (31.2)
Transfers within Property, plant and equipment (26.0) (0.3)
Transfers from Exploration and evaluation assets1 0.0  
Balance, end of the year $ 1,920.2 $ 1,938.5
v3.10.0.1
PROPERTY, PLANT AND EQUIPMENT - Accumulated Depreciation and Impairment Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year $ 1,940.2  
Balance, end of the year 2,436.1 $ 1,940.2
Accumulated depreciation, amortisation and impairment    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 2,491.5 2,358.0
Depreciation expense 302.1 285.7
Disposals (75.1) (28.1)
Reversal of impairment charges   (124.1)
Balance, end of the year 2,718.5 2,491.5
Accumulated depreciation, amortisation and impairment | Construction in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 0.0 0.0
Depreciation expense 0.0 0.0
Disposals 0.0 0.0
Reversal of impairment charges   0.0
Balance, end of the year 0.0 0.0
Accumulated depreciation, amortisation and impairment | Mining properties    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 1,469.2 1,481.5
Depreciation expense 140.4 111.8
Disposals 0.0 0.0
Reversal of impairment charges   (124.1)
Balance, end of the year 1,609.6 1,469.2
Accumulated depreciation, amortisation and impairment | Plant and equipment    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 1,022.3 876.5
Depreciation expense 161.7 173.9
Disposals (75.1) (28.1)
Reversal of impairment charges   0.0
Balance, end of the year 1,108.9 1,022.3
Gross carrying amount    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 1,940.2  
Balance, end of the year 2,436.1 1,940.2
Gross carrying amount | Construction in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 7.1  
Balance, end of the year 515.1 7.1
Gross carrying amount | Mining properties    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 1,016.9  
Balance, end of the year 1,109.7 1,016.9
Gross carrying amount | Plant and equipment    
Reconciliation of changes in property, plant and equipment [abstract]    
Balance, beginning of the year 916.2  
Balance, end of the year $ 811.3 $ 916.2
v3.10.0.1
PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items]    
Borrowing costs capitalised $ 28.1 $ 24.1
Mining properties, stripping costs capitalized 239.9 224.7
Mining properties, stripping costs capitalized during period 81.5 57.3
Mining properties, stripping costs, depreciation expense 66.3 47.4
Carrying amount of plant and equipment held under finance leases 9.1 0.2
Mining properties    
Disclosure of detailed information about property, plant and equipment [line items]    
Borrowing costs capitalised $ 21.9 $ 22.4
Borrowing costs capitalized, weighted average interest rate 7.24% 7.16%
v3.10.0.1
EXPLORATION AND EVALUATION ASSETS (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 20, 2017
May 08, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Reconciliation of changes in property, plant and equipment [abstract]          
Balance, beginning of the year     $ 1,940.2    
Exploration and evaluation expenditures     39.2 $ 38.4  
Reversal of impairment charge     0.0 524.1  
Balance, end of the year     2,436.1 1,940.2  
Borrowing costs capitalised     $ 28.1 $ 24.1  
Disposal Of Interest In Cote Gold Project          
Reconciliation of changes in property, plant and equipment [abstract]          
Proportion of ownership interest sold in joint venture 30.00% 30.00% 30.00% 30.00%  
Exploration and evaluation assets          
Reconciliation of changes in property, plant and equipment [abstract]          
Borrowing costs capitalised     $ 4.8 $ 1.9  
Capitalisation rate of borrowing costs eligible for capitalisation     7.24% 7.16%  
Exploration and evaluation assets          
Reconciliation of changes in property, plant and equipment [abstract]          
Balance, beginning of the year     $ 474.6 $ 169.2  
Exploration and evaluation expenditures     51.8 20.2  
Acquired Exploration and evaluation assets     3.2 52.5  
Reversal of impairment charge       400.0  
Transfers to Property, plant and equipment4     (482.3)    
Sale of a 30% interest in the Côté Gold Project       (167.3)  
Balance, end of the year     47.3 474.6 $ 169.2
Exploration and evaluation assets | Côté Gold Project          
Reconciliation of changes in property, plant and equipment [abstract]          
Balance, beginning of the year     395.7 154.9  
Exploration and evaluation expenditures     22.0 8.1  
Acquired Exploration and evaluation assets     0.0 0.0  
Reversal of impairment charge       400.0  
Transfers to Property, plant and equipment4     (417.7)    
Sale of a 30% interest in the Côté Gold Project       (167.3)  
Balance, end of the year     0.0 395.7 154.9
Exploration and evaluation assets | Saramacca Project          
Reconciliation of changes in property, plant and equipment [abstract]          
Balance, beginning of the year     37.1 10.0  
Exploration and evaluation expenditures     24.3 11.2  
Acquired Exploration and evaluation assets     3.2 15.9 10.0
Reversal of impairment charge       0.0  
Transfers to Property, plant and equipment4     (64.6)    
Sale of a 30% interest in the Côté Gold Project       0.0  
Balance, end of the year     0.0 37.1 10.0
Exploration and evaluation assets | Diakha-Siribaya Gold Project          
Reconciliation of changes in property, plant and equipment [abstract]          
Balance, beginning of the year     36.6 0.0  
Exploration and evaluation expenditures     0.0 0.0  
Acquired Exploration and evaluation assets     0.0 36.6  
Reversal of impairment charge       0.0  
Transfers to Property, plant and equipment4     0.0    
Sale of a 30% interest in the Côté Gold Project       0.0  
Balance, end of the year     36.6 36.6 0.0
Exploration and evaluation assets | Other Projects          
Reconciliation of changes in property, plant and equipment [abstract]          
Balance, beginning of the year     5.2 4.3  
Exploration and evaluation expenditures     5.5 0.9  
Acquired Exploration and evaluation assets     0.0 0.0  
Reversal of impairment charge       0.0  
Transfers to Property, plant and equipment4     0.0    
Sale of a 30% interest in the Côté Gold Project       0.0  
Balance, end of the year     10.7 $ 5.2 $ 4.3
Exploration and evaluation assets | Nelligan Project          
Reconciliation of changes in property, plant and equipment [abstract]          
Payments for exploration and evaluation expenses     1.7    
Exploration and evaluation assets | Boto Project          
Reconciliation of changes in property, plant and equipment [abstract]          
Payments for exploration and evaluation expenses     $ 3.8    
v3.10.0.1
EXPLORATION AND EVALUATION ASSETS - Narrative (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Nov. 29, 2018
Dec. 08, 2017
Nov. 27, 2017
Jun. 20, 2017
May 08, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 12, 2016
Disclosure of detailed information about property, plant and equipment [line items]                  
Assets           $ 3,961.0 $ 3,966.9    
Reversal of impairment charges           0.0 524.1    
Payments for upward adjustment to resource allocations           8.2 5.0    
Payment of finance lease obligations           (1.2) (0.1)    
Contingently Issuable Shares to the Government of Suriname                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Number of shares authorised 1,042   3,125            
Number of shares issued     1,042            
Shares issued during period, price per share (in dollars per share) $ 3.11                
Shares issued, closing price measurement period 20 days                
Payment of finance lease obligations $ 3.2                
Exploration and evaluation assets                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Acquired Exploration and evaluation assets           3.2 52.5    
Suriname Property                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Number of shares authorised     3,125           3,125
Number of shares issued     1,042            
Issuance of common shares     $ 5.9            
Saramacca Project                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Assets           64.6 37.1    
Payments for upward adjustment to resource allocations   $ 5.0              
Upward adjustment to resource allocations, amounts payable   $ 5.0              
Saramacca Project | Exploration and evaluation assets                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Acquired Exploration and evaluation assets           3.2 15.9 $ 10.0  
Exploration and evaluation assets                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Reversal of impairment charges           0.0 400.0    
Disposal Of Interest In Cote Gold Project                  
Disclosure of detailed information about property, plant and equipment [line items]                  
Assets           $ 417.7 $ 395.7    
Proportion of ownership interest sold in joint venture       30.00% 30.00% 30.00% 30.00%    
v3.10.0.1
OTHER NON-CURRENT ASSETS (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 06, 2017
Dec. 31, 2017
Dec. 31, 2018
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Net loan receivable from related party   $ 36.3 $ 14.0
Advances for the purchase of capital equipment   19.9 33.4
Royalty interests   5.6 5.6
Long-term prepayment   4.9 4.9
Derivatives   4.4 0.0
Other   5.5 4.8
Other assets   102.7 78.5
Contract term (in years) 15 years    
Prepayment issued during period   4.9  
Allowance for doubtful non-current non-trade receivables from related parties   36.0 46.9
Marketable securities and warrants      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Marketable securities and warrants and bond fund investments   24.2 14.8
Bond fund investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Marketable securities and warrants and bond fund investments   $ 1.9 $ 1.0
v3.10.0.1
PROVISIONS (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of other provisions [line items]      
Other provisions $ 350,400,000 $ 316,100,000  
Other current provisions (9,000,000) (17,100,000)  
Non-current provisions 341,400,000 299,000,000  
Advances 900,000 0  
Expense of restructuring activities   0  
Asset retirement obligations      
Disclosure of other provisions [line items]      
Other Provisions, Other Changes 200,000 0  
Other provisions 327,600,000 292,800,000 $ 285,100,000
Other current provisions (7,800,000) (10,800,000)  
Non-current provisions 319,800,000 282,000,000  
Yatela loss provision1      
Disclosure of other provisions [line items]      
Other provisions 13,200,000 15,100,000  
Other      
Disclosure of other provisions [line items]      
Other provisions $ 9,600,000 $ 8,200,000  
v3.10.0.1
PROVISIONS - Asset Retirement Obligations (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
CAD ($)
Reconciliation of changes in other provisions [abstract]        
Balance, beginning of the year $ 316,100,000      
Balance, end of the year 350,400,000 $ 316,100,000    
Less current portion (9,000,000) (17,100,000)    
Non-current portion 341,400,000 299,000,000    
Outstanding borrowing amount 400,000 1,300,000    
Essakane S.A.        
Reconciliation of changes in other provisions [abstract]        
Collateral, restricted cash guaranteeing asset retirement obligations 23,900,000 19,500,000    
Rosebel Gold Mines N.V.        
Reconciliation of changes in other provisions [abstract]        
Collateral, restricted cash guaranteeing asset retirement obligations 0 5,000,000    
Doyon division including the Westwood mine        
Reconciliation of changes in other provisions [abstract]        
Uncollateralized surety bonds outstanding to guarantee asset retirement obligations related to the Doyon division 98,600,000 101,600,000 $ 134,600,000 $ 127,200,000
Côté Gold Project        
Reconciliation of changes in other provisions [abstract]        
Uncollateralized surety bonds outstanding to guarantee asset retirement obligations related to the Doyon division 35,100,000   47,900,000 0
Surety Bond        
Reconciliation of changes in other provisions [abstract]        
Uncollateralized surety bonds outstanding to guarantee asset retirement obligations related to the Doyon division 133,700,000 101,600,000 $ 182,500,000 $ 127,200,000
Asset retirement obligations        
Reconciliation of changes in other provisions [abstract]        
Balance, beginning of the year 292,800,000 285,100,000    
Revision of estimated cash flows and discount rates: Capitalized in property, plant and equipment 30,100,000 4,600,000    
Revision of estimated cash flows and discount rates: Changes in asset retirement obligations at closed sites 7,300,000 7,500,000    
Sale of 30% interest in the Côté Gold Project 0 (300,000)    
Accretion expense 1,200,000 900,000    
Disbursements (4,000,000) (5,000,000)    
Other Provisions, Other Changes 200,000 0    
Balance, end of the year 327,600,000 292,800,000    
Less current portion (7,800,000) (10,800,000)    
Non-current portion $ 319,800,000 $ 282,000,000    
v3.10.0.1
PROVISIONS - Future disbursements (Details) - Dec. 31, 2018
$ in Millions, $ in Millions
USD ($)
CAD ($)
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 182.9 $ 179.1
Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   179.1
Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) 182.9  
2019 | Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   10.7
2019 | Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) 0.0  
2020 | Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   18.1
2020 | Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) 0.0  
2021 | Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   14.7
2021 | Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) 0.3  
2022 | Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   9.8
2022 | Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) 0.0  
2023 | Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   8.4
2023 | Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) 1.9  
2024 and thereafter | Doyon Mine and Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD)   $ 117.4
2024 and thereafter | Essakane and Rosebel Mines    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 180.7  
v3.10.0.1
PROVISIONS - Estimated Undiscounted Amounts Of Cash Flows Required To Settle Obligations (Details) - 12 months ended Dec. 31, 2018
$ in Millions, $ in Millions
USD ($)
CAD ($)
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 182.9 $ 179.1
Rosebel Gold Mines N.V.    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 96.3 0.0
Average Real Discount Rates 0.80%  
Essakane S.A.    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 86.6 0.0
Average Real Discount Rates 0.70%  
Doyon    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 0.0 152.8
Average Real Discount Rates 0.30%  
Other Canadian Sites    
Disclosure of other provisions [line items]    
Undiscounted Amounts required (in CAD and USD) $ 0.0 $ 26.3
Average Real Discount Rates 0.20%  
v3.10.0.1
OTHER LIABILITIES (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract]    
Finance lease liabilities $ 9.3 $ 0.2
Derivatives 10.6 0.0
Other liabilities 0.0 2.9
Total other liabilities 19.9 3.1
Current portion of other liabilities 6.8 2.9
Non-current portion of other liabilities $ 13.1 $ 0.2
v3.10.0.1
INCOME TAXES - Narrative (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]    
Average effective tax rate 207.70% 16.00%
Applicable tax rate 26.60% 26.60%
v3.10.0.1
INCOME TAXES - Components of Income Tax Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Current income tax $ 45.1 $ 59.7
Changes in tax rates or imposition of new taxes 0.0 0.8
Deferred income tax (7.1) 37.9
Total income tax expense 38.0 97.6
Domestic Country    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Current income tax 3.3 3.0
Deferred income tax - origination and reversal of temporary differences (3.5) 4.6
Foreign Country    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Current income tax 41.8 56.7
Deferred income tax - origination and reversal of temporary differences $ (3.6) $ 32.5
v3.10.0.1
INCOME TAXES - Reconciliation Of Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]    
Earnings before income taxes $ 18.3 $ 608.1
Income tax provision - 26.6% (26.6% in 2017) 4.9 161.8
Increase (reduction) in income taxes resulting from:    
Earnings in foreign jurisdictions subject to a different tax rate than 26.6% (6.7) 1.4
Permanent items that are not included in income / losses for tax purposes:    
Non-deductible expenses 8.7 5.5
Losses not recognized for tax purposes (1.2) (1.1)
Tax provisions not based on legal entity income or losses for the year:    
Provincial mining duty tax (0.4) 6.0
Non-resident withholding tax 2.2 2.6
Under/(over) tax provisions 1.6 6.0
Changes in tax rates 0.0 0.8
Other 0.1 (3.2)
Other adjustments:    
Unrecognized recoveries (expenses) in deferred tax provisions 30.1 (84.0)
Foreign exchange related to deferred income taxes (1.0) 2.6
Other (0.3) (0.8)
Total income tax expense $ 38.0 $ 97.6
v3.10.0.1
INCOME TAXES - Deferred Income Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets and liabilities [abstract]      
Deferred tax assets $ 0.0 $ 0.0  
Deferred tax liabilities (188.2) (198.2)  
Net deferred income tax liabilities (188.2) (198.2) $ (159.0)
Deductible temporary differences for which no deferred tax asset is recognised 1,350.6 1,233.0  
Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 139.2 102.9  
Deferred tax liabilities (327.4) (301.1)  
Exploration and evaluation assets      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets   0.0 109.1
Deductible temporary differences for which no deferred tax asset is recognised 497.8 306.4  
Non-capital losses      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 105.2 71.9 0.0
Deductible temporary differences for which no deferred tax asset is recognised 550.4 619.0  
Non-capital losses | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 105.2 71.9  
Asset retirement obligations      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 2.8 2.5 3.7
Deductible temporary differences for which no deferred tax asset is recognised 163.1 157.5  
Asset retirement obligations | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 2.8 2.5  
Other      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 31.2 28.5 10.3
Deductible temporary differences for which no deferred tax asset is recognised 44.2 41.1  
Other | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax assets 31.2 28.5  
Deferred tax liabilities (2.6) (4.9)  
Property, plant and equipment      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (273.5) (253.9) (213.6)
Property, plant and equipment | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (273.5) (253.9)  
Royalty interests      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (7.2) (8.0) (7.7)
Royalty interests | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (7.2) (8.0)  
Other intangible assets      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities 0.0 (0.2) (0.5)
Other intangible assets | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities 0.0 (0.2)  
Mining duties | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (22.6) (26.1)  
Marketable securities      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities 0.0 (1.5) (0.9)
Marketable securities | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities 0.0 (1.5)  
Inventory and Reserves      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (21.5) (6.5) (10.1)
Inventory and Reserves | Before Offset Amount      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (21.5) (6.5)  
Net capital losses      
Deferred tax assets and liabilities [abstract]      
Deductible temporary differences for which no deferred tax asset is recognised 72.5 82.9  
Mining duties      
Deferred tax assets and liabilities [abstract]      
Deferred tax liabilities (22.6) (26.1) $ (19.7)
Deductible temporary differences for which no deferred tax asset is recognised $ 22.6 $ 26.1  
v3.10.0.1
INCOME TAXES - Changes to OCI (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]    
Unrealized change in fair value of marketable securities $ (1.8) $ 0.6
Hedges (1.2) 0.3
Total income taxes related to OCI $ (3.0) $ 0.9
v3.10.0.1
INCOME TAXES - Total Unrecognized Losses (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised $ 550.4  
Deferred income tax liability not recognized 719.3 $ 794.2
2019    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 1.6  
2020    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 0.7  
2021    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 1.1  
2022    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 1.9  
2023 and thereafter    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised 432.8  
No Expiry    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Unused tax losses for which no deferred tax asset recognised $ 112.3  
v3.10.0.1
INCOME TAXES - Deferred Tax Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax assets $ 0.0  
Deferred tax liabilities (198.2)  
Net deferred income tax liabilities (198.2) $ (159.0)
Deferred tax income (expense) recognised in profit or loss 7.1 (37.9)
Income tax relating to components of other comprehensive income 3.0 (0.9)
Deferred tax relating to items credited (charged) directly to equity (0.1) (0.4)
Deferred tax assets 0.0 0.0
Deferred tax liabilities (188.2) (198.2)
Net deferred income tax liabilities (188.2) (198.2)
Exploration and evaluation assets    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax assets 0.0 109.1
Deferred tax income (expense) recognised in profit or loss   (109.1)
Deferred tax assets   0.0
Non-capital losses    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax assets 71.9 0.0
Deferred tax income (expense) recognised in profit or loss 33.3 71.9
Deferred tax assets 105.2 71.9
Asset retirement obligations    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax assets 2.5 3.7
Deferred tax income (expense) recognised in profit or loss 0.3 (1.2)
Deferred tax assets 2.8 2.5
Other    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax assets 28.5 10.3
Deferred tax income (expense) recognised in profit or loss 1.5 18.2
Income tax relating to components of other comprehensive income 1.2  
Deferred tax assets 31.2 28.5
Property, plant and equipment    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (253.9) (213.6)
Deferred tax income (expense) recognised in profit or loss (19.6) (40.3)
Deferred tax liabilities (273.5) (253.9)
Royalty interests    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (8.0) (7.7)
Deferred tax income (expense) recognised in profit or loss 0.8 (0.3)
Deferred tax liabilities (7.2) (8.0)
Other intangible assets    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (0.2) (0.5)
Deferred tax income (expense) recognised in profit or loss 0.2 0.3
Deferred tax liabilities 0.0 (0.2)
Mining duties    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (26.1) (19.7)
Deferred tax income (expense) recognised in profit or loss 3.5 (6.4)
Deferred tax liabilities (22.6) (26.1)
Marketable securities    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (1.5) (0.9)
Deferred tax income (expense) recognised in profit or loss (0.3) 0.0
Income tax relating to components of other comprehensive income 1.8 (0.6)
Deferred tax liabilities 0.0 (1.5)
Inventory and Reserves    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (6.5) (10.1)
Deferred tax income (expense) recognised in profit or loss (15.0) 3.6
Deferred tax liabilities (21.5) (6.5)
Other    
Reconciliation of changes in deferred tax asset (liability) [abstract]    
Deferred tax liabilities (4.9) (29.6)
Deferred tax income (expense) recognised in profit or loss 2.4 25.4
Income tax relating to components of other comprehensive income 0.0 (0.3)
Deferred tax relating to items credited (charged) directly to equity (0.1) (0.4)
Deferred tax liabilities $ (2.6) $ (4.9)
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES - Senior Notes (Details) - USD ($)
12 Months Ended
Mar. 16, 2017
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about borrowings [line items]      
Borrowing costs capitalised   $ 28,100,000 $ 24,100,000
Assets   3,961,000,000 3,966,900,000
Carrying Amount      
Disclosure of detailed information about borrowings [line items]      
Assets   775,100,000 867,200,000
Carrying Amount | Embedded derivative      
Disclosure of detailed information about borrowings [line items]      
Assets   700,000 6,800,000
7.0% Senior Notes      
Disclosure of detailed information about borrowings [line items]      
Face amount $ 400,000,000    
Borrowing costs capitalised $ 6,400,000    
Percentage of principal amount redeemed utilizing equity offering proceeds 40.00%    
Redemption price percentage utilizing equity offering proceeds 107.00%    
Long-term debt $ 400,000,000 $ 400,000,000 $ 400,000,000
Period to reinvest asset sale proceeds 365 days    
Threshold amount required to utilize proceeds to repurchase borrowings $ 50,000,000    
7.0% Senior Notes | 2020      
Disclosure of detailed information about borrowings [line items]      
Redemption price percentage 105.25%    
7.0% Senior Notes | 2021      
Disclosure of detailed information about borrowings [line items]      
Redemption price percentage 103.50%    
7.0% Senior Notes | 2022      
Disclosure of detailed information about borrowings [line items]      
Redemption price percentage 101.75%    
7.0% Senior Notes | 2023 and thereafter      
Disclosure of detailed information about borrowings [line items]      
Redemption price percentage 100.00%    
7.0% Senior Notes | Prior to April 15, 2020      
Disclosure of detailed information about borrowings [line items]      
Redemption price percentage 100.00%    
7.0% Senior Notes | Fixed interest rate      
Disclosure of detailed information about borrowings [line items]      
Interest rate 7.00% 7.00%  
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES - Schedule of Contractual Maturities (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 16, 2017
Dec. 31, 2018
Dec. 31, 2017
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Borrowing costs capitalised   $ 28.1 $ 24.1
Unamortized Deferred Transactions Costs      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Borrowing costs capitalised   5.0 5.8
7.0% Senior Notes      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Carrying amount $ 400.0 400.0 400.0
Contractual cash flows   582.0  
Borrowing costs capitalised 6.4    
7.0% Senior Notes | Less than One Year      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows   28.0  
7.0% Senior Notes | 1-2 yrs      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows   56.0  
7.0% Senior Notes | 3-5 yrs      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows   56.0  
7.0% Senior Notes | Greater than 5 Years      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows   $ 442.0  
Senior Notes at 6.75%      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Carrying amount $ 485.4   400.0
Contractual cash flows     610.0
Senior Notes at 6.75% | Less than One Year      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows     28.0
Senior Notes at 6.75% | 1-2 yrs      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows     56.0
Senior Notes at 6.75% | 3-5 yrs      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows     56.0
Senior Notes at 6.75% | Greater than 5 Years      
Disclosure of maturity analysis for non-derivative financial liabilities [line items]      
Contractual cash flows     $ 470.0
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES - 6.75% Senior Notes (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 16, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Sep. 21, 2012
Disclosure of detailed information about borrowings [line items]          
Repayments of borrowings     $ 0 $ 505,600,000  
Gain (loss) on purchase and redemption of Senior notes     $ 0 (20,200,000)  
Senior Notes at 6.75%          
Disclosure of detailed information about borrowings [line items]          
Face amount         $ 650,000,000
Repayments of borrowings $ 505,600,000 $ 505,600,000      
Carrying amount $ 485,400,000     $ 400,000,000  
Gain (loss) on purchase and redemption of Senior notes   $ (20,200,000)      
Senior Notes at 6.75% | Fixed interest rate          
Disclosure of detailed information about borrowings [line items]          
Interest rate 6.75%       6.75%
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES - Credit Facilities (Details)
Dec. 31, 2018
USD ($)
Nov. 15, 2018
USD ($)
oz
Dec. 31, 2017
USD ($)
Dec. 14, 2017
USD ($)
Disclosure of detailed information about borrowings [line items]        
Credit facility, accordion feature, increase limit   $ 100,000,000    
Leasing borrowing capacity provided   250,000,000    
Outstanding borrowing amount $ 400,000   $ 1,300,000  
February 2016 Four Year Credit Facility        
Disclosure of detailed information about borrowings [line items]        
Maximum borrowing capacity   $ 500,000,000   $ 250,000,000
Uncommitted capacity       $ 100,000,000
Gold prepay arrangement (in ounces) | oz   225,000    
February 2016 Four Year Credit Facility, Letters of Credit        
Disclosure of detailed information about borrowings [line items]        
Outstanding borrowing amount $ 400,000   $ 1,300,000  
v3.10.0.1
LONG-TERM DEBT AND CREDIT FACILITIES - Uncollateralized Surety Bonds (Details)
$ in Millions, $ in Millions
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CAD ($)
Surety Bond        
Disclosure of detailed information about borrowings [line items]        
Uncollateralized surety bonds outstanding to guarantee asset retirement obligations related to the Doyon division $ 133.7 $ 182.5 $ 101.6 $ 127.2
v3.10.0.1
FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Mar. 16, 2017
Disclosure of detailed information about financial instruments [line items]      
Cash and cash equivalents $ 734.1 $ 791.3  
Accounts payable and accrued liabilities 196.0 196.2  
Other liabilities 6.8 2.9  
7.0% Senior Notes      
Disclosure of detailed information about financial instruments [line items]      
Carrying amount 400.0 400.0 $ 400.0
Senior Notes at 6.75%      
Disclosure of detailed information about financial instruments [line items]      
Carrying amount   400.0 $ 485.4
Gross carrying amount | 7.0% Senior Notes      
Disclosure of detailed information about financial instruments [line items]      
Carrying amount $ 398.5 $ 391.6  
v3.10.0.1
FINANCIAL INSTRUMENTS - Marketable Securities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Financial Instruments [Abstract]    
Proceeds from sale of marketable securities $ 0.9 $ 14.5
Acquisition date fair value of marketable securities sold (1.3) (25.4)
Loss on sale of marketable securities recorded in OCI $ (0.4) $ (10.9)
v3.10.0.1
FINANCIAL INSTRUMENTS - Cash Flow Hedge Fair Value Reserve (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Gain (loss) recognized in cash flow hedge reserve    
Gain (loss) recognized in cash flow hedge reserve, hedging items $ (1.1) $ 16.5
Gain (loss) recognized in cash flow hedge reserve, time value of options contracts excluded from hedge relationship (15.8) (1.9)
Total gain (loss) recognized in cash flow hedge reserve (16.9) 14.6
(Gain) loss reclassified or adjusted from cash flow hedge reserve    
(Gain) loss reclassified or adjusted from cash flow hedge reserve (12.0) (5.1)
(Gain) loss reclassified or adjusted from cash flow hedge reserve, time value of option contracts excluded from hedge relationship 0.0 0.0
Total gain (loss) reclassified or adjusted from cash flow hedge reserve (12.0) (5.1)
Exchange rate risk | Canadian dollar forward contracts    
Gain (loss) recognized in cash flow hedge reserve    
Gain (loss) recognized in cash flow hedge reserve, hedging items (0.6) 0.0
(Gain) loss reclassified or adjusted from cash flow hedge reserve    
(Gain) loss reclassified or adjusted from cash flow hedge reserve 0.0 0.0
Exchange rate risk | Canadian dollar option contracts    
Gain (loss) recognized in cash flow hedge reserve    
Gain (loss) recognized in cash flow hedge reserve, hedging items (3.6) 6.8
(Gain) loss reclassified or adjusted from cash flow hedge reserve    
(Gain) loss reclassified or adjusted from cash flow hedge reserve (1.4) (2.5)
Exchange rate risk | Euro option contracts    
Gain (loss) recognized in cash flow hedge reserve    
Gain (loss) recognized in cash flow hedge reserve, hedging items (1.2) 6.5
(Gain) loss reclassified or adjusted from cash flow hedge reserve    
(Gain) loss reclassified or adjusted from cash flow hedge reserve (2.6) (2.3)
Crude oil option contracts    
Gain (loss) recognized in cash flow hedge reserve    
Gain (loss) recognized in cash flow hedge reserve, hedging items 4.3 3.2
(Gain) loss reclassified or adjusted from cash flow hedge reserve    
(Gain) loss reclassified or adjusted from cash flow hedge reserve $ (8.0) $ (0.3)
v3.10.0.1
FINANCIAL INSTRUMENTS - Cash Flow Reclassification of Gain (Loss) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about hedging instruments [line items]    
Amounts removed from equity and included in carrying amount of non-financial asset (liability) whose acquisition or incurrence was hedged highly probable forecast transaction, before tax $ (1.1) $ (1.1)
Net change in fair value of cash flow hedges reclassified to the statements of earnings (10.9) (4.0)
(Gain) loss reclassified or adjusted from cash flow hedge reserve (12.0) (5.1)
Cost of sales    
Disclosure of detailed information about hedging instruments [line items]    
Net change in fair value of cash flow hedges reclassified to the statements of earnings (10.5) (3.3)
General and administrative expenses    
Disclosure of detailed information about hedging instruments [line items]    
Net change in fair value of cash flow hedges reclassified to the statements of earnings $ (0.4) $ (0.7)
v3.10.0.1
FINANCIAL INSTRUMENTS - Currency Exchange Rate Derivative Contracts (Details) - Dec. 31, 2018 - Exchange rate risk
€ in Millions, $ in Millions
CAD ($)
$ / shares
€ / $
EUR (€)
$ / shares
€ / $
Canadian dollar option contracts    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Outstanding derivative contracts | $ $ 468  
Canadian dollar option contracts | 2019    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Outstanding derivative contracts | $ $ 282  
Canadian dollar option contracts | 2019 | Bottom of range    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.25 1.25
Canadian dollar option contracts | 2019 | Top of range    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.39 1.39
Canadian dollar option contracts | 2020    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Outstanding derivative contracts | $ $ 186  
Canadian dollar option contracts | 2020 | Bottom of range    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.30 1.30
Canadian dollar option contracts | 2020 | Top of range    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.36 1.36
Canadian dollar option contracts, call option one | 2019    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.25 1.25
Canadian dollar option contracts, call option two | 2020    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.30 1.30
Canadian dollar option contracts, put option one | 2019    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.39 1.39
Canadian dollar option contracts, put option two | 2020    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) 1.36 1.36
Euro option contracts    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Outstanding derivative contracts | €   € 96
Euro option contracts | 2019    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Outstanding derivative contracts | €   € 96
Euro option contracts | 2019 | Bottom of range    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) | € / $ 1.13 1.13
Euro option contracts | 2019 | Top of range    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) | € / $ 1.20 1.20
Euro option contracts | 2020    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Outstanding derivative contracts | €   € 0
Euro option contracts, put option | 2019    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) | € / $ 1.13 1.13
Euro option contracts, call option | 2019    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Contract rate range (in USD per CAD and EUR per USD) | € / $ 1.20 1.20
v3.10.0.1
FINANCIAL INSTRUMENTS - Currency Exchange Risk (Details) - Exchange rate risk - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Canadian dollar option contracts    
Disclosure of detailed information about hedging instruments [line items]    
Risk exposure associated with instruments sharing characteristic $ (5.1)  
Increase of 10%, Sensitivity analysis (31.7)  
Decrease of 10%, Sensitivity analysis 24.5  
Euro option contracts    
Disclosure of detailed information about hedging instruments [line items]    
Risk exposure associated with instruments sharing characteristic (0.2)  
Increase of 10%, Sensitivity analysis 9.0  
Decrease of 10%, Sensitivity analysis (7.8)  
Cash flow hedges    
Disclosure of detailed information about hedging instruments [line items]    
Carrying amount, Assets 0.0 $ 9.7
Carrying amount, Liabilities (5.3) 0.0
Accumulated cash flow hedge fair value reserve (before tax) (1.1) 8.3
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments (1.1) 8.3
Fair value changes used for calculating hedge ineffectiveness, Hedged items 1.1 (8.3)
Cash flow hedges | Canadian dollar option contracts    
Disclosure of detailed information about hedging instruments [line items]    
Carrying amount, Assets 0.0 5.3
Carrying amount, Liabilities (4.5) 0.0
Accumulated cash flow hedge fair value reserve (before tax) (0.5) 4.5
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments (0.5) 4.5
Fair value changes used for calculating hedge ineffectiveness, Hedged items 0.5 (4.5)
Cash flow hedges | Canadian dollar forward contracts    
Disclosure of detailed information about hedging instruments [line items]    
Carrying amount, Assets 0.0  
Carrying amount, Liabilities (0.6)  
Accumulated cash flow hedge fair value reserve (before tax) (0.6)  
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments (0.6)  
Fair value changes used for calculating hedge ineffectiveness, Hedged items 0.6  
Cash flow hedges | Euro option contracts    
Disclosure of detailed information about hedging instruments [line items]    
Carrying amount, Assets 0.0 4.4
Carrying amount, Liabilities (0.2) 0.0
Accumulated cash flow hedge fair value reserve (before tax) 0.0 3.8
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments 0.0 3.8
Fair value changes used for calculating hedge ineffectiveness, Hedged items $ 0.0 $ (3.8)
v3.10.0.1
FINANCIAL INSTRUMENTS - Crude Oil Derivative Contracts (Details) - Oil and Fuel Market Price Risk
bbl in Thousands
Dec. 31, 2018
bbl
$ / bbl
Brent crude oil option contracts  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 2,235
Brent crude oil option contracts | 2019  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 654
Brent crude oil option contracts | 2019 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 44
Brent crude oil option contracts | 2019 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 65
Brent crude oil option contracts | 2020  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 573
Brent crude oil option contracts | 2020 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 50
Brent crude oil option contracts | 2020 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 65
Brent crude oil option contracts | 2021  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 588
Brent crude oil option contracts | 2021 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 54
Brent crude oil option contracts | 2021 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 65
Brent crude oil option contracts | 2022  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 420
Brent crude oil option contracts | 2022 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 53
Brent crude oil option contracts | 2022 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 65
Brent crude oil option contracts | 2023  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 0
WTI crude oil option contracts  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 2,139
WTI crude oil option contracts | 2019  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 498
WTI crude oil option contracts | 2019 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 40
WTI crude oil option contracts | 2019 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 60
WTI crude oil option contracts | 2020  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 489
WTI crude oil option contracts | 2020 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 43
WTI crude oil option contracts | 2020 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 60
WTI crude oil option contracts | 2021  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 456
WTI crude oil option contracts | 2021 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 46
WTI crude oil option contracts | 2021 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 62
WTI crude oil option contracts | 2022  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 348
WTI crude oil option contracts | 2022 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 45
WTI crude oil option contracts | 2022 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 62
WTI crude oil option contracts | 2023  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Outstanding derivative contracts (in barrels) | bbl 348
WTI crude oil option contracts | 2023 | Bottom of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 47
WTI crude oil option contracts | 2023 | Top of range  
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]  
Option contracts with strike prices at (USD/barrel) 60
v3.10.0.1
FINANCIAL INSTRUMENTS - Oil and Fuel Market Price Risk (Details) - Oil and Fuel Market Price Risk - Cash flow hedges - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about hedging instruments [line items]    
Carrying amount, Assets $ 0.1 $ 8.8
Carrying amount, Liabilities (5.3) 0.0
Accumulated cash flow hedge fair value reserve (before tax) (1.0) 2.8
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments (1.0) 2.8
Fair value changes used for calculating hedge ineffectiveness, Hedged items 1.0 (2.8)
Brent crude oil option contracts    
Disclosure of detailed information about hedging instruments [line items]    
Risk exposure associated with instruments sharing characteristic (2.5)  
Increase of 10%, Sensitivity analysis 4.3  
Decrease of 10%, Sensitivity analysis (9.6)  
Carrying amount, Assets 0.1 6.1
Carrying amount, Liabilities (2.6)  
Accumulated cash flow hedge fair value reserve (before tax) (1.0) 2.7
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments (1.0) 2.7
Fair value changes used for calculating hedge ineffectiveness, Hedged items 1.0 (2.7)
WTI crude oil option contracts    
Disclosure of detailed information about hedging instruments [line items]    
Risk exposure associated with instruments sharing characteristic (2.7)  
Increase of 10%, Sensitivity analysis 7.2  
Decrease of 10%, Sensitivity analysis (12.1)  
Carrying amount, Assets 0.0 2.7
Carrying amount, Liabilities (2.7) 0.0
Accumulated cash flow hedge fair value reserve (before tax) 0.0 0.1
Fair value changes used for calculating hedge ineffectiveness, Hedging instruments 0.0 0.1
Fair value changes used for calculating hedge ineffectiveness, Hedged items $ 0.0 $ (0.1)
v3.10.0.1
FINANCIAL INSTRUMENTS - Gain (Loss) on Non-Hedge Derivatives and Warrants (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Warrants $ (3.0) $ 0.5
Gain (loss) on non-hedge derivatives and warrants (9.1) 3.1
Embedded derivative    
Disclosure of maturity analysis for derivative financial liabilities [line items]    
Change in fair value of embedded derivative $ (6.1) $ 2.6
v3.10.0.1
FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 16, 2017
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   $ 3,961.0 $ 3,966.9
Liabilities   (1,168.4) (1,120.1)
Borrowing costs capitalised   28.1 24.1
Unamortized Deferred Transactions Costs      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Borrowing costs capitalised   $ 5.0 5.8
7.0% Senior Notes      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Borrowing costs capitalised $ 6.4    
Fixed interest rate | 7.0% Senior Notes      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Interest rate 7.00% 7.00%  
Carrying Amount      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   $ 775.1 867.2
Liabilities   (410.6)  
Carrying Amount | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (5.3)  
Carrying Amount | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (5.3)  
Carrying Amount | Long-term debt      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (400.0) (400.0)
Carrying Amount | Cash and cash equivalents      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   615.1 664.1
Carrying Amount | Short-term investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   119.0 127.2
Carrying Amount | Restricted cash      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   23.9 24.5
Carrying Amount | Marketable securities and warrants      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   15.3 24.2
Carrying Amount | Bond fund investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   1.0 1.9
Carrying Amount | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets     9.7
Carrying Amount | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.1 8.8
Carrying Amount | Embedded derivative      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.7 6.8
Recurring fair value measurement      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   775.1 867.2
Liabilities   (391.8)  
Recurring fair value measurement | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (5.3)  
Recurring fair value measurement | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (5.3)  
Recurring fair value measurement | Long-term debt      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (381.2) (413.9)
Recurring fair value measurement | Cash and cash equivalents      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   615.1 664.1
Recurring fair value measurement | Short-term investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   119.0 127.2
Recurring fair value measurement | Restricted cash      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   23.9 24.5
Recurring fair value measurement | Marketable securities and warrants      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   15.3 24.2
Recurring fair value measurement | Bond fund investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   1.0 1.9
Recurring fair value measurement | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets     9.7
Recurring fair value measurement | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.1 8.8
Recurring fair value measurement | Embedded derivative      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.7 6.8
Recurring fair value measurement | Level 1      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   765.9 836.5
Liabilities   (381.2)  
Recurring fair value measurement | Level 1 | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   0.0  
Recurring fair value measurement | Level 1 | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   0.0  
Recurring fair value measurement | Level 1 | Long-term debt      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (381.2) (413.9)
Recurring fair value measurement | Level 1 | Cash and cash equivalents      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   615.1 664.1
Recurring fair value measurement | Level 1 | Short-term investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   119.0 127.2
Recurring fair value measurement | Level 1 | Restricted cash      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   23.9 24.5
Recurring fair value measurement | Level 1 | Marketable securities and warrants      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   6.9 18.8
Recurring fair value measurement | Level 1 | Bond fund investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   1.0 1.9
Recurring fair value measurement | Level 1 | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets     0.0
Recurring fair value measurement | Level 1 | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 1 | Embedded derivative      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 2      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   3.2 30.7
Liabilities   (10.6)  
Recurring fair value measurement | Level 2 | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (5.3)  
Recurring fair value measurement | Level 2 | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   (5.3)  
Recurring fair value measurement | Level 2 | Long-term debt      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   0.0 0.0
Recurring fair value measurement | Level 2 | Cash and cash equivalents      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 2 | Short-term investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 2 | Restricted cash      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 2 | Marketable securities and warrants      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   2.4 5.4
Recurring fair value measurement | Level 2 | Bond fund investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 2 | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets     9.7
Recurring fair value measurement | Level 2 | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.1 8.8
Recurring fair value measurement | Level 2 | Embedded derivative      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.7 6.8
Recurring fair value measurement | Level 3      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   6.0 0.0
Liabilities   0.0  
Recurring fair value measurement | Level 3 | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   0.0  
Recurring fair value measurement | Level 3 | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   0.0  
Recurring fair value measurement | Level 3 | Long-term debt      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Liabilities   0.0 0.0
Recurring fair value measurement | Level 3 | Cash and cash equivalents      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 3 | Short-term investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 3 | Restricted cash      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 3 | Marketable securities and warrants      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   6.0 0.0
Recurring fair value measurement | Level 3 | Bond fund investments      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 3 | Currency contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets     0.0
Recurring fair value measurement | Level 3 | Crude oil contracts      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   0.0 0.0
Recurring fair value measurement | Level 3 | Embedded derivative      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Assets   $ 0.0 $ 0.0
v3.10.0.1
FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Marketable securities included in level 3      
Balance, December 31, 2017 $ 3,966.9    
Shares received (4.8)    
Balance, December 31, 2018 3,961.0    
Assets 3,966.9 $ 3,961.0 $ 3,966.9
Liabilities   1,168.4 1,120.1
Recurring fair value measurement      
Marketable securities included in level 3      
Balance, December 31, 2017 867.2    
Balance, December 31, 2018 775.1    
Assets 867.2 775.1 867.2
Liabilities   391.8  
Recurring fair value measurement | Long-term debt      
Marketable securities included in level 3      
Liabilities   381.2 413.9
Marketable securities and warrants | Recurring fair value measurement      
Marketable securities included in level 3      
Balance, December 31, 2017 24.2    
Balance, December 31, 2018 15.3    
Assets 24.2 15.3 24.2
Embedded derivative | Recurring fair value measurement      
Marketable securities included in level 3      
Balance, December 31, 2017 6.8    
Balance, December 31, 2018 0.7    
Assets 6.8 0.7 6.8
Level 3 | Recurring fair value measurement      
Marketable securities included in level 3      
Balance, December 31, 2017 0.0    
Balance, December 31, 2018 6.0    
Assets 0.0 6.0 0.0
Liabilities   0.0  
Level 3 | Recurring fair value measurement | Long-term debt      
Marketable securities included in level 3      
Liabilities   0.0 0.0
Level 3 | Marketable securities and warrants | Recurring fair value measurement      
Marketable securities included in level 3      
Balance, December 31, 2017 0.0    
Shares received 6.0    
Change in fair value reported in Other comprehensive income, net of income taxes 0.0    
Balance, December 31, 2018 6.0    
Assets 0.0 6.0 0.0
Level 3 | Embedded derivative | Recurring fair value measurement      
Marketable securities included in level 3      
Balance, December 31, 2017 0.0    
Balance, December 31, 2018 0.0    
Assets $ 0.0 $ 0.0 $ 0.0
v3.10.0.1
CAPITAL MANAGEMENT (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Mar. 16, 2017
Dec. 31, 2016
Disclosure of detailed information about borrowings [line items]        
Cash and cash equivalents $ 615.1 $ 664.1   $ 652.0
Short-term investments 119.0 127.2    
Cash and cash equivalents including short-term investments 734.1 791.3    
Credit facility available for use 499.6 248.7    
Common shares 2,680.1 2,677.8    
Capital Management Liabilities And Equity 3,579.7 3,326.5    
Unamortized Deferred Transactions Costs        
Disclosure of detailed information about borrowings [line items]        
Unamortized deferred transaction costs 5.0 5.8    
7.0% Senior Notes        
Disclosure of detailed information about borrowings [line items]        
Long-term debt $ 400.0 $ 400.0 $ 400.0  
v3.10.0.1
SHARE CAPITAL - ROLLFORWARD OF COMMON SHARES (Details) - Common shares - shares
shares in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of number of shares outstanding [abstract]    
Outstanding, beginning of the year 465.9 453.8
Equity issuance 0.0 7.9
Issuance of flow-through common shares 0.0 3.4
Issuance of shares for share-based compensation 0.9 0.8
Outstanding, end of the year 466.8 465.9
v3.10.0.1
SHARE CAPITAL (Details)
$ / shares in Units, $ / shares in Units, shares in Thousands, $ in Millions
1 Months Ended 12 Months Ended
Nov. 29, 2018
USD ($)
$ / shares
shares
Nov. 27, 2017
shares
Dec. 12, 2016
USD ($)
tranche
shares
Mar. 31, 2017
USD ($)
shares
Mar. 31, 2017
CAD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Disclosure of classes of share capital [line items]              
Payment of rights to the Saramacca property           $ (1,200,000) $ (100,000)
Other liabilities           13,100,000 200,000
Common shares           2,680,100,000 2,677,800,000
Amortization of gains related to flow-through common shares           0 3,600,000
Payments for exploration and evaluation expenses           42,500,000 13,400,000
Contingently Issuable Shares to the Government of Suriname              
Disclosure of classes of share capital [line items]              
Shares issued during period, price per share (in CAD and dollars per share) | $ / shares $ 3.11            
Payment of rights to the Saramacca property $ 3,200,000            
Number of shares authorised | shares 1,042 3,125          
Number of shares issued | shares   1,042          
Value of shares issued during the period             5,900,000
Shares issued, closing price measurement period 20 days            
Exploration and evaluation assets              
Disclosure of classes of share capital [line items]              
Payments for exploration and evaluation expenses     $ 10,000,000        
Contingently issuable consideration for purchase of exploration and evaluation rights (in shares) | shares     3,125        
Number of tranches for delivery of contingently issuable consideration | tranche     3        
Contingently issuable consideration, tranche intervals     12 months        
Measurement period for upward adjustment of purchase price     24 months        
Maximum upward adjustment to purchase price     $ 10,000,000        
Agreement termination notification period     60 days        
Flow-through shares issued to fund expenditures on Westwood Mine, March 2017              
Disclosure of classes of share capital [line items]              
Common shares       $ 13,400,000      
Unspent portion           $ 0 $ 0
Common shares              
Disclosure of classes of share capital [line items]              
Issuance of flow-through common shares (in shares) | shares           0 3,400
Common shares | Flow-through shares issued to fund expenditures on Westwood Mine, March 2017              
Disclosure of classes of share capital [line items]              
Issuance of flow-through common shares (in shares) | shares       3,400 3,400    
Shares issued during period, price per share (in CAD and dollars per share) | $ / shares         $ 5.91    
Payment of rights to the Saramacca property       $ 15,100,000 $ 20.0    
Other liabilities       $ 1,700,000      
v3.10.0.1
NON-CONTROLLING INTERESTS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of consolidated [line items]    
Accumulated non-controlling interest $ 60.0 $ 55.2
Net earnings attributable to non-controlling interests 8.5 8.9
Current assets 1,086.9 1,161.0
Total non- current assets 2,874.1 2,805.9
Current liabilities (227.2) (231.1)
Non-current liabilities (941.2) (889.0)
Revenues 1,111.0 1,094.9
Net earnings and other comprehensive income (56.9) 528.0
Net cash from operating activities 191.1 295.3
Net cash used in investing activities (224.9) (177.4)
Net cash used in financing activities (10.5) (117.2)
Increase (decrease) in cash and cash equivalents $ (49.0) $ 12.1
Essakane S.A.    
Disclosure of consolidated [line items]    
Percentage of voting rights held by non-controlling interests 10.00% 10.00%
Accumulated non-controlling interest $ 30.3 $ 25.5
Net earnings attributable to non-controlling interests 5.8 0.6
Dividends paid to material non-controlling interests 1.0 1.0
Current assets 245.1 220.5
Total non- current assets 865.8 848.4
Current liabilities (96.7) (88.1)
Non-current liabilities (543.5) (552.6)
Share of net assets (liabilities) of joint ventures 470.7 428.2
Revenues 564.1 547.4
Net earnings and other comprehensive income 52.1 8.2
Net cash from operating activities 181.8 215.5
Net cash used in investing activities (161.4) (85.7)
Net cash used in financing activities (45.2) (127.7)
Increase (decrease) in cash and cash equivalents $ (24.8) $ 2.1
Rosebel Gold Mines N.V.    
Disclosure of consolidated [line items]    
Percentage of voting rights held by non-controlling interests 5.00% 5.00%
Accumulated non-controlling interest $ 25.3 $ 25.9
Net earnings attributable to non-controlling interests 0.9 5.7
Dividends paid to material non-controlling interests 1.5 1.0
Current assets 172.8 181.0
Total non- current assets 675.1 645.4
Current liabilities (68.4) (72.4)
Non-current liabilities (221.7) (183.6)
Share of net assets (liabilities) of joint ventures 557.8 570.4
Revenues 386.0 385.6
Net earnings and other comprehensive income 17.3 113.1
Net cash from operating activities 61.6 124.5
Net cash used in investing activities (67.9) (63.1)
Net cash used in financing activities (36.1) (25.5)
Increase (decrease) in cash and cash equivalents (42.4) 35.9
Subsidiaries with material non-controlling interests    
Disclosure of consolidated [line items]    
Dividends paid to material non-controlling interests $ 1.2 $ 1.1
v3.10.0.1
EARNINGS PER SHARE - Earnings (loss) per share computations (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Numerator    
Net earnings (loss) attributable to equity holders of IAMGOLD $ (28.2) $ 501.6
Denominator    
Weighted average number of common shares (basic) 466.5 463.0
Basic earnings attributable to equity holders of IAMGOLD (in dollars per share) $ (0.06) $ 1.08
Dilutive effect of share options 0.0 1.2
Dilutive effect of full value award units 0.0 3.3
Weighted average number of common shares (diluted) 466.5 467.5
Diluted earnings attributable to equity holders of IAMGOLD (in dollars per share) $ (0.06) $ 1.07
v3.10.0.1
EARNINGS PER SHARE - Antidilutive Securities (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Earnings per share [line items]    
Antidilutive securities 13.3 4.5
Share options    
Earnings per share [line items]    
Antidilutive securities 7.1 2.4
Full value awards    
Earnings per share [line items]    
Antidilutive securities 5.2 0.0
Contingently issuable shares    
Earnings per share [line items]    
Antidilutive securities 1.0 2.1
v3.10.0.1
SHARE-BASED COMPENSATION - Share-based Compensation Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Value of share-based payment arrangements $ 8.4 $ 5.9
Share Options    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Value of share-based payment arrangements 2.3 2.0
Restricted, Performance and Deferred Share Units    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Value of share-based payment arrangements $ 6.1 $ 3.9
v3.10.0.1
SHARE-BASED COMPENSATION - Narrative (Details)
12 Months Ended
Dec. 31, 2018
shares
Dec. 31, 2017
shares
Dec. 31, 2016
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Number of share options outstanding in share-based payment arrangement (in shares) 7,086,441 6,700,000 6,000,000
Number of other equity instruments outstanding in share-based payment arrangement (in shares) 5,198,066 4,600,000 3,700,000
Share Options      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expiration period 7 years    
Maximum allotment of common shares reserved in share-based payment arrangement (in shares) 25,505,624    
Common shares in reserve in share-based payment arrangement (in shares) 11,374,026    
Common shares unallocated in reserve in share-based payment arrangement (in shares) 4,287,585    
Restricted, Performance and Deferred Share Units      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Maximum allotment of common shares reserved in share-based payment arrangement (in shares) 13,756,762    
Common shares in reserve in share-based payment arrangement (in shares) 10,355,715    
Common shares unallocated in reserve in share-based payment arrangement (in shares) 5,157,649    
Employee Share Purchase Plan      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Required employee service period 3 months    
Company's matching percentage 75.00%    
Percentage of employee contribution that company will match 5.00%    
Maximum percentage company will match 3.75%    
Bottom of range | Share Options      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Vesting period 4 years    
Bottom of range | Restricted Share Units      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Vesting period 12 months    
Bottom of range | Employee Share Purchase Plan      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Employee contribution, percentage of base salary 1.00%    
Top of range | Share Options      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Vesting period 5 years    
Top of range | Restricted Share Units      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Vesting period 36 months    
Top of range | Employee Share Purchase Plan      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Employee contribution, percentage of base salary 10.00%    
v3.10.0.1
SHARE-BASED COMPENSATION - Share Option Award Plan (Details)
12 Months Ended
Dec. 31, 2018
CAD ($)
$ / shares
shares
Dec. 31, 2017
CAD ($)
shares
Share-Based Payment Arrangements [Abstract]    
Outstanding, beginning of the period (in shares) | shares 6,700,000 6,000,000
Granted (in shares) | shares 1,000,000 1,600,000
Exercised (in shares) | shares (100,000) (200,000)
Forfeited and expired (in shares) | shares (500,000) (700,000)
Outstanding, end of the period (in shares) | shares 7,086,441 6,700,000
Exercisable, end of the period (in shares) | shares 3,700,000 3,300,000
Outstanding, beginning of the period (C$ per share) | $ $ 6.81 $ 7.79
Granted (C$ per share) | $ 6.83 5.24
Exercised (C$ per share) | $ 4.48 4.23
Forfeited and expired (C$ per share) | $ 17.08 12.87
Outstanding, end of the period (C$ per share) | $ 6.15 6.81
Exercisable, end of the period (C$ per share) | $ $ 7.16 $ 9.10
Closing foreign exchange rate | $ / shares 0.7329  
v3.10.0.1
SHARE-BASED COMPENSATION - Information Related to Share Options Outstanding (Details)
Dec. 31, 2018
CAD ($)
shares
year
Dec. 31, 2017
CAD ($)
shares
Dec. 31, 2016
CAD ($)
shares
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding in share-based payment arrangement (in shares) | shares 7,086,441 6,700,000 6,000,000
Weighted Average Remaining Contractual Life (years) | year 3.4    
Weighted Average Exercise Price (C$/share) $ 6.15 $ 6.81 $ 7.79
1.01 - 5.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding in share-based payment arrangement (in shares) | shares 2,700,000    
Weighted Average Remaining Contractual Life (years) | year 3.2    
Weighted Average Exercise Price (C$/share) $ 3.56    
5.01 - 10.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding in share-based payment arrangement (in shares) | shares 3,600,000    
Weighted Average Remaining Contractual Life (years) | year 4.2    
Weighted Average Exercise Price (C$/share) $ 6.41    
10.01 - 15.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding in share-based payment arrangement (in shares) | shares 800,000    
Weighted Average Remaining Contractual Life (years) | year 0.3    
Weighted Average Exercise Price (C$/share) $ 13.17    
Bottom of range | 1.01 - 5.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (C$/share) 1.01    
Bottom of range | 5.01 - 10.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (C$/share) 5.01    
Bottom of range | 10.01 - 15.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (C$/share) 10.01    
Top of range | 1.01 - 5.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (C$/share) 5.00    
Top of range | 5.01 - 10.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (C$/share) 10.00    
Top of range | 10.01 - 15.00      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (C$/share) $ 15.00    
v3.10.0.1
SHARE-BASED COMPENSATION - Stock Options Fair Value Inputs (Details)
12 Months Ended
Dec. 31, 2018
CAD ($)
year
Dec. 31, 2017
CAD ($)
year
Share options    
Weighted average risk-free interest rate 2.00% 1.10%
Weighted average expected volatility 65.00% 66.00%
Weighted average dividend yield 0.00% 0.00%
Weighted average expected life of options issued (years) | year 5.0 5.0
Weighted average grant-date fair value (C$ per share) $ 3.77 $ 2.89
Weighted average share price at grant date (C$ per share) 6.83 5.24
Weighted average exercise price (C$ per share) $ 6.83 $ 5.24
Deferred share units    
Weighted average risk-free interest rate 1.70% 0.70%
Weighted average expected volatility 44.00% 76.00%
Weighted average dividend yield 0.00% 0.00%
Weighted average expected life of options issued (years) | year 1.0 1.0
Weighted average grant-date fair value (C$ per share) $ 7.26 $ 5.19
Weighted average share price at grant date (C$ per share) $ 7.26 $ 5.19
v3.10.0.1
SHARE-BASED COMPENSATION - Full Value Award Plans (Details) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-Based Payment Arrangements [Abstract]    
Outstanding, beginning of the period (in shares) 4,600,000 3,700,000
Granted (in shares) 2,000,000 2,200,000
Issued (in shares) (800,000) (600,000)
Forfeited (in shares) (600,000) (700,000)
Outstanding, end of the period (in shares) 5,198,066 4,600,000
v3.10.0.1
SHARE-BASED COMPENSATION - Restricted Stock Units Fair Value Inputs (Details)
12 Months Ended
Dec. 31, 2018
CAD ($)
year
Dec. 31, 2017
CAD ($)
year
Share-Based Payment Arrangements [Abstract]    
Weighted average risk-free interest rate 1.90% 0.80%
Weighted average expected volatility 64.00% 72.00%
Weighted average dividend yield 0.00% 0.00%
Weighted average expected life of RSUs issued (years) | year 3.0 2.9
Weighted average grant-date fair value (C$ per share) $ 6.76 $ 5.24
Weighted average share price at grant date (C$ per share) $ 6.76 $ 5.24
v3.10.0.1
COST OF SALES (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]    
Operating costs $ 662.2 $ 632.3
Royalties 46.5 44.3
Depreciation expense 265.4 265.4
Cost of sales $ 974.1 $ 942.0
v3.10.0.1
GENERAL AND ADMINSTRATIVE EXPENSES (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]    
Salaries $ 23.1 $ 24.0
Director fees and expenses 0.9 1.0
Professional and consulting fees 5.6 5.8
Other administration costs 4.7 4.4
Share-based compensation 7.4 5.2
Gain on cash flow hedge (0.4) (0.7)
Depreciation expense 0.8 0.6
General and administrative $ 42.1 $ 40.3
v3.10.0.1
OTHER EXPENSES (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]    
Changes in asset retirement obligations at closed sites $ 7.3 $ 7.5
Write-down of assets 9.2 2.5
Other 5.0 8.3
Other expenses (income) $ 21.5 $ 18.3
v3.10.0.1
FINANCE COSTS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Borrowing costs [abstract]    
Interest expense $ 2.7 $ 7.1
Credit facility fees 4.9 2.9
Accretion expense 1.2 0.9
Finance costs 8.8 10.9
Interest paid $ 28.4 $ 32.7
v3.10.0.1
INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 20, 2017
May 08, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 16, 2017
Sep. 21, 2012
Analysis of income and expense [abstract]              
Interest income       $ 13,300,000 $ 9,400,000    
Gain (loss) on non-hedge derivatives and warrants       (9,100,000) 3,100,000    
Gain on sale of a 30% interest in the Côté Gold Project       0 19,200,000    
Amortization of gains related to flow-through common shares       0 3,600,000    
Gain (loss) on purchase and redemption of Senior notes       0 (20,200,000)    
Write-down of related party loan receivable       (10,900,000) 0    
Other gains       700,000 1,600,000    
Interest income and derivatives and other investment gains       $ (6,000,000) $ 16,700,000    
Senior Notes at 6.75%              
Analysis of income and expense [abstract]              
Gain (loss) on purchase and redemption of Senior notes     $ (20,200,000)        
Senior Notes at 6.75% | Fixed interest rate              
Investment [Line Items]              
Interest rate           6.75% 6.75%
Disposal Of Interest In Cote Gold Project              
Analysis of income and expense [abstract]              
Gain on sale of a 30% interest in the Côté Gold Project $ 19,200,000            
Investment [Line Items]              
Proportion of ownership interest sold in joint venture 30.00% 30.00%   30.00% 30.00%    
v3.10.0.1
EXPENSES BY NATURE (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]    
Salaries, short-term incentives, and other benefits $ 210.2 $ 208.7
Share-based compensation 8.0 5.5
Other 3.8 3.3
Expenses, by nature $ 222.0 $ 217.5
v3.10.0.1
CASH FLOW ITEMS - Other Non-Cash Items, Operating Activities (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Cash Flow Statement [Abstract]    
Share-based compensation $ 8,400,000 $ 5,900,000
Effects of exchange rate fluctuation on restricted cash 300,000 (1,600,000)
Amortization of gains related to flow-through common shares 0 (3,600,000)
Changes in estimates of environmental indemnities at closed sites 7,300,000 7,500,000
Other 2,700,000 1,400,000
Total adjustments for other non-cash items within operating activities $ 18,700,000 $ 9,600,000
v3.10.0.1
CASH FLOW ITEMS - Changes in Non-Cash Working Capital Items and Non-Current Ore Stockpiles (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Cash Flow Statement [Abstract]    
Receivables and other current assets $ (11.9) $ (1.8)
Inventories and non-current ore stockpiles (87.8) (21.3)
Accounts payable and accrued liabilities 2.4 24.4
Movements in non-cash working capital items and non-current ore stockpiles $ (97.3) $ 1.3
v3.10.0.1
CASH FLOW ITEMS - Changes in Other Investing Activities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Cash Flow Statement [Abstract]    
Disposal (acquisition) of investments $ (8.0) $ 9.0
Advances to related parties (1.2) (5.9)
Repayments from related parties 12.6 1.0
Prepayment for other assets (2.9) 0.0
Other 0.0 0.3
Other investing activities $ 0.5 $ 4.4
v3.10.0.1
CASH FLOW ITEMS - Reconciliation of Long-Term Debt Arising from Financing Activities (Details) - Long-term debt - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation Of Long-Term Debt Arising From Financing Activities [Roll Forward]    
Beginning balance $ 391.6 $ 485.1
Net proceeds from issuance of 7% Senior Notes 0.0 393.6
Non-cash changes:    
Amortization of deferred financing charges 0.8 0.9
Change in fair value of embedded derivative 6.1 (2.6)
Loss on redemption of 6.75% Senior Notes 0.0 20.2
Repayment of 6.75% Senior Notes 0.0 (505.6)
Ending balance $ 398.5 $ 391.6
v3.10.0.1
REVERSAL OF IMPAIRMENT CHARGES (Details)
$ in Millions
12 Months Ended
Jun. 05, 2017
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
$ / oz
Disclosure of impairment loss and reversal of impairment loss [line items]      
Reversal of impairment charges   $ 0.0 $ 524.1
Euro Ressources S. A. and Rosebel Gold Mines N. V.      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Life of mine used in current measurement of fair value less costs of disposal     11 years
Estimated gold price for the first five years (in dollars per ounce) | $ / oz     1,225
Estimated gold price after the first five years (in dollars per ounce) | $ / oz     1,200
Discount rate used in current measurement of fair value less costs of disposal     6.00%
Un-modeled mineralization for the CGU (in dollars per ounce) | $ / oz     45
Côté Gold      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Proportion of ownership interest sold in joint venture 30.00%    
Property, plant and equipment      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Reversal of impairment charges   0.0 $ 124.1
Reversal of impairment loss recognized in profit or loss, net of tax     79.9
Exploration and evaluation assets      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Reversal of impairment charges   $ 0.0 $ 400.0
v3.10.0.1
COMMITMENTS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Commitments [Line Items]    
Purchase obligations $ 110.2 $ 76.4
Capital expenditure obligations 36.6 29.7
Finance lease obligations 9.8 0.0
Operating leases 16.3 17.5
Total commitments 172.9 123.6
Royalties 46.5 44.3
Essakane S.A.    
Disclosure Of Commitments [Line Items]    
Royalties $ 25.0 22.3
Royalty percentage, conditional market price if market price is lower or equal to $1,000 per ounce 3.00%  
Royalty percentage, conditional market price if market price is between $1,000 and $1,300 per ounce 4.00%  
Royalty percentage, conditional market price if market price is great than $1,300 per ounce 5.00%  
Rosebel Gold Mines N.V.    
Disclosure Of Commitments [Line Items]    
Royalties $ 21.5 $ 22.0
In-kind royalty per ounce, percentage 2.00%  
Price participation percentage in excess of market price of $425 per ounce 6.50%  
Percent of minerals payable to charitable foundation 0.25%  
Less than One Year    
Disclosure Of Commitments [Line Items]    
Purchase obligations $ 107.2  
Capital expenditure obligations 31.8  
Finance lease obligations 2.4  
Operating leases 6.5  
Total commitments 147.9  
1-2 yrs    
Disclosure Of Commitments [Line Items]    
Purchase obligations 2.0  
Capital expenditure obligations 2.3  
Finance lease obligations 4.9  
Operating leases 8.2  
Total commitments 17.4  
3-5 yrs    
Disclosure Of Commitments [Line Items]    
Purchase obligations 0.8  
Capital expenditure obligations 2.3  
Finance lease obligations 2.5  
Operating leases 0.6  
Total commitments 6.2  
Greater than 5 Years    
Disclosure Of Commitments [Line Items]    
Purchase obligations 0.2  
Capital expenditure obligations 0.2  
Finance lease obligations 0.0  
Operating leases 1.0  
Total commitments $ 1.4  
v3.10.0.1
RELATED PARTY TRANSACTIONS Receivables and Other Current Assets From Related Parties (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of transactions between related parties [line items]    
Advances $ 900,000 $ 0
Joint ventures where entity is venturer | Non-Interest Bearing Receivable | Sadiola And Yatela    
Disclosure of transactions between related parties [line items]    
Amounts receivable, related party transactions beginning balance 100,000 200,000
Advances 300,000 900,000
Repayments (300,000) (1,000,000)
Amounts receivable, related party transactions ending balance 100,000 100,000
Joint ventures where entity is venturer | Interest Bearing Receivable    
Disclosure of transactions between related parties [line items]    
Amounts receivable, related party transactions beginning balance 36,300,000 31,300,000
Advances 900,000 5,000,000
Repayments (12,300,000) 0
Write-down of receivable (10,900,000) 0
Amounts receivable, related party transactions ending balance $ 14,000,000 $ 36,300,000
Joint ventures where entity is venturer | Interest Bearing Receivable | Floating interest rate    
Disclosure of transactions between related parties [line items]    
Related party transactions, interest rate basis 2.00%  
v3.10.0.1
RELATED PARTY TRANSACTIONS Compensation of Key Management Personnel (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Related Party [Abstract]    
Salaries and other benefits $ 7.1 $ 5.4
Share-based payments 4.4 3.6
Key management personnel compensation $ 11.5 $ 9.0
v3.10.0.1
SEGMENTED INFORMATION - BALANCE SHEETS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of operating segments [line items]    
Total non- current assets $ 2,874.1 $ 2,805.9
Total assets 3,961.0 3,966.9
Total liabilities 1,168.4 1,120.1
Gold mines    
Disclosure of operating segments [line items]    
Total non- current assets 2,256.8 2,189.6
Total assets 2,705.4 2,613.1
Total liabilities 710.6 666.1
Gold mines | BURKINA FASO    
Disclosure of operating segments [line items]    
Total non- current assets 865.3 849.3
Total assets 1,110.6 1,070.7
Total liabilities 210.6 204.8
Gold mines | SURINAME    
Disclosure of operating segments [line items]    
Total non- current assets 674.3 643.3
Total assets 847.1 825.4
Total liabilities 292.9 256.0
Gold mines | CANADA    
Disclosure of operating segments [line items]    
Total non- current assets 717.2 697.0
Total assets 747.7 717.0
Total liabilities 207.1 205.3
Exploration and evaluation and development    
Disclosure of operating segments [line items]    
Total non- current assets 465.6 437.8
Total assets 548.8 483.4
Total liabilities 11.8 9.6
Corporate    
Disclosure of operating segments [line items]    
Total non- current assets 151.7 178.5
Total assets 706.8 870.4
Total liabilities $ 446.0 $ 444.4
Société d'Exploitation des Mines d'Or de Sadiola S.A.    
Disclosure of operating segments [line items]    
Ownership interest in joint venture 41.00% 41.00%
Total non- current assets $ 103.1 $ 128.9
Total assets 166.0 179.9
Total liabilities $ 123.6 $ 149.6
Yatela    
Disclosure of operating segments [line items]    
Ownership interest in joint venture 40.00% 40.00%
v3.10.0.1
SEGMENTED INFORMATION - STATEMENT OF EARNINGS (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of operating segments [line items]    
Revenues $ 1,111.0 $ 1,094.9
Cost of sales 708.7 676.6
Depreciation expense 265.4 265.4
General and administrative 42.1 40.3
Exploration 39.2 38.4
Impairments (reversals) 0.0 (524.1)
Other expenses 21.5 18.3
Earnings from operations 34.1 580.0
Net capital expenditures 300.9 210.5
Operating Segments Including Incorporated Joint Ventures    
Disclosure of operating segments [line items]    
Revenues 1,187.5 1,177.0
Cost of sales 763.7 736.0
Depreciation expense 267.2 267.0
General and administrative 42.1 40.3
Exploration 39.4 39.8
Impairments (reversals)   (524.1)
Other expenses 25.0 18.3
Earnings from operations 50.1 599.7
Net capital expenditures 302.1 220.5
Société d'Exploitation des Mines d'Or de Sadiola S.A.    
Disclosure of operating segments [line items]    
Revenues 76.5 82.1
Cost of sales 55.0 59.4
Depreciation expense 1.8 1.6
General and administrative 0.0 0.0
Exploration 0.2 1.4
Impairments (reversals)   0.0
Other expenses 3.5 0.0
Earnings from operations 16.0 19.7
Net capital expenditures 1.2 10.0
Gold mines    
Disclosure of operating segments [line items]    
Revenues 1,110.6 1,094.5
Cost of sales 708.7 676.6
Depreciation expense 262.8 261.7
General and administrative 0.0 0.0
Exploration 4.6 5.0
Impairments (reversals)   (116.0)
Other expenses 16.0 8.9
Earnings from operations 118.5 258.3
Net capital expenditures 278.0 202.9
Gold mines | BURKINA FASO    
Disclosure of operating segments [line items]    
Revenues 564.1 547.4
Cost of sales 338.0 340.1
Depreciation expense 135.1 132.6
General and administrative 0.0 0.0
Exploration 0.0 0.0
Impairments (reversals)   0.0
Other expenses 7.0 0.0
Earnings from operations 84.0 74.7
Net capital expenditures 158.2 82.4
Gold mines | SURINAME    
Disclosure of operating segments [line items]    
Revenues 386.0 385.6
Cost of sales 260.7 231.0
Depreciation expense 82.7 83.8
General and administrative 0.0 0.0
Exploration 4.6 5.0
Impairments (reversals)   (116.0)
Other expenses 1.6 2.7
Earnings from operations 36.4 179.1
Net capital expenditures 64.7 59.4
Gold mines | CANADA    
Disclosure of operating segments [line items]    
Revenues 160.5 161.5
Cost of sales 110.0 105.5
Depreciation expense 45.0 45.3
General and administrative 0.0 0.0
Exploration 0.0 0.0
Impairments (reversals)   0.0
Other expenses 7.4 6.2
Earnings from operations (1.9) 4.5
Net capital expenditures 55.1 61.1
Exploration and evaluation and development    
Disclosure of operating segments [line items]    
Revenues 0.0 0.0
Cost of sales 0.0 0.0
Depreciation expense 0.0 0.2
General and administrative 0.0 0.2
Exploration 34.6 33.4
Impairments (reversals)   (400.0)
Other expenses 0.7 0.9
Earnings from operations (35.3) 365.3
Net capital expenditures 17.8 5.3
Corporate    
Disclosure of operating segments [line items]    
Revenues 0.4 0.4
Cost of sales 0.0 0.0
Depreciation expense 2.6 3.5
General and administrative 42.1 40.1
Exploration 0.0 0.0
Impairments (reversals)   (8.1)
Other expenses 4.8 8.5
Earnings from operations (49.1) (43.6)
Net capital expenditures $ 5.1 $ 2.3
v3.10.0.1
SUBSEQUENT EVENTS (Details) - Disposals of assets
Feb. 14, 2019
USD ($)
Jan. 15, 2019
USD ($)
oz
Disclosure of non-adjusting events after reporting period [line items]    
Prepayment amount   $ 170,000,000
Gold ounces deliverable in 2022 | oz   150,000
Floor price (in dollars per ounce)   $ 1,300
Cap price (in dollars per ounce)   $ 1,500
Annual interest rate   5.38%
Sadiola Exploration Limited    
Disclosure of non-adjusting events after reporting period [line items]    
Percent of participation in mine operations 80.00%  
Sale of participation in mines, consideration amount $ 1