Wheaton Precious Metals (WPM) 6-K 9 Aug 19 2019 Q2 2019 and Declares Third Quarterly Dividend of 2019 Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2019
Document and entity information [abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Registrant Name	WHEATON PRECIOUS METALS CORP.
Entity Central Index Key	0001323404
Current Fiscal Year End Date	--12-31

Condensed Interim Consolidated

Condensed Interim Consolidated Statements of (Loss) Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Profit or loss [abstract]
Sales	$ 189,466	$ 212,400	$ 414,515	$ 411,652
Cost of sales
Cost of sales, excluding depletion	60,957	62,580	130,171	118,994
Depletion	61,404	62,494	129,785	119,759
Total cost of sales	122,361	125,074	259,956	238,753
Gross margin	67,105	87,326	154,559	172,899
General and administrative	12,249	11,972	28,784	21,729
Impairment charges	165,912		165,912
(Loss) earnings from operations	(111,056)	75,354	(40,137)	151,170
Gain on disposal of mineral stream interest		(245,715)		(245,715)
Other (income) expense	3,090	(1,216)	2,824	(145)
(Loss) earnings before finance costs and income taxes	(114,146)	322,285	(42,961)	397,030
Finance costs	13,306	7,367	27,252	14,474
(Loss) earnings before income taxes	(127,452)	314,918	(70,213)	382,556
Income tax recovery	2,758	3,224	2,868	3,709
Net (loss) earnings	$ (124,694)	$ 318,142	$ (67,345)	$ 386,265
Basic (loss) earnings per share	$ (0.28)	$ 0.72	$ (0.15)	$ 0.87
Diluted (loss) earnings per share	$ (0.28)	$ 0.72	$ (0.15)	$ 0.87
Weighted average number of shares outstanding
Basic	445,769	443,191	445,083	442,961
Diluted	446,470	443,770	445,815	443,453

Condensed Interim Consolidate_2

Condensed Interim Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended								6 Months Ended						12 Months Ended
	Jun. 30, 2019		Mar. 31, 2019		Jun. 30, 2018		Mar. 31, 2018		Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018		Dec. 31, 2018
Statement of comprehensive income [abstract]
Net (loss) earnings	$ (124,694)		$ 57,349		$ 318,142		$ 68,123		$ (67,345)		$ 40,850		$ 386,265
Items that will not be reclassified to net earnings
Gain on LTIs	30,026				16,663				50,673				13,534
Income tax recovery (expense) related to LTIs¹	(1,956)	[1]			(3,233)	[1]			(2,001)	[1]			(3,691)	[1]	$ (2,662)
Total other comprehensive income	28,070	[2]	20,602	[2]	13,430	[2]	(3,586)	[2]	48,672		(52,491)	[2]	9,843
Total comprehensive (loss) income	$ (96,624)		$ 77,951		$ 331,572		$ 64,537		$ (18,673)		$ (11,641)		$ 396,108
[1]	LTIs = long-term investments - common shares held.
[2]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

Condensed Interim Consolidate_3

Condensed Interim Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 87,182	$ 75,767
Accounts receivable	1,324	2,186
Current taxes receivable	125	210
Other	2,653	1,541
Total current assets	91,284	79,704
Non-current assets
Mineral stream interests	5,861,139	6,156,839
Early deposit mineral stream interests	30,991	30,241
Mineral royalty interest	9,107	9,107
Long-term equity investments	216,328	164,753
Investment in associates	984	2,562
Convertible note receivable	11,836	12,899
Property, plant and equipment	7,621	3,626
Other	11,533	10,315
Total non-current assets	6,149,539	6,390,342
Total assets	6,240,823	6,470,046
Current liabilities
Accounts payable and accrued liabilities	17,451	19,883
Current taxes payable	13	3,361
Current portion of performance share units	6,913	5,578
Current portion of lease liabilities	647
Other	17	19
Total current liabilities	25,041	28,841
Non-current liabilities
Bank debt	1,095,500	1,264,000
Lease liabilities	3,833
Deferred income taxes	125	111
Performance share units	4,378	5,178
Total non-current liabilities	1,103,836	1,269,289
Total liabilities	1,128,877	1,298,130
Shareholders' equity
Issued capital	3,560,705	3,516,437
Reserves	51,207	7,893
Retained earnings	1,500,034	1,647,586
Total shareholders' equity	5,111,946	5,171,916
Total liabilities and shareholders' equity	$ 6,240,823	$ 6,470,046

Condensed Interim Consolidate_4

Condensed Interim Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net (loss) earnings	$ (124,694)	$ 318,142	$ (67,345)	$ 386,265
Adjustments for
Depreciation and depletion	61,871	62,727	130,745	120,232
Gain on disposal of mineral stream interest		(245,715)		(245,715)
Impairment charges	167,561		167,561
Interest expense	12,434	5,659	25,586	11,249
Equity settled stock based compensation	1,456	1,394	2,813	2,643
Performance share units	793	3,316	201	3,500
Income tax expense (recovery)	(2,758)	(3,224)	(2,868)	(3,709)
Loss on fair value adjustment of share purchase warrants held	7	12	7	111
Share in losses of associate			62	201
Fair value (gain) loss on convertible note receivable	1,934	(99)	1,063	1,290
Investment income recognized in net (loss) earnings	(297)	(299)	(539)	(502)
Other	242	287	670	513
Change in non-cash working capital	4,659	(1,772)	(2,511)	(4,847)
Cash generated from operations before income taxes and interest	123,208	140,428	255,445	271,231
Income taxes paid	(24)	(48)	(3,586)	(98)
Interest paid	(14,200)	(5,459)	(24,907)	(11,055)
Interest received	274	279	500	462
Cash generated from operating activities	109,258	135,200	227,452	260,540
Financing activities
Bank debt repaid	(88,000)	(79,000)	(168,500)	(186,000)
Bank debt drawn		372,500		372,500
Credit facility extension fees		(5)	(1,100)	(1,205)
Share purchase options exercised	5,502	878	20,393	1,027
Lease payments	(153)		(323)
Dividends paid	(63,515)	(64,589)	(63,515)	(64,589)
Cash (used for) generated from financing activities	(146,166)	229,784	(213,045)	121,733
Investing activities
Mineral stream interests		(610,235)	(174)	(610,235)
Early deposit mineral stream interests	(750)	(4,255)	(750)	(4,458)
Net proceeds on disposal of mineral stream interests		230,000		230,000
Acquisition of long-term investments	(909)	(1,016)	(909)	(1,016)
Investment in associate	(132)		(132)
Dividend income received	23	20	39	40
Other	(53)	(2,384)	(1,207)	(2,425)
Cash used for investing activities	(1,821)	(387,870)	(3,133)	(388,094)
Effect of exchange rate changes on cash and cash equivalents	130	(21)	141	(39)
(Decrease) increase in cash and cash equivalents	(38,599)	(22,907)	11,415	(5,860)
Cash and cash equivalents, beginning of period	125,781	115,568	75,767	98,521
Cash and cash equivalents, end of period	$ 87,182	$ 92,661	$ 87,182	$ 92,661

Condensed Interim Consolidate_5

Condensed Interim Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Number of Shares [member]	Issued Capital [member]	Share Purchase Warrants Reserve [member]	Share Purchase Options Reserve [member]	Reserves Restricted Share Units Reserve [member]	LTI revaluation reserve (net of tax) [member]	Total Reserves [member]	Retained Earnings [member]
Balance at beginning of period at Dec. 31, 2017		$ 4,899,664		$ 3,472,029	$ 83,077	$ 28,799	$ 5,178	$ (40,047)	$ 77,007	$ 1,350,628
Balance, shares at beginning of period at Dec. 31, 2017		442,724,309	442,724,000
Total comprehensive income
Net earnings		$ 68,123								68,123
OCI	[1]	(3,586)						(3,586)	(3,586)
Total comprehensive income		64,537						(3,586)	(3,586)	68,123
Income tax recovery (expense)		(59)		(59)
SBC expense	[1]	$ 1,249				651	598		1,249
RSUs released	[1]			1,473			(1,473)		(1,473)
RSUs released, shares		70,175	70,000
Dividends		$ (39,852)								(39,852)
Balance end of period at Mar. 31, 2018		$ 4,925,539		3,473,443	83,077	29,450	4,303	(43,633)	73,197	1,378,899
Balance, shares at end of period at Mar. 31, 2018		442,794,484	442,794,000
Balance at beginning of period at Dec. 31, 2017		$ 4,899,664		3,472,029	83,077	28,799	5,178	(40,047)	77,007	1,350,628
Balance, shares at beginning of period at Dec. 31, 2017		442,724,309	442,724,000
Total comprehensive income
Net earnings		$ 386,265
OCI		9,843
Total comprehensive income		396,108
Income tax recovery (expense)		(89)
Dividends										(79,739)
Balance end of period at Jun. 30, 2018		$ 5,234,615		3,489,643	83,077	29,836	5,109	(30,203)	87,819	1,657,153
Balance, shares at end of period at Jun. 30, 2018		443,559,922	443,560,000
Balance at beginning of period at Dec. 31, 2017		$ 4,899,664		3,472,029	83,077	28,799	5,178	(40,047)	77,007	1,350,628
Balance, shares at beginning of period at Dec. 31, 2017		442,724,309	442,724,000
Total comprehensive income
Income tax recovery (expense)		$ 1,923
Balance end of period at Dec. 31, 2018		$ 5,171,916		$ 3,516,437	83,077	31,002	5,970	(112,156)	7,893	1,647,586
Balance, shares at end of period at Dec. 31, 2018		444,336,361	444,336,000	444,336,361
Balance at beginning of period at Mar. 31, 2018		$ 4,925,539		$ 3,473,443	83,077	29,450	4,303	(43,633)	73,197	1,378,899
Balance, shares at beginning of period at Mar. 31, 2018		442,794,484	442,794,000
Total comprehensive income
Net earnings		$ 318,142								318,142
OCI	[1]	13,430						13,430	13,430
Total comprehensive income		331,572						13,430	13,430	318,142
Income tax recovery (expense)		(30)		(30)
SBC expense	[1]	1,394				584	810		1,394
Options exercised	[1]	$ 878		1,076		(198)			(198)
Options exercised, shares		46,800	47,000
RSUs released	[1]			4			(4)		(4)
RSUs released, shares		185	0
Dividends		$ (24,738)		15,150						(39,888)
Dividends (Note 19.2), shares		718,453	719,000
Balance end of period at Jun. 30, 2018		$ 5,234,615		3,489,643	83,077	29,836	5,109	(30,203)	87,819	1,657,153
Balance, shares at end of period at Jun. 30, 2018		443,559,922	443,560,000
Total comprehensive income
Net earnings		$ 40,850								40,850
OCI	[1]	(52,491)						(52,491)	(52,491)
Total comprehensive income		(11,641)						(52,491)	(52,491)	40,850
Income tax recovery (expense)		14,479		14,479
SBC expense	[1]	$ 2,789				1,166	1,623		2,789
RSUs released	[1]			762			(762)		(762)
RSUs released, shares		33,818	33,000
Realized gain on disposal of LTIs	[1]							(29,462)	(29,462)	29,462
Dividends		$ (68,326)		11,553						(79,879)
Dividends (Note 19.2), shares		742,621	743,000
Balance end of period at Dec. 31, 2018		$ 5,171,916		$ 3,516,437	83,077	31,002	5,970	(112,156)	7,893	1,647,586
Balance, shares at end of period at Dec. 31, 2018		444,336,361	444,336,000	444,336,361
Total comprehensive income
Net earnings		$ 57,349								57,349
OCI	[1]	20,602						20,602	20,602
Total comprehensive income		77,951						20,602	20,602	57,349
Income tax recovery (expense)		(92)		$ (92)
SBC expense	[1]	1,357				568	789		1,357
Options exercised		$ 14,890		18,762		(3,872)			(3,872)
Options exercised, shares		752,170	752,000
RSUs released	[1]			2,726			(2,726)		(2,726)
RSUs released, shares		130,730	131,000
Dividends		$ (40,074)								(40,074)
Balance end of period at Mar. 31, 2019		$ 5,225,948		3,537,833	83,077	27,698	4,033	(91,554)	23,254	1,664,861
Balance, shares at end of period at Mar. 31, 2019		445,219,261	445,219,000
Balance at beginning of period at Dec. 31, 2018		$ 5,171,916		$ 3,516,437	83,077	31,002	5,970	(112,156)	7,893	1,647,586
Balance, shares at beginning of period at Dec. 31, 2018		444,336,361	444,336,000	444,336,361
Total comprehensive income
Net earnings		$ (67,345)
OCI		48,672
Total comprehensive income		(18,673)
Income tax recovery (expense)		(986)
Dividends		(998,000)								(80,207)
Balance end of period at Jun. 30, 2019		$ 5,111,946		$ 3,560,705	83,077	26,771	4,843	(63,484)	51,207	1,500,034
Balance, shares at end of period at Jun. 30, 2019		446,265,488	446,265,000	446,265,488
Balance at beginning of period at Mar. 31, 2019		$ 5,225,948		$ 3,537,833	83,077	27,698	4,033	(91,554)	23,254	1,664,861
Balance, shares at beginning of period at Mar. 31, 2019		445,219,261	445,219,000
Total comprehensive income
Net earnings		$ (124,694)								(124,694)
OCI	[1]	28,070						28,070	28,070
Total comprehensive income		(96,624)						28,070	28,070	(124,694)
Income tax recovery (expense)		(894)		(894)
SBC expense	[1]	1,456				642	814		1,456
Options exercised	[1]	$ 5,501		7,070		(1,569)			(1,569)
Options exercised, shares		283,620	284,000
RSUs released	[1]			4			(4)		(4)
RSUs released, shares		185
Dividends		$ (23,441)		16,692						(40,133)
Dividends (Note 19.2), shares		762,422	762,000
Balance end of period at Jun. 30, 2019		$ 5,111,946		$ 3,560,705	$ 83,077	$ 26,771	$ 4,843	$ (63,484)	$ 51,207	$ 1,500,034
Balance, shares at end of period at Jun. 30, 2019		446,265,488	446,265,000	446,265,488
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

Description of Business and Nat

Description of Business and Nature of Operations	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Description of Business and Nature of Operations	1. Description of Business and Nature of Operations Wheaton Precious Metals Corp. is a mining company which generates its revenue primarily from the sale of precious metals. Wheaton Precious Metals Corp. (“Wheaton” or the “Company”), which is the ultimate parent company of its consolidated group, is incorporated and domiciled in Canada, and its principal place of business is at Suite 3500 - 1021 West Hastings Street, Vancouver, British Columbia, V6E 0C3. The Company trades on the Toronto Stock Exchange (“TSX”) and the New York Stock Exchange (“NYSE”) under the symbol WPM. The Company has entered into 23 long-term purchase agreements (three of which are early deposit agreements), with 17 different mining companies, for the purchase of precious metals and cobalt (“precious metal purchase agreements” or “PMPA”) relating to 19 mining assets which are currently operating, 9 which are at various stages of development and 2 which have been placed in care and maintenance, located in 11 countries. Pursuant to the PMPAs, Wheaton acquires metal production from the counterparties for an initial upfront payment plus an additional cash payment for each ounce or pound delivered which is fixed by contract, generally at or below the prevailing market price. The condensed interim consolidated financial statements of the Company for the three and six months ended June 30, 2019 were authorized for issue as of August 8, 2019 in accordance with a resolution of the Board of Directors.

Basis of Presentation and State

Basis of Presentation and Statement of Compliance	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Basis of Presentation and Statement of Compliance	2. Basis of Presentation and Statement of Compliance These unaudited condensed interim consolidated financial statements have been prepared on a historical cost basis, except for certain financial instruments which have been measured at fair value as at the relevant balance sheet date. The consolidated financial statements are presented in United States (“US”) dollars, which is the Company’s functional currency, and all values are rounded to the nearest thousand US dollars (US$ 000’s) unless otherwise noted. References to “Cdn$” refer to Canadian dollars. These unaudited condensed interim consolidated financial statements have been prepared in accordance with IAS 34, Interim Financial Reporting (“IAS 34”). The accounting policies applied in these unaudited condensed interim consolidated financial statements are based on International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”) and have been prepared using the same accounting policies and methods of application as disclosed in Note 3 to the audited consolidated financial statements for the year ended December 31, 2018 and were consistently applied to all the periods presented unless otherwise stated below. These unaudited condensed interim consolidated financial statements do not include all the information and note disclosures required by IFRS for annual consolidated financial statements and therefore should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2018. The preparation of financial statements in accordance with IAS 34 requires the use of certain accounting estimates. It also requires management to exercise judgment in applying the Company’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the financial statements, are disclosed in Note 4. In the opinion of management, all adjustments (including normal recurring adjustments) necessary to present fairly the financial position at June 30, 2019 and the results of operations and cash flows for all periods presented have been made. The interim results are not necessarily indicative of results for a full year.

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Significant Accounting Policies	3. Significant Accounting Policies 3.1. New Accounting Standards Effective in 2019 IFRIC 23 – Uncertainty over Income Tax Treatments: On January 1, 2019, the Company adopted IFRIC 23 – Uncertainty over Income Tax Treatments. IFRIC 23 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 adoption of this guidance did not have a material impact on the Company’s Consolidated Statement of Earnings. IFRS 16 – Leases: General Impact of Application of IFRS 16 - Leases On January 1, 2019, the Company adopted IFRS 16 – Leases (“IFRS16”), which supersedes IAS 17 – Leases (“IAS 17”). IFRS 16 removes the distinction between operating leases and finance leases and instead has all leases accounted for as a finance lease which requires the recognition of a right-of-use right-of The Company determined that it had two leases which are subject to the provisions of IFRS 16, specifically related to its offices in Vancouver, Canada and the Cayman Islands. As a result, at January 1, 2019, the Company recognized an additional $5 million of right-of-use The Company has applied the new standard prospectively with no restatement of the prior periods. A reconciliation of the lease commitment relative to these two leases as reported on the financial statements for the year ended December 31, 2018 and the lease liability which has been reflected on the balance sheet effective January 1, 2019 is as follows: (in thousands) Lease commitment as disclosed at December 31, 2018 Not later than 1 year $ 789 Later than 1 year and not later than 5 years 2,772 Later than 5 years 224 Total lease commitment as disclosed at December 31, 2018 $ 3,785 Extension option reasonably certain to be exercised 1 1,530 Less: Discounting using the incremental borrowing rate 2 (636 ) Lease liability as at January 1, 2019 $ 4,679 Lease liability is comprised of: Current portion $ 679 Long-term portion 4,000 Lease liability as at January 1, 2019 $ 4,679 1)  The Company’s office lease in the Cayman Islands contains two optional extension periods. Upon applying IFRS 16, the Company concluded it was reasonably certain to exercise the first extension period. The second extension period, which covers a term of 5 years, was not included in the calculation of the lease liability. 2)  The future cash outflows were discounted using the Company’s estimated incremental borrowing rate ranging from 3.9764% to 4.3340%.       Accounting Policy – The Company as a Lessee At inception of a contract, the Company assesses whether the contract is, or contains, a lease. A contract is, or contains, a lease if the contract conveys the right to use an identified asset for a period of time in exchange for consideration. The Company recognizes a right-of-use The lease liability is initially measured at the present value of the lease payments that are not paid at the commencement date discounted by using the rate implicit in the lease. If this rate cannot be readily determined, the Company uses its incremental borrowing rate. The lease liability is subsequently measured by increasing the carrying amount to reflect interest on the lease liability (using the effective interest method) and by reducing the carrying amount to reflect the lease payments made. The Company re-measures right-of-use re-measured The right-of-use

Key Sources of Estimation Uncer

Key Sources of Estimation Uncertainty and Critical Accounting Judgments	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Key Sources of Estimation Uncertainty and Critical Accounting Judgments	4. Key Sources of Estimation Uncertainty and Critical Accounting Judgments The preparation of the Company’s condensed interim consolidated financial statements 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. However, actual outcomes can differ from these estimates. Information about significant areas of estimation uncertainty and judgments made by management in preparing the consolidated financial statements are described below. Key Sources of Estimation Uncertainty 4.1. Attributable Reserve, Resource and Exploration Potential Estimates Mineral stream interests are significant assets of the Company, with a carrying value of $5.9 billion at June 30, 2019. This amount represents the capitalized expenditures related to the acquisition of the mineral stream interests, net of accumulated depletion and accumulated impairment charges, if any. The Company estimates the reserves, resources and exploration potential relating to each agreement. Reserves are estimates of the amount of metals contained in ore that can be economically and legally extracted from the mining properties in respect of which the Company has PMPAs. Resources are estimates of the amount of metals contained in mineralized material for which there is a reasonable prospect for economic extraction from the mining properties in respect of which the Company has PMPAs. Exploration potential represents an estimate of additional reserves and resources which may be discovered through the mine operator’s exploration program. The Company adjusts its estimates of reserves, resources (where applicable) and exploration potential (where applicable) to reflect the Company’s percentage entitlement to metals produced from such mines. The Company compiles its estimates of its reserves and resources based on information supplied by appropriately qualified persons relating to the geological data on the size, density and grade of the ore body, and require complex geological and geostatistical judgments to interpret the data. The estimation of recoverable reserves and resources is based upon factors such as estimates of foreign exchange rates, commodity prices, future capital requirements, and production costs along with geological assumptions and judgments made in estimating the size and grade of the ore body. The Company estimates exploration potential based on assumptions surrounding the ore body continuity which requires judgment as to future success of any exploration programs undertaken by the mine operator. Changes in the reserve estimates, resource estimates or exploration potential estimates may impact upon the carrying value of the Company’s mineral stream interests and depletion charges. 4.2. Depletion The Company’s mineral stream interests are separately allocated to reserves, resources and exploration potential. The value allocated to reserves is classified as depletable and is depleted on a unit-of-production non-depletable 4.3. Impairment of Assets As more fully described in Note 11, the Company assesses each PMPA at the end of every reporting period to determine whether any indication of impairment or impairment reversal exists. If such an indication exists, the recoverable amount of the PMPA is estimated in order to determine the extent of the impairment or impairment reversal (if any). The calculation of the recoverable amount requires the use of estimates and assumptions such as long-term commodity prices, discount rates, recoverable ounces of attributable metals, and operating performance. The price of precious metals and cobalt has been extremely volatile over the past several years. The Company monitors spot and forward metal prices and if necessary re-evaluates re-evaluate 4.4. Valuation of Stock Based Compensation The Company has various forms of stock based compensation, including share purchase options, restricted share units (“RSUs”) and performance share units (“PSUs”). The calculation of the fair value of share purchase options, RSUs and PSUs issued requires the use of estimates as more fully described in Notes 20.2, 20.3, and 21.1, respectively. 4.5. Valuation of Convertible Note Receivable As more fully described in Note 15, the Company measures its convertible note receivable with Kutcho Copper Corp. (“Kutcho”) at fair value for financial reporting purposes. This calculation requires the use of estimates and assumptions such as rate of interest prevailing at the balance sheet date for instruments of similar term and risk, expected dividend yield, expected volatility and expected remaining life of the convertible note receivable. 4.6. Valuation of Minto Derivative Liability As more fully described in Note 5.3, the Company’s Minto PMPA has a pricing mechanism whereby there is an increase to the production payment per ounce of gold delivered to Wheaton over the current fixed price in periods where the market price of copper is lower than $2.50 per pound. As this pricing mechanism meets the definition of a derivative, it is reflected at fair value for financial reporting purposes. This calculation requires the use of estimates and assumptions such as long-term price of copper, recoverable ounces of gold and operating performance. 4.7. Contingencies Due to the size, complexity and nature of the Company’s operations, various legal and tax matters are outstanding from time to time, including those matters described in Note 26. By their nature, contingencies will only be resolved when one or more future events occur or fail to occur. The assessment of contingencies inherently involves the exercise of significant judgment and estimates of the outcome of future events. If the Company is unable to resolve any of these matters favorably, there may be a material adverse impact on the Company’s financial performance, cash flows or results of operations. In the event that management’s estimate of the future resolution of these matters changes, the Company will recognize the effects of the changes in its consolidated financial statements in the appropriate period relative to when such changes occur. Critical Accounting Judgments 4.8. Functional Currency The functional currency for the Company and each of its subsidiaries is the currency of the primary economic environment in which the entity operates. As a result of the following factors, the Company has determined that the functional currency of each entity is the US dollar: ● The entities’ revenues are denominated in US dollars; ● The entities’ cash cost of sales are denominated in US dollars; ● The majority of the entities’ cash is held in US dollars; and ● The Company generally seeks to raise capital in US dollars. Determination of the functional currency may involve certain judgments to determine the primary economic environment and the Company reconsiders the functional currency of its entities if there is a change in events and conditions which determined the primary economic environment. 4.9. Significant Influence over Kutcho Note 14 describes Kutcho as an associate though the Company only owns an 11% ownership interest in Kutcho. The Company has determined it has significant influence over Kutcho by virtue of the convertible instruments of Kutcho that the Company owns. 4.10. Income Taxes The interpretation and application of existing tax laws, regulations or rules in Canada, the Cayman Islands, Barbados, Luxembourg, the Netherlands or any of the countries in which the Company’s subsidiaries or the mining operations are located or to which deliveries of precious metals, precious metal credits or cobalt are made requires the use of judgment. The likelihood that tax positions taken will be sustained is assessed based on facts and circumstances of the relevant tax position considering all available evidence. Differing interpretation of these laws, regulations or rules could result in an increase in the Company’s taxes, or other governmental charges, duties or impositions. Refer to Note 26 for more information. In assessing the probability of realizing deferred income tax assets, the Company makes estimates related to expectations of future taxable income and expected timing of reversals of existing temporary differences. Such estimates are based on forecasted cash flows from operations which require the use of estimates and assumptions such as long-term commodity prices and recoverable metal ounces. The estimates and assumptions are consistent with those used in testing asset impairment of PMPAs. The amount of deferred income tax assets recognized on the balance sheet could be reduced if the actual results differ significantly from forecast. The Company reassesses its deferred income tax assets at the end of each reporting period. 4.11. Leases As more fully described in Note 3.1, on January 1, 2019, the Company adopted IFRS 16 – Leases. Under IFRS 16, the Company assesses whether a contract contains a lease and, if so, recognizes a lease liability by discounting the future lease payments by using the Company’s estimated incremental borrowing rate. If the lease agreement contains an option to extend the lease, the Company must assess the likelihood of whether that option will be exercised. The determination of whether an option to extend a lease will be exercised requires significant management judgment, and providing the Company concludes that it is reasonably certain that the option to extend will be exercised, the lease payments during the extension period will comprise part of the right-of-use

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Fair Value Measurements	5. Fair Value Measurements The Company classifies its fair value measurements within a fair value hierarchy, which reflects the significance of the inputs used in making the measurements as defined in IFRS 13 – Fair Value Measurements (“IFRS 13”). Level 1 - Unadjusted quoted prices at the measurement date for identical assets or liabilities in active markets. Level 2 - Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3 - Unobservable inputs which are supported by little or no market activity. The following table sets forth the Company’s financial assets and liabilities measured at fair value by level within the fair value hierarchy. As required by IFRS 13, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. June 30, 2019 (in thousands) Note Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 87,182 $ 87,182 $ - $ - Trade receivables from provisional concentrate sales, net of fair value adjustment 9 98 - 98 - Long-term investments - common shares held 16 216,319 216,319 - - Long-term investments - warrants held 16 9 - 9 - Convertible note receivable 15 11,836 - - 11,836 $ 315,444 $ 303,501 $ 107 $ 11,836 December 31, 2018 (in thousands) Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 75,767 $ 75,767 $ - $ - Trade receivables from provisional concentrate sales, net of fair value adjustment 9 1,332 - 1,332 - Long-term investments - common shares held 16 164,753 164,753 - - Long-term investments - warrants held 16 - - - - Convertible note receivable 15 12,899 - - 12,899 $ 254,751 $ 240,520 $ 1,332 $ 12,899 Other accounts receivables and accounts payables and accrued liabilities are non-interest The Company’s bank debt (Note 18.1) is reported at amortized cost using the effective interest method. The carrying value of the bank debt approximates its fair value. 5.1. Valuation Techniques for Level 1 Assets Cash and Cash Equivalents The Company’s cash and cash equivalents are valued using quoted market prices in active markets and, as such, are classified within Level 1 of the fair value hierarchy. Long-Term Investments in Common Shares Held The Company’s long-term investments in common shares held are valued using quoted market prices in active markets and, as such, are classified within Level 1 of the fair value hierarchy. The fair value of the long-term investments in common shares held is calculated as the quoted market price of the common share multiplied by the quantity of shares held by the Company. 5.2. Valuation Techniques for Level 2 Assets Accounts Receivable Arising from Sales of Metal Concentrates The Company’s trade receivables and accrued liabilities from provisional concentrate sales are valued based on forward prices of gold and silver to the expected date of final settlement (Note 6). As such, these receivables and/or liabilities are classified within Level 2 of the fair value hierarchy. Long-Term Investments in Warrants Held The fair value of the Company’s long-term investments in warrants held that are not traded in an active market are determined using a Black-Scholes model based on assumptions including risk free interest rate, expected dividend yield, expected volatility and expected warrant life which are supported by observable current market conditions and as such are classified within Level 2 of the fair value hierarchy. The use of reasonably possible alternative assumptions would not significantly affect the Company’s results. 5.3. Valuation Techniques for Level 3 Assets Convertible Note Receivable The fair value of the Kutcho Convertible Note receivable (Note 15), which is not traded in an active market, is determined by discounting the stream of future interest and principal payments at the rate of interest prevailing at the balance sheet date for instruments of similar term and risk (the market interest rate), and adding this value to the value of the convertibility feature which is estimated using a Black-Scholes model based on assumptions including risk free interest rate, expected dividend yield, expected volatility and expected remaining life of the Kutcho Convertible Note receivable. As the expected volatility and market interest rate are not observable inputs, the Kutcho Convertible Note receivable is classified within Level 3 of the fair value hierarchy and any changes in fair value are reflected on the Consolidated Statement of Earnings under the classification Other (Income) Expense (Note 8). Management estimates that the market interest rate on similar borrowings without the conversion feature was approximately 18% and has used an implied volatility of 30% in valuing the convertibility feature. Holding all other variables constant, a fluctuation in interest rates of 1% would have impacted the valuation by approximately $0.8 million. Minto Derivative Liability The production payment per ounce of gold delivered to Wheaton under the Minto PMPA is to be increased over the fixed price in periods where the market price of copper is lower than $2.50 per pound. As this pricing mechanism meets the definition of a derivative, it is reflected at fair value for financial reporting purposes. At June 30, 2019 and December 31, 2018, the Company estimated the fair value of this derivative liability to be $NIL. The Minto mine was placed into care and maintenance in October 2018.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Revenue	6. Revenue Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Sales Gold Gold credit sales $ 117,873 62% $ 110,688 52% $ 263,991 64% $ 201,545 49% Concentrate sales 997 1% 3,065 2% 5,279 1% 5,294 1% $ 118,870 63% $ 113,753 54% $ 269,270 65% $ 206,839 50% Silver Silver credit sales $ 48,446 25% $ 87,620 41% $ 100,097 24% $ 182,109 44% Concentrate sales 14,867 8% 11,027 5% 30,377 7% 22,704 6% $ 63,313 33% $ 98,647 46% $ 130,474 31% $ 204,813 50% Palladium Palladium credit sales $ 7,283 4% $ - 0% $ 14,771 4% $ - 0% Total sales revenue $ 189,466 100% $ 212,400 100% $ 414,515 100% $ 411,652 100% Gold, Silver and Palladium Credit Sales Under certain PMPAs, precious metal is acquired from the mine operator in the form of precious metal credits, which is then sold through a network of third party brokers or dealers. Revenue from precious metal credit sales is recognized at the time of the sale of such credits, which is also the date that control of the precious metal is transferred to the customer. The Company will occasionally enter into forward contracts in relation to precious metal deliveries that it is highly confident will occur within a given quarter. No forward contracts were outstanding at June 30, 2019 or December 31, 2018. The sales price is fixed at the delivery date based on either the terms of these short-term forward sales contracts or the spot price of precious metal. Concentrate Sales Under certain PMPAs, gold and/or silver is acquired from the mine operator in concentrate form, which is then sold under the terms of the concentrate sales contracts to third-party smelters or traders. Where the Company acquires precious metal in concentrate form, final precious metal prices are set on a specified future quotational period (the “Quotational Period”) pursuant to the concentrate sales contracts with third-party smelters, typically one to three months after the shipment date, based on market prices for precious metal. The contracts, in general, provide for a provisional payment based upon provisional assays and quoted gold and silver prices. Final settlement is based upon the average applicable price for the Quotational Period applied to the actual number of precious metal ounces recovered calculated using confirmed smelter weights and settlement assays. Revenues and the associated cost of sales are recorded on a gross basis under these contracts at the time title passes to the buyer, which is also the date that control of the precious metal is transferred to the customer. The Company has concluded that the adjustments relating to the final assay results for the quantity of concentrate sold and the retroactive pricing adjustment for the Quotational Period are not significant and do not constrain the recognition of revenue.

General and Administrative

General and Administrative	6 Months Ended
	Jun. 30, 2019
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General and Administrative	7. General and Administrative Three Months Ended June 30 Six Months Ended June 30 (in thousands) Note 2019 2018 2019 2018 Salaries and benefits Salaries and benefits, excluding PSUs $ 3,771 $ 3,458 $ 7,668 $ 7,049 PSUs 1 21.1 2,417 3,316 9,541 3,499 Total salaries and benefits $ 6,188 $ 6,774 $ 17,209 $ 10,548 Depreciation 467 233 960 473 Donations 333 439 809 1,138 Professional fees 970 515 1,333 1,876 Other 2,835 2,617 5,660 5,051 General and administrative before equity settled stock based compensation $ 10,793 $ 10,578 $ 25,971 $ 19,086 Equity settled stock based compensation 2 Stock options 20.2 $ 642 $ 584 $ 1,210 $ 1,235 RSUs 20.3 814 810 1,603 1,408 Total equity settled stock based compensation $ 1,456 $ 1,394 $ 2,813 $ 2,643 Total general and administrative $ 12,249 $ 11,972 $ 28,784 $ 21,729 1)  The PSU accrual related to the anticipated fair value of the PSUs issued uses a weighted average performance factor of 181% during the three and six months ended June 30, 2019 as compared to 83% during the comparable period of 2018. 2)  Equity settled stock based compensation is a non-cash

Other (Income) Expense

Other (Income) Expense	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Other (Income) Expense	8.   Other (Income) Expense           Three Months Ended June 30 Six Months Ended June 30 (in thousands) Note 2019 2018 2019 2018 Interest income $ (274) $ (279) $ (500) $ (462) Dividends received 16 (23) (18) (39) (39) Guarantee fees - Primero Revolving Credit Facility - (858) - (858) Fees for contract amendments and reconciliations - - - (248) Share of losses of associate 14 - - 62 201 Impairment loss - investment in associate 14 1,649 - 1,649 - Foreign exchange loss (gain) 146 26 819 (144) Net (gain) loss arising on financial assets mandatorily measured at FVTPL ¹ Loss on fair value adjustment of share purchase warrants held 16 7 12 7 111 (Gain) loss on fair value adjustment of Kutcho Convertible Note 15 1,934 (99) 1,063 1,290 Other (349) - (237) 4 Total other (income) expense $ 3,090 $ (1,216) $ 2,824 $ (145) 1) FVTPL refers to Fair Value Through Profit or Loss.

Accounts Receivable

Accounts Receivable	6 Months Ended
	Jun. 30, 2019
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Accounts Receivable	9. Accounts Receivable (in thousands) Note June 30 2019 December 31 2018 Trade receivables from provisional concentrate sales, net of fair value adjustment 6 $ 98 $ 1,332 Other accounts receivable 1,226 854 Total accounts receivable $ 1,324 $ 2,186

Mineral Stream Interests

Mineral Stream Interests	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Mineral Stream Interests	10. Mineral Stream Interests Six Months Ended June 30, 2019 Cost Accumulated Depletion & Impairment 1 Carrying (in thousands) Balance Jan 1, 2019 Additions Balance Jun 30, 2019 Balance Jan 1, 2019 Depletion Impairment Balance Jun 30, 2019 Amount Jun 30, 2019 Gold interests Salobo $ 3,059,876 $ - $ 3,059,876 $ (353,816) $ (54,363) $ - $ (408,179) $ 2,651,697 Sudbury 2 623,864 - 623,864 (257,401) (10,135) - (267,536) 356,328 Constancia 136,058 - 136,058 (18,511) (3,583) - (22,094) 113,964 San Dimas 220,429 - 220,429 (12,234) (6,747) - (18,981) 201,448 Stillwater 239,357 (4) 239,353 (2,925) (3,195) - (6,120) 233,233 Other 3 402,232 - 402,232 (380,873) (4,113) - (384,986) 17,246 $ 4,681,816 $ (4) $ 4,681,812 $ (1,025,760) $ (82,136) $ - $ (1,107,896) $ 3,573,916 Silver interests Peñasquito $ 524,626 - 524,626 $ (135,904) $ (6,359) $ - $ (142,263) $ 382,363 Antamina 900,343 - 900,343 (190,266) (21,310) - (211,576) 688,767 Constancia 302,948 - 302,948 (56,717) (9,095) - (65,812) 237,136 Other 4 1,283,039 6 1,283,045 (780,401) (5,969) - (786,370) 496,675 $ 3,010,956 $ 6 $ 3,010,962 $ (1,163,288) $ (42,733) $ - $ (1,206,021) $ 1,804,941 Palladium interests Stillwater $ 263,726 $ (5) $ 263,721 $ (4,033) $ (4,916) $ - $ (8,949) $ 254,772 Cobalt interests Voisey’s Bay $ 393,422 $ - $ 393,422 $ - $ - $ (165,912) $ (165,912) $ 227,510 $ 8,349,920 $ (3) $ 8,349,917 $ (2,193,081) $ (129,785) $ (165,912) $ (2,488,778) $ 5,861,139 1) Includes cumulative impairment charges to June 30, 2019 as follows: Keno Hill silver interest - $11 million; Pascua-Lama silver interest - $338 million; 777 silver interest - $64 million; 777 gold interest - $151 million; Sudbury gold interest - $120 million; and Voisey’s Bay cobalt interest - $166 million. 2) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 3) Comprised of the Minto, Rosemont and 777 gold interests. 4) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Rosemont and 777 silver interests. Year Ended December 31, 2018 Cost Accumulated Depletion & Impairment 1 Carrying Amount Dec 31, 2018 (in thousands) Balance Jan 1, 2018 Additions Disposal Balance Dec 31, 2018 Balance Jan 1, 2018 Depletion Disposal Balance Dec 31, 2018 Gold interests Salobo $ 3,059,876 $ - $ - $ 3,059,876 $ (251,144) $ (102,672) $ - $ (353,816) $ 2,706,060 Sudbury 2 623,864 - - 623,864 (243,876) (13,525) - (257,401) 366,463 Constancia 136,058 - - 136,058 (14,007) (4,504) - (18,511) 117,547 San Dimas - 220,429 - 220,429 - (12,234) - (12,234) 208,195 Stillwater - 239,357 - 239,357 - (2,925) - (2,925) 236,432 Other 3 402,232 - - 402,232 (370,414) (10,459) - (380,873) 21,359 $ 4,222,030 $ 459,786 $ - $ 4,681,816 $ (879,441) $ (146,319) $ - $ (1,025,760) $ 3,656,056 Silver interests San Dimas $ 190,331 $ - $ (190,331) $ - $ (55,469) $ (3,575) $ 59,044 $ - $ - Peñasquito 524,626 - - 524,626 (121,376) (14,528) - (135,904) 388,722 Antamina 900,343 - - 900,343 (142,705) (47,561) - (190,266) 710,077 Constancia 302,948 - - 302,948 (41,145) (15,572) - (56,717) 246,231 Other 4 1,282,837 202 - 1,283,039 (759,702) (20,699) - (780,401) 502,638 $ 3,201,085 $ 202 $ (190,331) $ 3,010,956 $ (1,120,397) $ (101,935) $ 59,044 $ (1,163,288) $ 1,847,668 Palladium interests Stillwater $ - $ 263,726 - $ 263,726 $ - $ (4,033) - $ (4,033) $ 259,693 Cobalt interests Voisey’s Bay $ - $ 393,422 - $ 393,422 $ - $ - - $ - $ 393,422 $ 7,423,115 $ 1,117,136 $ (190,331) $ 8,349,920 $ (1,999,838) $ (252,287) $ 59,044 $ (2,193,081) $ 6,156,839 1) Includes cumulative impairment charges to December 31, 2018 as follows: Keno Hill silver interest - $11 million; Pascua-Lama silver interest - $338 million; 777 silver interest - $64 million; 777 gold interest - $151 million; and Sudbury gold interest - $120 million. 2) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 3) Comprised of the Minto, Rosemont and 777 gold interests. 4) Comprised of the currently owned Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Rosemont and 777 silver interests in addition to the Lagunas Norte, Pierina and Veladero silver interests, all of which expired on March 31, 2018. The value allocated to reserves is classified as depletable upon a mining operation achieving first production and is depleted on a unit-of-production non-depletable June 30, 2019 December 31, 2018 (in thousands) Depletable Non- Depletable Total Depletable Non- Depletable Total Gold interests Salobo $ 2,125,107 $ 526,590 $ 2,651,697 $ 2,171,292 $ 534,768 $ 2,706,060 Sudbury 1 303,126 53,202 356,328 308,041 58,422 366,463 Constancia 104,821 9,143 113,964 108,403 9,144 117,547 San Dimas 94,674 106,774 201,448 101,421 106,774 208,195 Stillwater 206,401 26,832 233,233 209,569 26,863 236,432 Other 2 17,246 - 17,246 21,359 - 21,359 $ 2,851,375 $ 722,541 $ 3,573,916 $ 2,920,085 $ 735,971 $ 3,656,056 Silver interests Peñasquito $ 295,153 $ 87,210 $ 382,363 $ 284,194 $ 104,528 $ 388,722 Antamina 342,105 346,662 688,767 353,679 356,398 710,077 Constancia 221,123 16,013 237,136 230,983 15,248 246,231 Other 3 92,676 403,999 496,675 87,386 415,252 502,638 $ 951,057 $ 853,884 $ 1,804,941 $ 956,242 $ 891,426 $ 1,847,668 Palladium interests Stillwater $ 243,288 $ 11,484 $ 254,772 $ 248,299 $ 11,394 $ 259,693 Cobalt interests Voisey’s Bay $ - $ 227,510 $ 227,510 $ - $ 393,422 $ 393,422 $ 4,045,720 $ 1,815,419 $ 5,861,139 $ 4,124,626 $ 2,032,213 $ 6,156,839 1) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 2) Comprised of the Minto, Rosemont and 777 gold interests. 3) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Rosemont and 777 silver interests. Termination of the San Dimas Silver Interest and Acquisition of the San Dimas Gold Interest On October 15, 2004, the Company entered into an agreement with Goldcorp Inc. (“Goldcorp”) to acquire an amount equal to 100% of the silver produced by Goldcorp’s Luismin mining operations in Mexico, including the San Dimas mine. On August 6, 2010, Goldcorp completed the sale of San Dimas to Primero Mining Corp. (“Primero”), and pursuant to the amended silver purchase agreement with Primero (the “San Dimas SPA”), the Company acquired 100% of the payable silver produced at San Dimas up to 6 million ounces annually, and 50% of any excess for the life of the mine. Goldcorp also provided a guarantee with respect to the delivery by Primero of all silver produced and owing to the Company until 2029 (the “Goldcorp Guarantee”). On May 10, 2018, First Majestic Silver Corp. (“First Majestic”) completed the acquisition of all the issued and outstanding common shares of Primero (the “Acquisition”). In connection with the Acquisition, on May 10, 2018, the Company terminated the San Dimas SPA and entered into a new precious metal purchase agreement with First Majestic relating to the San Dimas mine (the “San Dimas PMPA”). As consideration for terminating the San Dimas SPA, the Company received a cash payment of $220 million and 20,914,590 First Majestic common shares with a fair value of $151 million (the “First Majestic Shares”), and the Goldcorp Guarantee was terminated in exchange for a payment of $10 million, with the net result being that the Company has reflected a gain on disposal during the six months ended June 30, 2018 of the San Dimas SPA in the amount of $246 million, calculated as follows: (in thousands) Cash received $ 220,000 Fair value of First Majestic shares received 151,000 Fee from Goldcorp in exchange for release from the guarantee of deliveries relative to San Dimas 10,000 Total net proceeds from the disposal of the San Dimas SPA $ 381,000 Less: carrying value plus closing costs (135,285 ) Gain on disposal of the San Dimas SPA $ 245,715

Impairment of Mineral Stream In

Impairment of Mineral Stream Interests	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Impairment of Mineral Stream Interests	11. Impairment of Mineral Stream Interests Management considers each PMPA to be a separate cash generating unit (“CGU”), which is the lowest level for which cash inflows are largely independent of those of other assets. At the end of each reporting period, the Company assesses each PMPA to determine whether any indication of impairment or impairment reversal exists. If such an indication exists, the recoverable amount of the PMPA is estimated in order to determine the extent of the impairment (if any). The recoverable amount of each PMPA is the higher of fair value less cost of disposal (“FVLCD”) and value in use (“VIU”). In determining the recoverable amounts of each of the Company’s CGU’s, the Company uses the FVLCD as this will generally be greater than or equal to the VIU. To determine the FVLCD that could be received from each PMPA in an arm’s length transaction at the measurement date, the Company estimates a range of potential values using the net asset value (“NAV”) methodology and the net present value (“NPV”) methodology (as described below), and then selects a value within this range which is the most representative of the estimated recoverable amount of the stream. NAV is estimated by using an appropriate discount rate to calculate the present value of the expected future cash flows associated with each mineral category. The values are adjusted for each mineral category dependent on the likelihood of conversion from resources to reserves. A market multiple is applied to the NAV computed in order to assess the estimated fair value. Precious metal companies typically trade at a market capitalization that is based on a multiple of their underlying NAV, with this market multiple being generally understood to take account of a variety of additional value and risk factors such as the ability to find and produce more metal than what is currently included in the life of mine plan, the benefit of precious metal price optionality, the potential remaining mine life and adjustments for relative mine and country risk. Consequently, a market participant would generally apply a NAV multiple when estimating the fair value of a precious metal interest. NPV is estimated by using a nominal discount rate to calculate the present value of expected future cash flows. The expected future cash flows are management’s best estimates of expected future revenues and costs. Under each valuation methodology, expected future revenues reflect an estimate of future payable production for each mine at which the Company has a PMPA based on detailed life of mine plans received from each of the mine operators. Expected future revenues also reflect management’s estimated long-term metal prices. Estimated future cash costs are generally fixed based on the terms of each PMPA, as disclosed in Note 26. If the carrying amount of the PMPA exceeds its recoverable amount, the PMPA is considered impaired and an impairment charge is reflected as a component of net earnings so as to reduce the carrying amount to its recoverable value. A previously recognized impairment charge is reversed only if there has been an indicator of a potential impairment reversal and the resulting assessment of the PMPA’s recoverable amount exceeds its carrying value. If this is the case, the carrying amount of the PMPA is increased to its recoverable amount. The increased amount cannot exceed the carrying amount that would have been determined, net of depletion, had no impairment charge been recognized for the PMPA in prior years. Such reversal is reflected as a component of net earnings. Based on the Company’s analysis, the following PMPA was determined to be impaired: Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Cobalt Interests Voisey’s Bay $ 165,912 $ - $ 165,912 $ - Total impairment charges $ 165,912 $ - $ 165,912 $ - Voisey’s Bay - Indicator of Impairment at June 30, 2019 On June 11, 2018, the Company entered into an agreement (the “Voisey’s Bay PMPA”) to acquire from Vale an amount of cobalt equal to 42.4% of the cobalt production from its Voisey’s Bay mine, located in Canada, until the delivery of 31 million pounds of cobalt and 21.2% of cobalt production thereafter for the life of mine for a total upfront cash payment of $390 million. Concurrently, Vale also entered into a streaming agreement with Cobalt 27 Capital Corp. (“Cobalt 27”) on the Voisey’s Bay mine with similar terms and conditions to the Voisey’s Bay PMPA. On June 18, 2019, Cobalt 27 announced that it had entered into an agreement with Pala Investments Limited (“Pala”) whereby Pala would acquire 100% of Cobalt 27’s issued and outstanding common shares. The estimated implied price paid by Pala for Cobalt 27’s streaming agreement on the Voisey’s Bay mine was significantly lower than the original upfront cash payment paid by Cobalt 27 to Vale at the time their agreement was entered into. The implied purchase price paid by Pala to acquire Cobalt 27’s Voisey’s Bay stream was determined to be an indicator of impairment relative to the Company’s Voisey’s Bay PMPA. The Voisey’s Bay PMPA had a carrying value at June 30, 2019 of $393 million. Management estimated that the recoverable amount at June 30, 2019 under the Voisey’s Bay PMPA was $227 million, representing its FVLCD and resulting in an impairment charge of $166 million. The recoverable amount related to the Voisey’s Bay PMPA was estimated using an average discount rate of 7% and the market price of cobalt of $14.83 per pound. As this valuation technique requires the use of estimates and assumptions such as long-term commodity prices, discount rates, recoverable pounds of cobalt and operating performance, it is classified within Level 3 of the fair value hierarchy.

Early Deposit Mineral Stream In

Early Deposit Mineral Stream Interests	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Early Deposit Mineral Stream Interests	12. Early Deposit Mineral Stream Interests Early deposit mineral stream interests represent agreements relative to early stage development projects whereby Wheaton can choose not to proceed with the agreement once certain documentation has been received including, but not limited to, feasibility studies, environmental studies and impact assessment studies (please see Note 26 for more information). Once Wheaton has elected to proceed with the agreement, the carrying value of the stream will be transferred to Mineral Stream Interests. The following table summarizes the early deposit mineral stream interests currently owned by the Company: Attributable Production to be Purchased Early Deposit Mineral Stream Interests Mine Owner Location of Mine Upfront Consideration 1 Upfront Consideration to be Paid 1, 2 Total Upfront Consideration¹ Gold Silver Term of Agreement Toroparu Sandspring Guyana $ 15,500 $ 138,000 $ 153,500 10% 50% Life of Mine Cotabambas Panoro Peru 7,750 132,250 140,000 25% 3 100% 3 Life of Mine Kutcho Kutcho Canada 7,000 58,000 65,000 100% 4 100% 4 Life of Mine $ 30,250 $ 328,250 $ 358,500 1) Expressed in thousands of United States dollars; excludes closing costs and capitalized interest, where applicable. 2) Please refer to Note 26 for details of when the remaining upfront consideration to be paid becomes due. 3) Once 90 million silver equivalent ounces attributable to Wheaton have been produced, the attributable production to be purchased will decrease to 16.67% of gold production and 66.67% of silver production for the life of mine. 4) Once 51,000 ounces of gold and 5.6 million ounces of silver have been delivered to Wheaton, the stream will decrease to 66.67% of gold and silver production for the life of mine.

Mineral Royalty Interest

Mineral Royalty Interest	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Mineral Royalty Interest	13. Mineral Royalty Interest On August 7, 2014, the Company purchased a 1.5% net smelter return royalty interest (the “Royalty”) in the Metates properties located in Mexico from Chesapeake Gold Corp. (“Chesapeake”) for the life of mine. Under the terms of the agreement, the Company paid total upfront cash consideration of $9 million. In accordance with the terms of the Royalty, on August 7, 2019, Chesapeake exercised its option to re-acquire two-thirds To date, no revenue has been recognized and no depletion has been taken with respect to this royalty agreement.

Investment in Associate

Investment in Associate	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Investment in Associate	14. Investment in Associate Kutcho On June 6, 2019, the Company acquired 1 million common shares and warrants to acquire an additional 1 million common shares of Kutcho Copper Corp. (“Kutcho”) for Cdn$0.2 million, resulting in the Company owning 7,153,846 common shares and warrants to acquire an additional 4,076,923 common shares of Kutcho. Additionally, the Company holds a Cdn$20 million subordinated secured convertible term debt loan agreement bearing interest at 10% per annum with Kutcho (the “Kutcho Convertible Note” – see Note 15). As at June 30, 2019, Kutcho had 68,247,628 shares issued and outstanding, resulting in Wheaton owning approximately 10% of Kutcho on a non-diluted non-fully non-diluted Kutcho’s principal address is 1030 West Georgia Street, Suite 717, Vancouver, British Columbia, Canada, V6E 2Y3. Indicator of Impairment at June 30, 2019 Since the original investment in Kutcho on December 14, 2017, the value of Kutcho’s shares have had a significant decline in value. This decline in value was determined to be an indicator of impairment relative to the Company’s investment in Kutcho. The recoverable amount of the investment in Kutcho was calculated to be $1 million, which resulted in an impairment charge of $1.6 million. The recoverable amount, which represents Kutcho’s FVLCD, was calculated as the quoted market price of the common share multiplied by the quantity of shares held by the Company, and as such is classified within Level 1 of the fair value hierarchy. A continuity schedule of the Kutcho Investment in Associate from January 1, 2018 to June 30, 2019 is presented below: (in thousands) Investment in At January 1, 2018 $ 2,995 Share of losses (201) At June 30, 2018 $ 2,794 Share of losses (231) At December 31, 2018 $ 2,563 Share of losses (62) At March 31, 2019 $ 2,501 Amount invested 132 Impairment (1,649) At June 30, 2019 $ 984

Convertible Note Receivable

Convertible Note Receivable	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Convertible Note Receivable	15. Convertible Note Receivable Kutcho Effective December 14, 2017, in connection with the Kutcho Early Deposit Agreement, the Company advanced to Kutcho $16 million (Cdn$20 million) and received the Kutcho Convertible Note. The Kutcho Convertible Note, which has a seven year term to maturity, carries interest at 10% per annum, compounded and payable semi-annually. Kutcho has the option to defer the first three interest payments until December 31, 2019, at which point one half of the deferred interest is payable in cash and the other half of the deferred interest can, at Kutcho’s option, either (i) be paid in cash; or (ii) be deferred for an additional period not to exceed 4 years. In the event Kutcho elects to make the second deferral, Wheaton can, at its option, convert the remaining deferred interest into common shares of Kutcho. At any time prior to the maturity date, the Company has the right to convert all or any part of the outstanding amount of the Kutcho Convertible Note into common shares of Kutcho at Cdn$0.8125 per share. Once the Kutcho Convertible Note has been outstanding for 24 months, Kutcho has the right to repay the Kutcho Convertible Note early, subject to the applicable pre-payment ● 25% of the outstanding amount if pre-paid ● 20% of the outstanding amount if pre-paid ● 15% of the outstanding amount if pre-paid The Kutcho Convertible Note is revalued quarterly by discounting the stream of future interest and principal payments at the rate of interest prevailing at the balance sheet date for instruments of similar term and risk, and adding this value to the value of the convertibility feature which is estimated using a Black-Scholes model based on assumptions including risk free interest rate, expected dividend yield, expected volatility and expected remaining life of the Kutcho Convertible Note. A continuity schedule of the Kutcho Convertible Note from January 1, 2018 to June 30, 2019 is presented below: (in thousands) Convertible Note At January 1, 2018 $ 15,777 Fair value gain (loss) reflected in net earnings (1,388 ) At March 31, 2018 $ 14,389 Fair value gain (loss) reflected in net earnings 99 At June 30, 2018 $ 14,488 Fair value gain (loss) reflected in net earnings (1,589 ) At December 31, 2018 $ 12,899 Fair value gain (loss) reflected in net earnings 871 At March 31, 2019 $ 13,770 Fair value gain (loss) reflected in net earnings (1,934 ) At June 30, 2019 $ 11,836

Long-Term Equity Investments

Long-Term Equity Investments	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Long-Term Equity Investments	16. Long-Term Equity Investments (in thousands) June 30 December 31 Common shares held $ 216,319 $ 164,753 Warrants held 9 - Total long-term equity investments $ 216,328 $ 164,753 Common Shares Held Fair Value Adjustment Gains (Losses) Included in OCI (in thousands) Shares Owned Percentage Outstanding Fair Value at Jun 30, 2019 Three Months Jun 30, 2019 Six Months Ended Jun 30, 2019 Fair Value at Dec 31, 2018 Bear Creek 13,264,305 13% $ 16,825 $ 2,531 $ 6,713 $ 10,112 Sabina 11,700,000 4% 11,890 902 1,341 10,549 First Majestic 20,914,590 10% 165,434 27,816 42,247 123,187 Other 22,170 (1,223 ) 372 20,905 Total common shares held $ 216,319 $ 30,026 $ 50,673 $ 164,753 Fair Value Adjustment Gains (in thousands) Fair Value at Jun 30, 2018 Three Months Jun 30, 2018 Six Months Ended Jun 30, 2018 Bear Creek $ 17,829 $ (5,831) $ (3,528) Sabina 13,505 (831) (7,665) Arizona Mining 46,780 15,370 19,199 First Majestic 159,578 8,578 8,578 Other 23,467 (623) (3,050) Total common shares held $ 261,159 $ 16,663 $ 13,534 The Company’s long-term investments in common shares (“LTI’s”) are held for long-term strategic purposes and not for trading purposes. As such, the Company has elected to reflect any fair value adjustments, net of tax, as a component of other comprehensive income (“OCI”). The cumulative gain or loss will not be reclassified to net earnings on disposal of these long-term investments. While long-term investments in warrants are also held for long-term strategic purposes, they meet the definition of a derivative and therefore are classified as financial assets with fair value adjustments being recorded as a component of net earnings under the classification Other (Income) Expense. Warrants that do not have a quoted market price are valued using a Black-Scholes option pricing model. By holding these long-term investments, the Company is inherently exposed to various risk factors including currency risk, market price risk and liquidity risk.

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Property, Plant and Equipment	17. Property, Plant and Equipment June 30, 2019 (in thousands) Leasehold Right of Use Other Total Cost Balance - January 1, 2019 $ 4,378 $ - $ 3,318 $ 7,696 Additions upon adoption of IFRS 16 - 4,679 - 4,679 Additions 5 - 148 153 Disposals (7 ) - (29 ) (36 ) Balance - June 30, 2019 $ 4,376 $ 4,679 $ 3,437 $ 12,492 Accumulated Depreciation Balance - January 1, 2019 $ (2,024 ) $ - $ (2,046 ) $ (4,070 ) Disposals 7 - 29 36 Depreciation (252 ) (363 ) (222 ) (837 ) Balance - June 30, 2019 $ (2,269 ) $ (363 ) $ (2,240 ) $ (4,871 ) Net book value - June 30, 2019 $ 2,107 $ 4,316 $ 1,197 $ 7,621

Credit Facilities

Credit Facilities	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Credit Facilities	18. Credit Facilities 18.1. Bank Debt (in thousands) June 30 December 31 Current portion $ - $ - Long-term portion 1,095,500 1,264,000 Gross bank debt outstanding 1 $ 1,095,500 $ 1,264,000 1) There is $6 million unamortized debt issue costs associated with the Revolving Facility which have been recorded as a long-term asset under the classification Other (see Note 25). On February 27, 2019, the term of the Company’s $2 billion revolving term loan (“Revolving Facility”) was extended by an additional year, with the facility now maturing on February 27, 2024. The Company incurred fees of $1 million in relation to this extension. The Company’s Revolving Facility has financial covenants which require the Company to maintain: (i) a net debt to tangible net worth ratio of less than or equal to 0.75:1; and (ii) an interest coverage ratio of greater than or equal to 3.00:1. Only cash interest expenses are included for the purposes of calculating the interest coverage ratio. The Company is in compliance with these debt covenants as at June 30, 2019. At the Company’s option, amounts drawn under the Revolving Facility incur interest based on the Company’s leverage ratio at either (i) LIBOR plus 1.20% to 2.20%; or (ii) the Bank of Nova Scotia’s Base Rate plus 0.20% to 1.20%. Undrawn amounts under the Revolving Facility are subject to a stand-by The Revolving Facility, which is classified as a financial liability and reported at amortized cost using the effective interest method, can be drawn down at any time to finance acquisitions, investments or for general corporate purposes. 18.2. Letters of Guarantee On March 15, 2016, the Company entered into a letter of guarantee in favour of Her Majesty the Queen in Right of Canada, as represented by the Minister of National Revenue in the amount of Cdn$192 million. On March 15, 2017 and 2018, additional letters of guarantee in the amount of Cdn$11 million and Cdn$10 million, respectively, were delivered to the Canada Revenue Agency (“CRA”) as security for additional estimated interest for the respective following year. The letters of guarantee, which carried an annual fee of 100 basis points, were cancelled effective December 18, 2018. 18.3. Lease Liabilities The lease liability relative to the Company’s offices located in Vancouver, Canada and the Cayman Islands is as follows: (in thousands) June 30 December 31 Current portion $ 647 $ - Long-term portion 3,833 - Total lease liability $ 4,480 $ - The maturity analysis of these leases is as follows: (in thousands) June 30 Not later than 1 year $ 647 Later than 1 year and not later than 5 years 3,066 Later than 5 years 767 Total lease liability $ 4,480 18.4. Finance Costs A summary of the Company’s finance costs relative to the above facilities during the period is as follows: Three Months Ended June 30 Six Months Ended June 30 (in thousands) Note 2019 2018 2019 2018 Interest Expense During Period Average principle outstanding during period $ 1,165,994 $ 657,144 $ 1,195,591 $ 687,516 Average effective interest rate during period 18.1 4.25% 3.44% 4.27% 3.27% Total interest expense incurred during period $ 12,388 $ 5,659 $ 25,508 $ 11,249 Costs related to undrawn credit facilities 18.1 871 1,218 1,712 2,418 Interest expense - lease liabilities 18.3 47 - 78 - Letters of guarantee 18.2 - 490 (46) 807 Total finance costs $ 13,306 $ 7,367 $ 27,252 $ 14,474

Issued Capital

Issued Capital	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Issued Capital	19. Issued Capital (in thousands) Note June 30 December 31 Issued capital Share capital issued and outstanding: 446,265,488 common shares (December 31, 2018: 444,336,361 common shares) 19.1 $ 3,560,705 $ 3,516,437 19.1. Shares Issued The Company is authorized to issue an unlimited number of common shares having no par value and an unlimited number of preference shares issuable in series. As at June 30, 2019, the Company had no preference shares outstanding. A continuity schedule of the Company’s issued and outstanding common shares from January 1, 2018 to June 30, 2019 is presented below: Number of Shares Weighted Average Price At January 1, 2018 442,724,309 Restricted share units released 1 70,175 $0.00 At March 31, 2018 442,794,484 Share purchase options exercised 1 46,800 Cdn$24.28 Restricted share units released 1 185 Cdn$0.00 Dividend reinvestment plan 2 718,453 US$21.09 At June 30, 2018 443,559,922 Restricted share units released 1 33,818 US$0.00 Dividend reinvestment plan 2 742,621 US$15.56 At December 31, 2018 444,336,361 Share purchase options exercised 1 752,170 Cdn$26.55 Restricted share units released 1 130,730 $0.00 At March 31, 2019 445,219,261 Share purchase options exercised 1 283,620 Cdn$26.09 Restricted share units released 1 185 $0.00 Dividend reinvestment plan 2 762,422 US$21.89 At June 30, 2019 446,265,488 1) The weighted average price of share purchase options exercised and restricted share units released represents the respective exercise price. 2) The Company has implemented a dividend reinvestment plan (“DRIP”) whereby shareholders can elect to have dividends reinvested directly into additional Wheaton common shares. The weighted average price for common shares issued under the DRIP represents the volume weighted average price of the common shares on the five trading days preceding the dividend payment date, less a discount of 3%. 19.2. Dividends Declared Three Months Ended June 30 Six Months Ended June 30 2019 2018 2019 2018 Dividends declared per share $ 0.09 $ 0.09 $ 0.18 $ 0.18 Average number of shares eligible for dividend (000’s) 445,928 443,197 445,597 442,996 Total dividends paid $ 40,133 $ 39,888 $ 80,207 $ 79,739 Paid as follows: Cash $ 31,950 80% $ 32,480 81% $ 63,515 79% $ 64,589 81% DRIP 2 8,183 20% 7,408 19% 16,692 21% 15,150 19% Total dividends paid $ 40,133 100% $ 39,888 100% $ 80,207 100% $ 79,739 100% Shares issued under the DRIP 378,135 347,461 762,422 718,453 1) US dollars in thousands, except per share amounts. 2) The Company has implemented a dividend reinvestment plan (“DRIP”) whereby shareholders can elect to have dividends reinvested directly into additional Wheaton common shares at a discount of 3% of the Average Market Price, as defined in the DRIP. 3) As at June 30, 2019, cumulative dividends of $998 million have been declared and paid by the Company.

Reserves

Reserves	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Reserves	20. Reserves (in thousands) Note June 30 December 31 Reserves Share purchase warrants 20.1 $ 83,077 $ 83,077 Share purchase options 20.2 26,771 31,002 Restricted share units 20.3 4,843 5,970 Long-term investment revaluation reserve, net of tax 20.4 (63,484 ) (112,156 ) Total reserves $ 51,207 $ 7,893 20.1. Share Purchase Warrants The Company’s share purchase warrants (“warrants”) are presented below: Number of Weighted Exchange Share Warrants outstanding 10,000,000 $43.75 1.00 $ 83,077 The warrants, which expire on February 28, 2023, were valued using a Black-Scholes option pricing model. Each warrant entitles the holder the right to purchase one of the Company’s common shares. 20.2. Share Purchase Options The Company has established an equity settled share purchase option plan whereby the Company’s Board of Directors may, from time to time, grant options to employees or consultants. The maximum term of any share purchase option may be ten years, but generally options are granted with a term to expiry of five years. The exercise price of an option is not less than the closing price on the TSX on the last trading day preceding the grant date. The vesting period of the options is determined at the discretion of the Company’s Board of Directors at the time the options are granted, but generally vest over a period of two years. Each share purchase option converts into one common share of Wheaton on exercise. No amounts are paid or payable by the recipient on receipt of the option. The options do not carry rights to dividends or voting rights. Options may be exercised at any time from the date of vesting to the date of their expiry, subject to certain black-out The Company expenses the fair value of share purchase options that are expected to vest on a straight-line basis over the vesting period using the Black-Scholes option pricing model to estimate the fair value for each option at the date of grant. The Black-Scholes model was developed for use in estimating the fair value of traded options that have no vesting restrictions. The model requires the use of subjective assumptions, including expected share price volatility. Historical data has been considered in setting the assumptions. Expected volatility is determined by considering the trailing 30-month Three Months Ended June 30 Six Months Ended June 30 2019 2018 2019 2018 Black-Scholes weighted average assumptions Grant date share price and exercise price Cdn$29.79 Cdn$27.96 Cdn$32.88 Cdn$26.25 Expected dividend yield 1.60% 1.65% 1.49% 1.73% Expected volatility 30% 35% 31% 35% Risk-free interest rate 1.43% 2.37% 1.60% 1.91% Expected option life, in years 2.5 2.5 2.5 2.5 Weighted average fair value per option granted Cdn$5.29 Cdn$6.00 Cdn$6.10 Cdn$5.49 Number of options issued during the period 8,200 3,880 583,500 549,210 Total fair value of options issued (000’s) $ 32 $ 18 $ 2,652 $ 2,347 At June 30, 2019, there were 3,407,815 share purchase options outstanding with a weighted average exercise price of Cdn$26.52 per option. For the comparable period in 2018, there were 3,887,850 share purchase options outstanding with a weighted average exercise price of Cdn$25.58 per option. A continuity schedule of the Company’s outstanding share purchase options from January 1, 2018 to June 30, 2019 is presented below: Number of Options Outstanding Weighted Average Exercise Price At January 1, 2018 4,232,260 Cdn$ 26.71 Granted (fair value - $2 million or Cdn$5.49 per option) 545,330 26.24 Expired (829,000 ) 32.75 At March 31, 2018 3,948,590 Cdn$ 25.50 Granted (fair value - Cdn$6.00 per option) 3,880 27.96 Exercised (46,800 ) 24.28 Forfeited (2,820 ) 26.98 Expired (15,000 ) 30.19 At June 30, 2018 3,887,850 Cdn$ 25.58 Forfeited (4,500 ) 30.65 At December 31, 2018 3,883,350 Cdn$ 25.71 Granted (fair value - $3 million or Cdn$6.11 per option) 575,300 32.92 Exercised (752,170 ) 26.55 Forfeited (1,350 ) 26.85 At March 31, 2019 3,705,130 Cdn$ 26.58 Granted (fair value - Cdn$5.29 per option) 8,200 29.79 Exercised (283,620 ) 26.09 Forfeited (4,745 ) 30.78 Expired (17,150 ) 30.69 At June 30, 2019 3,407,815 Cdn$ 26.52 As it relates to share purchase options, during the three months ended June 30, 2019, the weighted average share price at the time of exercise was Cdn$27.42 per share (six months - Cdn$31.79 per share), as compared to Cdn$28.10 per share during the three months ended June 30, 2018. 20.3. Restricted Share Units (“RSUs”) The Company has established an RSU plan whereby RSUs will be issued to eligible employees or directors as determined by the Company’s Board of Directors or the Company’s Compensation Committee. RSUs give the holder the right to receive a specified number of common shares at the specified vesting date. RSUs generally vest over a period of two years. Compensation expense related to RSUs is recognized over the vesting period based upon the fair value of the Company’s common shares on the grant date and the awards that are expected to vest. The fair value is calculated with reference to the closing price of the Company’s common shares on the TSX on the business day prior to the date of grant. RSU holders receive a cash payment based on the dividends paid on the Company’s common shares in the event that the holder of a vested RSU has elected to defer the release of the RSU to a future date. This cash payment is reflected as a component of net earnings under the classification General and Administrative. A continuity schedule of the Company’s restricted share units outstanding from January 1, 2018 to June 30, 2019 is presented below: Number of RSUs Outstanding Weighted Average Intrinsic Value At January 1, 2018 313,846 $ 20.71 Granted (fair value - $3 million) 160,270 20.41 Released (70,175 ) 20.98 At March 31, 2018 403,941 $ 20.54 Granted 790 21.89 Released (185 ) 20.44 Forfeited (595 ) 20.48 At June 30, 2018 403,951 $ 20.54 Released (33,818 ) 22.54 At December 31, 2018 370,133 $ 20.36 Granted (fair value - $3 million) 131,210 24.53 Released (130,730 ) 20.85 Forfeited (280 ) 20.51 At March 31, 2019 370,333 $ 21.66 Granted 1,400 22.12 Released (185 ) 20.44 Forfeited (830 ) 23.00 At June 30, 2019 370,718 $ 21.66 During the three months ended June 30, 2019, the Company issued 1,400 RSUs with a fair value of Cdn$29.68 per RSU (six months - 132,610 RSUs with a fair value of $3 million or Cdn$32.89 per RSU). For the same period in 2018, the Company issued 790 RSUs with a fair value of Cdn$27.96 per RSU (six months - 161,060 RSUs with a fair value of $3 million or Cdn$26.25 per RSU). As of June 30, 2019, there were 370,718 RSUs outstanding. For the comparable period in 2018, there were 403,951 RSUs outstanding. 20.4. Long-Term Investment Revaluation Reserve The Company’s long-term investments in common shares (Note 16) are held for long-term strategic purposes and not for trading purposes. Upon the application of IFRS 9, Financial Instruments, the Company has chosen to designate these long-term investments in common shares as financial assets with fair value adjustments being recorded as a component of OCI as it believes that this provides a more meaningful presentation for long-term strategic investments, rather than reflecting changes in fair value as a component of net earnings. As some of these long-term investments are denominated in Canadian dollars, changes in their fair value is affected by both the change in share price in addition to changes in the Cdn$/US$ exchange rate. Where the fair value of a long-term investment in common shares held exceeds its tax cost, the Company recognizes a deferred income tax liability. To the extent that the value of the long-term investment subsequently declines, the deferred income tax liability is reduced. However, where the fair value of the long-term investment decreases below the tax cost, the Company does not recognize a deferred income tax asset on the unrealized capital loss unless it is probable that the Company will generate future capital gains to offset the loss. A continuity schedule of the Company’s long-term investment revaluation reserve from January 1, 2018 to June 30, 2019 is presented below: (in thousands) Change in Deferred Total At January 1, 2018 $ (38,111) $ (1,936) $ (40,047) Unrealized gain (loss) on LTIs 1 (3,128) (458) (3,586) At March 31, 2018 $ (41,239) $ (2,394) $ (43,633) Unrealized gain (loss) on LTIs 1 16,663 (3,233) 13,430 At June 30, 2018 $ (24,576) $ (5,627) $ (30,203) Unrealized gain (loss) on LTIs 1 (53,520) 1,029 (52,491) Reallocate reserve to retained earnings upon disposal of LTIs 1 (34,060) 4,598 (29,462) At December 31, 2018 $ (112,156) $ - $ (112,156) Unrealized gain (loss) on LTIs 1 20,647 (45) 20,602 At March 31, 2019 $ (91,509) $ (45) $ (91,554) Unrealized gain (loss) on LTIs 1 30,026 (1,956) 28,070 At June 30, 2019 $ (61,483) $ (2,001) $ (63,484) 1) LTIs refers to long-term investments in common shares held.

Stock Based Compensation

Stock Based Compensation	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Stock Based Compensation	21. Stock Based Compensation The Company’s stock based compensation consists of share purchase options (Note 20.2), restricted share units (Note 20.3) and performance share units (Note 21.1). The accrued value of share purchase options and restricted share units are reflected as reserves in the shareholder’s equity section of the Company’s balance sheet while the accrued value associated with performance share units is reflected as an accrued liability. 21.1. Performance Share Units (“PSUs”) The Company has established a Performance Share Unit Plan (“the PSU plan”) whereby PSUs will be issued to eligible employees as determined by the Company’s Board of Directors or the Company’s Compensation Committee. PSUs issued under the PSU plan entitle the holder to a cash payment at the end of a three year performance period equal to the number of PSUs granted, multiplied by a performance factor and multiplied by the fair market value of a Wheaton common share on the expiry of the performance period. The performance factor can range from 0% to 200% and is determined by comparing the Company’s total shareholder return to those achieved by various peer companies, the Philadelphia Gold and Silver Index and the price of gold and silver. Compensation expense for the PSUs is recorded on a straight-line basis over the three year vesting period. The amount of compensation expense is adjusted at the end of each reporting period to reflect (i) the fair value of common shares; (ii) the number of PSUs anticipated to vest; and (iii) the anticipated performance factor. During the three months ended June 30, 2019, the Company issued 2,850 PSUs (six months - 191,410 PSUs). For the comparable period of the previous year, the Company issued 1,590 PSUs (six months - 220,260 PSUs). A continuity schedule of the Company’s outstanding PSUs (assuming a performance factor of 100% is achieved over the performance period) and the Company’s PSU accrual from January 1, 2018 to June 30, 2019 is presented below: Number of Outstanding PSU accrual At January 1, 2018 656,599 $ 1,430 Granted 218,670 - Accrual related to the fair value of the PSUs outstanding - 184 Foreign exchange adjustment - (32) Paid 1 (218,615) - At March 31, 2018 656,654 $ 1,582 Granted 1,590 - Accrual related to the fair value of the PSUs outstanding - 3,316 Foreign exchange adjustment - (21) Forfeited (2,517) (6) At June 30, 2018 655,727 $ 4,871 Accrual related to the fair value of the PSUs outstanding - 6,018 Foreign exchange adjustment - (132) At December 31, 2018 655,727 10,757 Granted 188,560 - Accrual related to the fair value of the PSUs outstanding - 7,124 Foreign exchange adjustment - 185 Paid (189,214) (7,701) Forfeited (616) (15) At March 31, 2019 654,457 10,350 Granted 2,850 - Accrual related to the fair value of the PSUs outstanding - 2,417 Foreign exchange adjustment - 148 Paid (39,836) (1,624) Forfeited (7,629) - At June 30, 2019 609,842 $ 11,291 1) The PSUs paid out during 2018 had a performance factor of 0% resulting in a cash disbursement of $Nil. A summary of the PSUs outstanding at June 30, 2019 is as follows: Year of Grant Year of Maturity Number outstanding Estimated Anticipated Percent of June 30, 2019 PSU Liability at June 30, 2019 2017 2020 204,142 $23.98 197% 75% $ 7,214 2018 2021 216,440 $23.98 168% 42% 3,665 2019 2022 189,260 $23.98 106% 9% 412 609,842 $ 11,291

Earnings per Share ("EPS") and

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS")	6 Months Ended
	Jun. 30, 2019
Profit or loss [abstract]
Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS")	22. Earnings per Share (“EPS”) and Diluted Earnings per Share (“Diluted EPS”) Diluted earnings per share is calculated using the treasury method which assumes that outstanding share purchase options and warrants, with exercise prices that are lower than the average market price of the Company’s common shares for the relevant period, are exercised and the proceeds are used to purchase shares of the Company at the average market price of the common shares for the relevant period. Diluted EPS is calculated based on the following weighted average number of shares outstanding: Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Basic weighted average number of shares outstanding 445,769 443,191 445,083 442,961 Effect of dilutive securities Share purchase options 444 175 422 131 Restricted share units 257 404 310 361 Diluted weighted average number of shares outstanding 446,470 443,770 445,815 443,453 The following table lists the number of share purchase options and share purchase warrants excluded from the computation of diluted earnings per share because the exercise prices exceeded the average market value of the common shares of Cdn$29.68 (six months - Cdn$28.96), compared to Cdn$27.76 (six months - Cdn$26.89) for the comparable period in 2018. Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Share purchase options 599 827 599 1,983 Share purchase warrants 10,000 10,000 10,000 10,000 Total 10,599 10,827 10,599 11,983

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Supplemental Cash Flow Information	23. Supplemental Cash Flow Information Change in Non-Cash Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Change in non-cash Accounts receivable $ 559 $ (4,663 ) $ 867 $ (3,784 ) Accounts payable and accrued liabilities 5,274 4,975 (2,267 ) 817 Other (1,174 ) (2,084 ) (1,111 ) (1,880 ) Total change in non-cash $ 4,659 $ (1,772 ) $ (2,511 ) $ (4,847 ) Cash Outflow Relative to Leases During the six months ended June 30, 2019, the total cash outflows relative to the Company’s leases was $300,000. Non-Cash As more fully described in note 10, during 2018 the company received 20,914,590 First Majestic common shares with a fair value of $151 million as partial consideration for the termination of the previously owned San Dimas SPA. Non-Cash As more fully described in Note 19.2, during the six months ended June 30, 2019, the Company declared and paid dividends to its shareholders in the amount of $0.18 per common share for total dividends of $80 million. Approximately 21% of shareholders elected to have their dividends reinvested in common shares of the Company under the Company’s dividend reinvestment plan (“DRIP”). As a result, $63 million of dividend payments were made in cash and $17 million in common shares issued. For the comparable period in 2018, the Company declared and paid dividends to its shareholders in the amount of $0.18 per common share for total dividends of $80 million, with the payment being comprised of $65 million in cash and $15 million in common shares issued.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Income Taxes	24. Income Taxes A summary of the Company’s income tax expense (recovery) is as follows: Income tax recognized in net earnings is comprised of the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Current income tax expense $ 85 $ 29 $ 104 $ 51 Deferred income tax expense (recovery) related to: Origination and reversal of temporary differences $ 1,089 $ 845 $ 4,284 $ 1,891 Reversal of write down or recognition of prior period temporary differences (3,932 ) (4,098 ) (7,256 ) (5,651 ) Total deferred income tax expense (recovery) $ (2,843 ) $ (3,253 ) $ (2,972 ) $ (3,760 ) Income tax expense (recovery) recognized in net earnings $ (2,758 ) $ (3,224 ) $ (2,868 ) $ (3,709 ) Income tax recognized as a component of OCI is comprised of the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Income tax expense (recovery) related to LTIs - common shares held $ 1,956 $ 3,233 $ 2,001 $ 3,691 Income tax expense (recovery) recognized in OCI $ 1,956 $ 3,233 $ 2,001 $ 3,691 Income tax recognized directly in equity is comprised of the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Income tax expense (recovery) related to share issue costs Write down of previously recognized temporary differences $ 894 $ 30 $ 986 $ 89 Income tax expense (recovery) recognized in equity $ 894 $ 30 $ 986 $ 89 The provision for income taxes differs from the amount that would be obtained by applying the statutory income tax rate to consolidated earnings before income taxes due to the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Earnings (loss) before income taxes $ (127,452) $ 314,918 $ (70,213) $ 382,556 Canadian federal and provincial income tax rates 27.00% 27.00% 27.00% 27.00% Income tax expense (recovery) based on above rates $ (34,413) $ 85,028 $ (18,958) $ 103,290 Non-deductible 1,225 1,128 1,795 1,915 Differences in tax rates in foreign jurisdictions (14,866) (86,764) (33,761) (106,925) Current period unrecognized temporary differences - impairments 44,796 - 44,796 - Current period unrecognized temporary differences 4,432 1,482 10,516 3,662 Reversal of write down or recognition of prior period temporary differences (3,932) (4,098) (7,256) (5,651) Income tax expense (recovery) $ (2,758) $ (3,224) $ (2,868) $ (3,709) The majority of the Company’s income generating activities, including the sale of precious metals, is conducted by its 100% owned subsidiary Wheaton Precious Metals International Ltd., which operates in the Cayman Islands and is not subject to income tax. The recognized deferred income tax assets and liabilities are offset on the balance sheet and relate to Canada, except for the foreign withholding tax. The movement in deferred income tax assets and liabilities for the six months ended June 30, 2019 and the year ended December 31, 2018 is shown below: Six Months Ended June 30, 2019 Recognized deferred income tax assets and liabilities Opening Recovery Recovery Recovery Closing Balance Deferred tax assets Non-capital 1 $ 3,823 $ 1,002 $ - $ (936) $ 3,889 Capital loss carryforward 2 - 2,001 - - 2,001 Other 3 387 45 - - 432 Deferred tax liabilities Interest capitalized for accounting (87) - - - (87) Debt and share financing fees 4 (591) (61) - (50) (702) Unrealized gains on long-term investments - - (2,001) - (2,001) Mineral stream interests 5 (3,532) - - - (3,532) Foreign withholding tax (111) (14) - - (125) Total $ (111) $ 2,973 $ (2,001) $ (986) $ (125) 1) As at June 30, 2019, the Company had recognized the tax effect on $14 million of non-capital 2) As at June 30, 2019, the Company had recognized net capital losses of $7 million to offset unrealized taxable capital gains on long-term investments. 3) Other includes capital assets, charitable donation carryforward, and PSU accrual. 4) Debt and share financing fees are deducted over a five year period for Canadian income tax purposes. For accounting purposes, debt financing fees are deducted over the term of the credit facility and share financing fees are charged directly to issued capital. 5) The Company’s position, as reflected in its filed Canadian income tax returns and consistent with the terms of the PMPAs, is that the cost of the precious metal acquired under the Canadian PMPAs is equal to the market value while a deposit is outstanding (where applicable to an agreement), and the cash cost thereafter. For accounting purposes, the cost of the mineral stream interests is depleted on a unit-of-production Year Ended December 31, 2018 Recognized deferred income tax assets and liabilities Opening Recovery LTI Recovery Recovery Closing Balance Deferred tax assets Non-capital $ 3,848 $ (2,057) $ $ - $ 2,032 $ 3,823 Long-term investments - - - - - Capital loss carryforward 1,965 2,633 (4,598) - - - Foreign exchange on investments - - - - - Other 147 240 - - 387 Deferred tax liabilities Interest capitalized for accounting (87) - - - (87) Debt and share financing fees (375) (107) - (109) (591) Kutcho Convertible Note (29) 29 - - - Unrealized gains on long-term investments (1,937) 1 4,598 (2,662) - - Mineral stream interests (3,532) - - - (3,532) Foreign withholding tax (76) (35) - - (111) Total $ (76) $ 704 $ - $ (2,662) $ 1,923 $ (111) Deferred income tax assets in Canada not recognized are shown below: (in thousands) June 30 2019 December 31 2018 Non-capital 1 $ 17,544 $ 7,209 Debt and equity financing fees 2,978 4,474 Mineral stream interests 110,750 67,717 Other 2,647 3,656 Capital loss carryforward 2 5,796 7,723 Kutcho Convertible Note 829 648 Unrealized losses on long-term investments 11,068 15,907 Total $ 151,612 $ 107,334 1) As at June 30, 2019, the Company had not recognized the tax effect on $65 million of non-capital 2) As at June 30, 2019, the Company had not recognized the tax effect on $21 million of net capital losses as a deferred tax asset. In June 2019, the Company received Notices of Reassessment for the 2005 to 2017 taxation years relating to the settlement reached with the Canada Revenue Agency (“CRA”) on December 13, 2018 (the “Settlement Agreement”). These reassessments resulted in total tax of approximately $4.3 million (Cdn$5.6 million) and interest and other penalties of approximately $4.4 million (Cdn$5.7 million), consistent with the amounts accrued in the Company’s results for the year ended December 31, 2018. The Company believes the interest should be lower by approximately $1.4 million (Cdn$1.9 million) and expects to file notices of objection to challenge the CRA’s computation of interest. The 2011 to 2015 taxation years remain under audit for international transactions, subject to the terms of the Settlement Agreement.

Other Long-Term Assets

Other Long-Term Assets	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Other Long-Term Assets	25. Other Long-Term Assets The composition of other long-term assets are shown below: (in thousands) Note June 30 December 31 Intangible assets $ 4,203 $ 3,291 Debt issue costs - Revolving Facility 18.1 5,883 5,507 Other 1,447 1,517 Total other long-term assets $ 11,533 $ 10,315

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Commitments and Contingencies	26. Commitments and Contingencies Mineral Stream Interests The following table summarizes the Company’s commitments to make per-ounce Mineral Stream Interests Attributable Payable Production to be Per Unit of Measurement Cash Payment 1, 2 Term of Agreement Date of Original Contract Gold Silver Palladium Cobalt Gold Silver Palladium Cobalt Peñasquito 0% 25% 0% 0% n/a $ 4.21 n/a n/a Life of Mine 24-Jul-07 Constancia 50% 3 100% 0% 0% $ 400 4 $ 5.90 4 n/a n/a Life of Mine 8-Aug-12 Salobo 75% 0% 0% 0% $ 404 n/a n/a n/a Life of Mine 28-Feb-13 Sudbury 70% 0% 0% 0% $ 400 n/a n/a n/a 20 years 28-Feb-13 Antamina 0% 33.75% 0% 0% n/a variable 5 n/a n/a Life of Mine 3-Nov-15 San Dimas variable 6 0% 6 0% 0% $ 600 n/a n/a n/a Life of Mine 10-May-18 Stillwater 100% 0% 4.5% 7 0% variable 8 n/a variable 8 n/a Life of Mine 16-Jul-18 Voisey’s Bay 0% 0% 0% 42.4% 9 n/a n/a n/a variable 10 Life of Mine 11-Jun-18 Other Los Filos 0% 100% 0% 0% n/a $ 4.39 n/a n/a 25 years 15-Oct-04 Zinkgruvan 0% 100% 0% 0% n/a $ 4.39 n/a n/a Life of Mine 8-Dec-04 Yauliyacu 0% 100% 11 0% 0% n/a $ 8.89 12 n/a n/a Life of Mine 23-Mar-06 Stratoni 0% 100% 0% 0% n/a $ 9.31 13 n/a n/a Life of Mine 23-Apr-07 Neves-Corvo 0% 100% 0% 0% n/a $ 4.30 n/a n/a 50 years 5-Jun-07 Aljustrel 0% 100% 14 0% 0% n/a variable 15 n/a n/a 50 years 5-Jun-07 Minto 100% 16 100% 16 0% 0% $ 325 17 $ 4.22 n/a n/a Life of Mine 20-Nov-08 Keno Hill 0% 25% 0% 0% n/a variable 18 n/a n/a Life of Mine 2-Oct-08 Pascua-Lama 0% 25% 0% 0% n/a $ 3.90 n/a n/a Life of Mine 8-Sep-09 Rosemont 100% 100% 0% 0% $ 450 $ 3.90 n/a n/a Life of Mine 10-Feb-10 Loma de La Plata 0% 12.5% 0% 0% n/a $ 4.00 n/a n/a Life of Mine n/a 19 777 50% 100% 0% 0% $ 416 4 $ 6.14 4 n/a n/a Life of Mine 8-Aug-12 Early Deposit Toroparu 10% 50% 0% 0% $ 400 $ 3.90 n/a n/a Life of Mine 11-Nov-13 Cotabambas 25% 20 100% 20 0% 0% $ 450 $ 5.90 n/a n/a Life of Mine 21-Mar-16 Kutcho 100% 21 100% 21 0% 0% variable 22 variable 22 n/a n/a Life of Mine 12-Dec-17 1) Subject to an annual inflationary adjustment with the exception of Loma de La Plata and Sudbury. 2) All amounts are measured on a per ounce basis with the exception of cobalt which is measured on a per pound basis. Should the prevailing market price for the applicable metal be lower than this amount, the per ounce or per pound cash payment will be reduced to the prevailing market price, with the exception of Yauliyacu where the per ounce cash payment will not be reduced below $4.35 per ounce, subject to an annual inflationary factor. 3) Gold recoveries will be set at 55% for the Constancia deposit and 70% for the Pampacancha deposit until 265,000 ounces of gold have been delivered to the Company. 4) Subject to an increase to $9.90 per ounce of silver and $550 per ounce of gold after the initial 40-year 5) The Company is committed to pay Glencore 20% of the spot price of silver for each ounce of silver delivered under the Antamina PMPA. 6) Under the terms of the San Dimas PMPA, the Company is entitled to an amount equal to 25% of the payable gold production plus an additional amount of gold equal to 25% of the payable silver production converted to gold at a fixed gold to silver exchange ratio of 70:1 from the San Dimas mine. If the average gold to silver price ratio decreases to less than 50:1 or increases to more than 90:1 for a period of 6 months or more, then the “70” shall be revised to “50” or “90”, as the case may be, until such time as the average gold to silver price ratio is between 50:1 to 90:1 for a period of 6 months or more in which event the “70” shall be reinstated. 7) The Company is committed to purchase 4.5% of Stillwater palladium production until 375,000 ounces are delivered to the Company, thereafter 2.25% of Stillwater palladium production until 550,000 ounces are delivered to the Company and 1% of Stillwater palladium production thereafter for the life of mine. 8) The Company is committed to pay Sibanye 18% of the spot price of gold and palladium for each ounce of gold and palladium delivered under the Stillwater mines PMPA until the market value of gold and palladium delivered to Wheaton, net of the per ounce cash payment, exceeds the initial upfront cash deposit, and 22% of the spot price thereafter. 9) Once the Company has received 31 million pounds of cobalt, the Company’s attributable cobalt production to be purchased will be reduced to 21.2%. 10) The Company is committed to pay Vale 18% of the spot price of cobalt per pound of cobalt delivered under the agreement until the market value of cobalt delivered to Wheaton, net of the per pound cash payment, exceeds the initial upfront cash deposit, and 22% of the spot price thereafter. 11) Wheaton is committed to purchase from Glencore a per annum amount equal to the first 1.5 million ounces of payable silver produced at Yauliyacu and 50% of any excess. 12) Should the market price of silver exceed $20 per ounce, in addition to the $8.89 per ounce, the Company is committed to pay Glencore an additional amount for each ounce of silver delivered equal to 50% of the excess, to a maximum of $10 per ounce, such that when the market price of silver is $40 or above, the Company will pay Glencore $18.89 per ounce of silver delivered. 13) In October 2015, in order to incentivize additional exploration and potentially extend the limited remaining mine life of Stratoni, Wheaton and Eldorado Gold agreed to modify the Stratoni PMPA. The primary modification is to increase the production price per ounce of silver delivered to Wheaton over the current fixed price by one of the following amounts: (i) $2.50 per ounce of silver delivered if 10,000 meters of drilling is completed outside of the existing ore body and within Wheaton’s defined area of interest (“Expansion Drilling”); (ii) $5.00 per ounce of silver delivered if 20,000 meters of Expansion Drilling is completed; and (iii) $7.00 per ounce of silver delivered if 30,000 meters of Expansion Drilling is completed. Drilling in all three cases must be completed by December 31, 2020, in order for the agreed upon increase in production price to be initiated. The figures in the above table reflect the fact that Eldorado completed 20,000 meters of Expansion Drilling in June 2019. 14) Wheaton only has the rights to silver contained in concentrate containing less than 15% copper at the Aljustrel mine. 15) In respect of the Aljustrel PMPA, the Company is committed to pay Almina 50% of the amount received under the respective concentrate sales contracts. 16) The Company is committed to acquire 100% of the first 30,000 ounces of gold produced per annum and 50% thereafter. The Minto mine was placed into care and maintenance in October 2018. 17) The production payment per ounce of gold delivered to Wheaton is to be increased over the current fixed price in periods where the market price of copper is lower than $2.50 per pound. 18) The production payment related to the Keno Hill silver interest is a function of the silver head grade and silver spot price in the month in which the silver is produced. 19) Terms of the agreement not yet finalized. 20) Once 90 million silver equivalent ounces attributable to Wheaton have been produced, the attributable production to be purchased will decrease to 66.67% of silver production and 16.67% of gold production for the life of mine. 21) Once 51,000 ounces of gold and 5.6 million ounces of silver have been delivered to Wheaton, the stream will decrease to 66.67% of gold and silver production for the life of mine. 22) The Company is committed to pay Kutcho 20% of the spot price of gold and silver for each ounce of gold and silver delivered under the Kutcho Early Deposit Agreement. Other Contractual Obligations and Contingencies Obligations With Scheduled Payment Dates (in thousands) 2019 2020 - 2022 2023 - 2024 After 2024 Sub-Total Other Total Bank debt 1 $ - $ - $ 1,095,500 $ - $ 1,095,500 $ - $ 1,095,500 Interest 2 23,147 96,947 39,922 - 160,016 - 160,016 Payments for mineral stream interest 3 Rosemont 4 - - - - - 231,150 231,150 Loma de La Plata - - - - - 32,400 32,400 Payments for early deposit mineral stream interest Toroparu - - - - - 138,000 138,000 Cotabambas 750 4,500 1,000 - 6,250 126,000 132,250 Kutcho - - - - - 58,000 58,000 Operating leases 406 1,764 1,122 234 3,526 - 3,526 Total contractual obligations $ 24,303 $ 103,211 $ 1,137,544 $ 234 $ 1,265,292 $ 585,550 $ 1,850,842 1) At June 30, 2019, the Company had $1.1 billion drawn and outstanding on the Revolving Facility. 2) As the applicable interest rates are floating in nature, the interest charges are estimated based on market-based forward interest rate curves at the end of the reporting period combined with the assumption that the principal balance outstanding at June 30, 2019 does not change until the debt maturity date. 3) Does not reflect the contingent payment due related to the Salobo gold purchase agreement (see the Salobo section on the following page). 4) Includes contingent transaction costs of $1 million. Rosemont Effective February 8, 2019, the Company amended the Rosemont PMPA. In connection with the amended Rosemont PMPA, the Company is committed to pay Hudbay total upfront cash payments of $230 million in two installments, with the first $50 million being advanced upon Hudbay’s receipt of permitting for the Rosemont project and other customary conditions and the balance of $180 million being advanced once project costs incurred on the Rosemont project exceed $98 million. Under the amendment, the Company is now permitted to elect to pay the deposit in cash or the delivery of common shares and Hudbay has provided a corporate guarantee. Additionally, the Company will be entitled to certain delay payments, including where construction ceases in any material respect, or if completion is not achieved within agreed upon timelines. On August 1, 2019, Hudbay announced that the U.S. District Court for the District of Arizona (“Court”) issued a ruling in the lawsuits challenging the U.S. Forest Service’s issuance of the Final Record of Decision (“FROD”) for the Rosemont project in Arizona. The Court ruled to vacate and remand the FROD such that Rosemont cannot proceed with construction at this time. Hudbay states that they will be appealing the Court’s decision to the U.S. Ninth Circuit Court of Appeals. Loma de La Plata In connection with the Loma de La Plata PMPA, the Company is committed to pay Pan American Silver Corp. (“Pan American”) total upfront cash payments of $32 million following the satisfaction of certain conditions, including Pan American receiving all necessary permits to proceed with the mine construction. Toroparu In connection with the Toroparu Early Deposit Agreement, the Company is committed to pay Sandspring an additional $138 million, payable on an installment basis to partially fund construction of the mine. Following the delivery of certain feasibility documentation or after December 31, 2019 if the feasibility documentation has not been delivered to Wheaton by such date, Wheaton may elect not to proceed with the agreement or not pay the balance of the upfront consideration and reduce the gold stream percentage from 10% to 0.909% and the silver stream percentage from 50% to nil. If Wheaton elects to terminate, Wheaton will be entitled to a return of the amounts advanced less $2 million which is non-refundable non-refundable. re-scoping Cotabambas In connection with the Cotabambas Early Deposit Agreement, the Company is committed to pay Panoro a total cash consideration of $140 million, of which $8 million has been paid to date. Once certain conditions have been met, the Company will advance an additional $6 million to Panoro, spread over up to five years. Following the delivery of a bankable definitive feasibility study, environmental study and impact assessment, and other related documents (collectively, the “Cotabambas Feasibility Documentation”), and receipt of permits and construction commencing, the Company may then advance the remaining deposit or elect to terminate the Cotabambas Early Deposit Agreement. If the Company elects to terminate, the Company will be entitled to a return of the portion of the amounts advanced less $2 million payable upon certain triggering events occurring. Until January 1, 2020, Panoro has a one-time Kutcho In connection with the Kutcho Early Deposit Agreement, the Company is committed to pay Kutcho a total cash consideration of $65 million, of which $7 million has been paid to date. The remaining $58 million will be advanced on an installment basis to partially fund construction of the mine once certain conditions have been satisfied. The Company will be required to make an additional payment to Kutcho, of up to $20 million, if processing throughput is increased to 4,500 tonnes per day or more within 5 years of attaining commercial production. Salobo The Salobo mine currently has a mill throughput capacity of 24 million tonnes per annum (“Mtpa”). In October 2018, Vale’s Board of Directors approved the investment in the Salobo III mine expansion (the “Salobo Expansion”). The Salobo Expansion is proposed to include a third concentrator line and will use Salobo’s existing infrastructure. Vale anticipates that the Salobo Expansion, which is scheduled to start up in the first half of 2022 with a ramp-up If actual throughput is expanded above 28 Mtpa, then under the terms of the Salobo PMPA, Wheaton will be required to make an additional set payment to Vale based on the size of the expansion, the timing of completion and the grade of the material processed. The set payment ranges from $113 million if throughput is expanded beyond 28 Mtpa by January 1, 2036 up to $953 million if throughput is expanded beyond 40 Mtpa by January 1, 2021. Based on Vale’s estimated size and timing of the Salobo Expansion, the Company estimates that an expansion payment of between $550 million to $650 million would be payable. Given Vale’s proposed schedule, this payment would likely become payable in 2023 though the actual amount and timing of the expansion payment may significantly differ from this estimate. Canada Revenue Agency – Canada Revenue Agency – 2013-2015 Taxation Years - Domestic Reassessments On July 24, 2018, the Company received a Notice of Reassessment for the 2013 taxation year (the “2013 Domestic Reassessment”) in which the CRA is seeking to change the timing of the deduction of upfront payments with respect to the Company’s PMPAs in respect of Canadian mining assets, so that the cost of precious metal acquired under these Canadian PMPAs is equal to the cash cost paid on delivery plus an amortized amount of the upfront payment determined on a units-of-production The Company’s position, as reflected in its Canadian income tax returns and consistent with the terms of the PMPAs, is that the cost of the precious metal acquired under the Canadian PMPAs is equal to the market value while a deposit is outstanding, and the cash cost thereafter. Management believes the Company’s position is correct and that it has filed its tax returns and paid applicable taxes in compliance with Canadian tax law. The Company previously filed a notice of objection in respect of the 2013 Domestic Reassessment and intends to file notices of objection in respect of the 2014 and 2015 Domestic Reassessments. If CRA were to apply the methodology in the Domestic Reassessments to the 2016 to 2018 taxation years, the Company estimates that losses would arise in the 2016 to 2018 taxation years that could be carried back to reduce tax and interest relating to the Domestic Reassessments by approximately $5 million such that the total tax, interest and other penalties relating to the Domestic Reassessments for the years 2013 through 2015 would be approximately $2 million. The 2016 to 2018 taxation years remain open to a domestic audit. U.S. Shareholder Class Action During July 2015, after the Company disclosed that the CRA was proposing that they would issue the Reassessments, two putative securities class action lawsuits were filed against the Company in the U.S. District Court for the Central District of California in connection with the proposal (the “Complaints”). On October 19, 2015, the Complaints were consolidated into one action, In re Silver Wheaton Securities Litigation At a hearing on June 6, 2016, the Court denied the Defendants’ motion to dismiss. A denial of such a motion is not a ruling on the merits of the claims in the lawsuit. Certification of the class was granted by the Court on May 11, 2017. On March 27, 2018, the court granted Plaintiff’s motion for leave to file a Second Amended Complaint, which adds a claim under Section 10(b) against our auditors. Defendants filed motions to dismiss the Second Amended Complaint, however on March 29, 2019 the court issued a ruling denying the motion to dismiss as against both defendants and our auditors. No trial date is currently set for this matter. The Company believes the allegations are without merit and intends to vigorously defend against this matter. No amounts have been recorded for any potential liability arising from this matter, as the original Complaints do not specify a quantum of damages and the Company cannot reasonably predict the outcome. Canadian Shareholder Class Action By Notice of Action dated August 10, 2016 (as amended September 2, 2016), proposed representative plaintiff Suzan Poirier commenced proceedings pursuant to the Class Proceedings Act (Ontario) in the Ontario Superior Court of Justice against Wheaton Precious Metals Corp., Randy Smallwood, President and Chief Executive Officer and Gary Brown, Senior Vice President & Chief Financial Officer. The statement of claim filed alleges, among other things, misrepresentation pursuant to primary and secondary market civil liability provisions under the Securities Act (Ontario), common law negligence and negligent misrepresentation. The claim focuses on the Reassessments. The statement of claim purports to be brought on behalf of persons who (i) acquired Wheaton common shares in Wheaton’s March 2015 public offering, and (ii) acquired Wheaton common shares in the secondary market, other than in the United States, during an alleged class period of August 14, 2013 to July 6, 2015 inclusive. The Company believes that the allegations are without merit and intends to vigorously defend against this matter. No amounts have been recorded for potential liability arising from this claim as no value has been specified in the statement of claim and the Company cannot reasonably predict the outcome. Other Due to the size, complexity and nature of the Company’s operations, various legal and tax matters are outstanding from time to time, including audits. By their nature, contingencies will only be resolved when one or more future events occur or fail to occur. The assessment of contingencies inherently involves the exercise of significant judgment and estimates of the outcome of future events. If the Company is unable to resolve any of these matters favorably, there may be a material adverse impact on the Company’s financial performance, cash flows or results of operations. In the event that management’s estimate of the future resolution of these matters changes, the Company will recognize the effects of the changes in its consolidated financial statements in the appropriate period relative to when such changes occur.

Segmented Information

Segmented Information	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Segmented Information	27. Segmented Information Operating Segments The Company’s reportable operating segments, which are the components of the Company’s business where separate financial information is available and which are evaluated on a regular basis by the Company’s Chief Executive Officer (“CEO”), who is the Company’s chief operating decision maker, for the purpose of assessing performance, are summarized in the tables below: Three Months Ended June 30, 2019 (in thousands) Sales Cost of Sales Depletion Gross Margin Impairment 1 Net (Loss) Earnings Cash Flow Total Assets Gold Salobo $ 76,329 $ 23,317 $ 22,114 $ 30,898 $ - $ 30,898 $ 58,184 $ 2,651,697 Sudbury 2 10,840 3,324 6,807 709 - 709 7,572 356,328 Constancia 5,830 1,763 1,592 2,475 - 2,475 3,954 113,964 San Dimas 13,601 6,226 3,184 4,191 - 4,191 9,776 201,448 Stillwater 4,366 771 1,714 1,881 - 1,881 3,595 233,233 Other 3 7,904 2,452 2,445 3,007 - 3,007 5,505 17,246 Total gold interests $ 118,870 $ 37,853 $ 37,856 $ 43,161 $ - $ 43,161 $ 88,586 $ 3,573,916 Silver Peñasquito $ 13,582 $ 3,839 $ 2,794 $ 6,949 $ - $ 6,949 $ 9,743 $ 382,363 Antamina 17,660 3,530 10,352 3,778 - 3,778 14,277 688,767 Constancia 7,119 2,819 3,586 714 - 714 3,652 237,136 Other 4 24,952 11,612 4,338 9,002 - 9,002 14,230 496,675 Total silver interests $ 63,313 $ 21,800 $ 21,070 $ 20,443 $ - $ 20,443 $ 41,902 $ 1,804,941 Palladium Stillwater $ 7,283 $ 1,304 $ 2,478 $ 3,501 $ - $ 3,501 $ 5,979 $ 254,772 Cobalt Voisey’s Bay $ - $ - $ - $ - $ 165,912 $ (165,912 ) $ - $ 227,510 Total mineral stream interests $ 189,466 $ 60,957 $ 61,404 $ 67,105 $ 165,912 $ (98,807 ) $ 136,467 $ 5,861,139 Other General and administrative $ (12,249 ) $ (9,189 ) Finance costs (13,306 ) (14,828 ) Other (3,090 ) (3,168 ) Income tax recovery 2,758 (24 ) Total other $ (25,887 ) $ (27,209 ) $ 379,684 Consolidated $ (124,694 ) $ 109,258 $ 6,240,823 1) See Note 11 for more information. 2) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 3) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating 777 gold interest and the non-operating 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Aljustrel, and 777 silver interests and the non-operating Three Months Ended June 30, 2018 (in thousands) Sales Cost of Sales Depletion Net Earnings Cash Flow From Operations Total Assets Gold Salobo $ 92,327 $ 28,294 $ 27,316 $ 36,717 $ 64,033 $ 2,760,314 Sudbury 1 5,778 1,760 3,498 520 4,020 372,366 Constancia 2,857 869 812 1,176 1,989 120,025 San Dimas 4,733 2,243 2,079 411 2,490 218,158 Other 2 8,058 2,307 2,075 3,676 5,850 26,950 Total gold interests $ 113,753 $ 35,473 $ 35,780 $ 42,500 $ 78,382 $ 3,497,813 Silver San Dimas 3 $ 17,673 $ 4,622 $ 1,567 $ 11,484 $ 13,051 $ - Peñasquito 25,315 6,452 4,572 14,291 18,863 395,052 Antamina 23,736 4,676 12,369 6,691 19,060 732,979 Constancia 6,826 2,418 2,927 1,481 4,409 254,773 Other 4 25,097 8,939 5,279 10,879 16,014 511,851 Total silver interests $ 98,647 $ 27,107 $ 26,714 $ 44,826 $ 71,397 $ 1,894,655 Cobalt Voisey’s Bay $ - $ - $ - $ - $ - $ 393,327 Total mineral stream interests $ 212,400 $ 62,580 $ 62,494 $ 87,326 $ 149,779 $ 5,785,795 Other General and administrative $ (11,972) $ (8,273) Finance costs (7,367) (8,031) Gain on disposal of San Dimas SPA 3 245,715 - Other 1,216 1,773 Income tax recovery 3,224 (48) Total other $ 230,816 $ (14,579) $ 430,317 Consolidated $ 318,142 $ 135,200 $ 6,216,112 1) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 2) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating Minto and 777 gold interests and the non-operating 3) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the new San Dimas PMPA. 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Minto, and 777 silver interests, the non-operating Six Months Ended June 30, 2019 (in thousands) Sales Cost of Sales Depletion Gross Margin Impairment 1 Net (Loss) Earnings Cash Flow Total Assets Gold Salobo $ 186,400 $ 57,317 $ 54,363 $ 74,720 $ - $ 74,720 $ 134,254 $ 2,651,697 Sudbury 2 16,107 4,948 10,135 1,024 - 1,024 11,215 356,328 Constancia 13,057 3,968 3,583 5,506 - 5,506 9,089 113,964 San Dimas 28,731 13,132 6,747 8,852 - 8,852 18,000 201,448 Stillwater 8,087 1,440 3,195 3,452 - 3,452 6,647 233,233 Other 3 16,888 5,029 4,113 7,746 - 7,746 12,237 17,246 Total gold interests $ 269,270 $ 85,834 $ 82,136 $ 101,300 $ - $ 101,300 $ 191,442 $ 3,573,916 Silver Peñasquito $ 31,883 $ 8,739 $ 6,359 $ 16,785 $ - $ 16,785 $ 23,143 $ 382,363 Antamina 37,274 7,418 21,310 8,546 - 8,546 29,857 688,767 Constancia 18,490 7,153 9,095 2,242 - 2,242 11,337 237,136 Other 4 42,827 18,406 5,969 18,452 - 18,452 25,036 496,675 Total silver interests $ 130,474 $ 41,716 $ 42,733 $ 46,025 $ - $ 46,025 $ 89,373 $ 1,804,941 Palladium Stillwater $ 14,771 $ 2,621 $ 4,916 $ 7,234 $ - $ 7,234 $ 12,150 $ 254,772 Cobalt Voisey’s Bay $ - $ - $ - $ - $ 165,912 $ (165,912 ) $ - $ 227,510 Total mineral stream interests $ 414,515 $ 130,171 $ 129,785 $ 154,559 $ 165,912 $ (11,353 ) $ 292,965 $ 5,861,139 Other General and administrative $ (28,784 ) $ (33,900 ) Finance costs (27,252 ) (26,074 ) Other (2,824 ) (1,954 ) Income tax recovery 2,868 (3,585 ) Total other $ (55,992 ) $ (65,513 ) $ 379,684 Consolidated $ (67,345 ) $ 227,452 $ 6,240,823 1) See Note 11 for more information. 2) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 3) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating 777 gold interest and the non-operating 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Aljustrel, and 777 silver interests and the non-operating Six Months Ended June 30, 2018 (in thousands) Sales Cost of Sales Depletion Net Earnings Cash Flow From Operations Total Assets Gold Salobo $ 165,162 $ 50,152 $ 48,418 $ 66,592 $ 115,010 $ 2,760,314 Sudbury 1 12,679 3,834 7,622 1,223 8,968 372,366 Constancia 7,168 2,168 2,026 2,974 5,001 120,025 San Dimas 4,733 2,243 2,079 411 2,490 218,158 Other 2 17,097 4,991 4,868 7,238 11,001 26,950 Total gold interests $ 206,839 $ 63,388 $ 65,013 $ 78,438 $ 142,470 $ 3,497,813 Silver San Dimas 3 $ 40,594 $ 10,549 $ 3,575 $ 26,470 $ 30,045 $ - Peñasquito 45,935 11,568 8,198 26,169 34,367 395,052 Antamina 47,506 9,496 24,659 13,351 38,010 732,979 Constancia 16,406 5,807 7,030 3,569 10,599 254,773 Other 4 54,372 18,186 11,284 24,902 36,037 511,851 Total silver interests $ 204,813 $ 55,606 $ 54,746 $ 94,461 $ 149,058 $ 1,894,655 Cobalt Voisey’s Bay $ - $ - $ - $ - $ - $ 393,327 Total mineral stream interests $ 411,652 $ 118,994 $ 119,759 $ 172,899 $ 291,528 $ 5,785,795 Other General and administrative $ (21,729 ) $ (17,918 ) Finance costs (14,474 ) (14,567 ) Gain on disposal of San Dimas SPA 3 245,715 — Other 145 1,595 Income tax recovery 3,709 (98 ) Total other $ 213,366 $ (30,988 ) $ 430,317 Consolidated $ 386,265 $ 260,540 $ 6,216,112 1) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 2) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating Minto and 777 gold interests and the non-operating 3) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the new San Dimas PMPA. 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Minto, and 777 silver interests, the non-operating Geographical Areas The Company’s geographical information, which is based on the location of the mining operations to which the mineral stream interests relate, are summarized in the tables below: Sales Carrying Amount at June 30, 2019 (in thousands) Three Months Jun 30, 2019 Six Months Jun 30, 2019 Gold Interests Silver Interests Palladium Interests Cobalt Interests Total North America Canada $ 20,390 11 % $ 36,642 9 % $ 373,575 $ 32,861 $ - $ 227,510 $ 633,946 11 % United States 11,648 6 % 22,858 5 % 233,232 557 254,772 - 488,561 8 % Mexico 27,573 15 % 61,595 15 % 201,446 383,702 - - 585,148 10 % Europe Greece 3,637 2 % 4,905 1 % - 4,356 - - 4,356 0 % Portugal 6,127 3 % 16,347 4 % - 21,848 - - 21,848 0 % Sweden 5,080 3 % 8,642 2 % - 36,495 - - 36,495 1 % South America Argentina/Chile 1 - 0 % - 0 % - 264,401 - - 264,401 5 % Brazil 76,329 40 % 186,400 45 % 2,651,699 - - - 2,651,699 45 % Peru 38,682 20 % 77,126 19 % 113,964 1,060,721 - - 1,174,685 20 % Consolidated $ 189,466 100 % $ 414,515 100 % $ 3,573,916 $ 1,804,941 $ 254,772 $ 227,510 $ 5,861,139 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile. Sales Carrying Amount at June 30, 2018 (in thousands) Three Months Jun 30, 2018 Six Months Ended Jun 30, 2018 Gold Interests Silver Interests Palladium Interests Cobalt Interests Total North America Canada $ 15,448 7 % $ 33,917 8 % $ 399,317 $ 35,546 $ - $ 393,327 $ 828,190 14 % United States - 0 % - 0 % - 433 - - 433 0 % Mexico 48,285 23 % 92,693 23 % 218,158 396,458 - - 614,616 10 % Europe Greece 2,763 1 % 5,248 1 % - 7,108 - - 7,108 0 % Portugal 2,916 1 % 5,718 1 % - 23,141 - - 23,141 0 % Sweden 4,882 2 % 11,316 3 % - 38,623 - - 38,623 1 % South America Argentina/Chile 1 1,723 2 % 4,419 1 % - 264,411 - - 264,411 5 % Brazil 92,327 43 % 165,162 40 % 2,760,314 - - - 2,760,314 48 % Peru 44,056 21 % 93,179 23 % 120,024 1,128,935 - - 1,248,959 22 % Consolidated $ 212,400 100 % $ 411,652 100 % $ 3,497,813 $ 1,894,655 $ - $ 393,327 $ 5,785,795 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
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Subsequent Events	28. Subsequent Events Declaration of Dividend Under the Company’s dividend policy, the quarterly dividend per common share is targeted to equal approximately 30% of the average cash flow generated by operating activities in the previous four quarters divided by the Company’s then outstanding common shares, all rounded to the nearest cent. To minimize volatility in quarterly dividends, the Company has set a minimum quarterly dividend of $0.09 per common share for the duration of 2019. The declaration, timing, amount and payment of future dividends remain at the discretion of the Board of Directors. On August 8, 2019, the Board of Directors declared a dividend in the amount of $0.09 per common share, with this dividend being payable to shareholders of record on August 23, 2019 and is expected to be distributed on or about September 5, 2019. The Company has implemented a dividend reinvestment plan (“DRIP”) whereby shareholders can elect to have dividends reinvested directly into additional Wheaton common shares at a discount of 3% of the Average Market Price, as defined in the DRIP.

Basis of Presentation and Sta_2

Basis of Presentation and Statement of Compliance (Policies)	6 Months Ended
	Jun. 30, 2019
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Basis of Presentation and Statement of Compliance	These unaudited condensed interim consolidated financial statements have been prepared on a historical cost basis, except for certain financial instruments which have been measured at fair value as at the relevant balance sheet date. The consolidated financial statements are presented in United States (“US”) dollars, which is the Company’s functional currency, and all values are rounded to the nearest thousand US dollars (US$ 000’s) unless otherwise noted. References to “Cdn$” refer to Canadian dollars. These unaudited condensed interim consolidated financial statements have been prepared in accordance with IAS 34, Interim Financial Reporting (“IAS 34”). The accounting policies applied in these unaudited condensed interim consolidated financial statements are based on International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”) and have been prepared using the same accounting policies and methods of application as disclosed in Note 3 to the audited consolidated financial statements for the year ended December 31, 2018 and were consistently applied to all the periods presented unless otherwise stated below. These unaudited condensed interim consolidated financial statements do not include all the information and note disclosures required by IFRS for annual consolidated financial statements and therefore should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2018. The preparation of financial statements in accordance with IAS 34 requires the use of certain accounting estimates. It also requires management to exercise judgment in applying the Company’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the financial statements, are disclosed in Note 4. In the opinion of management, all adjustments (including normal recurring adjustments) necessary to present fairly the financial position at June 30, 2019 and the results of operations and cash flows for all periods presented have been made. The interim results are not necessarily indicative of results for a full year.
IFRIC 23 - Uncertainty over Income Tax Treatments	IFRIC 23 – Uncertainty over Income Tax Treatments: On January 1, 2019, the Company adopted IFRIC 23 – Uncertainty over Income Tax Treatments. IFRIC 23 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 adoption of this guidance did not have a material impact on the Company’s Consolidated Statement of Earnings.
IFRS 16 - Leases	IFRS 16 – Leases: General Impact of Application of IFRS 16 - Leases On January 1, 2019, the Company adopted IFRS 16 – Leases (“IFRS16”), which supersedes IAS 17 – Leases (“IAS 17”). IFRS 16 removes the distinction between operating leases and finance leases and instead has all leases accounted for as a finance lease which requires the recognition of a right-of-use right-of The Company determined that it had two leases which are subject to the provisions of IFRS 16, specifically related to its offices in Vancouver, Canada and the Cayman Islands. As a result, at January 1, 2019, the Company recognized an additional $5 million of right-of-use The Company has applied the new standard prospectively with no restatement of the prior periods. A reconciliation of the lease commitment relative to these two leases as reported on the financial statements for the year ended December 31, 2018 and the lease liability which has been reflected on the balance sheet effective January 1, 2019 is as follows: (in thousands) Lease commitment as disclosed at December 31, 2018 Not later than 1 year $ 789 Later than 1 year and not later than 5 years 2,772 Later than 5 years 224 Total lease commitment as disclosed at December 31, 2018 $ 3,785 Extension option reasonably certain to be exercised 1 1,530 Less: Discounting using the incremental borrowing rate 2 (636 ) Lease liability as at January 1, 2019 $ 4,679 Lease liability is comprised of: Current portion $ 679 Long-term portion 4,000 Lease liability as at January 1, 2019 $ 4,679 1)  The Company’s office lease in the Cayman Islands contains two optional extension periods. Upon applying IFRS 16, the Company concluded it was reasonably certain to exercise the first extension period. The second extension period, which covers a term of 5 years, was not included in the calculation of the lease liability. 2)  The future cash outflows were discounted using the Company’s estimated incremental borrowing rate ranging from 3.9764% to 4.3340%.       Accounting Policy – The Company as a Lessee At inception of a contract, the Company assesses whether the contract is, or contains, a lease. A contract is, or contains, a lease if the contract conveys the right to use an identified asset for a period of time in exchange for consideration. The Company recognizes a right-of-use The lease liability is initially measured at the present value of the lease payments that are not paid at the commencement date discounted by using the rate implicit in the lease. If this rate cannot be readily determined, the Company uses its incremental borrowing rate. The lease liability is subsequently measured by increasing the carrying amount to reflect interest on the lease liability (using the effective interest method) and by reducing the carrying amount to reflect the lease payments made. The Company re-measures right-of-use re-measured The right-of-use

Significant Accounting Polici_2

Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
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Schedule of Lease Liability	A reconciliation of the lease commitment relative to these two leases as reported on the financial statements for the year ended December 31, 2018 and the lease liability which has been reflected on the balance sheet effective January 1, 2019 is as follows: (in thousands) Lease commitment as disclosed at December 31, 2018 Not later than 1 year $ 789 Later than 1 year and not later than 5 years 2,772 Later than 5 years 224 Total lease commitment as disclosed at December 31, 2018 $ 3,785 Extension option reasonably certain to be exercised 1 1,530 Less: Discounting using the incremental borrowing rate 2 (636 ) Lease liability as at January 1, 2019 $ 4,679 Lease liability is comprised of: Current portion $ 679 Long-term portion 4,000 Lease liability as at January 1, 2019 $ 4,679 1)  The Company’s office lease in the Cayman Islands contains two optional extension periods. Upon applying IFRS 16, the Company concluded it was reasonably certain to exercise the first extension period. The second extension period, which covers a term of 5 years, was not included in the calculation of the lease liability. 2)  The future cash outflows were discounted using the Company’s estimated incremental borrowing rate ranging from 3.9764% to 4.3340%.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
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Summary of Financial Assets and Liabilities Measured at Fair Value by Level within Fair Value Hierarchy	The following table sets forth the Company’s financial assets and liabilities measured at fair value by level within the fair value hierarchy. As required by IFRS 13, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. June 30, 2019 (in thousands) Note Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 87,182 $ 87,182 $ - $ - Trade receivables from provisional concentrate sales, net of fair value adjustment 9 98 - 98 - Long-term investments - common shares held 16 216,319 216,319 - - Long-term investments - warrants held 16 9 - 9 - Convertible note receivable 15 11,836 - - 11,836 $ 315,444 $ 303,501 $ 107 $ 11,836 December 31, 2018 (in thousands) Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 75,767 $ 75,767 $ - $ - Trade receivables from provisional concentrate sales, net of fair value adjustment 9 1,332 - 1,332 - Long-term investments - common shares held 16 164,753 164,753 - - Long-term investments - warrants held 16 - - - - Convertible note receivable 15 12,899 - - 12,899 $ 254,751 $ 240,520 $ 1,332 $ 12,899

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
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Summary of Revenue	Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Sales Gold Gold credit sales $ 117,873 62% $ 110,688 52% $ 263,991 64% $ 201,545 49% Concentrate sales 997 1% 3,065 2% 5,279 1% 5,294 1% $ 118,870 63% $ 113,753 54% $ 269,270 65% $ 206,839 50% Silver Silver credit sales $ 48,446 25% $ 87,620 41% $ 100,097 24% $ 182,109 44% Concentrate sales 14,867 8% 11,027 5% 30,377 7% 22,704 6% $ 63,313 33% $ 98,647 46% $ 130,474 31% $ 204,813 50% Palladium Palladium credit sales $ 7,283 4% $ - 0% $ 14,771 4% $ - 0% Total sales revenue $ 189,466 100% $ 212,400 100% $ 414,515 100% $ 411,652 100%

General and Administrative (Tab

General and Administrative (Tables)	6 Months Ended
	Jun. 30, 2019
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Summary of General and Administrative Expense	Three Months Ended June 30 Six Months Ended June 30 (in thousands) Note 2019 2018 2019 2018 Salaries and benefits Salaries and benefits, excluding PSUs $ 3,771 $ 3,458 $ 7,668 $ 7,049 PSUs 1 21.1 2,417 3,316 9,541 3,499 Total salaries and benefits $ 6,188 $ 6,774 $ 17,209 $ 10,548 Depreciation 467 233 960 473 Donations 333 439 809 1,138 Professional fees 970 515 1,333 1,876 Other 2,835 2,617 5,660 5,051 General and administrative before equity settled stock based compensation $ 10,793 $ 10,578 $ 25,971 $ 19,086 Equity settled stock based compensation 2 Stock options 20.2 $ 642 $ 584 $ 1,210 $ 1,235 RSUs 20.3 814 810 1,603 1,408 Total equity settled stock based compensation $ 1,456 $ 1,394 $ 2,813 $ 2,643 Total general and administrative $ 12,249 $ 11,972 $ 28,784 $ 21,729 1)  The PSU accrual related to the anticipated fair value of the PSUs issued uses a weighted average performance factor of 181% during the three and six months ended June 30, 2019 as compared to 83% during the comparable period of 2018. 2)  Equity settled stock based compensation is a non-cash

Other (Income) Expense (Tables)

Other (Income) Expense (Tables)	6 Months Ended
	Jun. 30, 2019
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Summary of Other (Income) Expense	Three Months Ended June 30 Six Months Ended June 30 (in thousands) Note 2019 2018 2019 2018 Interest income $ (274) $ (279) $ (500) $ (462) Dividends received 16 (23) (18) (39) (39) Guarantee fees - Primero Revolving Credit Facility - (858) - (858) Fees for contract amendments and reconciliations - - - (248) Share of losses of associate 14 - - 62 201 Impairment loss - investment in associate 14 1,649 - 1,649 - Foreign exchange loss (gain) 146 26 819 (144) Net (gain) loss arising on financial assets mandatorily measured at FVTPL ¹ Loss on fair value adjustment of share purchase warrants held 16 7 12 7 111 (Gain) loss on fair value adjustment of Kutcho Convertible Note 15 1,934 (99) 1,063 1,290 Other (349) - (237) 4 Total other (income) expense $ 3,090 $ (1,216) $ 2,824 $ (145) 1) FVTPL refers to Fair Value Through Profit or Loss.

Accounts Receivable (Tables)

Accounts Receivable (Tables)	6 Months Ended
	Jun. 30, 2019
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Summary of Accounts Receivable	(in thousands) Note June 30 2019 December 31 2018 Trade receivables from provisional concentrate sales, net of fair value adjustment 6 $ 98 $ 1,332 Other accounts receivable 1,226 854 Total accounts receivable $ 1,324 $ 2,186

Mineral Stream Interests (Table

Mineral Stream Interests (Tables)	6 Months Ended
	Jun. 30, 2019
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Schedule of Mineral Stream Interests	Six Months Ended June 30, 2019 Cost Accumulated Depletion & Impairment 1 Carrying (in thousands) Balance Jan 1, 2019 Additions Balance Jun 30, 2019 Balance Jan 1, 2019 Depletion Impairment Balance Jun 30, 2019 Amount Jun 30, 2019 Gold interests Salobo $ 3,059,876 $ - $ 3,059,876 $ (353,816) $ (54,363) $ - $ (408,179) $ 2,651,697 Sudbury 2 623,864 - 623,864 (257,401) (10,135) - (267,536) 356,328 Constancia 136,058 - 136,058 (18,511) (3,583) - (22,094) 113,964 San Dimas 220,429 - 220,429 (12,234) (6,747) - (18,981) 201,448 Stillwater 239,357 (4) 239,353 (2,925) (3,195) - (6,120) 233,233 Other 3 402,232 - 402,232 (380,873) (4,113) - (384,986) 17,246 $ 4,681,816 $ (4) $ 4,681,812 $ (1,025,760) $ (82,136) $ - $ (1,107,896) $ 3,573,916 Silver interests Peñasquito $ 524,626 - 524,626 $ (135,904) $ (6,359) $ - $ (142,263) $ 382,363 Antamina 900,343 - 900,343 (190,266) (21,310) - (211,576) 688,767 Constancia 302,948 - 302,948 (56,717) (9,095) - (65,812) 237,136 Other 4 1,283,039 6 1,283,045 (780,401) (5,969) - (786,370) 496,675 $ 3,010,956 $ 6 $ 3,010,962 $ (1,163,288) $ (42,733) $ - $ (1,206,021) $ 1,804,941 Palladium interests Stillwater $ 263,726 $ (5) $ 263,721 $ (4,033) $ (4,916) $ - $ (8,949) $ 254,772 Cobalt interests Voisey’s Bay $ 393,422 $ - $ 393,422 $ - $ - $ (165,912) $ (165,912) $ 227,510 $ 8,349,920 $ (3) $ 8,349,917 $ (2,193,081) $ (129,785) $ (165,912) $ (2,488,778) $ 5,861,139 1) Includes cumulative impairment charges to June 30, 2019 as follows: Keno Hill silver interest - $11 million; Pascua-Lama silver interest - $338 million; 777 silver interest - $64 million; 777 gold interest - $151 million; Sudbury gold interest - $120 million; and Voisey’s Bay cobalt interest - $166 million. 2) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 3) Comprised of the Minto, Rosemont and 777 gold interests. 4) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Rosemont and 777 silver interests. Year Ended December 31, 2018 Cost Accumulated Depletion & Impairment 1 Carrying Amount Dec 31, 2018 (in thousands) Balance Jan 1, 2018 Additions Disposal Balance Dec 31, 2018 Balance Jan 1, 2018 Depletion Disposal Balance Dec 31, 2018 Gold interests Salobo $ 3,059,876 $ - $ - $ 3,059,876 $ (251,144) $ (102,672) $ - $ (353,816) $ 2,706,060 Sudbury 2 623,864 - - 623,864 (243,876) (13,525) - (257,401) 366,463 Constancia 136,058 - - 136,058 (14,007) (4,504) - (18,511) 117,547 San Dimas - 220,429 - 220,429 - (12,234) - (12,234) 208,195 Stillwater - 239,357 - 239,357 - (2,925) - (2,925) 236,432 Other 3 402,232 - - 402,232 (370,414) (10,459) - (380,873) 21,359 $ 4,222,030 $ 459,786 $ - $ 4,681,816 $ (879,441) $ (146,319) $ - $ (1,025,760) $ 3,656,056 Silver interests San Dimas $ 190,331 $ - $ (190,331) $ - $ (55,469) $ (3,575) $ 59,044 $ - $ - Peñasquito 524,626 - - 524,626 (121,376) (14,528) - (135,904) 388,722 Antamina 900,343 - - 900,343 (142,705) (47,561) - (190,266) 710,077 Constancia 302,948 - - 302,948 (41,145) (15,572) - (56,717) 246,231 Other 4 1,282,837 202 - 1,283,039 (759,702) (20,699) - (780,401) 502,638 $ 3,201,085 $ 202 $ (190,331) $ 3,010,956 $ (1,120,397) $ (101,935) $ 59,044 $ (1,163,288) $ 1,847,668 Palladium interests Stillwater $ - $ 263,726 - $ 263,726 $ - $ (4,033) - $ (4,033) $ 259,693 Cobalt interests Voisey’s Bay $ - $ 393,422 - $ 393,422 $ - $ - - $ - $ 393,422 $ 7,423,115 $ 1,117,136 $ (190,331) $ 8,349,920 $ (1,999,838) $ (252,287) $ 59,044 $ (2,193,081) $ 6,156,839 1) Includes cumulative impairment charges to December 31, 2018 as follows: Keno Hill silver interest - $11 million; Pascua-Lama silver interest - $338 million; 777 silver interest - $64 million; 777 gold interest - $151 million; and Sudbury gold interest - $120 million. 2) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 3) Comprised of the Minto, Rosemont and 777 gold interests. 4) Comprised of the currently owned Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Rosemont and 777 silver interests in addition to the Lagunas Norte, Pierina and Veladero silver interests, all of which expired on March 31, 2018.
Classification of Mining Interest Between Depletable and Non-depletable	June 30, 2019 December 31, 2018 (in thousands) Depletable Non- Depletable Total Depletable Non- Depletable Total Gold interests Salobo $ 2,125,107 $ 526,590 $ 2,651,697 $ 2,171,292 $ 534,768 $ 2,706,060 Sudbury 1 303,126 53,202 356,328 308,041 58,422 366,463 Constancia 104,821 9,143 113,964 108,403 9,144 117,547 San Dimas 94,674 106,774 201,448 101,421 106,774 208,195 Stillwater 206,401 26,832 233,233 209,569 26,863 236,432 Other 2 17,246 - 17,246 21,359 - 21,359 $ 2,851,375 $ 722,541 $ 3,573,916 $ 2,920,085 $ 735,971 $ 3,656,056 Silver interests Peñasquito $ 295,153 $ 87,210 $ 382,363 $ 284,194 $ 104,528 $ 388,722 Antamina 342,105 346,662 688,767 353,679 356,398 710,077 Constancia 221,123 16,013 237,136 230,983 15,248 246,231 Other 3 92,676 403,999 496,675 87,386 415,252 502,638 $ 951,057 $ 853,884 $ 1,804,941 $ 956,242 $ 891,426 $ 1,847,668 Palladium interests Stillwater $ 243,288 $ 11,484 $ 254,772 $ 248,299 $ 11,394 $ 259,693 Cobalt interests Voisey’s Bay $ - $ 227,510 $ 227,510 $ - $ 393,422 $ 393,422 $ 4,045,720 $ 1,815,419 $ 5,861,139 $ 4,124,626 $ 2,032,213 $ 6,156,839 1) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 2) Comprised of the Minto, Rosemont and 777 gold interests. 3) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Rosemont and 777 silver interests.
Disclosure of Gain on Disposal of Mineral Stream Interest	(in thousands) Cash received $ 220,000 Fair value of First Majestic shares received 151,000 Fee from Goldcorp in exchange for release from the guarantee of deliveries relative to San Dimas 10,000 Total net proceeds from the disposal of the San Dimas SPA $ 381,000 Less: carrying value plus closing costs (135,285 ) Gain on disposal of the San Dimas SPA $ 245,715

Impairment of Mineral Stream _2

Impairment of Mineral Stream Interests (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Schedule of Impairment of Mineral Stream Interests	Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Cobalt Interests Voisey’s Bay $ 165,912 $ - $ 165,912 $ - Total impairment charges $ 165,912 $ - $ 165,912 $ -

Early Deposit Mineral Stream _2

Early Deposit Mineral Stream Interests (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Early Deposit Mineral Stream Interests	The following table summarizes the early deposit mineral stream interests currently owned by the Company: Attributable Production to be Purchased Early Deposit Mineral Stream Interests Mine Owner Location of Mine Upfront Consideration 1 Upfront Consideration to be Paid 1, 2 Total Upfront Consideration¹ Gold Silver Term of Agreement Toroparu Sandspring Guyana $ 15,500 $ 138,000 $ 153,500 10% 50% Life of Mine Cotabambas Panoro Peru 7,750 132,250 140,000 25% 3 100% 3 Life of Mine Kutcho Kutcho Canada 7,000 58,000 65,000 100% 4 100% 4 Life of Mine $ 30,250 $ 328,250 $ 358,500 1) Expressed in thousands of United States dollars; excludes closing costs and capitalized interest, where applicable. 2) Please refer to Note 26 for details of when the remaining upfront consideration to be paid becomes due. 3) Once 90 million silver equivalent ounces attributable to Wheaton have been produced, the attributable production to be purchased will decrease to 16.67% of gold production and 66.67% of silver production for the life of mine. 4) Once 51,000 ounces of gold and 5.6 million ounces of silver have been delivered to Wheaton, the stream will decrease to 66.67% of gold and silver production for the life of mine.

Investment in Associate (Tables

Investment in Associate (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Disclosure of Investment in Associate	A continuity schedule of the Kutcho Investment in Associate from January 1, 2018 to June 30, 2019 is presented below: (in thousands) Investment in At January 1, 2018 $ 2,995 Share of losses (201) At June 30, 2018 $ 2,794 Share of losses (231) At December 31, 2018 $ 2,563 Share of losses (62) At March 31, 2019 $ 2,501 Amount invested 132 Impairment (1,649) At June 30, 2019 $ 984

Convertible Note Receivable (Ta

Convertible Note Receivable (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Schedule of the Company's Convertible Note Receivable	A continuity schedule of the Kutcho Convertible Note from January 1, 2018 to June 30, 2019 is presented below: (in thousands) Convertible Note At January 1, 2018 $ 15,777 Fair value gain (loss) reflected in net earnings (1,388 ) At March 31, 2018 $ 14,389 Fair value gain (loss) reflected in net earnings 99 At June 30, 2018 $ 14,488 Fair value gain (loss) reflected in net earnings (1,589 ) At December 31, 2018 $ 12,899 Fair value gain (loss) reflected in net earnings 871 At March 31, 2019 $ 13,770 Fair value gain (loss) reflected in net earnings (1,934 ) At June 30, 2019 $ 11,836

Long-Term Equity Investments (T

Long-Term Equity Investments (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Long-Term Equity Investments	(in thousands) June 30 December 31 Common shares held $ 216,319 $ 164,753 Warrants held 9 - Total long-term equity investments $ 216,328 $ 164,753 Common Shares Held Fair Value Adjustment Gains (Losses) Included in OCI (in thousands) Shares Owned Percentage Outstanding Fair Value at Jun 30, 2019 Three Months Jun 30, 2019 Six Months Ended Jun 30, 2019 Fair Value at Dec 31, 2018 Bear Creek 13,264,305 13% $ 16,825 $ 2,531 $ 6,713 $ 10,112 Sabina 11,700,000 4% 11,890 902 1,341 10,549 First Majestic 20,914,590 10% 165,434 27,816 42,247 123,187 Other 22,170 (1,223 ) 372 20,905 Total common shares held $ 216,319 $ 30,026 $ 50,673 $ 164,753 Fair Value Adjustment Gains (in thousands) Fair Value at Jun 30, 2018 Three Months Jun 30, 2018 Six Months Ended Jun 30, 2018 Bear Creek $ 17,829 $ (5,831) $ (3,528) Sabina 13,505 (831) (7,665) Arizona Mining 46,780 15,370 19,199 First Majestic 159,578 8,578 8,578 Other 23,467 (623) (3,050) Total common shares held $ 261,159 $ 16,663 $ 13,534

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Property Plant and Equipment	June 30, 2019 (in thousands) Leasehold Right of Use Other Total Cost Balance - January 1, 2019 $ 4,378 $ - $ 3,318 $ 7,696 Additions upon adoption of IFRS 16 - 4,679 - 4,679 Additions 5 - 148 153 Disposals (7 ) - (29 ) (36 ) Balance - June 30, 2019 $ 4,376 $ 4,679 $ 3,437 $ 12,492 Accumulated Depreciation Balance - January 1, 2019 $ (2,024 ) $ - $ (2,046 ) $ (4,070 ) Disposals 7 - 29 36 Depreciation (252 ) (363 ) (222 ) (837 ) Balance - June 30, 2019 $ (2,269 ) $ (363 ) $ (2,240 ) $ (4,871 ) Net book value - June 30, 2019 $ 2,107 $ 4,316 $ 1,197 $ 7,621

Credit Facilities (Tables)

Credit Facilities (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Details of Bank Debt	(in thousands) June 30 December 31 Current portion $ - $ - Long-term portion 1,095,500 1,264,000 Gross bank debt outstanding 1 $ 1,095,500 $ 1,264,000 1) There is $6 million unamortized debt issue costs associated with the Revolving Facility which have been recorded as a long-term asset under the classification Other (see Note 25).
Summary of Lease Liabilities Explanatory	The lease liability relative to the Company’s offices located in Vancouver, Canada and the Cayman Islands is as follows: (in thousands) June 30 December 31 Current portion $ 647 $ - Long-term portion 3,833 - Total lease liability $ 4,480 $ -
Summary of Finance Lease Maturity Analysis Explanatory	The maturity analysis of these leases is as follows: (in thousands) June 30 Not later than 1 year $ 647 Later than 1 year and not later than 5 years 3,066 Later than 5 years 767 Total lease liability $ 4,480
Summary of Company's Finance Costs	A summary of the Company’s finance costs relative to the above facilities during the period is as follows: Three Months Ended June 30 Six Months Ended June 30 (in thousands) Note 2019 2018 2019 2018 Interest Expense During Period Average principle outstanding during period $ 1,165,994 $ 657,144 $ 1,195,591 $ 687,516 Average effective interest rate during period 18.1 4.25% 3.44% 4.27% 3.27% Total interest expense incurred during period $ 12,388 $ 5,659 $ 25,508 $ 11,249 Costs related to undrawn credit facilities 18.1 871 1,218 1,712 2,418 Interest expense - lease liabilities 18.3 47 - 78 - Letters of guarantee 18.2 - 490 (46) 807 Total finance costs $ 13,306 $ 7,367 $ 27,252 $ 14,474

Issued Capital (Tables)

Issued Capital (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Capital Issued	(in thousands) Note June 30 December 31 Issued capital Share capital issued and outstanding: 446,265,488 common shares (December 31, 2018: 444,336,361 common shares) 19.1 $ 3,560,705 $ 3,516,437
Summary of Common Shares Issued and Outstanding	A continuity schedule of the Company’s issued and outstanding common shares from January 1, 2018 to June 30, 2019 is presented below: Number of Shares Weighted Average Price At January 1, 2018 442,724,309 Restricted share units released 1 70,175 $0.00 At March 31, 2018 442,794,484 Share purchase options exercised 1 46,800 Cdn$24.28 Restricted share units released 1 185 Cdn$0.00 Dividend reinvestment plan 2 718,453 US$21.09 At June 30, 2018 443,559,922 Restricted share units released 1 33,818 US$0.00 Dividend reinvestment plan 2 742,621 US$15.56 At December 31, 2018 444,336,361 Share purchase options exercised 1 752,170 Cdn$26.55 Restricted share units released 1 130,730 $0.00 At March 31, 2019 445,219,261 Share purchase options exercised 1 283,620 Cdn$26.09 Restricted share units released 1 185 $0.00 Dividend reinvestment plan 2 762,422 US$21.89 At June 30, 2019 446,265,488 1) The weighted average price of share purchase options exercised and restricted share units released represents the respective exercise price. 2) The Company has implemented a dividend reinvestment plan (“DRIP”) whereby shareholders can elect to have dividends reinvested directly into additional Wheaton common shares. The weighted average price for common shares issued under the DRIP represents the volume weighted average price of the common shares on the five trading days preceding the dividend payment date, less a discount of 3%.
Schedule of Dividends Declared	Three Months Ended June 30 Six Months Ended June 30 2019 2018 2019 2018 Dividends declared per share $ 0.09 $ 0.09 $ 0.18 $ 0.18 Average number of shares eligible for dividend (000’s) 445,928 443,197 445,597 442,996 Total dividends paid $ 40,133 $ 39,888 $ 80,207 $ 79,739 Paid as follows: Cash $ 31,950 80% $ 32,480 81% $ 63,515 79% $ 64,589 81% DRIP 2 8,183 20% 7,408 19% 16,692 21% 15,150 19% Total dividends paid $ 40,133 100% $ 39,888 100% $ 80,207 100% $ 79,739 100% Shares issued under the DRIP 378,135 347,461 762,422 718,453 1) US dollars in thousands, except per share amounts. 2) The Company has implemented a dividend reinvestment plan (“DRIP”) whereby shareholders can elect to have dividends reinvested directly into additional Wheaton common shares at a discount of 3% of the Average Market Price, as defined in the DRIP. 3) As at June 30, 2019, cumulative dividends of $998 million have been declared and paid by the Company.

Reserves (Tables)

Reserves (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Reserves	(in thousands) Note June 30 December 31 Reserves Share purchase warrants 20.1 $ 83,077 $ 83,077 Share purchase options 20.2 26,771 31,002 Restricted share units 20.3 4,843 5,970 Long-term investment revaluation reserve, net of tax 20.4 (63,484 ) (112,156 ) Total reserves $ 51,207 $ 7,893
Summary of Share Purchase Warrants	The Company’s share purchase warrants (“warrants”) are presented below: Number of Weighted Exchange Share Warrants outstanding 10,000,000 $43.75 1.00 $ 83,077
Summary of Fair Value of Share Purchase Options	The weighted average fair value of share purchase options granted and principal assumptions used in applying the Black-Scholes option pricing model are as follows: Three Months Ended June 30 Six Months Ended June 30 2019 2018 2019 2018 Black-Scholes weighted average assumptions Grant date share price and exercise price Cdn$29.79 Cdn$27.96 Cdn$32.88 Cdn$26.25 Expected dividend yield 1.60% 1.65% 1.49% 1.73% Expected volatility 30% 35% 31% 35% Risk-free interest rate 1.43% 2.37% 1.60% 1.91% Expected option life, in years 2.5 2.5 2.5 2.5 Weighted average fair value per option granted Cdn$5.29 Cdn$6.00 Cdn$6.10 Cdn$5.49 Number of options issued during the period 8,200 3,880 583,500 549,210 Total fair value of options issued (000’s) $ 32 $ 18 $ 2,652 $ 2,347
Disclosure of Outstanding Share Purchase Options	A continuity schedule of the Company’s outstanding share purchase options from January 1, 2018 to June 30, 2019 is presented below: Number of Options Outstanding Weighted Average Exercise Price At January 1, 2018 4,232,260 Cdn$ 26.71 Granted (fair value - $2 million or Cdn$5.49 per option) 545,330 26.24 Expired (829,000 ) 32.75 At March 31, 2018 3,948,590 Cdn$ 25.50 Granted (fair value - Cdn$6.00 per option) 3,880 27.96 Exercised (46,800 ) 24.28 Forfeited (2,820 ) 26.98 Expired (15,000 ) 30.19 At June 30, 2018 3,887,850 Cdn$ 25.58 Forfeited (4,500 ) 30.65 At December 31, 2018 3,883,350 Cdn$ 25.71 Granted (fair value - $3 million or Cdn$6.11 per option) 575,300 32.92 Exercised (752,170 ) 26.55 Forfeited (1,350 ) 26.85 At March 31, 2019 3,705,130 Cdn$ 26.58 Granted (fair value - Cdn$5.29 per option) 8,200 29.79 Exercised (283,620 ) 26.09 Forfeited (4,745 ) 30.78 Expired (17,150 ) 30.69 At June 30, 2019 3,407,815 Cdn$ 26.52
Disclosure of Restricted Share Units Reserve	A continuity schedule of the Company’s restricted share units outstanding from January 1, 2018 to June 30, 2019 is presented below: Number of RSUs Outstanding Weighted Average Intrinsic Value At January 1, 2018 313,846 $ 20.71 Granted (fair value - $3 million) 160,270 20.41 Released (70,175 ) 20.98 At March 31, 2018 403,941 $ 20.54 Granted 790 21.89 Released (185 ) 20.44 Forfeited (595 ) 20.48 At June 30, 2018 403,951 $ 20.54 Released (33,818 ) 22.54 At December 31, 2018 370,133 $ 20.36 Granted (fair value - $3 million) 131,210 24.53 Released (130,730 ) 20.85 Forfeited (280 ) 20.51 At March 31, 2019 370,333 $ 21.66 Granted 1,400 22.12 Released (185 ) 20.44 Forfeited (830 ) 23.00 At June 30, 2019 370,718 $ 21.66
Disclosure of Long Term Investment Revaluation Reserve	A continuity schedule of the Company’s long-term investment revaluation reserve from January 1, 2018 to June 30, 2019 is presented below: (in thousands) Change in Deferred Total At January 1, 2018 $ (38,111) $ (1,936) $ (40,047) Unrealized gain (loss) on LTIs 1 (3,128) (458) (3,586) At March 31, 2018 $ (41,239) $ (2,394) $ (43,633) Unrealized gain (loss) on LTIs 1 16,663 (3,233) 13,430 At June 30, 2018 $ (24,576) $ (5,627) $ (30,203) Unrealized gain (loss) on LTIs 1 (53,520) 1,029 (52,491) Reallocate reserve to retained earnings upon disposal of LTIs 1 (34,060) 4,598 (29,462) At December 31, 2018 $ (112,156) $ - $ (112,156) Unrealized gain (loss) on LTIs 1 20,647 (45) 20,602 At March 31, 2019 $ (91,509) $ (45) $ (91,554) Unrealized gain (loss) on LTIs 1 30,026 (1,956) 28,070 At June 30, 2019 $ (61,483) $ (2,001) $ (63,484) 1) LTIs refers to long-term investments in common shares held.

Stock Based Compensation (Table

Stock Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Schedule of the Company's Outstanding PSUs	A continuity schedule of the Company’s outstanding PSUs (assuming a performance factor of 100% is achieved over the performance period) and the Company’s PSU accrual from January 1, 2018 to June 30, 2019 is presented below: Number of Outstanding PSU accrual At January 1, 2018 656,599 $ 1,430 Granted 218,670 - Accrual related to the fair value of the PSUs outstanding - 184 Foreign exchange adjustment - (32) Paid 1 (218,615) - At March 31, 2018 656,654 $ 1,582 Granted 1,590 - Accrual related to the fair value of the PSUs outstanding - 3,316 Foreign exchange adjustment - (21) Forfeited (2,517) (6) At June 30, 2018 655,727 $ 4,871 Accrual related to the fair value of the PSUs outstanding - 6,018 Foreign exchange adjustment - (132) At December 31, 2018 655,727 10,757 Granted 188,560 - Accrual related to the fair value of the PSUs outstanding - 7,124 Foreign exchange adjustment - 185 Paid (189,214) (7,701) Forfeited (616) (15) At March 31, 2019 654,457 10,350 Granted 2,850 - Accrual related to the fair value of the PSUs outstanding - 2,417 Foreign exchange adjustment - 148 Paid (39,836) (1,624) Forfeited (7,629) - At June 30, 2019 609,842 $ 11,291 1) The PSUs paid out during 2018 had a performance factor of 0% resulting in a cash disbursement of $Nil.
Schedule of Performance Share Units Outstanding	A summary of the PSUs outstanding at June 30, 2019 is as follows: Year of Grant Year of Maturity Number outstanding Estimated Anticipated Percent of June 30, 2019 PSU Liability at June 30, 2019 2017 2020 204,142 $23.98 197% 75% $ 7,214 2018 2021 216,440 $23.98 168% 42% 3,665 2019 2022 189,260 $23.98 106% 9% 412 609,842 $ 11,291

Earnings per Share ("EPS") an_2

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") (Tables)	6 Months Ended
	Jun. 30, 2019
Profit or loss [abstract]
Summary of Diluted EPS Calculated Based on Weighted Average Number of Shares Outstanding	Diluted EPS is calculated based on the following weighted average number of shares outstanding: Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Basic weighted average number of shares outstanding 445,769 443,191 445,083 442,961 Effect of dilutive securities Share purchase options 444 175 422 131 Restricted share units 257 404 310 361 Diluted weighted average number of shares outstanding 446,470 443,770 445,815 443,453
Summary of Share Purchase Options and Share Purchase Warrants Excluded From Computation of Diluted Earnings Per Share	The following table lists the number of share purchase options and share purchase warrants excluded from the computation of diluted earnings per share because the exercise prices exceeded the average market value of the common shares of Cdn$29.68 (six months - Cdn$28.96), compared to Cdn$27.76 (six months - Cdn$26.89) for the comparable period in 2018. Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Share purchase options 599 827 599 1,983 Share purchase warrants 10,000 10,000 10,000 10,000 Total 10,599 10,827 10,599 11,983

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Cash Flow Information	Change in Non-Cash Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Change in non-cash Accounts receivable $ 559 $ (4,663 ) $ 867 $ (3,784 ) Accounts payable and accrued liabilities 5,274 4,975 (2,267 ) 817 Other (1,174 ) (2,084 ) (1,111 ) (1,880 ) Total change in non-cash $ 4,659 $ (1,772 ) $ (2,511 ) $ (4,847 )

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Schedule of Income Tax Expense (Recovery)	Income tax recognized in net earnings is comprised of the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Current income tax expense $ 85 $ 29 $ 104 $ 51 Deferred income tax expense (recovery) related to: Origination and reversal of temporary differences $ 1,089 $ 845 $ 4,284 $ 1,891 Reversal of write down or recognition of prior period temporary differences (3,932 ) (4,098 ) (7,256 ) (5,651 ) Total deferred income tax expense (recovery) $ (2,843 ) $ (3,253 ) $ (2,972 ) $ (3,760 ) Income tax expense (recovery) recognized in net earnings $ (2,758 ) $ (3,224 ) $ (2,868 ) $ (3,709 )
Schedule of Income Tax Recognized as Component of OCI	Income tax recognized as a component of OCI is comprised of the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Income tax expense (recovery) related to LTIs - common shares held $ 1,956 $ 3,233 $ 2,001 $ 3,691 Income tax expense (recovery) recognized in OCI $ 1,956 $ 3,233 $ 2,001 $ 3,691
Schedule of Income Tax Recognized Directly in Equity	Income tax recognized directly in equity is comprised of the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Income tax expense (recovery) related to share issue costs Write down of previously recognized temporary differences $ 894 $ 30 $ 986 $ 89 Income tax expense (recovery) recognized in equity $ 894 $ 30 $ 986 $ 89
Schedule of Provision for Income taxes	The provision for income taxes differs from the amount that would be obtained by applying the statutory income tax rate to consolidated earnings before income taxes due to the following: Three Months Ended June 30, 2019 Six Months Ended June 30 (in thousands) 2019 2018 2019 2018 Earnings (loss) before income taxes $ (127,452) $ 314,918 $ (70,213) $ 382,556 Canadian federal and provincial income tax rates 27.00% 27.00% 27.00% 27.00% Income tax expense (recovery) based on above rates $ (34,413) $ 85,028 $ (18,958) $ 103,290 Non-deductible 1,225 1,128 1,795 1,915 Differences in tax rates in foreign jurisdictions (14,866) (86,764) (33,761) (106,925) Current period unrecognized temporary differences - impairments 44,796 - 44,796 - Current period unrecognized temporary differences 4,432 1,482 10,516 3,662 Reversal of write down or recognition of prior period temporary differences (3,932) (4,098) (7,256) (5,651) Income tax expense (recovery) $ (2,758) $ (3,224) $ (2,868) $ (3,709)
Deferred Income Tax Assets and Liabilities Recognized	The movement in deferred income tax assets and liabilities for the six months ended June 30, 2019 and the year ended December 31, 2018 is shown below: Six Months Ended June 30, 2019 Recognized deferred income tax assets and liabilities Opening Recovery Recovery Recovery Closing Balance Deferred tax assets Non-capital 1 $ 3,823 $ 1,002 $ - $ (936) $ 3,889 Capital loss carryforward 2 - 2,001 - - 2,001 Other 3 387 45 - - 432 Deferred tax liabilities Interest capitalized for accounting (87) - - - (87) Debt and share financing fees 4 (591) (61) - (50) (702) Unrealized gains on long-term investments - - (2,001) - (2,001) Mineral stream interests 5 (3,532) - - - (3,532) Foreign withholding tax (111) (14) - - (125) Total $ (111) $ 2,973 $ (2,001) $ (986) $ (125) 1) As at June 30, 2019, the Company had recognized the tax effect on $14 million of non-capital 2) As at June 30, 2019, the Company had recognized net capital losses of $7 million to offset unrealized taxable capital gains on long-term investments. 3) Other includes capital assets, charitable donation carryforward, and PSU accrual. 4) Debt and share financing fees are deducted over a five year period for Canadian income tax purposes. For accounting purposes, debt financing fees are deducted over the term of the credit facility and share financing fees are charged directly to issued capital. 5) The Company’s position, as reflected in its filed Canadian income tax returns and consistent with the terms of the PMPAs, is that the cost of the precious metal acquired under the Canadian PMPAs is equal to the market value while a deposit is outstanding (where applicable to an agreement), and the cash cost thereafter. For accounting purposes, the cost of the mineral stream interests is depleted on a unit-of-production Year Ended December 31, 2018 Recognized deferred income tax assets and liabilities Opening Recovery LTI Recovery Recovery Closing Balance Deferred tax assets Non-capital $ 3,848 $ (2,057) $ $ - $ 2,032 $ 3,823 Long-term investments - - - - - Capital loss carryforward 1,965 2,633 (4,598) - - - Foreign exchange on investments - - - - - Other 147 240 - - 387 Deferred tax liabilities Interest capitalized for accounting (87) - - - (87) Debt and share financing fees (375) (107) - (109) (591) Kutcho Convertible Note (29) 29 - - - Unrealized gains on long-term investments (1,937) 1 4,598 (2,662) - - Mineral stream interests (3,532) - - - (3,532) Foreign withholding tax (76) (35) - - (111) Total $ (76) $ 704 $ - $ (2,662) $ 1,923 $ (111)
Schedule of Deferred Income Tax Assets Unrecognized	Deferred income tax assets in Canada not recognized are shown below: (in thousands) June 30 2019 December 31 2018 Non-capital 1 $ 17,544 $ 7,209 Debt and equity financing fees 2,978 4,474 Mineral stream interests 110,750 67,717 Other 2,647 3,656 Capital loss carryforward 2 5,796 7,723 Kutcho Convertible Note 829 648 Unrealized losses on long-term investments 11,068 15,907 Total $ 151,612 $ 107,334 1) As at June 30, 2019, the Company had not recognized the tax effect on $65 million of non-capital 2) As at June 30, 2019, the Company had not recognized the tax effect on $21 million of net capital losses as a deferred tax asset.

Other Long-Term Assets (Tables)

Other Long-Term Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Composition of other long term assets table explanatory	The composition of other long-term assets are shown below: (in thousands) Note June 30 December 31 Intangible assets $ 4,203 $ 3,291 Debt issue costs - Revolving Facility 18.1 5,883 5,507 Other 1,447 1,517 Total other long-term assets $ 11,533 $ 10,315

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Summary of Commitments to Purchase Mineral Stream	The following table summarizes the Company’s commitments to make per-ounce Mineral Stream Interests Attributable Payable Production to be Per Unit of Measurement Cash Payment 1, 2 Term of Agreement Date of Original Contract Gold Silver Palladium Cobalt Gold Silver Palladium Cobalt Peñasquito 0% 25% 0% 0% n/a $ 4.21 n/a n/a Life of Mine 24-Jul-07 Constancia 50% 3 100% 0% 0% $ 400 4 $ 5.90 4 n/a n/a Life of Mine 8-Aug-12 Salobo 75% 0% 0% 0% $ 404 n/a n/a n/a Life of Mine 28-Feb-13 Sudbury 70% 0% 0% 0% $ 400 n/a n/a n/a 20 years 28-Feb-13 Antamina 0% 33.75% 0% 0% n/a variable 5 n/a n/a Life of Mine 3-Nov-15 San Dimas variable 6 0% 6 0% 0% $ 600 n/a n/a n/a Life of Mine 10-May-18 Stillwater 100% 0% 4.5% 7 0% variable 8 n/a variable 8 n/a Life of Mine 16-Jul-18 Voisey’s Bay 0% 0% 0% 42.4% 9 n/a n/a n/a variable 10 Life of Mine 11-Jun-18 Other Los Filos 0% 100% 0% 0% n/a $ 4.39 n/a n/a 25 years 15-Oct-04 Zinkgruvan 0% 100% 0% 0% n/a $ 4.39 n/a n/a Life of Mine 8-Dec-04 Yauliyacu 0% 100% 11 0% 0% n/a $ 8.89 12 n/a n/a Life of Mine 23-Mar-06 Stratoni 0% 100% 0% 0% n/a $ 9.31 13 n/a n/a Life of Mine 23-Apr-07 Neves-Corvo 0% 100% 0% 0% n/a $ 4.30 n/a n/a 50 years 5-Jun-07 Aljustrel 0% 100% 14 0% 0% n/a variable 15 n/a n/a 50 years 5-Jun-07 Minto 100% 16 100% 16 0% 0% $ 325 17 $ 4.22 n/a n/a Life of Mine 20-Nov-08 Keno Hill 0% 25% 0% 0% n/a variable 18 n/a n/a Life of Mine 2-Oct-08 Pascua-Lama 0% 25% 0% 0% n/a $ 3.90 n/a n/a Life of Mine 8-Sep-09 Rosemont 100% 100% 0% 0% $ 450 $ 3.90 n/a n/a Life of Mine 10-Feb-10 Loma de La Plata 0% 12.5% 0% 0% n/a $ 4.00 n/a n/a Life of Mine n/a 19 777 50% 100% 0% 0% $ 416 4 $ 6.14 4 n/a n/a Life of Mine 8-Aug-12 Early Deposit Toroparu 10% 50% 0% 0% $ 400 $ 3.90 n/a n/a Life of Mine 11-Nov-13 Cotabambas 25% 20 100% 20 0% 0% $ 450 $ 5.90 n/a n/a Life of Mine 21-Mar-16 Kutcho 100% 21 100% 21 0% 0% variable 22 variable 22 n/a n/a Life of Mine 12-Dec-17 1) Subject to an annual inflationary adjustment with the exception of Loma de La Plata and Sudbury. 2) All amounts are measured on a per ounce basis with the exception of cobalt which is measured on a per pound basis. Should the prevailing market price for the applicable metal be lower than this amount, the per ounce or per pound cash payment will be reduced to the prevailing market price, with the exception of Yauliyacu where the per ounce cash payment will not be reduced below $4.35 per ounce, subject to an annual inflationary factor. 3) Gold recoveries will be set at 55% for the Constancia deposit and 70% for the Pampacancha deposit until 265,000 ounces of gold have been delivered to the Company. 4) Subject to an increase to $9.90 per ounce of silver and $550 per ounce of gold after the initial 40-year 5) The Company is committed to pay Glencore 20% of the spot price of silver for each ounce of silver delivered under the Antamina PMPA. 6) Under the terms of the San Dimas PMPA, the Company is entitled to an amount equal to 25% of the payable gold production plus an additional amount of gold equal to 25% of the payable silver production converted to gold at a fixed gold to silver exchange ratio of 70:1 from the San Dimas mine. If the average gold to silver price ratio decreases to less than 50:1 or increases to more than 90:1 for a period of 6 months or more, then the “70” shall be revised to “50” or “90”, as the case may be, until such time as the average gold to silver price ratio is between 50:1 to 90:1 for a period of 6 months or more in which event the “70” shall be reinstated. 7) The Company is committed to purchase 4.5% of Stillwater palladium production until 375,000 ounces are delivered to the Company, thereafter 2.25% of Stillwater palladium production until 550,000 ounces are delivered to the Company and 1% of Stillwater palladium production thereafter for the life of mine. 8) The Company is committed to pay Sibanye 18% of the spot price of gold and palladium for each ounce of gold and palladium delivered under the Stillwater mines PMPA until the market value of gold and palladium delivered to Wheaton, net of the per ounce cash payment, exceeds the initial upfront cash deposit, and 22% of the spot price thereafter. 9) Once the Company has received 31 million pounds of cobalt, the Company’s attributable cobalt production to be purchased will be reduced to 21.2%. 10) The Company is committed to pay Vale 18% of the spot price of cobalt per pound of cobalt delivered under the agreement until the market value of cobalt delivered to Wheaton, net of the per pound cash payment, exceeds the initial upfront cash deposit, and 22% of the spot price thereafter. 11) Wheaton is committed to purchase from Glencore a per annum amount equal to the first 1.5 million ounces of payable silver produced at Yauliyacu and 50% of any excess. 12) Should the market price of silver exceed $20 per ounce, in addition to the $8.89 per ounce, the Company is committed to pay Glencore an additional amount for each ounce of silver delivered equal to 50% of the excess, to a maximum of $10 per ounce, such that when the market price of silver is $40 or above, the Company will pay Glencore $18.89 per ounce of silver delivered. 13) In October 2015, in order to incentivize additional exploration and potentially extend the limited remaining mine life of Stratoni, Wheaton and Eldorado Gold agreed to modify the Stratoni PMPA. The primary modification is to increase the production price per ounce of silver delivered to Wheaton over the current fixed price by one of the following amounts: (i) $2.50 per ounce of silver delivered if 10,000 meters of drilling is completed outside of the existing ore body and within Wheaton’s defined area of interest (“Expansion Drilling”); (ii) $5.00 per ounce of silver delivered if 20,000 meters of Expansion Drilling is completed; and (iii) $7.00 per ounce of silver delivered if 30,000 meters of Expansion Drilling is completed. Drilling in all three cases must be completed by December 31, 2020, in order for the agreed upon increase in production price to be initiated. The figures in the above table reflect the fact that Eldorado completed 20,000 meters of Expansion Drilling in June 2019. 14) Wheaton only has the rights to silver contained in concentrate containing less than 15% copper at the Aljustrel mine. 15) In respect of the Aljustrel PMPA, the Company is committed to pay Almina 50% of the amount received under the respective concentrate sales contracts. 16) The Company is committed to acquire 100% of the first 30,000 ounces of gold produced per annum and 50% thereafter. The Minto mine was placed into care and maintenance in October 2018. 17) The production payment per ounce of gold delivered to Wheaton is to be increased over the current fixed price in periods where the market price of copper is lower than $2.50 per pound. 18) The production payment related to the Keno Hill silver interest is a function of the silver head grade and silver spot price in the month in which the silver is produced. 19) Terms of the agreement not yet finalized. 20) Once 90 million silver equivalent ounces attributable to Wheaton have been produced, the attributable production to be purchased will decrease to 66.67% of silver production and 16.67% of gold production for the life of mine. 21) Once 51,000 ounces of gold and 5.6 million ounces of silver have been delivered to Wheaton, the stream will decrease to 66.67% of gold and silver production for the life of mine. 22) The Company is committed to pay Kutcho 20% of the spot price of gold and silver for each ounce of gold and silver delivered under the Kutcho Early Deposit Agreement.
Summary of Other Contractual Obligations and Contingencies	Other Contractual Obligations and Contingencies Obligations With Scheduled Payment Dates (in thousands) 2019 2020 - 2022 2023 - 2024 After 2024 Sub-Total Other Total Bank debt 1 $ - $ - $ 1,095,500 $ - $ 1,095,500 $ - $ 1,095,500 Interest 2 23,147 96,947 39,922 - 160,016 - 160,016 Payments for mineral stream interest 3 Rosemont 4 - - - - - 231,150 231,150 Loma de La Plata - - - - - 32,400 32,400 Payments for early deposit mineral stream interest Toroparu - - - - - 138,000 138,000 Cotabambas 750 4,500 1,000 - 6,250 126,000 132,250 Kutcho - - - - - 58,000 58,000 Operating leases 406 1,764 1,122 234 3,526 - 3,526 Total contractual obligations $ 24,303 $ 103,211 $ 1,137,544 $ 234 $ 1,265,292 $ 585,550 $ 1,850,842 1) At June 30, 2019, the Company had $1.1 billion drawn and outstanding on the Revolving Facility. 2) As the applicable interest rates are floating in nature, the interest charges are estimated based on market-based forward interest rate curves at the end of the reporting period combined with the assumption that the principal balance outstanding at June 30, 2019 does not change until the debt maturity date. 3) Does not reflect the contingent payment due related to the Salobo gold purchase agreement (see the Salobo section on the following page). 4) Includes contingent transaction costs of $1 million.

Segmented Information (Tables)

Segmented Information (Tables)	6 Months Ended
	Jun. 30, 2019
Text block [abstract]
Schedule of Operating Segments	The Company’s reportable operating segments, which are the components of the Company’s business where separate financial information is available and which are evaluated on a regular basis by the Company’s Chief Executive Officer (“CEO”), who is the Company’s chief operating decision maker, for the purpose of assessing performance, are summarized in the tables below: Three Months Ended June 30, 2019 (in thousands) Sales Cost of Sales Depletion Gross Margin Impairment 1 Net (Loss) Earnings Cash Flow Total Assets Gold Salobo $ 76,329 $ 23,317 $ 22,114 $ 30,898 $ - $ 30,898 $ 58,184 $ 2,651,697 Sudbury 2 10,840 3,324 6,807 709 - 709 7,572 356,328 Constancia 5,830 1,763 1,592 2,475 - 2,475 3,954 113,964 San Dimas 13,601 6,226 3,184 4,191 - 4,191 9,776 201,448 Stillwater 4,366 771 1,714 1,881 - 1,881 3,595 233,233 Other 3 7,904 2,452 2,445 3,007 - 3,007 5,505 17,246 Total gold interests $ 118,870 $ 37,853 $ 37,856 $ 43,161 $ - $ 43,161 $ 88,586 $ 3,573,916 Silver Peñasquito $ 13,582 $ 3,839 $ 2,794 $ 6,949 $ - $ 6,949 $ 9,743 $ 382,363 Antamina 17,660 3,530 10,352 3,778 - 3,778 14,277 688,767 Constancia 7,119 2,819 3,586 714 - 714 3,652 237,136 Other 4 24,952 11,612 4,338 9,002 - 9,002 14,230 496,675 Total silver interests $ 63,313 $ 21,800 $ 21,070 $ 20,443 $ - $ 20,443 $ 41,902 $ 1,804,941 Palladium Stillwater $ 7,283 $ 1,304 $ 2,478 $ 3,501 $ - $ 3,501 $ 5,979 $ 254,772 Cobalt Voisey’s Bay $ - $ - $ - $ - $ 165,912 $ (165,912 ) $ - $ 227,510 Total mineral stream interests $ 189,466 $ 60,957 $ 61,404 $ 67,105 $ 165,912 $ (98,807 ) $ 136,467 $ 5,861,139 Other General and administrative $ (12,249 ) $ (9,189 ) Finance costs (13,306 ) (14,828 ) Other (3,090 ) (3,168 ) Income tax recovery 2,758 (24 ) Total other $ (25,887 ) $ (27,209 ) $ 379,684 Consolidated $ (124,694 ) $ 109,258 $ 6,240,823 1) See Note 11 for more information. 2) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 3) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating 777 gold interest and the non-operating 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Aljustrel, and 777 silver interests and the non-operating Three Months Ended June 30, 2018 (in thousands) Sales Cost of Sales Depletion Net Earnings Cash Flow From Operations Total Assets Gold Salobo $ 92,327 $ 28,294 $ 27,316 $ 36,717 $ 64,033 $ 2,760,314 Sudbury 1 5,778 1,760 3,498 520 4,020 372,366 Constancia 2,857 869 812 1,176 1,989 120,025 San Dimas 4,733 2,243 2,079 411 2,490 218,158 Other 2 8,058 2,307 2,075 3,676 5,850 26,950 Total gold interests $ 113,753 $ 35,473 $ 35,780 $ 42,500 $ 78,382 $ 3,497,813 Silver San Dimas 3 $ 17,673 $ 4,622 $ 1,567 $ 11,484 $ 13,051 $ - Peñasquito 25,315 6,452 4,572 14,291 18,863 395,052 Antamina 23,736 4,676 12,369 6,691 19,060 732,979 Constancia 6,826 2,418 2,927 1,481 4,409 254,773 Other 4 25,097 8,939 5,279 10,879 16,014 511,851 Total silver interests $ 98,647 $ 27,107 $ 26,714 $ 44,826 $ 71,397 $ 1,894,655 Cobalt Voisey’s Bay $ - $ - $ - $ - $ - $ 393,327 Total mineral stream interests $ 212,400 $ 62,580 $ 62,494 $ 87,326 $ 149,779 $ 5,785,795 Other General and administrative $ (11,972) $ (8,273) Finance costs (7,367) (8,031) Gain on disposal of San Dimas SPA 3 245,715 - Other 1,216 1,773 Income tax recovery 3,224 (48) Total other $ 230,816 $ (14,579) $ 430,317 Consolidated $ 318,142 $ 135,200 $ 6,216,112 1) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 2) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating Minto and 777 gold interests and the non-operating 3) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the new San Dimas PMPA. 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Minto, and 777 silver interests, the non-operating Six Months Ended June 30, 2019 (in thousands) Sales Cost of Sales Depletion Gross Margin Impairment 1 Net (Loss) Earnings Cash Flow Total Assets Gold Salobo $ 186,400 $ 57,317 $ 54,363 $ 74,720 $ - $ 74,720 $ 134,254 $ 2,651,697 Sudbury 2 16,107 4,948 10,135 1,024 - 1,024 11,215 356,328 Constancia 13,057 3,968 3,583 5,506 - 5,506 9,089 113,964 San Dimas 28,731 13,132 6,747 8,852 - 8,852 18,000 201,448 Stillwater 8,087 1,440 3,195 3,452 - 3,452 6,647 233,233 Other 3 16,888 5,029 4,113 7,746 - 7,746 12,237 17,246 Total gold interests $ 269,270 $ 85,834 $ 82,136 $ 101,300 $ - $ 101,300 $ 191,442 $ 3,573,916 Silver Peñasquito $ 31,883 $ 8,739 $ 6,359 $ 16,785 $ - $ 16,785 $ 23,143 $ 382,363 Antamina 37,274 7,418 21,310 8,546 - 8,546 29,857 688,767 Constancia 18,490 7,153 9,095 2,242 - 2,242 11,337 237,136 Other 4 42,827 18,406 5,969 18,452 - 18,452 25,036 496,675 Total silver interests $ 130,474 $ 41,716 $ 42,733 $ 46,025 $ - $ 46,025 $ 89,373 $ 1,804,941 Palladium Stillwater $ 14,771 $ 2,621 $ 4,916 $ 7,234 $ - $ 7,234 $ 12,150 $ 254,772 Cobalt Voisey’s Bay $ - $ - $ - $ - $ 165,912 $ (165,912 ) $ - $ 227,510 Total mineral stream interests $ 414,515 $ 130,171 $ 129,785 $ 154,559 $ 165,912 $ (11,353 ) $ 292,965 $ 5,861,139 Other General and administrative $ (28,784 ) $ (33,900 ) Finance costs (27,252 ) (26,074 ) Other (2,824 ) (1,954 ) Income tax recovery 2,868 (3,585 ) Total other $ (55,992 ) $ (65,513 ) $ 379,684 Consolidated $ (67,345 ) $ 227,452 $ 6,240,823 1) See Note 11 for more information. 2) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 3) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating 777 gold interest and the non-operating 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Aljustrel, and 777 silver interests and the non-operating Six Months Ended June 30, 2018 (in thousands) Sales Cost of Sales Depletion Net Earnings Cash Flow From Operations Total Assets Gold Salobo $ 165,162 $ 50,152 $ 48,418 $ 66,592 $ 115,010 $ 2,760,314 Sudbury 1 12,679 3,834 7,622 1,223 8,968 372,366 Constancia 7,168 2,168 2,026 2,974 5,001 120,025 San Dimas 4,733 2,243 2,079 411 2,490 218,158 Other 2 17,097 4,991 4,868 7,238 11,001 26,950 Total gold interests $ 206,839 $ 63,388 $ 65,013 $ 78,438 $ 142,470 $ 3,497,813 Silver San Dimas 3 $ 40,594 $ 10,549 $ 3,575 $ 26,470 $ 30,045 $ - Peñasquito 45,935 11,568 8,198 26,169 34,367 395,052 Antamina 47,506 9,496 24,659 13,351 38,010 732,979 Constancia 16,406 5,807 7,030 3,569 10,599 254,773 Other 4 54,372 18,186 11,284 24,902 36,037 511,851 Total silver interests $ 204,813 $ 55,606 $ 54,746 $ 94,461 $ 149,058 $ 1,894,655 Cobalt Voisey’s Bay $ - $ - $ - $ - $ - $ 393,327 Total mineral stream interests $ 411,652 $ 118,994 $ 119,759 $ 172,899 $ 291,528 $ 5,785,795 Other General and administrative $ (21,729 ) $ (17,918 ) Finance costs (14,474 ) (14,567 ) Gain on disposal of San Dimas SPA 3 245,715 — Other 145 1,595 Income tax recovery 3,709 (98 ) Total other $ 213,366 $ (30,988 ) $ 430,317 Consolidated $ 386,265 $ 260,540 $ 6,216,112 1) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests as well as the non-operating 2) Where a gold interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the gold interest has been summarized under Other gold interests. Other gold interests are comprised of the operating Minto and 777 gold interests and the non-operating 3) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the new San Dimas PMPA. 4) Where a silver interest represents less than 10% of the Company’s sales, gross margin or aggregate asset book value and is not evaluated on a regular basis by the Company’s CEO for the purpose of assessing performance, the silver interest has been summarized under Other silver interests. Other silver interests are comprised of the operating Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Neves-Corvo, Minto, and 777 silver interests, the non-operating
Schedule of Company's Geographical Information	The Company’s geographical information, which is based on the location of the mining operations to which the mineral stream interests relate, are summarized in the tables below: Sales Carrying Amount at June 30, 2019 (in thousands) Three Months Jun 30, 2019 Six Months Jun 30, 2019 Gold Interests Silver Interests Palladium Interests Cobalt Interests Total North America Canada $ 20,390 11 % $ 36,642 9 % $ 373,575 $ 32,861 $ - $ 227,510 $ 633,946 11 % United States 11,648 6 % 22,858 5 % 233,232 557 254,772 - 488,561 8 % Mexico 27,573 15 % 61,595 15 % 201,446 383,702 - - 585,148 10 % Europe Greece 3,637 2 % 4,905 1 % - 4,356 - - 4,356 0 % Portugal 6,127 3 % 16,347 4 % - 21,848 - - 21,848 0 % Sweden 5,080 3 % 8,642 2 % - 36,495 - - 36,495 1 % South America Argentina/Chile 1 - 0 % - 0 % - 264,401 - - 264,401 5 % Brazil 76,329 40 % 186,400 45 % 2,651,699 - - - 2,651,699 45 % Peru 38,682 20 % 77,126 19 % 113,964 1,060,721 - - 1,174,685 20 % Consolidated $ 189,466 100 % $ 414,515 100 % $ 3,573,916 $ 1,804,941 $ 254,772 $ 227,510 $ 5,861,139 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile. Sales Carrying Amount at June 30, 2018 (in thousands) Three Months Jun 30, 2018 Six Months Ended Jun 30, 2018 Gold Interests Silver Interests Palladium Interests Cobalt Interests Total North America Canada $ 15,448 7 % $ 33,917 8 % $ 399,317 $ 35,546 $ - $ 393,327 $ 828,190 14 % United States - 0 % - 0 % - 433 - - 433 0 % Mexico 48,285 23 % 92,693 23 % 218,158 396,458 - - 614,616 10 % Europe Greece 2,763 1 % 5,248 1 % - 7,108 - - 7,108 0 % Portugal 2,916 1 % 5,718 1 % - 23,141 - - 23,141 0 % Sweden 4,882 2 % 11,316 3 % - 38,623 - - 38,623 1 % South America Argentina/Chile 1 1,723 2 % 4,419 1 % - 264,411 - - 264,411 5 % Brazil 92,327 43 % 165,162 40 % 2,760,314 - - - 2,760,314 48 % Peru 44,056 21 % 93,179 23 % 120,024 1,128,935 - - 1,248,959 22 % Consolidated $ 212,400 100 % $ 411,652 100 % $ 3,497,813 $ 1,894,655 $ - $ 393,327 $ 5,785,795 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile.

Description of Business and N_2

Description of Business and Nature of Operations - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019AgreementAsset
Description of business and nature of operations [abstract]
Number of long-term purchase agreements | Agreement	23
Number of early deposit long-term purchase agreements | Agreement	3
Number of mining companies engaged in precious metal purchase agreements | Agreement	17
Number of currently operating mining assets	19
Number of mining assets under various stages of development	9
Number of countries operating mining assets	11
Number of mining assets placed in care and maintenance	2

Significant Accounting Polici_3

Significant Accounting Policies - Additional Information (Detail) $ in Thousands	Jan. 01, 2019USD ($)	Jun. 30, 2019USD ($)
Disclosure of significant accounting policies [line items]
Lease libilities		$ 4,480
Adoption of IFRS 16 [member]
Disclosure of significant accounting policies [line items]
Number Of Leases	2
Right of uses assets	$ 5,000
Lease libilities	$ 4,679

Significant Accounting Polici_4

Significant Accounting Policies - Schedule of Lease Liability (Detail) - USD ($) $ in Thousands	Jan. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
Disclosure of significant accounting policies [line items]
Lease commitment			$ 3,785
Current portion		$ 647
Long-term portion		3,833
Lease liability		4,480
Adoption of IFRS 16 [member]
Disclosure of significant accounting policies [line items]
Extension option reasonably certain to be exercised 1	$ 1,530
Less: Discounting using the incremental borrowing rate 2	(636)
Current portion	679
Long-term portion	4,000
Lease liability	$ 4,679
Not later than 1 year [member]
Disclosure of significant accounting policies [line items]
Lease commitment			789
Lease liability		647
Later than one year and not later than five years [member]
Disclosure of significant accounting policies [line items]
Lease commitment			2,772
Lease liability		3,066
Later than 5 years [member]
Disclosure of significant accounting policies [line items]
Lease commitment			$ 224
Lease liability		$ 767

Significant Accounting Polici_5

Significant Accounting Policies - Schedule of Lease Liability (Parenthetical) (Detail) - Adoption of IFRS 16 [member]	Jan. 01, 2019
Disclosure of significant accounting policies [line items]
Extension Period	5 years
Bottom of range [member]
Disclosure of significant accounting policies [line items]
Estimated incremental borrowing rate	3.9764%
Top of range [member]
Disclosure of significant accounting policies [line items]
Estimated incremental borrowing rate	4.334%

Key Sources of Estimation Unc_2

Key Sources of Estimation Uncertainty and Critical Accounting Judgments - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of key sources of estimation uncertainty [line items]
Mineral stream interests	$ 5,861,139,000	$ 6,156,839,000
Kutcho Copper Corp [member]
Disclosure of key sources of estimation uncertainty [line items]
Percentage of ownership interest in associate	11.00%
Minto derivative liability [member] | Consensus pricing [member]
Disclosure of key sources of estimation uncertainty [line items]
Analyst consensus copper price per pound exceeds	$ 2.50

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value by Level within Fair Value Hierarchy (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	$ 87,182	$ 125,781	$ 75,767	$ 92,661	$ 115,568	$ 98,521
Trade receivables from provisional concentrate sales, net of fair value adjustment	98		1,332
Long-term investments - common shares held	216,319		164,753	$ 261,159
Long-term investments - warrants held	9
Convertible note receivable	11,836		12,899
Total net financial assets measured at fair value	315,444		254,751
Investments in equity instruments designated at fair value through other comprehensive income [member]
Disclosure of fair value measurement of assets [line items]
Long-term investments - common shares held	216,319		164,753
Level 1 [member]
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	87,182		75,767
Total net financial assets measured at fair value	303,501		240,520
Level 1 [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]
Disclosure of fair value measurement of assets [line items]
Long-term investments - common shares held	216,319		164,753
Level 2 [member]
Disclosure of fair value measurement of assets [line items]
Trade receivables from provisional concentrate sales, net of fair value adjustment	98		1,332
Long-term investments - warrants held	9
Total net financial assets measured at fair value	107		1,332
Level 3 [member]
Disclosure of fair value measurement of assets [line items]
Convertible note receivable	11,836		12,899
Total net financial assets measured at fair value	$ 11,836		$ 12,899

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Non convertible debt interest rate	18.00%
Volatility rate	30.00%
Non convertible debt interest rate, fluctuation	1.00%
Effect of one percent change in interest rates on fair value of convertible debt	$ 800,000
Minto derivative liability [member]
Disclosure of detailed information about financial instruments [line items]
Minimum market price of copper before Minto top up payment is required	2.50	$ 2.50
Fair value of Minto derivative liability	$ 0	$ 0

Revenue - Summary of Revenue (D

Revenue - Summary of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue [abstract]
Gold credit sales	$ 117,873	$ 110,688	$ 263,991	$ 201,545
Concentrate sales	997	3,065	5,279	5,294
Revenue from sale of gold	118,870	113,753	269,270	206,839
Silver credit sales	48,446	87,620	100,097	182,109
Concentrate sales	14,867	11,027	30,377	22,704
Revenue from sale of silver	63,313	98,647	130,474	204,813
Palladium credit sales	7,283		14,771
Total sales revenue	$ 189,466	$ 212,400	$ 414,515	$ 411,652
Gold
Gold credit sales	62.00%	52.00%	64.00%	49.00%
Concentrate sales	1.00%	2.00%	1.00%	1.00%
Revenue from sale	63.00%	54.00%	65.00%	50.00%
Silver
Silver credit sales	25.00%	41.00%	24.00%	44.00%
Concentrate sales	8.00%	5.00%	7.00%	6.00%
Revenue from sale	33.00%	46.00%	31.00%	50.00%
Palladium
Palladium credit sales	4.00%	0.00%	4.00%	0.00%
Total sales revenue	100.00%	100.00%	100.00%	100.00%

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - Contract	Jun. 30, 2019	Dec. 31, 2018
Revenue [abstract]
Number of forward contracts outstanding	0	0

General and Administrative - Su

General and Administrative - Summary of General and Administrative Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Salaries and benefits
Salaries and benefits, excluding PSUs	$ 3,771	$ 3,458	$ 7,668	$ 7,049
PSUs	2,417	3,316	9,541	3,499
Total salaries and benefits	6,188	6,774	17,209	10,548
Depreciation	467	233	960	473
Donations	333	439	809	1,138
Professional fees	970	515	1,333	1,876
Other	2,835	2,617	5,660	5,051
General and administrative before equity settled stock based compensation	10,793	10,578	25,971	19,086
Total equity settled stock based compensation	1,456	1,394	2,813	2,643
Total general and administrative	12,249	11,972	28,784	21,729
Employee stock options [member]
Salaries and benefits
Total equity settled stock based compensation	642	584	1,210	1,235
Restricted stock units [member]
Salaries and benefits
Total equity settled stock based compensation	$ 814	$ 810	$ 1,603	$ 1,408

General and Administrative - _2

General and Administrative - Summary of General and Administrative Expense (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Significant non cash charges [abstract]
Average performance factor used to calculate the accrual related to the anticipated fair value of the PSUs issue	181.00%	83.00%	181.00%	83.00%

Other (Income) Expense - Summar

Other (Income) Expense - Summary of Other (Income) Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of other income (expense) [abstract]
Interest income	$ (274)	$ (279)	$ (500)	$ (462)
Dividends received	(23)	(18)	(39)	(39)
Guarantee fees - Primero Revolving Credit Facility		(858)		(858)
Fees for contract amendments and reconciliations				(248)
Share of losses of associate			62	201
Impairment loss - investment in associate	1,649		1,649
Foreign exchange loss (gain)	146	26	819	(144)
Loss on fair value adjustment of share purchase warrants held	7	12	7	111
(Gain) loss on fair value adjustment of Kutcho Convertible Note	1,934	(99)	1,063	1,290
Other	(349)		(237)	4
Total other (income) expense	$ 3,090	$ (1,216)	$ 2,824	$ (145)

Accounts Receivable - Summary o

Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Trade and other receivables [abstract]
Trade receivables from provisional concentrate sales, net of fair value adjustment	$ 98	$ 1,332
Other accounts receivable	1,226	854
Total accounts receivable	$ 1,324	$ 2,186

Mineral Stream Interests - Sche

Mineral Stream Interests - Schedule of Mineral Stream Interests (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disclosure Of Mineral Stream Interests [line items]
Ending balance	$ 5,861,139	$ 5,785,795	$ 5,861,139	$ 5,785,795
Depletion	61,404	62,494	129,785	119,759
Impairment loss	165,912		165,912
Voisey's Bay [member]
Disclosure Of Mineral Stream Interests [line items]
Impairment loss	165,912		165,912
Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			3,656,056
Ending balance	3,573,916	3,497,813	3,573,916	3,497,813	$ 3,656,056
Depletion	37,856	35,780	82,136	65,013
Gold interests [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			366,463
Ending balance	356,328		356,328		366,463
Gold interests [member] | Salobo [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			2,706,060
Ending balance	2,651,697		2,651,697		2,706,060
Gold interests [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			117,547
Ending balance	113,964		113,964		117,547
Gold interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			208,195
Ending balance	201,448		201,448		208,195
Gold interests [member] | Stillwater [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			236,432
Ending balance	233,233		233,233		236,432
Gold interests [member] | Other gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			21,359
Ending balance	17,246		17,246		21,359
Gold interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			4,681,816	4,222,030	4,222,030
Additions			(4)		459,786
Ending balance	4,681,812		4,681,812		4,681,816
Gold interests [member] | Cost [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			623,864	623,864	623,864
Ending balance	623,864		623,864		623,864
Gold interests [member] | Cost [member] | Salobo [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			3,059,876	3,059,876	3,059,876
Ending balance	3,059,876		3,059,876		3,059,876
Gold interests [member] | Cost [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			136,058	136,058	136,058
Ending balance	136,058		136,058		136,058
Gold interests [member] | Cost [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			220,429
Additions					220,429
Ending balance	220,429		220,429		220,429
Gold interests [member] | Cost [member] | Stillwater [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			239,357
Additions			(4)		239,357
Ending balance	239,353		239,353		239,357
Gold interests [member] | Cost [member] | Other gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			402,232	402,232	402,232
Ending balance	402,232		402,232		402,232
Gold interests [member] | Accumulated Depletion & Impairment [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(1,025,760)	(879,441)	(879,441)
Ending balance	(1,107,896)		(1,107,896)		(1,025,760)
Depletion			(82,136)		(146,319)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(257,401)	(243,876)	(243,876)
Ending balance	(267,536)		(267,536)		(257,401)
Depletion			(10,135)		(13,525)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Salobo [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(353,816)	(251,144)	(251,144)
Ending balance	(408,179)		(408,179)		(353,816)
Depletion			(54,363)		(102,672)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(18,511)	(14,007)	(14,007)
Ending balance	(22,094)		(22,094)		(18,511)
Depletion			(3,583)		(4,504)
Gold interests [member] | Accumulated Depletion & Impairment [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(12,234)
Ending balance	(18,981)		(18,981)		(12,234)
Depletion			(6,747)		(12,234)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Stillwater [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(2,925)
Ending balance	(6,120)		(6,120)		(2,925)
Depletion			(3,195)		(2,925)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Other gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(380,873)	(370,414)	(370,414)
Ending balance	(384,986)		(384,986)		(380,873)
Depletion			(4,113)		(10,459)
Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			1,847,668
Ending balance	1,804,941	1,894,655	1,804,941	1,894,655	1,847,668
Depletion	21,070	26,714	42,733	54,746
Silver interests [member] | Penasquito [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			388,722
Ending balance	382,363		382,363		388,722
Silver interests [member] | Antamina [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			710,077
Ending balance	688,767		688,767		710,077
Silver interests [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			246,231
Ending balance	237,136		237,136		246,231
Silver interests [member] | Other silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			502,638
Ending balance	496,675		496,675		502,638
Silver interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			3,010,956	3,201,085	3,201,085
Additions			6		202
Ending balance	3,010,962		3,010,962		3,010,956
Disposal					(190,331)
Silver interests [member] | Cost [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance				190,331	190,331
Disposal					(190,331)
Silver interests [member] | Cost [member] | Penasquito [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			524,626	524,626	524,626
Ending balance	524,626		524,626		524,626
Silver interests [member] | Cost [member] | Antamina [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			900,343	900,343	900,343
Ending balance	900,343		900,343		900,343
Silver interests [member] | Cost [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			302,948	302,948	302,948
Ending balance	302,948		302,948		302,948
Silver interests [member] | Cost [member] | Other silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			1,283,039	1,282,837	1,282,837
Additions			6		202
Ending balance	1,283,045		1,283,045		1,283,039
Silver interests [member] | Accumulated Depletion & Impairment [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(1,163,288)	(1,120,397)	(1,120,397)
Ending balance	(1,206,021)		(1,206,021)		(1,163,288)
Depletion			(42,733)		(101,935)
Disposal					59,044
Silver interests [member] | Accumulated Depletion & Impairment [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance				(55,469)	(55,469)
Depletion					(3,575)
Disposal					59,044
Silver interests [member] | Accumulated Depletion & Impairment [member] | Penasquito [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(135,904)	(121,376)	(121,376)
Ending balance	(142,263)		(142,263)		(135,904)
Depletion			(6,359)		(14,528)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Antamina [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(190,266)	(142,705)	(142,705)
Ending balance	(211,576)		(211,576)		(190,266)
Depletion			(21,310)		(47,561)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(56,717)	(41,145)	(41,145)
Ending balance	(65,812)		(65,812)		(56,717)
Depletion			(9,095)		(15,572)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Other silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(780,401)	(759,702)	(759,702)
Ending balance	(786,370)		(786,370)		(780,401)
Depletion			(5,969)		(20,699)
Palladium interest [member]
Disclosure Of Mineral Stream Interests [line items]
Ending balance	254,772		254,772
Palladium interest [member] | Stillwater [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			259,693
Ending balance	254,772		254,772		259,693
Palladium interest [member] | Cost [member] | Stillwater [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			263,726
Additions			(5)		263,726
Ending balance	263,721		263,721		263,726
Palladium interest [member] | Accumulated Depletion & Impairment [member] | Stillwater [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(4,033)
Ending balance	(8,949)		(8,949)		(4,033)
Depletion			(4,916)		(4,033)
Cobalt Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Ending balance	227,510	393,327	227,510	393,327
Cobalt Interests [member] | Voisey's Bay [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			393,422
Ending balance	227,510		227,510		393,422
Cobalt Interests [member] | Cost [member] | Voisey's Bay [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			393,422
Additions					393,422
Ending balance	393,422		393,422		393,422
Cobalt Interests [member] | Accumulated Depletion & Impairment [member] | Voisey's Bay [member]
Disclosure Of Mineral Stream Interests [line items]
Ending balance	(165,912)		(165,912)
Impairment loss			(165,912)
Mineral Stream Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			6,156,839
Ending balance	5,861,139		5,861,139		6,156,839
Depletion	61,404	$ 62,494	129,785	119,759
Impairment loss	165,912		165,912
Mineral Stream Interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			8,349,920	7,423,115	7,423,115
Additions			(3)		1,117,136
Ending balance	8,349,917		8,349,917		8,349,920
Disposal					(190,331)
Mineral Stream Interests [member] | Accumulated Depletion & Impairment [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(2,193,081)	$ (1,999,838)	(1,999,838)
Ending balance	$ (2,488,778)		(2,488,778)		(2,193,081)
Depletion			(129,785)		(252,287)
Impairment loss			$ (165,912)
Disposal					$ 59,044

Mineral Stream Interests - Sc_2

Mineral Stream Interests - Schedule of Mineral Stream Interests (Parenthetical) (Detail) - Accumulated impairment [member] - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Gold interests [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges	$ 120	$ 120
Gold interests [member] | 777 [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges	151	151
Silver interests [member] | Keno Hill [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges	11	11
Silver interests [member] | Pascua-Lama [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges	338	338
Silver interests [member] | 777 [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges	64	$ 64
Voisey's Bay [member] | Cobalt Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges	$ 166

Mineral Stream Interests - Clas

Mineral Stream Interests - Classification of Mining Interest (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	$ 2,851,375	$ 2,920,085
Non-Depletable	722,541	735,971
Total	3,573,916	3,656,056
Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	951,057	956,242
Non-Depletable	853,884	891,426
Total	1,804,941	1,847,668
Mineral Stream Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	4,045,720	4,124,626
Non-Depletable	1,815,419	2,032,213
Total	5,861,139	6,156,839
Voisey's Bay [member] | Cobalt Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Non-Depletable	227,510	393,422
Total	227,510	393,422
Stillwater [member] | Palladium interest [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	243,288	248,299
Non-Depletable	11,484	11,394
Total	254,772	259,693
Penasquito [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	295,153	284,194
Non-Depletable	87,210	104,528
Total	382,363	388,722
Antamina [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	342,105	353,679
Non-Depletable	346,662	356,398
Total	688,767	710,077
Constancia [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	221,123	230,983
Non-Depletable	16,013	15,248
Total	237,136	246,231
Other silver interests [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	92,676	87,386
Non-Depletable	403,999	415,252
Total	496,675	502,638
Sudbury [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	303,126	308,041
Non-Depletable	53,202	58,422
Total	356,328	366,463
Salobo [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	2,125,107	2,171,292
Non-Depletable	526,590	534,768
Total	2,651,697	2,706,060
Constancia [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	104,821	108,403
Non-Depletable	9,143	9,144
Total	113,964	117,547
San Dimas [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	94,674	101,421
Non-Depletable	106,774	106,774
Total	201,448	208,195
Stillwater [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	206,401	209,569
Non-Depletable	26,832	26,863
Total	233,233	236,432
Other gold interests [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	17,246	21,359
Total	$ 17,246	$ 21,359

Mineral Stream Interests - Addi

Mineral Stream Interests - Additional Information (Detail) - San Dimas [member] $ in Thousands, oz in Millions	6 Months Ended
	Jun. 30, 2018USD ($)shares	Aug. 06, 2010oz	Oct. 15, 2004
Disclosure Of Mineral Stream Interests [line items]
Cash received	$ 220,000
Gain on disposal	$ 246,000
First Majestic [member]
Disclosure Of Mineral Stream Interests [line items]
Number of common shares received | shares	20,914,590
Fair value of First Majestic shares received	$ 151,000
Goldcorp Inc. [member]
Disclosure Of Mineral Stream Interests [line items]
Fee from Goldcorp in exchange for release from the guarantee of deliveries relative to San Dimas	$ 10,000
Silver [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable Production to be Purchased		100.00%	100.00%
Number of silver ounces to be delivered before sharing mechanism applies | oz		6
Attributable Payable Production to be Purchased there after		50.00%

Mineral Stream Interests - Disc

Mineral Stream Interests - Disclosure of Gain on Disposal of Mineral Stream Interest (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Disclosure Of Mineral Stream Interests [line items]
Gain on disposal	$ 245,715	$ 245,715
San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Cash received		220,000
Total net proceeds from the disposal of the San Dimas SPA		381,000
Less: carrying value plus closing costs		(135,285)
Gain on disposal		245,715
San Dimas [member] | First Majestic [member]
Disclosure Of Mineral Stream Interests [line items]
Fair value of First Majestic shares received		151,000
San Dimas [member] | Goldcorp Inc. [member]
Disclosure Of Mineral Stream Interests [line items]
Fee from Goldcorp in exchange for release from the guarantee of deliveries relative to San Dimas		$ 10,000

Impairment of Mineral Stream _3

Impairment of Mineral Stream Interests - Schedule of Impairment of Mineral Stream Interests (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Disclosure of Impairment Loss and Reversal of Impairment Loss [Line Items]
Total impairment charges	$ 165,912	$ 165,912
Voisey's Bay [member]
Disclosure of Impairment Loss and Reversal of Impairment Loss [Line Items]
Total impairment charges	$ 165,912	$ 165,912

Impairment of Mineral Stream _4

Impairment of Mineral Stream Interests - Additional Information (Detail) $ / shares in Units, $ in Thousands, lb in Millions	Jun. 11, 2018USD ($)lb	Jun. 30, 2019USD ($)$ / shares	Jun. 30, 2019USD ($)$ / shares	Jun. 18, 2019
Disclosure of Impairment Loss and Reversal of Impairment Loss [Line Items]
Impairment charge		$ 165,912	$ 165,912
Cobalt Twenty Seven [member] | Pala Investments Limited [member]
Disclosure of Impairment Loss and Reversal of Impairment Loss [Line Items]
Acquisition of issued and outstanding common shares of comparator company				100.00%
Voisey's Bay [member]
Disclosure of Impairment Loss and Reversal of Impairment Loss [Line Items]
Precious metal purchase agreement carrying value		393,000	393,000
Recoverable amount			227,000
Impairment charge		$ 165,912	$ 165,912
Discount rate		7.00%	7.00%
Market price of cobalt | $ / shares		$ 14.83	$ 14.83
Cobalt [member] | Voisey's Bay [member]
Disclosure of Impairment Loss and Reversal of Impairment Loss [Line Items]
Percentage of production to be acquired	42.40%
Amount of cobalt to be delivered | lb	31
Percentage of production to be acquired thereafter for life of mine	21.20%
Upfront cash payments	$ 390,000

Early Deposit Mineral Stream _3

Early Deposit Mineral Stream Interests - Summary of Early Deposit Mineral Stream Interests (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Disclosure Of Mineral Stream Interests [line items]
Upfront Consideration Paid to Date	$ 30,250
Upfront Consideration to be Paid	328,250
Total Upfront Consideration	$ 358,500
Cotabambas [member]
Disclosure Of Mineral Stream Interests [line items]
Name of mine owner	Panoro
Location of Mine	Peru
Upfront Consideration Paid to Date	$ 7,750
Upfront Consideration to be Paid	132,250
Total Upfront Consideration	$ 140,000
Gold	25.00%
Silver	100.00%
Term of Agreement	Life of Mine
Toroparu [member]
Disclosure Of Mineral Stream Interests [line items]
Name of mine owner	Sandspring
Location of Mine	Guyana
Upfront Consideration Paid to Date	$ 15,500
Upfront Consideration to be Paid	138,000
Total Upfront Consideration	$ 153,500
Gold	10.00%
Silver	50.00%
Term of Agreement	Life of Mine
Kutcho [member]
Disclosure Of Mineral Stream Interests [line items]
Name of mine owner	Kutcho
Location of Mine	Canada
Upfront Consideration Paid to Date	$ 7,000
Upfront Consideration to be Paid	58,000
Total Upfront Consideration	$ 65,000
Gold	100.00%
Silver	100.00%
Term of Agreement	Life of Mine

Early Deposit Mineral Stream _4

Early Deposit Mineral Stream Interests - Summary of Early Deposit Mineral Stream Interests (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2019oz
Cotabambas [member]
Disclosure Of Mineral Stream Interests [line items]
Percentage of silver production at the mine which WPM is entitled to after step down	66.67%
Percentage of gold production at the mine which WPM is entitled to after step down	16.67%
Kutcho [member]
Disclosure Of Mineral Stream Interests [line items]
Percentage of silver production at the mine which WPM is entitled to after step down	66.67%
Percentage of gold production at the mine which WPM is entitled to after step down	66.67%
Gold [member] | Kutcho [member]
Disclosure Of Mineral Stream Interests [line items]
Gold ounces to be delivered before entitlement step down takes effect	51,000
Silver [member] | Cotabambas [member]
Disclosure Of Mineral Stream Interests [line items]
Silver Equivalent ounces to be delivered before entitlement step down takes effect	90,000,000
Silver [member] | Kutcho [member]
Disclosure Of Mineral Stream Interests [line items]
Silver ounces to be delivered before entitlement step down takes effect	5,600,000

Mineral Royalty Interest - Addi

Mineral Royalty Interest - Additional Information (Detail) - Metates Properties [member] - USD ($)	Aug. 07, 2019	Aug. 07, 2014	Jun. 30, 2019
Disclosure Of Royalty Arrangements [line items]
Net smelter return royalty percentage	0.50%	1.50%
Upfront cash payment for Royalty interest	$ 9,000,000	$ 9,000,000
Ratio of royalty which may be reacquired by the Mine Operator	66.66%
Net smelter return royalty percentage which may be repurchased	1.00%
Total consideration owed by Mine Operator upon election of reacquisition of royalty interest	$ 9,000,000
Revenues recognized in royalty agreement			$ 0
Depletion in royalty agreement			$ 0

Investment in Associate - Addit

Investment in Associate - Additional Information (Detail) $ in Thousands, $ in Millions	Jun. 06, 2019CAD ($)shares	Jun. 30, 2019USD ($)shares	Jun. 30, 2019USD ($)shares
Disclosure of associates and joint ventures [line items]
Total consideration		$ 132	$ 132
Impairment charge		1,649	1,649
Kutcho [member]
Disclosure of associates and joint ventures [line items]
Total consideration		132
Recoverable amount of investment		1,000	1,000
Impairment charge		$ 1,649	$ 1,649
Investment in warrants [member] | Kutcho [member]
Disclosure of associates and joint ventures [line items]
Number of common shares and warrants acquired | shares	1,000,000
Number of shares of associate owned | shares	4,076,923
Equity investment [member] | Kutcho [member]
Disclosure of associates and joint ventures [line items]
Number of share purchase warrants of associate acquired | shares	1,000,000
Total consideration	$ 0.2
Number of share purchase warrants of associate owned | shares	7,153,846
Amount advanced in exchange for convertible note receivable	$ 20
Coupon rate on convertible note receivable	10.00%
Number of shares issued and outstanding by associate | shares		68,247,628	68,247,628
Undiluted ownership percentage of associate			10.00%
Fully diluted ownership percentage of associate			29.00%
Non-fully diluted potential ownership percentage of associate			37.00%

Investment in Associate - Discl

Investment in Associate - Disclosure of Investment in Associate (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Disclosure of associates and joint ventures [line items]
Beginning Balance		$ 2,562	$ 2,562
Amount invested	$ 132		132
Share of losses			(62)		$ (201)
Impairment	(1,649)		(1,649)
Ending Balance	984		984	$ 2,562
Kutcho [member]
Disclosure of associates and joint ventures [line items]
Beginning Balance	2,501	2,563	2,563	2,794	2,995
Amount invested	132
Share of losses		(62)		(231)	(201)
Impairment	(1,649)		(1,649)
Ending Balance	$ 984	$ 2,501	$ 984	$ 2,563	$ 2,794

Convertible Note Receivable - A

Convertible Note Receivable - Additional Information (Detail) $ / shares in Units, $ in Thousands, $ in Millions	Dec. 14, 2017USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 14, 2017CAD ($)$ / shares
Convertible note receivable [line items]
Convertible note receivable | $		$ 11,836	$ 12,899
Convertible note receivable [member] | Kutcho [member]
Convertible note receivable [line items]
Convertible note receivable	$ 16,000			$ 20
Coupon rate on convertible note receivable	10.00%			10.00%
Convertible note original term to maturity	7 year
Maximum interest payment deferral period	4 years
Option to defer interest payment criteria	Kutcho has the option to defer the first three interest payments until December 31, 2019, at which point one half of the deferred interest is payable in cash and the other half of the deferred interest can, at Kutcho's option, either (i) be paid in cash; or (ii) be deferred for an additional period not to exceed 4 years.
Conversion price per share | $ / shares				$ 0.8125
Minimum period required for early repayment	24 months
Prepayment cash penalty as a percentage of the outstanding loan amount if pre-paid on or after 24 months until 36 months	25.00%			25.00%
Loan amount outstanding period for covering 25% of prepayment penalty	After 24 months until 36 months
Prepayment cash penalty as a percentage of the outstanding loan amount if pre-paid on or after 36 months until 60 months	20.00%			20.00%
Loan amount outstanding period for covering 20% of prepayment penalty	After 36 months until 60 months
Prepayment cash penalty as a percentage of the outstanding loan amount if pre-paid on or after 60 months until maturity	15.00%			15.00%
Loan amount outstanding period for covering 15% of prepayment penalty	After 60 months until maturity

Convertible Note Receivable - S

Convertible Note Receivable - Schedule of Company's Convertible Note Receivable (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018
Convertible note receivable [abstract]
Beginning balance				$ 15,777
Fair value gain (loss) reflected in net earnings	$ (1,934)	$ 871	$ 99	(1,388)	$ (1,589)
Ending balance	$ 11,836	$ 13,770	$ 14,488	$ 14,389	$ 12,899

Long-Term Equity Investments -

Long-Term Equity Investments - Summary of Long-Term Equity Investments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Long term investments 1 [abstract]
Long-term investments - common shares held	$ 216,319	$ 164,753	$ 261,159
Long-term investments - warrants held	9
Total long-term equity investments	$ 216,328	$ 164,753

Long-Term Equity Investments _2

Long-Term Equity Investments - Summary of Common Shares Held (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Long term investments - common shares held [line items]
Fair value	$ 216,319	$ 261,159	$ 216,319	$ 261,159	$ 164,753
Fair value adjustment gains (losses) included in OCI	$ 30,026	16,663	$ 50,673	13,534
Bear Creek [member]
Long term investments - common shares held [line items]
Shares owned	13,264,305		13,264,305
Percentage of Outstanding Shares Owned	13.00%		13.00%
Fair value	$ 16,825	17,829	$ 16,825	17,829	10,112
Fair value adjustment gains (losses) included in OCI	$ 2,531	(5,831)	$ 6,713	(3,528)
Sabina [member]
Long term investments - common shares held [line items]
Shares owned	11,700,000		11,700,000
Percentage of Outstanding Shares Owned	4.00%		4.00%
Fair value	$ 11,890	13,505	$ 11,890	13,505	10,549
Fair value adjustment gains (losses) included in OCI	$ 902	(831)	$ 1,341	(7,665)
Arizona Mining [member]
Long term investments - common shares held [line items]
Fair value		46,780		46,780
Fair value adjustment gains (losses) included in OCI		15,370		19,199
First Majestic [member]
Long term investments - common shares held [line items]
Shares owned	20,914,590		20,914,590
Percentage of Outstanding Shares Owned	10.00%		10.00%
Fair value	$ 165,434	159,578	$ 165,434	159,578	123,187
Fair value adjustment gains (losses) included in OCI	27,816	8,578	42,247	8,578
Other investments [member]
Long term investments - common shares held [line items]
Fair value	22,170	23,467	22,170	23,467	$ 20,905
Fair value adjustment gains (losses) included in OCI	$ (1,223)	$ (623)	$ 372	$ (3,050)

Property Plant and Equipment -

Property Plant and Equipment - Summary of Property Plant and Equipment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Statement [LineItems]
Balance-January 1, 2019	$ 3,626
Balance-June 30, 2019	7,621
Accumulated depreciation [member]
Statement [LineItems]
Balance-January 1, 2019	(4,070)
Disposals	36
Depreciation	(837)
Balance-June 30, 2019	(4,871)
At cost [member]
Statement [LineItems]
Balance-January 1, 2019	7,696
Additions upon adoption of IFRS 16	4,679
Additions	153
Disposals	36
Balance-June 30, 2019	12,492
Leasehold improvements [member]
Statement [LineItems]
Balance-June 30, 2019	2,107
Leasehold improvements [member] | Accumulated depreciation [member]
Statement [LineItems]
Balance-January 1, 2019	(2,024)
Disposals	7
Depreciation	(252)
Balance-June 30, 2019	(2,269)
Leasehold improvements [member] | At cost [member]
Statement [LineItems]
Balance-January 1, 2019	4,378
Additions	5
Disposals	7
Balance-June 30, 2019	4,376
Right-of-use assets [member]
Statement [LineItems]
Balance-June 30, 2019	4,316
Right-of-use assets [member] | Accumulated depreciation [member]
Statement [LineItems]
Depreciation	(363)
Balance-June 30, 2019	(363)
Right-of-use assets [member] | At cost [member]
Statement [LineItems]
Additions upon adoption of IFRS 16	4,679
Balance-June 30, 2019	4,679
Other property, plant and equipment [member]
Statement [LineItems]
Balance-June 30, 2019	1,197
Other property, plant and equipment [member] | Accumulated depreciation [member]
Statement [LineItems]
Balance-January 1, 2019	(2,046)
Disposals	29
Depreciation	(222)
Balance-June 30, 2019	(2,240)
Other property, plant and equipment [member] | At cost [member]
Statement [LineItems]
Balance-January 1, 2019	3,318
Additions	148
Disposals	29
Balance-June 30, 2019	$ 3,437

Credit Facilities - Bank Debt (

Credit Facilities - Bank Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Disclosure Of Bank Debt Facilities
Gross bank debt outstanding 1	$ 1,095,500	$ 1,264,000
Revolving Term Loan [member]
Disclosure Of Bank Debt Facilities
Current portion	0	0
Long-term portion	1,095,500	1,264,000
Gross bank debt outstanding 1	$ 1,095,500	$ 1,264,000

Credit Facilities - Bank Debt_2

Credit Facilities - Bank Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Disclosure Of Bank Debt Facilities
Unamortized debt issue	$ 5,883	$ 5,507
Revolving Term Loan [member]
Disclosure Of Bank Debt Facilities
Unamortized debt issue	$ 6,000

Credit Facilities - Additional

Credit Facilities - Additional Information (Detail) $ in Thousands, $ in Millions	Feb. 27, 2019USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Mar. 15, 2018CAD ($)	Mar. 15, 2017CAD ($)	Mar. 15, 2016CAD ($)
Disclosure Of Bank Debt Facilities
Amount		$ 1,095,500	$ 1,264,000
Revolving Term Loan [member]
Disclosure Of Bank Debt Facilities
Information about covenants imposed by lenders on credit facilities		The Company's Revolving Facility has financial covenants which require the Company to maintain (i) a net debt to tangible net worth ratio of less than or equal to 0.751; and (ii) an interest coverage ratio of greater than or equal to 3.001. Only cash interest expenses are included for the purposes of calculating the interest coverage ratio. The Company is in compliance with these debt covenants as at June 30, 2019.
Maximum net debt to tangible net worth ratio		75.00%
Minimum interest coverage ratio		3
Amount		$ 1,095,500	$ 1,264,000
Revolving Term Loan [member] | Extension of revolving term loan [member]
Disclosure Of Bank Debt Facilities
Credit facility extension fees	$ 1,000
Maximum available credit under revolving term loan		$ 2,000,000
Revolving Term Loan [member] | Bottom of range [member]
Disclosure Of Bank Debt Facilities
Stand-by fees rate charged for undrawn facilities		0.24%
Revolving Term Loan [member] | Bottom of range [member] | LIBOR [member]
Disclosure Of Bank Debt Facilities
Basis spread		1.20%
Revolving Term Loan [member] | Bottom of range [member] | Bank of Nova Scotia Base Rate [member]
Disclosure Of Bank Debt Facilities
Basis spread		0.20%
Revolving Term Loan [member] | Top of range [member]
Disclosure Of Bank Debt Facilities
Stand-by fees rate charged for undrawn facilities		0.44%
Revolving Term Loan [member] | Top of range [member] | LIBOR [member]
Disclosure Of Bank Debt Facilities
Basis spread		2.20%
Revolving Term Loan [member] | Top of range [member] | Bank of Nova Scotia Base Rate [member]
Disclosure Of Bank Debt Facilities
Basis spread		1.20%
Letter of Guarantee in favour of Her Majesty the Queen in Right of Canada [member]
Disclosure Of Bank Debt Facilities
Annual fee associated with Letter of Credit		1.00%
Amount				$ 10	$ 11	$ 192
Letter of credit, cancellation date		Dec. 18, 2018

Credit Facilities - Summary of

Credit Facilities - Summary of Lease Liabilities (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Presentation of leases for lessee [abstract]
Current portion	$ 647
Long-term portion	3,833
Total lease liability	$ 4,480

Credit Facilities - Summary o_2

Credit Facilities - Summary of Lease Maturities (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Disclosure of finance lease and operating lease by lessee [line items]
Lease liability	$ 4,480
Not later than 1 year [member]
Disclosure of finance lease and operating lease by lessee [line items]
Lease liability	647
Later than one year and not later than five years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Lease liability	3,066
Later than 5 years [member]
Disclosure of finance lease and operating lease by lessee [line items]
Lease liability	$ 767

Credit Facilities - Summary o_3

Credit Facilities - Summary of Company's Finance Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of Finance Cost [abstract]
Average principle outstanding during period	$ 1,165,994	$ 657,144	$ 1,195,591	$ 687,516
Average effective interest rate during period	4.25%	3.44%	4.27%	3.27%
Total interest expense incurred during period	$ 12,388	$ 5,659	$ 25,508	$ 11,249
Costs related to undrawn credit facilities	871	1,218	1,712	2,418
Interest expense-lease liabilities	47		78
Letters of guarantee		490	(46)	807
Total finance costs	$ 13,306	$ 7,367	$ 27,252	$ 14,474

Issued Capital - Summary of Cap

Issued Capital - Summary of Capital Issued (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Disclosure of Capital and Reserve [line items]
Issued capital	$ 3,560,705	$ 3,516,437
Issued Capital [member]
Disclosure of Capital and Reserve [line items]
Issued capital	$ 3,560,705	$ 3,516,437

Issued Capital - Summary of C_2

Issued Capital - Summary of Capital Issued (Parenthetical) (Detail) - shares	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Disclosure of Capital and Reserve [line items]
Common shares outstanding	446,265,488	445,219,261	444,336,361	443,559,922	442,794,484	442,724,309
Issued Capital [member]
Disclosure of Capital and Reserve [line items]
Common shares issued	446,265,488		444,336,361
Common shares outstanding	446,265,488		444,336,361

Issued Capital - Additional Inf

Issued Capital - Additional Information (Detail)	Jun. 30, 2019$ / sharesshares
Disclosure of classes of share capital [abstract]
Par value per common share | $ / shares	$ 0
Preference shares outstanding | shares	0

Issued Capital - Summary of Com

Issued Capital - Summary of Common Shares Issued and Outstanding (Detail)	3 Months Ended							6 Months Ended
	Jun. 30, 2019$ / sharesshares	Jun. 30, 2019$ / sharesshares	Mar. 31, 2019$ / sharesshares	Mar. 31, 2019$ / sharesshares	Jun. 30, 2018$ / sharesshares	Jun. 30, 2018$ / sharesshares	Mar. 31, 2018$ / sharesshares	Dec. 31, 2018$ / sharesshares
Disclosure of classes of share capital [abstract]
Balance, shares at beginning of period	445,219,261	445,219,261	444,336,361	444,336,361	442,794,484	442,794,484	442,724,309	443,559,922
Share purchase options exercised | $ / shares	$ 26.09		$ 26.55		$ 24.28
Restricted share units released | (per share)		$ 0		$ 0	$ 0		$ 0	$ 0
Dividend reinvestment plan | $ / shares		$ 21.89				$ 21.09		$ 15.56
Share purchase options exercised	283,620	283,620	752,170	752,170	46,800	46,800
Restricted share units released	185	185	130,730	130,730	185	185	70,175	33,818
Dividend reinvestment plan	762,422	762,422			718,453	718,453		742,621
Balance, shares at end of period	446,265,488	446,265,488	445,219,261	445,219,261	443,559,922	443,559,922	442,794,484	444,336,361

Issued Capital - Summary of C_3

Issued Capital - Summary of Common Shares Issued and Outstanding (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2019
Disclosure of classes of share capital [abstract]
Discount applied to average share price in determining number of shares to be issued under DRIP	3.00%

Issued Capital - Schedule of Di

Issued Capital - Schedule of Dividends Declared (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Disclosure of Dividends [line items]
Dividends declared per share	$ 0.09		$ 0.09		$ 0.18		$ 0.18
Average number of shares eligible for dividend	445,928,000		443,197,000		445,597,000		442,996,000
Total dividends paid	$ 23,441	$ 40,074	$ 24,738	$ 39,852	$ 998,000	$ 68,326
Shares issued under the DRIP	378,135		347,461		762,422		718,453
Cash percentage	80.00%		81.00%		79.00%		81.00%
DRIP percentage	20.00%		19.00%		21.00%		19.00%
Total dividends paid percentage	100.00%		100.00%		100.00%		100.00%
Retained Earnings [member]
Disclosure of Dividends [line items]
Total dividends paid	$ 40,133	$ 40,074	$ 39,888	$ 39,852	$ 80,207	$ 79,879	$ 79,739
Dividends Paid in Cash [member]
Disclosure of Dividends [line items]
Total dividends paid	31,950		32,480		63,515		64,589
Dividends Paid in DRIP [member]
Disclosure of Dividends [line items]
Total dividends paid	$ 8,183		$ 7,408		$ 16,692		$ 15,150

Issued Capital - Schedule of _2

Issued Capital - Schedule of Dividends Declared (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Dec. 31, 2018
Disclosure of dividend [abstract]
Dividend declared	$ 23,441	$ 40,074	$ 24,738	$ 39,852	$ 998,000	$ 68,326
Dividend reinvested discount rate					3.00%

Reserves - Summary of Reserves

Reserves - Summary of Reserves (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Reserves
Share purchase warrants	$ 83,077	$ 83,077
Share purchase options	26,771	31,002
Restricted share units	4,843	5,970
Long-term investment revaluation reserve, net of tax	(63,484)	(112,156)
Total reserves	$ 51,207	$ 7,893

Reserves - Summary of Share Pur

Reserves - Summary of Share Purchase Warrants (Detail) $ / shares in Units, $ in Thousands	Jun. 30, 2019USD ($)Exchange_Ratio$ / sharesshares	Dec. 31, 2018USD ($)
Disclosure of reserves within equity [abstract]
Number of warrants | shares	10,000,000
Exercise Price of Outstanding Share Purchase Warrants, Ending balance | $ / shares	$ 43.75
Exchange Ratio | Exchange_Ratio	1
Share Purchase Warrants Reserve | $	$ 83,077	$ 83,077

Reserves - Additional Informati

Reserves - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019CAD ($)sharesOption$ / shares	Mar. 31, 2019CAD ($)shares	Jun. 30, 2018CAD ($)sharesOption$ / shares	Mar. 31, 2018CAD ($)shares	Jun. 30, 2019USD ($)shares	Jun. 30, 2019CAD ($)sharesOption$ / shares	Jun. 30, 2018USD ($)shares	Jun. 30, 2018CAD ($)Option$ / sharesshares	Dec. 31, 2018CAD ($)	Dec. 31, 2017CAD ($)
Disclosure of terms and conditions of share-based payment arrangement [line items]
Warrant holders right to purchase common shares					Each warrant entitles the holder the right to purchase one of the Company's common shares.	Each warrant entitles the holder the right to purchase one of the Company's common shares.
Share purchase options outstanding	3,407,815	3,705,130	3,887,850	3,948,590		3,407,815		3,887,850	3,883,350	4,232,260
Options outstanding weighted average exercise price	$ 26.52	$ 26.58	$ 25.58	$ 25.50		$ 26.52		$ 25.58	$ 25.71	$ 26.71
Stock Options [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Maximum term of share purchase option					Ten years	Ten years
Vesting period					Two years	Two years
Trailing period for expected volatility					30 months	30 months
Description of share option grants					The Company expenses the fair value of share purchase options that are expected to vest on a straight-line basis over the vesting period using the Black-Scholes option pricing model to estimate the fair value for each option at the date of grant.	The Company expenses the fair value of share purchase options that are expected to vest on a straight-line basis over the vesting period using the Black-Scholes option pricing model to estimate the fair value for each option at the date of grant.
Share purchase options outstanding | Option	3,407,815		3,887,850			3,407,815		3,887,850
Options outstanding weighted average exercise price	$ 26.52		$ 25.58			$ 26.52		$ 25.58
Weighted average share price at the time of exercise	$ 27.42		$ 28.10			$ 31.79
Stock Options [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Description of Typical Term Of options issued					Five years	Five years
RSU [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period					Two years	Two years
Fair value of RSUs issued during the year					$ 3		$ 3
Number of RSU issued | shares	1,400	131,210	790	160,270	132,610	132,610	161,060
Weighted average fair value per RSU granted | $ / shares	$ 29.68		$ 27.96			$ 32.89		$ 26.25
RSUs outstanding at reporting date | shares	370,718		403,951			370,718		403,951

Reserves - Summary of Fair Valu

Reserves - Summary of Fair Value of Share Purchase Options (Detail) $ / shares in Units, $ in Thousands	3 Months Ended								6 Months Ended
	Jun. 30, 2019USD ($)yrshares	Jun. 30, 2019CAD ($)yr$ / sharesshares	Mar. 31, 2019USD ($)	Mar. 31, 2019$ / shares	Jun. 30, 2018USD ($)yrshares	Jun. 30, 2018CAD ($)yr$ / sharesshares	Mar. 31, 2018USD ($)	Mar. 31, 2018$ / shares	Jun. 30, 2019USD ($)yrshares	Jun. 30, 2019CAD ($)yr$ / sharesshares	Jun. 30, 2018USD ($)yrshares	Jun. 30, 2018CAD ($)yr$ / sharesshares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value per option granted | $ / shares		$ 5.29		$ 6.11		$ 6		$ 5.49
Total fair value of options issued			$ 3,000				$ 2,000
Black-Scholes Weighted Average Assumptions [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date share price and exercise price		$ 29.79				$ 27.96				$ 32.88		$ 26.25
Expected dividend yield	1.60%	1.60%			1.65%	1.65%			1.49%	1.49%	1.73%	1.73%
Expected volatility	30.00%	30.00%			35.00%	35.00%			31.00%	31.00%	35.00%	35.00%
Risk-free interest rate	1.43%	1.43%			2.37%	2.37%			1.60%	1.60%	1.91%	1.91%
Expected option life, in years | yr	2.5	2.5			2.5	2.5			2.5	2.5	2.5	2.5
Weighted average fair value per option granted | $ / shares		$ 5.29				$ 6				$ 6.10		$ 5.49
Number of options issued during the period | shares	8,200	8,200			3,880	3,880			583,500	583,500	549,210	549,210
Total fair value of options issued	$ 32				$ 18				$ 2,652		$ 2,347

Reserves - Disclosure of Outsta

Reserves - Disclosure of Outstanding Share Purchase Options (Detail)	3 Months Ended				6 Months Ended
	Jun. 30, 2019CAD ($)	Mar. 31, 2019CAD ($)	Jun. 30, 2018CAD ($)	Mar. 31, 2018CAD ($)	Dec. 31, 2018CAD ($)
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Number of Options Outstanding, Beginning balance	3,705,130	3,883,350	3,948,590	4,232,260	3,887,850
Number of Options Outstanding, Granted	8,200	575,300	3,880	545,330
Number of Options Outstanding, Exercised	(283,620)	(752,170)	(46,800)
Number of Options Outstanding, Forfeited	(4,745)	(1,350)	(2,820)		(4,500)
Number of Options Outstanding, Expired	(17,150)		(15,000)	(829,000)
Number of Options Outstanding, Ending balance	3,407,815	3,705,130	3,887,850	3,948,590	3,883,350
Weighted Average Exercise Price, Beginning balance	$ 26.58	$ 25.71	$ 25.50	$ 26.71	$ 25.58
Weighted Average Exercise Price, Granted	29.79	32.92	27.96	26.24
Weighted Average Exercise Price, Exercised	26.09	26.55	24.28
Weighted Average Exercise Price, Forfeited	30.78	26.85	26.98		30.65
Weighted Average Exercise Price, Expired	30.69		30.19	32.75
Weighted Average Exercise Price, Ending balance	$ 26.52	$ 26.58	$ 25.58	$ 25.50	$ 25.71

Reserves - Disclosure of Outs_2

Reserves - Disclosure of Outstanding Share Purchase Options (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Jun. 30, 2019$ / shares	Mar. 31, 2019USD ($)	Mar. 31, 2019$ / shares	Jun. 30, 2018$ / shares	Mar. 31, 2018USD ($)	Mar. 31, 2018$ / shares
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Fair value per option granted | $ / shares	$ 5.29		$ 6.11	$ 6		$ 5.49
Fair value of options issued during the year | $		$ 3			$ 2

Reserves - Disclosure of Restri

Reserves - Disclosure of Restricted Share Units Reserve (Detail) - RSU [member]	3 Months Ended				6 Months Ended
	Jun. 30, 2019USD ($)shares	Mar. 31, 2019USD ($)shares	Jun. 30, 2018USD ($)shares	Mar. 31, 2018USD ($)shares	Jun. 30, 2019USD ($)shares	Dec. 31, 2018USD ($)shares	Jun. 30, 2018USD ($)shares
Disclosure of restricted share units reserve [line items]
Beginning balance | shares	370,333	370,133	403,941	313,846	370,133	403,951	313,846
Granted | shares	1,400	131,210	790	160,270	132,610		161,060
Released | shares	(185)	(130,730)	(185)	(70,175)		(33,818)
Forfeited | shares	(830)	(280)	(595)
Ending balance | shares	370,718	370,333	403,951	403,941	370,718	370,133	403,951
Weighted Average Intrinsic Value, Beginning Balance | $	$ 21.66	$ 20.36	$ 20.54	$ 20.71	$ 20.36	$ 20.54	$ 20.71
Weighted Average Intrinsic Value, Granted | $	22.12	24.53	21.89	20.41
Weighted Average Intrinsic Value, Released | $	20.44	20.85	20.44	20.98		22.54
Weighted Average Intrinsic Value, Forfeited | $	23	20.51	20.48
Weighted Average Intrinsic Value, Ending Balance | $	$ 21.66	$ 21.66	$ 20.54	$ 20.54	$ 21.66	$ 20.36	$ 20.54

Reserves - Disclosure of Rest_2

Reserves - Disclosure of Restricted Share Units Reserve (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
RSU [member]
Disclosure of restricted share units reserve [line items]
Fair value of RSU granted	$ 3	$ 3

Reserves - Disclosure of Long T

Reserves - Disclosure of Long Term Investment Revaluation Reserve (Detail) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended
	Jun. 30, 2019		Mar. 31, 2019		Jun. 30, 2018		Mar. 31, 2018		Jun. 30, 2019	Dec. 31, 2018		Jun. 30, 2018
Disclosure Of Long Term Investment Revaluation Reserve [line items]
Unrealized gain (loss) on LTIs	$ 28,070	[1]	$ 20,602	[1]	$ 13,430	[1]	$ (3,586)	[1]	$ 48,672	$ (52,491)	[1]	$ 9,843
LTI revaluation reserve (net of tax) [member]
Disclosure Of Long Term Investment Revaluation Reserve [line items]
Long-term investment revaluation reserve at beginning of period	(91,554)		(112,156)		(43,633)		(40,047)		(112,156)	(30,203)		(40,047)
Unrealized gain (loss) on LTIs	28,070		20,602		13,430		(3,586)			(52,491)
Reallocate reserve to retained earnings upon disposal of LTIs										(29,462)
Long-term investment revaluation reserve at end of period	(63,484)		(91,554)		(30,203)		(43,633)		(63,484)	(112,156)		(30,203)
Change in Fair Value [Member] | LTI revaluation reserve (net of tax) [member]
Disclosure Of Long Term Investment Revaluation Reserve [line items]
Long-term investment revaluation reserve at beginning of period	(91,509)		(112,156)		(41,239)		(38,111)		(112,156)	(24,576)		(38,111)
Unrealized gain (loss) on LTIs	30,026		20,647		16,663		(3,128)			(53,520)
Reallocate reserve to retained earnings upon disposal of LTIs										(34,060)
Long-term investment revaluation reserve at end of period	(61,483)		(91,509)		(24,576)		(41,239)		(61,483)	(112,156)		(24,576)
Deferred Tax Recovery Expense [member] | LTI revaluation reserve (net of tax) [member]
Disclosure Of Long Term Investment Revaluation Reserve [line items]
Long-term investment revaluation reserve at beginning of period	(45)				(2,394)		(1,936)			(5,627)		(1,936)
Unrealized gain (loss) on LTIs	(1,956)		(45)		(3,233)		(458)			1,029
Reallocate reserve to retained earnings upon disposal of LTIs										$ 4,598
Long-term investment revaluation reserve at end of period	$ (2,001)		$ (45)		$ (5,627)		$ (2,394)		$ (2,001)			$ (5,627)
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

Stock Based Compensation - Perf

Stock Based Compensation - Performance Share Units - Additional Information (Detail) - PSU	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure of information relative to Performance Share Units [line items]
Number of performance share units granted	2,850	188,560	1,590	218,670
Performance share units (PSUs) [member]
Disclosure of information relative to Performance Share Units [line items]
PSUs vesting period					3 years
Number of performance share units granted	2,850		1,590		191,410	220,260
Performance share units (PSUs) [member] | Bottom of range [member]
Disclosure of information relative to Performance Share Units [line items]
Potential Performance Factors						0.00%
Performance share units (PSUs) [member] | Top of range [member]
Disclosure of information relative to Performance Share Units [line items]
Potential Performance Factors						200.00%

Stock Based Compensation - Sche

Stock Based Compensation - Schedule of the Company's Outstanding PSUs (Detail)	3 Months Ended				6 Months Ended
	Jun. 30, 2019USD ($)PSU	Mar. 31, 2019USD ($)PSU	Jun. 30, 2018USD ($)PSU	Mar. 31, 2018USD ($)PSU	Jun. 30, 2019PSU	Dec. 31, 2018USD ($)PSU	Jun. 30, 2018PSU
Disclosure Of Other Equity Instruments - Performance Share Units [abstract]
Beginning balance | PSU	654,457	655,727	656,654	656,599	655,727	655,727	656,599
Beginning balance | $				$ 1,430
Granted | PSU	2,850	188,560	1,590	218,670
Accrual related to the fair value of the PSUs outstanding | PSU	0	0	0	0		0
Foreign exchange adjustment | PSU	0	0	0	0		0
Paid | PSU	(39,836)	(189,214)		(218,615)
Forfeited | PSU	(7,629)	(616)	(2,517)
Ending balance | PSU	609,842	654,457	655,727	656,654	609,842	655,727	655,727
Granted | $	$ 0	$ 0	$ 0	$ 0
Accrual related to the fair value of the PSUs outstanding | $	2,417	7,124	3,316	184		$ 6,018
Foreign exchange adjustment | $	148	185	(21)	(32)		(132)
Paid | $	(1,624)	(7,701)
Forfeited | $		(15)	(6)
Ending balance | $	$ 11,291	$ 10,350	$ 4,871	$ 1,582		$ 10,757

Stock Based Compensation - Sc_2

Stock Based Compensation - Schedule of the Company's Outstanding PSUs (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2018
Performance share units (PSUs) [member]
Disclosure of other equity instruments [line items]
Actual performance factor achieved during completed performance period	0.00%

Stock Based Compensation - Sc_3

Stock Based Compensation - Schedule of Performance Share Units Outstanding (Detail)	6 Months Ended
	Jun. 30, 2019USD ($)PSU$ / shares	Mar. 31, 2019PSU	Dec. 31, 2018PSU	Jun. 30, 2018PSU	Mar. 31, 2018PSU	Dec. 31, 2017PSU
Disclosure of other equity instruments [line items]
Number outstanding | PSU	609,842	654,457	655,727	655,727	656,654	656,599
PSU liability at June 30, 2019	$ 11,291
Grant Year 2017 [Member]
Disclosure of other equity instruments [line items]
Year of maturity	2020
Number outstanding	204,142
Estimated Value Per PSU at Maturity | $ / shares	$ 23.98
Anticipated performance factor at maturity	197.00%
Percent of vesting period complete	75.00%
PSU liability at June 30, 2019	$ 7,214
Grant Year 2018 [Member]
Disclosure of other equity instruments [line items]
Year of maturity	2021
Number outstanding	216,440
Estimated Value Per PSU at Maturity | $ / shares	$ 23.98
Anticipated performance factor at maturity	168.00%
Percent of vesting period complete	42.00%
PSU liability at June 30, 2019	$ 3,665
Grant Year 2019 [Member]
Disclosure of other equity instruments [line items]
Year of maturity	2022
Number outstanding	189,260
Estimated Value Per PSU at Maturity | $ / shares	$ 23.98
Anticipated performance factor at maturity	106.00%
Percent of vesting period complete	9.00%
PSU liability at June 30, 2019	$ 412

Earnings per Share ("EPS") an_3

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") - Summary of Diluted EPS Calculated Based on Weighted Average Number of Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings per share [line items]
Basic weighted average number of shares outstanding	445,769	443,191	445,083	442,961
Diluted weighted average number of shares outstanding	446,470	443,770	445,815	443,453
Share purchase options [member]
Earnings per share [line items]
Restricted share units	444	175	422	131
Restricted stock units [member]
Earnings per share [line items]
Restricted share units	257	404	310	361

Earnings per Share ("EPS") an_4

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") - Additional Information (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings per share [abstract]
Average market value of common shares	$ 29.68	$ 27.76	$ 28.96	$ 26.89

Earnings per Share ("EPS") an_5

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") - Summary of Share Purchase Options and Share Purchase Warrants Excluded From Computation of Diluted Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings per share [line items]
Share options not included in calculation of diluted earnings per share	10,599	10,827	10,599	11,983
Share purchase options [member]
Earnings per share [line items]
Share options not included in calculation of diluted earnings per share	599	827	599	1,983
Share purchase warrants [member]
Earnings per share [line items]
Share options not included in calculation of diluted earnings per share	10,000	10,000	10,000	10,000

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Summary of Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Change in non-cash working capital
Accounts receivable	$ 559	$ (4,663)	$ 867	$ (3,784)
Accounts payable and accrued liabilities	5,274	4,975	(2,267)	817
Other	(1,174)	(2,084)	(1,111)	(1,880)
Total change in non-cash working capital	$ 4,659	$ (1,772)	$ (2,511)	$ (4,847)

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Disclosure of cash flow statement [line items]
Total cash outflow relative to company's leases	$ 153				$ 323
Dividends declared per share	$ 0.09		$ 0.09		$ 0.18		$ 0.18
Total dividends paid	$ 23,441	$ 40,074	$ 24,738	$ 39,852	$ 998,000	$ 68,326
DRIP percentage	20.00%		19.00%		21.00%		19.00%
Retained Earnings [member]
Disclosure of cash flow statement [line items]
Total dividends paid	$ 40,133	$ 40,074	$ 39,888	$ 39,852	$ 80,207	$ 79,879	$ 79,739
Dividends Paid in Cash [member]
Disclosure of cash flow statement [line items]
Total dividends paid	31,950		32,480		63,515		64,589
Dividends Paid in DRIP [member]
Disclosure of cash flow statement [line items]
Total dividends paid	$ 8,183		$ 7,408		$ 16,692		$ 15,150
First Majestic [member] | San Dimas [member]
Disclosure of cash flow statement [line items]
Number of common shares received			20,914,590				20,914,590
Fair value of shares received							$ 151,000

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Expense (Recovery) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Major components of tax expense (income) [abstract]
Current income tax expense	$ 85	$ 29	$ 104	$ 51
Origination and reversal of temporary differences	1,089	845	4,284	1,891
Reversal of write down or recognition of prior period temporary differences	(3,932)	(4,098)	(7,256)	(5,651)
Total deferred income tax expense (recovery)	(2,843)	(3,253)	(2,972)	(3,760)	$ (704)
Income tax expense (recovery)	$ (2,758)	$ (3,224)	$ (2,868)	$ (3,709)

Income Taxes - Schedule of In_2

Income Taxes - Schedule of Income Tax Recognized as Component of OCI (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2019		Jun. 30, 2018		Dec. 31, 2018
Income tax relating to components of other comprehensive income [abstract]
Income tax expense (recovery) related to LTIs - common shares held	$ 1,956		$ 3,233		$ 2,001		$ 3,691
Income tax expense (recovery) recognized in OCI	$ 1,956	[1]	$ 3,233	[1]	$ 2,001	[1]	$ 3,691	[1]	$ 2,662
[1]	LTIs = long-term investments - common shares held.

Income Taxes - Schedule of In_3

Income Taxes - Schedule of Income Tax Recognized Directly in Equity (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended			12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2018
Current and deferred tax relating to items charged or credited directly to equity [line items]
Income tax expense (recovery) recognized in equity	$ 894	$ 92	$ 30	$ 59	$ 986	$ (14,479)	$ 89	$ (1,923)
Write-down of previously recognized temporary differences [member]
Current and deferred tax relating to items charged or credited directly to equity [line items]
Income tax expense (recovery) recognized in equity	$ 894		$ 30		$ 986		$ 89

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Earnings (loss) before income taxes	$ (127,452)	$ 314,918	$ (70,213)	$ 382,556
Canadian federal and provincial income tax rates	27.00%	27.00%	27.00%	27.00%
Income tax expense (recovery) based on above rates	$ (34,413)	$ 85,028	$ (18,958)	$ 103,290
Non-deductible stock based compensation and other	1,225	1,128	1,795	1,915
Differences in tax rates in foreign jurisdictions	(14,866)	(86,764)	(33,761)	(106,925)
Current period unrecognized temporary differences - impairments	44,796		44,796
Current period unrecognized temporary differences	4,432	1,482	10,516	3,662
Reversal of write down or recognition of prior period temporary differences	(3,932)	(4,098)	(7,256)	(5,651)
Income tax expense (recovery)	$ (2,758)	$ (3,224)	$ (2,868)	$ (3,709)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2018USD ($)	Dec. 31, 2018CAD ($)
Income tax [line items]
Name of subsidiary	Wheaton Precious Metals International Ltd.,
Proportion of ownership interest in subsidiary	100.00%
Impact of CRA Settlement [member] | 2005 - 2017 taxation year [member]
Income tax [line items]
Total tax assessment related to CRA settlement		$ 4.3	$ 5.6
Interest and penalties assessed by CRA related to CRA settlement		4.4	5.7
Interest and penalties under dispute		$ 1.4	$ 1.9

Income Taxes - Deferred Income

Income Taxes - Deferred Income Tax Assets and Liabilities Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended					12 Months Ended
	Jun. 30, 2019		Mar. 31, 2019	Jun. 30, 2018		Mar. 31, 2018	Jun. 30, 2019		Dec. 31, 2018	Jun. 30, 2018		Dec. 31, 2018
Deferred Tax Assets And Liabilities [line items]
Opening Balance			$ (111)			$ (76)	$ (111)			$ (76)		$ (76)
Recovery (Expense) Recognized In Net Earnings	$ 2,843			$ 3,253			2,972			3,760		704
Recovery (Expense) Recognized In OCI	(1,956)	[1]		(3,233)	[1]		(2,001)	[1]		(3,691)	[1]	(2,662)
Recovery (Expense) Recognized In Shareholders' Equity	(894)		(92)	$ (30)		(59)	(986)		$ 14,479	(89)		1,923
Closing Balance	(125)						(125)		(111)			(111)
Non-capital loss carryforwards [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			3,823			3,848	3,823			3,848		3,848
Recovery (Expense) Recognized In Net Earnings							1,002					(2,057)
Recovery (Expense) Recognized In Shareholders' Equity							(936)					2,032
Closing Balance	3,889						3,889		3,823			3,823
Capital losses carryforward [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance						1,965				1,965		1,965
Recovery (Expense) Recognized In Net Earnings							2,001					2,633
LTI Disposition												(4,598)
Closing Balance	2,001						2,001
Deferred tax assets other [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			387			147	387			147		147
Recovery (Expense) Recognized In Net Earnings							45					240
Closing Balance	432						432		387			387
Interest capitalized for accounting [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(87)			(87)	(87)			(87)		(87)
Closing Balance	(87)						(87)		(87)			(87)
Debt and share financing fees [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(591)			(375)	(591)			(375)		(375)
Recovery (Expense) Recognized In Net Earnings							(61)					(107)
Recovery (Expense) Recognized In Shareholders' Equity							(50)					(109)
Closing Balance	(702)						(702)		(591)			(591)
Kutcho convertible note [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance						(29)				(29)		(29)
Recovery (Expense) Recognized In Net Earnings												29
Unrealized gains on long term investments [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance						(1,937)				(1,937)		(1,937)
Recovery (Expense) Recognized In Net Earnings												1
LTI Disposition												4,598
Recovery (Expense) Recognized In OCI							(2,001)					(2,662)
Closing Balance	(2,001)						(2,001)
Mineral stream interest [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(3,532)			(3,532)	(3,532)			(3,532)		(3,532)
Closing Balance	(3,532)						(3,532)		(3,532)			(3,532)
Foreign withholding tax [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			$ (111)			$ (76)	(111)			$ (76)		(76)
Recovery (Expense) Recognized In Net Earnings							(14)					(35)
Closing Balance	$ (125)						$ (125)		$ (111)			$ (111)
[1]	LTIs = long-term investments - common shares held.

Income Taxes - Deferred Incom_2

Income Taxes - Deferred Income Tax Assets and Liabilities Recognized (Parenthetical) (Detail) $ in Millions	Jun. 30, 2019USD ($)
Deferred tax assets and liabilities [abstract]
Non-tax effected deductible temporary differences on account of income which have been recognized as a deferred tax asset	$ 14
Non-tax effected deductible temporary differences on account of capital which have been recognized as a deferred tax asset	$ 7

Income Taxes -Schedule of Defer

Income Taxes -Schedule of Deferred Income Tax Assets Unrecognized (Detail) - Canada [member] - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Unrecognized deferred tax assets [line items]
Deferred tax assets	$ 151,612	$ 107,334
Non-capital losses [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	17,544	7,209
Financing fees [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	2,978	4,474
Mineral stream interest [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	110,750	67,717
Deferred tax assets other [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	2,647	3,656
Capital losses [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	5,796	7,723
Convertible note receivable [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	829	648
Unrealized losses on long term investments [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	$ 11,068	$ 15,907

Income Taxes -Schedule of Def_2

Income Taxes -Schedule of Deferred Income Tax Assets Unrecognized (Parenthetical) (Detail) - Canada [member] $ in Millions	Jun. 30, 2019USD ($)
Non-capital losses [member]
Unrecognized deferred tax assets [line items]
Non-tax effected deductible temporary differences for which no deferred tax asset is recognized	$ 65
Capital losses [member]
Unrecognized deferred tax assets [line items]
Non-tax effected deductible temporary differences for which no deferred tax asset is recognized	$ 21

Other Long-Term Assets - Schedu

Other Long-Term Assets - Schedule of Other Long-Term Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other long-term assets
Intangible assets	$ 4,203	$ 3,291
Debt issue costs-Revolving Facility	5,883	5,507
Other	1,447	1,517
Total other long-term assets	$ 11,533	$ 10,315

Commitments and Contingencies -

Commitments and Contingencies - Summary of Commitments to Purchase Mineral Stream (Detail)	6 Months Ended
	Jun. 30, 2019$ / oz
Penasquito [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Jul. 24, 2007
Penasquito [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Penasquito [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	25.00%
Per Unit of Measurement Cash Payment	4.21
Penasquito [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Penasquito [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Constancia [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Aug. 8, 2012
Constancia [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	50.00%
Per Unit of Measurement Cash Payment	400
Constancia [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	5.90
Constancia [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Constancia [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Salobo [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Feb. 28, 2013
Salobo [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	75.00%
Per Unit of Measurement Cash Payment	404
Salobo [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Salobo [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Salobo [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Sudbury [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	20 years
Date of Original Contract	Feb. 28, 2013
Sudbury [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	70.00%
Per Unit of Measurement Cash Payment	400
Sudbury [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Sudbury [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Sudbury [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Nov. 3, 2015
Antamina [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Antamina [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	33.75%
Antamina [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Antamina [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	May 10, 2018
San Dimas [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased, description	Variable
Per Unit of Measurement Cash Payment	600
San Dimas [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
San Dimas [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
San Dimas [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Jul. 16, 2018
Stillwater [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	100.00%
Stillwater [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Stillwater [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	4.50%
Stillwater [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Voisey's Bay [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Jun. 11, 2018
Voisey's Bay [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Voisey's Bay [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Voisey's Bay [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Voisey's Bay [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	42.40%
Los Filos [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	25 years
Date of Original Contract	Oct. 15, 2004
Los Filos [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Los Filos [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.39
Los Filos [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Los Filos [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Zinkgruvan [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Dec. 8, 2004
Zinkgruvan [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Zinkgruvan [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.39
Zinkgruvan [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Zinkgruvan [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Mar. 23, 2006
Yauliyacu [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Yauliyacu [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	8.89
Yauliyacu [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Yauliyacu [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Stratoni [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Apr. 23, 2007
Stratoni [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Stratoni [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	9.31
Stratoni [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Stratoni [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Neves-Corvo [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	50 years
Date of Original Contract	Jun. 5, 2007
Neves-Corvo [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Neves-Corvo [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.30
Neves-Corvo [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Neves-Corvo [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	50 years
Date of Original Contract	Jun. 5, 2007
Aljustrel [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Aljustrel [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	100.00%
Aljustrel [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Aljustrel [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Minto [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Nov. 20, 2008
Minto [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	325
Minto [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.22
Minto [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Minto [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Keno Hill [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Oct. 2, 2008
Keno Hill [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Keno Hill [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	25.00%
Keno Hill [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Keno Hill [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Pascua-Lama [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Sep. 8, 2009
Pascua-Lama [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Pascua-Lama [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	25.00%
Per Unit of Measurement Cash Payment	3.90
Pascua-Lama [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Pascua-Lama [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Rosemont [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Feb. 10, 2010
Rosemont [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	450
Rosemont [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	3.90
Rosemont [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Rosemont [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
777 [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Aug. 8, 2012
777 [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	50.00%
Per Unit of Measurement Cash Payment	416
777 [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	6.14
777 [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
777 [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Toroparu [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Nov. 11, 2013
Toroparu [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	10.00%
Per Unit of Measurement Cash Payment	400
Toroparu [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	50.00%
Per Unit of Measurement Cash Payment	3.90
Toroparu [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Toroparu [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Cotabambas [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Mar. 21, 2016
Cotabambas [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	25.00%
Per Unit of Measurement Cash Payment	450
Cotabambas [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	5.90
Cotabambas [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Cotabambas [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Kutcho [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Date of Original Contract	Dec. 12, 2017
Kutcho [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	100.00%
Kutcho [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	variable
Percentage of production to be purchased	100.00%
Kutcho [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Kutcho [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Loma de La Plata [member]
Disclosure of contractual obligations and commitments [line items]
Term of Agreement	Life of Mine
Loma de La Plata [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Loma de La Plata [member] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	12.50%
Per Unit of Measurement Cash Payment	4
Loma de La Plata [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%
Loma de La Plata [member] | Cobalt [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment, description	n/a
Percentage of production to be purchased	0.00%

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Commitments to Purchase Mineral Stream (Parenthetical) (Detail) lb in Millions	6 Months Ended
	Jun. 30, 2019USD ($)$ / ozozlb
Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Minimum market price of silver on a per ounce basis before top up payment is required	20
Maximum market price of silver on a per ounce basis before top up payment is capped	40
Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Maximum percentage of copper included in concentrate	15.00%
Cotabambas [member]
Disclosure of contractual obligations and commitments [line items]
Cumulative silver equivalent ounces to be produced before reduction in stream percentage | oz	90,000,000
Kutcho [member]
Disclosure of contractual obligations and commitments [line items]
Per ounce cash payment as a percentage of the spot price of metal delivered	20.00%
Constancia and 777 [member]
Disclosure of contractual obligations and commitments [line items]
Initial term of contract	40 years
Silver interests [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Per ounce cash payment as a percentage of the spot price of metal delivered	20.00%
Gold interests [member] | San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	25.00%
Percentage of silver production to be Converted to gold and purchased	25.00%
Gold to silver exchange ratio	70
Gold to silver price ratio minimum limit for revisiting stated exchange rate	50
Gold to silver price ratio maximum limit for revisiting stated exchange rate	90
Exchange ratio to be fixed when price ratio reach minimum limit for six months	50
Exchange ratio to be fixed when price ratio reach maximum limit for six months	90
Gold to silver exchange ratio, description	If the average gold to silver price ratio decreases to less than 50:1 or increases to more than 90:1 for a period of 6 months or more, then the “70” shall be revised to “50” or “90”, as the case may be, until such time as the average gold to silver price ratio is between 50:1 to 90:1 for a period of 6 months or more in which event the “70” shall be reinstated.
Gold interests [member] | Minto [member]
Disclosure of contractual obligations and commitments [line items]
Minimum market price of copper before Minto top up payment is required	2.5
Gold [member] | Constancia [member]
Disclosure of contractual obligations and commitments [line items]
Fixed rate gold recoveries	55.00%
Percentage of production to be purchased	50.00%
Per Ounce Cash Payment	400
Gold [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Gold [member] | San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Per Ounce Cash Payment	600
Gold [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per ounce cash payment as a percentage of the per ounce price received related to metal delivered	18.00%
Balance of upfront cash deposit required for price change to take place | $	$ 0
Per ounce cash payment as a percentage of the spot price of metal delivered after upfront deposit reduced to NIL	22.00%
Gold [member] | Voisey's Bay [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Gold [member] | Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Gold [member] | Stratoni [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Gold [member] | Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Gold [member] | Minto [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Number of ounces to be delivered before sharing mechanism applies | oz	30,000
Attributable Payable Production to be Purchased there after	50.00%
Per Ounce Cash Payment	325
Gold [member] | Cotabambas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	25.00%
Attributable Payable Production to be Purchased after stream percentage reduction	16.67%
Per Ounce Cash Payment	450
Gold [member] | Kutcho [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Attributable Payable Production to be Purchased after stream percentage reduction	66.67%
Cumulative gold ounces to be delivered before reduction in stream percentage | oz	51,000
Gold [member] | Constancia deposit at constancia mine [member]
Disclosure of contractual obligations and commitments [line items]
Fixed rate gold recoveries	55.00%
Gold [member] | Pampacancha deposit at constancia mine [member]
Disclosure of contractual obligations and commitments [line items]
Fixed rate gold recoveries	70.00%
The end of fixed rate recoveries | oz	265,000
Gold [member] | Constancia and 777 [member]
Disclosure of contractual obligations and commitments [line items]
Price per ounce after the initial 40 year term	550
Silver [member] | Constancia [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Ounce Cash Payment	5.90
Silver [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	33.75%
Silver [member] | San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Silver [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Silver [member] | Voisey's Bay [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Silver [member] | Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Price floor on a per ounce basis | $	4.35
Percentage of production to be purchased	100.00%
Number of silver ounces to be delivered before sharing mechanism applies | oz	1,500,000
Top up payment to be paid on a per ounce basis as a percentage of the difference between the actual price per ounce and the Minimum price per ounce	50.00%
Purchase commitments percentage	50.00%
Minimum market price of silver on a per ounce basis before top up payment is required	20
Per Ounce Cash Payment	8.89
Maximum top up payment	10
Price cap on a per ounce basis	18.89
Silver [member] | Stratoni [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Ounce Cash Payment	9.31
Area of drilling completed level 1	10,000
Area of drilling completed level 2	20,000
Area of drilling completed level 3	30,000
Top up payment on a per ounce basis - level 1	2.5
Top up payment on a per ounce basis - level 2	5
Top up payment on a per ounce basis - level 3	7
Area of drilling completed	20,000
Silver [member] | Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per ounce cash payment as a percentage of the per ounce price received related to metal delivered	50.00%
Silver [member] | Minto [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Ounce Cash Payment	4.22
Silver [member] | Cotabambas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Attributable Payable Production to be Purchased after stream percentage reduction	66.67%
Per Ounce Cash Payment	5.90
Silver [member] | Kutcho [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Attributable Payable Production to be Purchased after stream percentage reduction	66.67%
Cumulative silver ounces to be delivered before reduction in stream percentage | oz	5,600,000
Silver [member] | Constancia and 777 [member]
Disclosure of contractual obligations and commitments [line items]
Price per ounce after the initial 40 year term	9.90
Palladium [member] | Constancia [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	4.50%
Percentage of production	4.50%
Number of ounces to be delivered before first step down in entitlement percentage	375,000
Percentage of production to be purchased after first step down	2.25%
Number of ounces to be delivered before second step down in entitlement percentage	550,000
Percentage of production to be purchased after second step down	1.00%
Per ounce cash payment as a percentage of the per ounce price received related to metal delivered	18.00%
Balance of upfront cash deposit required for price change to take place | $	$ 0
Per ounce cash payment as a percentage of the spot price of metal delivered after upfront deposit reduced to NIL	22.00%
Palladium [member] | Voisey's Bay [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Stratoni [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Minto [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Cotabambas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Palladium [member] | Kutcho [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Constancia [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Voisey's Bay [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	42.40%
Per ounce cash payment as a percentage of the per ounce price received related to metal delivered	18.00%
Balance of upfront cash deposit required for percentage entitlement step down to take place | $	$ 0
Per ounce cash payment as a percentage of the spot price of metal delivered after upfront deposit reduced to NIL	22.00%
Cobalt pounds to be delivered before entitlement step down takes effect | lb	31
Percentage of metal production at the mine which WPM is entitled to after step down	21.20%
Cobalt [member] | Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Stratoni [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Minto [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Cotabambas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%
Cobalt [member] | Kutcho [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	0.00%

Commitments and Contingencies_3

Commitments and Contingencies - Summary of Other Contractual Obligations and Contingencies (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Disclosure of contractual obligations [line items]
Total contractual obligations	$ 1,850,842
Bank debt [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,095,500
Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	160,016
Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	3,526
Rosemont [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	231,150
Loma de La Plata [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	32,400
Toroparu [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	138,000
Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	132,250
Kutcho [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	58,000
Not later than 1 year [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	24,303
Not later than 1 year [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	23,147
Not later than 1 year [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	406
Not later than 1 year [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	750
2023 - 2024 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,137,544
2023 - 2024 [member] | Bank debt [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,095,500
2023 - 2024 [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	39,922
2023 - 2024 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,122
2023 - 2024 [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,000
2020 - 2022 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	103,211
2020 - 2022 [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	96,947
2020 - 2022 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,764
2020 - 2022 [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	4,500
After 2024 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	234
After 2024 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	234
Sub-Total [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,265,292
Sub-Total [member] | Bank debt [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,095,500
Sub-Total [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	160,016
Sub-Total [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	3,526
Sub-Total [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	6,250
No scheduled due date [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	585,550
No scheduled due date [member] | Rosemont [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	231,150
No scheduled due date [member] | Loma de La Plata [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	32,400
No scheduled due date [member] | Toroparu [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	138,000
No scheduled due date [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	126,000
No scheduled due date [member] | Kutcho [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	$ 58,000

Commitments and Contingencies_4

Commitments and Contingencies - Summary of Other Contractual Obligations and Contingencies (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Disclosure of contractual obligations [line items]
Outstanding on the Revolving Facility	$ 1,095,500	$ 1,264,000
2023 - 2024 [member] | Bank debt [member]
Disclosure of contractual obligations [line items]
Outstanding on the Revolving Facility	1,100,000
No scheduled due date [member] | Rosemont [member]
Disclosure of contractual obligations [line items]
Contingent transaction costs	$ 1,000

Commitments and Contingencies_5

Commitments and Contingencies - Additional Information (Detail) Tonnes_Per_Day in Millions	Feb. 08, 2019USD ($)	Jun. 30, 2019USD ($)MillionTonnesPerAnnumTonnes_Per_Day
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid		$ 328,250,000
Upfront cash consideration paid to date		30,250,000
Reassessment interest and penalties		7,000,000
2016 -2018 taxation year [member]
Disclosure of contingent liabilities [line items]
Potential loss carry back to reduce cash taxes and interest in prior years		5,000,000
2013-2015 taxation year [member]
Disclosure of contingent liabilities [line items]
Potential estimated cash taxes, interest and penalties		2,000,000
Loma de La Plata [member]
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid		32,000,000
Rosemont [member]
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid	$ 230,000,000
First installment payable on permitting projet	50,000,000
Balance installment amount payable once project costs incurred exceeds specified amount	180,000,000
Project costs incurred to trigger balance installment payable	$ 98,000,000
Toroparu [member]
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid		$ 138,000,000
Reduced stream percentage of gold		0.909%
Current stream percentage of gold		10.00%
Current stream percentage of silver		50.00%
Reduced stream percentage of silver		0.00%
Amount of non-refundable advance		$ 2,000,000
Cotabambas [member]
Disclosure of contingent liabilities [line items]
Amount of non-refundable advance		2,000,000
Total upfront cash payment for early deposit silver streaming interest		140,000,000
Upfront cash consideration paid to date		8,000,000
Unpaid upfront cash consideration with scheduled payment dates		$ 6,000,000
Option repurchase precious metal stream, percentage		50.00%
Kutcho [member]
Disclosure of contingent liabilities [line items]
Total upfront cash payment for early deposit silver streaming interest		$ 65,000,000
Upfront cash consideration paid to date		7,000,000
Unpaid upfront cash consideration with no scheduled payment dates		58,000,000
Additional upfront consideration		$ 20,000,000
Mill throughput capacity | Tonnes_Per_Day		4,500
Additional payment condition		If processing throughput is increased to 4,500 tonnes per day or more within 5 years of attaining commercial production.
Salobo [member]
Disclosure of contingent liabilities [line items]
Mill throughput capacity | MillionTonnesPerAnnum		24
Salobo [member] | Bottom of range [member] | Mill Throughput Capacity Expansion [member]
Disclosure of contingent liabilities [line items]
Additional payment condition		Expansion payment due If throughput is expanded beyond 28 Mtpa by January 1, 2036.
Expanded Mill throughput capacity | MillionTonnesPerAnnum		28
Estimated expansion payments		$ 113,000,000
Salobo [member] | Bottom of range [member] | Mill Throughput Capacity Expansion [member] | Salobo Three Expansion [member]
Disclosure of contingent liabilities [line items]
Estimated expansion payments		$ 550,000,000
Salobo [member] | Top of range [member] | Mill Throughput Capacity Expansion [member]
Disclosure of contingent liabilities [line items]
Additional payment condition		Expansion payment due If throughput is expanded beyond40 Mtpa by January 1, 2021.
Expanded Mill throughput capacity | MillionTonnesPerAnnum		40
Estimated expansion payments		$ 953,000,000
Salobo [member] | Top of range [member] | Mill Throughput Capacity Expansion [member] | Salobo Three Expansion [member]
Disclosure of contingent liabilities [line items]
Estimated expansion payments		$ 650,000,000

Segmented Information - Schedul

Segmented Information - Schedule of Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Disclosure of operating segments [line items]
Sales	$ 189,466		$ 212,400		$ 414,515		$ 411,652
Cost of sales, excluding depletion	60,957		62,580		130,171		118,994
Depletion	61,404		62,494		129,785		119,759
Gross margin	67,105		87,326		154,559		172,899
Impairment charges	165,912				165,912
Net (loss) earnings	(124,694)	$ 57,349	318,142	$ 68,123	(67,345)	$ 40,850	386,265
Cash Flow From Operations	109,258		135,200		227,452		260,540
Total Assets	6,240,823		6,216,112		6,240,823	$ 6,470,046	6,216,112
General and administrative material reconciling items [member]
Disclosure of operating segments [line items]
Net (loss) earnings	(12,249)		(11,972)		(28,784)		(21,729)
Cash Flow From Operations	(9,189)		(8,273)		(33,900)		(17,918)
Finance costs material reconciling items [member]
Disclosure of operating segments [line items]
Net (loss) earnings	(13,306)		(7,367)		(27,252)		(14,474)
Cash Flow From Operations	(14,828)		(8,031)		(26,074)		(14,567)
Other material reconciling Items [member]
Disclosure of operating segments [line items]
Net (loss) earnings	(3,090)		1,216		(2,824)		145
Cash Flow From Operations	(3,168)		1,773		(1,954)		1,595
Income tax expense material reconciling items[member]
Disclosure of operating segments [line items]
Net (loss) earnings	2,758		3,224		2,868		3,709
Cash Flow From Operations	(24)		(48)		(3,585)		(98)
Aggregate material reconciling items [member]
Disclosure of operating segments [line items]
Net (loss) earnings	(25,887)		230,816		(55,992)		213,366
Cash Flow From Operations	(27,209)		(14,579)		(65,513)		(30,988)
Total Assets	379,684		430,317		379,684		430,317
Gain on disposal of the san dimas spa [member]
Disclosure of operating segments [line items]
Net (loss) earnings			245,715				245,715
Gold interests [member]
Disclosure of operating segments [line items]
Sales	118,870		113,753		269,270		206,839
Cost of sales, excluding depletion	37,853		35,473		85,834		63,388
Depletion	37,856		35,780		82,136		65,013
Gross margin	43,161				101,300
Net (loss) earnings	43,161		42,500		101,300		78,438
Cash Flow From Operations	88,586		78,382		191,442		142,470
Total Assets	3,573,916		3,497,813		3,573,916		3,497,813
Gold interests [member] | Sudbury [member]
Disclosure of operating segments [line items]
Sales	10,840		5,778		16,107		12,679
Cost of sales, excluding depletion	3,324		1,760		4,948		3,834
Depletion	6,807		3,498		10,135		7,622
Gross margin	709				1,024
Net (loss) earnings	709		520		1,024		1,223
Cash Flow From Operations	7,572		4,020		11,215		8,968
Total Assets	356,328		372,366		356,328		372,366
Gold interests [member] | Salobo [member]
Disclosure of operating segments [line items]
Sales	76,329		92,327		186,400		165,162
Cost of sales, excluding depletion	23,317		28,294		57,317		50,152
Depletion	22,114		27,316		54,363		48,418
Gross margin	30,898				74,720
Net (loss) earnings	30,898		36,717		74,720		66,592
Cash Flow From Operations	58,184		64,033		134,254		115,010
Total Assets	2,651,697		2,760,314		2,651,697		2,760,314
Gold interests [member] | Constancia [member]
Disclosure of operating segments [line items]
Sales	5,830		2,857		13,057		7,168
Cost of sales, excluding depletion	1,763		869		3,968		2,168
Depletion	1,592		812		3,583		2,026
Gross margin	2,475				5,506
Net (loss) earnings	2,475		1,176		5,506		2,974
Cash Flow From Operations	3,954		1,989		9,089		5,001
Total Assets	113,964		120,025		113,964		120,025
Gold interests [member] | Other gold interests [member]
Disclosure of operating segments [line items]
Sales	7,904		8,058		16,888		17,097
Cost of sales, excluding depletion	2,452		2,307		5,029		4,991
Depletion	2,445		2,075		4,113		4,868
Gross margin	3,007				7,746
Net (loss) earnings	3,007		3,676		7,746		7,238
Cash Flow From Operations	5,505		5,850		12,237		11,001
Total Assets	17,246		26,950		17,246		26,950
Gold interests [member] | San Dimas [member]
Disclosure of operating segments [line items]
Sales	13,601		4,733		28,731		4,733
Cost of sales, excluding depletion	6,226		2,243		13,132		2,243
Depletion	3,184		2,079		6,747		2,079
Gross margin	4,191				8,852
Net (loss) earnings	4,191		411		8,852		411
Cash Flow From Operations	9,776		2,490		18,000		2,490
Total Assets	201,448		218,158		201,448		218,158
Gold interests [member] | Stillwater [member]
Disclosure of operating segments [line items]
Sales	4,366				8,087
Cost of sales, excluding depletion	771				1,440
Depletion	1,714				3,195
Gross margin	1,881				3,452
Net (loss) earnings	1,881				3,452
Cash Flow From Operations	3,595				6,647
Total Assets	233,233				233,233
Silver interests [member]
Disclosure of operating segments [line items]
Sales	63,313		98,647		130,474		204,813
Cost of sales, excluding depletion	21,800		27,107		41,716		55,606
Depletion	21,070		26,714		42,733		54,746
Gross margin	20,443				46,025
Net (loss) earnings	20,443		44,826		46,025		94,461
Cash Flow From Operations	41,902		71,397		89,373		149,058
Total Assets	1,804,941		1,894,655		1,804,941		1,894,655
Silver interests [member] | Constancia [member]
Disclosure of operating segments [line items]
Sales	7,119		6,826		18,490		16,406
Cost of sales, excluding depletion	2,819		2,418		7,153		5,807
Depletion	3,586		2,927		9,095		7,030
Gross margin	714				2,242
Net (loss) earnings	714		1,481		2,242		3,569
Cash Flow From Operations	3,652		4,409		11,337		10,599
Total Assets	237,136		254,773		237,136		254,773
Silver interests [member] | San Dimas [member]
Disclosure of operating segments [line items]
Sales			17,673				40,594
Cost of sales, excluding depletion			4,622				10,549
Depletion			1,567				3,575
Net (loss) earnings			11,484				26,470
Cash Flow From Operations			13,051				30,045
Silver interests [member] | Penasquito [member]
Disclosure of operating segments [line items]
Sales	13,582		25,315		31,883		45,935
Cost of sales, excluding depletion	3,839		6,452		8,739		11,568
Depletion	2,794		4,572		6,359		8,198
Gross margin	6,949				16,785
Net (loss) earnings	6,949		14,291		16,785		26,169
Cash Flow From Operations	9,743		18,863		23,143		34,367
Total Assets	382,363		395,052		382,363		395,052
Silver interests [member] | Antamina [member]
Disclosure of operating segments [line items]
Sales	17,660		23,736		37,274		47,506
Cost of sales, excluding depletion	3,530		4,676		7,418		9,496
Depletion	10,352		12,369		21,310		24,659
Gross margin	3,778				8,546
Net (loss) earnings	3,778		6,691		8,546		13,351
Cash Flow From Operations	14,277		19,060		29,857		38,010
Total Assets	688,767		732,979		688,767		732,979
Silver interests [member] | Other silver interests [member]
Disclosure of operating segments [line items]
Sales	24,952		25,097		42,827		54,372
Cost of sales, excluding depletion	11,612		8,939		18,406		18,186
Depletion	4,338		5,279		5,969		11,284
Gross margin	9,002				18,452
Net (loss) earnings	9,002		10,879		18,452		24,902
Cash Flow From Operations	14,230		16,014		25,036		36,037
Total Assets	496,675		511,851		496,675		511,851
Mineral Stream Interests [member]
Disclosure of operating segments [line items]
Sales	189,466		212,400		414,515		411,652
Cost of sales, excluding depletion	60,957		62,580		130,171		118,994
Depletion	61,404		62,494		129,785		119,759
Gross margin	67,105				154,559
Impairment charges	165,912				165,912
Net (loss) earnings	(98,807)		87,326		(11,353)		172,899
Cash Flow From Operations	136,467		149,779		292,965		291,528
Total Assets	5,861,139		5,785,795		5,861,139		5,785,795
Palladium interest [member] | Stillwater [member]
Disclosure of operating segments [line items]
Sales	7,283				14,771
Cost of sales, excluding depletion	1,304				2,621
Depletion	2,478				4,916
Gross margin	3,501				7,234
Net (loss) earnings	3,501				7,234
Cash Flow From Operations	5,979				12,150
Total Assets	254,772				254,772
Cobalt Interests [member] | Voisey's Bay [member]
Disclosure of operating segments [line items]
Impairment charges	165,912				165,912
Net (loss) earnings	(165,912)				(165,912)
Total Assets	$ 227,510		$ 393,327		$ 227,510		$ 393,327

Segmented Information - Sched_2

Segmented Information - Schedule of Operating Segments (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gold interests [member]
Disclosure of operating segments [line items]
Percentage of sales	10.00%	10.00%	10.00%	10.00%
Silver interests [member]
Disclosure of operating segments [line items]
Percentage of sales	10.00%	10.00%	10.00%	10.00%
Silver interests [member] | Veladero and Lagunas Norte and Pierina [member]
Disclosure of operating segments [line items]
Agreement Expiration Date		March 31, 2018		March 31,2018

Segmented Information - Sched_3

Segmented Information - Schedule of Company's Geographical Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disclosure of geographical areas [line items]
Sales	$ 189,466	$ 212,400	$ 414,515	$ 411,652
Percentage of revenue derived from mineral stream interests located in geographic area	100.00%	100.00%	100.00%	100.00%
Mineral stream interest	$ 5,861,139	$ 5,785,795	$ 5,861,139	$ 5,785,795
Percentage of mineral stream interests located in geographic area	100.00%	100.00%	100.00%	100.00%
Canada [member]
Disclosure of geographical areas [line items]
Sales	$ 20,390	$ 15,448	$ 36,642	$ 33,917
Percentage of revenue derived from mineral stream interests located in geographic area	11.00%	7.00%	9.00%	8.00%
Mineral stream interest	$ 633,946	$ 828,190	$ 633,946	$ 828,190
Percentage of mineral stream interests located in geographic area	11.00%	14.00%	11.00%	14.00%
United States [member]
Disclosure of geographical areas [line items]
Sales	$ 11,648		$ 22,858
Percentage of revenue derived from mineral stream interests located in geographic area	6.00%	0.00%	5.00%	0.00%
Mineral stream interest	$ 488,561	$ 433	$ 488,561	$ 433
Percentage of mineral stream interests located in geographic area	8.00%	0.00%	8.00%	0.00%
Mexico [member]
Disclosure of geographical areas [line items]
Sales	$ 27,573	$ 48,285	$ 61,595	$ 92,693
Percentage of revenue derived from mineral stream interests located in geographic area	15.00%	23.00%	15.00%	23.00%
Mineral stream interest	$ 585,148	$ 614,616	$ 585,148	$ 614,616
Percentage of mineral stream interests located in geographic area	10.00%	10.00%	10.00%	10.00%
Greece [member]
Disclosure of geographical areas [line items]
Sales	$ 3,637	$ 2,763	$ 4,905	$ 5,248
Percentage of revenue derived from mineral stream interests located in geographic area	2.00%	1.00%	1.00%	1.00%
Mineral stream interest	$ 4,356	$ 7,108	$ 4,356	$ 7,108
Percentage of mineral stream interests located in geographic area	0.00%	0.00%	0.00%	0.00%
Portugal [member]
Disclosure of geographical areas [line items]
Sales	$ 6,127	$ 2,916	$ 16,347	$ 5,718
Percentage of revenue derived from mineral stream interests located in geographic area	3.00%	1.00%	4.00%	1.00%
Mineral stream interest	$ 21,848	$ 23,141	$ 21,848	$ 23,141
Percentage of mineral stream interests located in geographic area	0.00%	0.00%	0.00%	0.00%
Sweden [member]
Disclosure of geographical areas [line items]
Sales	$ 5,080	$ 4,882	$ 8,642	$ 11,316
Percentage of revenue derived from mineral stream interests located in geographic area	3.00%	2.00%	2.00%	3.00%
Mineral stream interest	$ 36,495	$ 38,623	$ 36,495	$ 38,623
Percentage of mineral stream interests located in geographic area	1.00%	1.00%	1.00%	1.00%
Argentina / Chile [member]
Disclosure of geographical areas [line items]
Sales		$ 1,723		$ 4,419
Percentage of revenue derived from mineral stream interests located in geographic area	0.00%	2.00%	0.00%	1.00%
Mineral stream interest	$ 264,401	$ 264,411	$ 264,401	$ 264,411
Percentage of mineral stream interests located in geographic area	5.00%	5.00%	5.00%	5.00%
Brazil [member]
Disclosure of geographical areas [line items]
Sales	$ 76,329	$ 92,327	$ 186,400	$ 165,162
Percentage of revenue derived from mineral stream interests located in geographic area	40.00%	43.00%	45.00%	40.00%
Mineral stream interest	$ 2,651,699	$ 2,760,314	$ 2,651,699	$ 2,760,314
Percentage of mineral stream interests located in geographic area	45.00%	48.00%	45.00%	48.00%
Peru [member]
Disclosure of geographical areas [line items]
Sales	$ 38,682	$ 44,056	$ 77,126	$ 93,179
Percentage of revenue derived from mineral stream interests located in geographic area	20.00%	21.00%	19.00%	23.00%
Mineral stream interest	$ 1,174,685	$ 1,248,959	$ 1,174,685	$ 1,248,959
Percentage of mineral stream interests located in geographic area	20.00%	22.00%	20.00%	22.00%
Gold interests [member]
Disclosure of geographical areas [line items]
Sales	$ 118,870	$ 113,753	$ 269,270	$ 206,839
Mineral stream interest	3,573,916	3,497,813	3,573,916	3,497,813	$ 3,656,056
Gold interests [member] | Canada [member]
Disclosure of geographical areas [line items]
Mineral stream interest	373,575	399,317	373,575	399,317
Gold interests [member] | United States [member]
Disclosure of geographical areas [line items]
Mineral stream interest	233,232		233,232
Gold interests [member] | Mexico [member]
Disclosure of geographical areas [line items]
Mineral stream interest	201,446	218,158	201,446	218,158
Gold interests [member] | Brazil [member]
Disclosure of geographical areas [line items]
Mineral stream interest	2,651,699	2,760,314	2,651,699	2,760,314
Gold interests [member] | Peru [member]
Disclosure of geographical areas [line items]
Mineral stream interest	113,964	120,024	113,964	120,024
Silver interests [member]
Disclosure of geographical areas [line items]
Sales	63,313	98,647	130,474	204,813
Mineral stream interest	1,804,941	1,894,655	1,804,941	1,894,655	$ 1,847,668
Silver interests [member] | Canada [member]
Disclosure of geographical areas [line items]
Mineral stream interest	32,861	35,546	32,861	35,546
Silver interests [member] | United States [member]
Disclosure of geographical areas [line items]
Mineral stream interest	557	433	557	433
Silver interests [member] | Mexico [member]
Disclosure of geographical areas [line items]
Mineral stream interest	383,702	396,458	383,702	396,458
Silver interests [member] | Greece [member]
Disclosure of geographical areas [line items]
Mineral stream interest	4,356	7,108	4,356	7,108
Silver interests [member] | Portugal [member]
Disclosure of geographical areas [line items]
Mineral stream interest	21,848	23,141	21,848	23,141
Silver interests [member] | Sweden [member]
Disclosure of geographical areas [line items]
Mineral stream interest	36,495	38,623	36,495	38,623
Silver interests [member] | Argentina / Chile [member]
Disclosure of geographical areas [line items]
Mineral stream interest	264,401	264,411	264,401	264,411
Silver interests [member] | Peru [member]
Disclosure of geographical areas [line items]
Mineral stream interest	1,060,721	1,128,935	1,060,721	1,128,935
Palladium interest [member]
Disclosure of geographical areas [line items]
Mineral stream interest	254,772		254,772
Palladium interest [member] | United States [member]
Disclosure of geographical areas [line items]
Mineral stream interest	254,772		254,772
Cobalt Interests [member]
Disclosure of geographical areas [line items]
Mineral stream interest	227,510	393,327	227,510	393,327
Cobalt Interests [member] | Canada [member]
Disclosure of geographical areas [line items]
Mineral stream interest	$ 227,510	$ 393,327	$ 227,510	$ 393,327

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - $ / shares	Aug. 08, 2019	Jun. 30, 2019
Disclosure of Events After Reporting Period [line items]
Declaration of quarterly dividend rate description		Under the Company's dividend policy, the quarterly dividend per common share is targeted to equal approximately 30% of the average cash flow generated by operating activities in the previous four quarters divided by the Company's then outstanding common shares, all rounded to the nearest cent
Dividend reinvested discount rate		3.00%
Major Ordinary Share Transactions [member]
Disclosure of Events After Reporting Period [line items]
Dividend per share	$ 0.09
Dividend payable, date of record	Aug. 23, 2019
Dividend reinvested discount rate	3.00%
Dividend payable date	Sep. 5, 2019
Quarterly dividend [member]
Disclosure of Events After Reporting Period [line items]
Dividend per share		$ 0.09