Wheaton Precious Metals (WPM) 6-K 15 Aug 18 2018 Q2 Wheaton Precious Metals Announces Second Quarter Results for 2018 and Declares Third Quarterly Dividend of 2018 Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2018shares
Document - Document and Entity Information [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	WPM
Entity Registrant Name	Wheaton Precious Metals Corp.
Entity Central Index Key	1,323,404
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding	443,559,922

Statements of Earnings

Statements of Earnings - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Profit or loss [abstract]
Sales		$ 212,400	$ 199,684	$ 411,652	$ 397,635
Cost of sales
Cost of sales, excluding depletion		62,580	56,981	118,994	115,272
Depletion		62,494	59,772	119,759	123,715
Total cost of sales		125,074	116,753	238,753	238,987
Gross margin		87,326	82,931	172,899	158,648
Other expenses (income)
General and administrative	[1]	11,972	9,069	21,729	16,967
Gain on disposal of mineral stream interest		(245,715)		(245,715)
Interest expense		5,659	6,482	11,249	12,854
Unrealized fair value losses (gains), net		295		2,165
Other income		(1,538)	(1,075)	(2,372)	(2,173)
Other expense		1,709	1,358	3,430	2,507
Foreign exchange loss (gain)		26	41	(143)	85
Total other expense (income)		(227,592)	15,875	(209,657)	30,240
Earnings before income taxes		314,918	67,056	382,556	128,408
Income tax recovery		3,224	556	3,709	428
Net earnings		$ 318,142	$ 67,612	$ 386,265	$ 128,836
Basic earnings per share		$ 0.72	$ 0.15	$ 0.87	$ 0.29
Diluted earnings per share		$ 0.72	$ 0.15	$ 0.87	$ 0.29
Weighted average number of shares outstanding
Basic		443,191	441,784	442,961	441,635
Diluted		443,770	442,370	443,453	442,168
[1]	Equity settled stock based compensation (a non-cash item) included in general and administrative expenses $ 1,394 $ 1,273 $ 2,643 $ 2,469

Statements of Earnings (Parenth

Statements of Earnings (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Equity settled stock based compensation (a non-cash item) included in general and administrative expenses	$ 1,394	$ 1,273	$ 2,643	$ 2,469
General and administrative expenses [member]
Equity settled stock based compensation (a non-cash item) included in general and administrative expenses	$ 1,394	$ 1,273	$ 2,643	$ 2,469

Condensed Interim Consolidated

Condensed Interim Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended								6 Months Ended				12 Months Ended
	Jun. 30, 2018		Mar. 31, 2018		Jun. 30, 2017		Mar. 31, 2017		Jun. 30, 2018	Dec. 31, 2017		Jun. 30, 2017	Dec. 31, 2017
Statement of comprehensive income [abstract]
Net earnings	$ 318,142		$ 68,123		$ 67,612		$ 61,224		$ 386,265	$ (71,134)		$ 128,836
Items that will not be reclassified to net earnings
Gain on long-term investments - common shares held	16,663				7,475				13,534			11,038
Deferred income tax expense	(3,233)				(722)				(3,691)			(457)	$ (1,091)
Total other comprehensive income	13,430	[1]	(3,586)	[1]	6,753	[1]	3,828	[1]	9,843	6,880	[1]	10,581
Total comprehensive income	$ 331,572		$ 64,537		$ 74,365		$ 65,052		$ 396,108	$ (64,254)		$ 139,417
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

Condensed Interim Consolidated5

Condensed Interim Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 92,661	$ 98,521
Accounts receivable	6,875	3,194
Other	3,580	1,700
Total current assets	103,116	103,415
Non-current assets
Mineral stream interests	5,785,795	5,423,277
Early deposit mineral stream interests	25,990	21,722
Mineral royalty interest	9,107	9,107
Long-term equity investments	261,172	95,732
Investment in associates	2,793	2,994
Convertible note receivable	13,723	15,777
Other	14,416	11,289
Total non-current assets	6,112,996	5,579,898
Total assets	6,216,112	5,683,313
Current liabilities
Accounts payable and accrued liabilities	20,008	12,118
Current portion of performance share units	1,638
Other	22	25
Total current liabilities	21,668	12,143
Non-current liabilities
Bank debt	956,500	770,000
Deferred income taxes	96	76
Performance share units	3,233	1,430
Total non-current liabilities	959,829	771,506
Total liabilities	981,497	783,649
Shareholders' equity
Issued capital	3,489,643	3,472,029
Reserves	87,819	77,007
Retained earnings	1,657,153	1,350,628
Total shareholders' equity	5,234,615	4,899,664
Total liabilities and shareholders' equity	6,216,112	5,683,313
Commitments and contingencies	$ 0	$ 0

Condensed Interim Consolidated6

Condensed Interim Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net earnings	$ 318,142	$ 67,612	$ 386,265	$ 128,836
Adjustments for Depreciation and depletion	62,727	60,016	120,232	124,202
Gain on disposal of mineral stream interest	(245,715)		(245,715)
Interest expense	5,659	6,482	11,249	12,854
Equity settled stock based compensation	1,394	1,273	2,643	2,469
Performance share units	3,316	(23)	3,500	(457)
Deferred income tax expense (recovery)	(3,253)	(820)	(3,760)	(705)
Loss on fair value adjustment of share purchase warrants held	12		111
Share in losses of associate			201
Fair value adjustment on convertible note receivable	283		2,054
Investment income recognized in net earnings	(681)	(87)	(1,266)	(163)
Other	287	135	513	(734)
Change in non-cash working capital	(1,791)	(3,466)	(4,894)	(8,929)
Cash generated from operations before interest paid and received	140,380	131,122	271,133	257,373
Interest paid	(5,459)	(6,513)	(11,055)	(12,902)
Interest received	279	72	462	133
Cash generated from operating activities	135,200	124,681	260,540	244,604
Financing activities
Bank debt repaid	(79,000)	(111,000)	(186,000)	(240,000)
Bank debt drawn	372,500		372,500
Credit facility extension fees	(5)	(5)	(1,205)	(1,305)
Share purchase options exercised	878	280	1,027	1,002
Dividends paid	(64,589)	(52,108)	(64,589)	(52,108)
Cash (used for) generated from financing activities	229,784	(162,833)	121,733	(292,411)
Investing activities
Mineral stream interests	(610,235)		(610,235)
Early deposit mineral stream interests	(4,255)	(15)	(4,458)	(894)
Proceeds on disposal of mineral stream interests	230,000		230,000	1,022
Acquisition of long-term investments	(1,016)		(1,016)
Dividend income received	20	15	40	30
Other	(2,384)	(32)	(2,425)	(86)
Cash used for investing activities	(387,870)	(32)	(388,094)	72
Effect of exchange rate changes on cash and cash equivalents	(21)	10	(39)	15
Decrease in cash and cash equivalents	(22,907)	(38,174)	(5,860)	(47,720)
Cash and cash equivalents, beginning of period	115,568	114,749	98,521	124,295
Cash and cash equivalents, end of period	$ 92,661	$ 76,575	$ 92,661	$ 76,575

Condensed Interim Consolidated7

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, 2016		$ 4,939,988		$ 3,445,914	$ 83,077	$ 26,063	$ 3,669	$ (57,508)	[1]	$ 55,301	$ 1,438,773
Balance, shares at beginning of period at Dec. 31, 2016		441,456,217	441,456,000
Total comprehensive income
Net earnings		$ 61,224									61,224
OCI	[1]	3,828						3,828		3,828
Total comprehensive income		65,052						3,828	[1]	3,828	61,224
DIT recovery (expense)	[1]	(152)		(152)
SBC expense	[1]	1,196				982	214			1,196
Options exercised	[1]	$ 776		968		(192)				(192)
Options exercised, shares		40,050	40,000
RSUs released	[1]			483			(483)			(483)
RSUs released, shares		20,750	21,000
Dividends (Note 19.2)		$ (30,906)									(30,906)
Balance end of period at Mar. 31, 2017		$ 4,975,954		3,447,213	83,077	26,853	3,400	(53,680)	[1]	59,650	1,469,091
Balance, shares at end of period at Mar. 31, 2017		441,517,017	441,517,000
Balance at beginning of period at Dec. 31, 2016		$ 4,939,988		3,445,914	83,077	26,063	3,669	(57,508)	[1]	55,301	1,438,773
Balance, shares at beginning of period at Dec. 31, 2016		441,456,217	441,456,000
Total comprehensive income
Net earnings		$ 128,836
OCI		10,581
Total comprehensive income		139,417
DIT recovery (expense)		(39)
Dividends (Note 19.2)											(61,832)
Balance end of period at Jun. 30, 2017		$ 5,030,728		3,457,319	83,077	27,489	3,993	(46,927)	[1]	67,632	1,505,777
Balance, shares at end of period at Jun. 30, 2017		442,005,404	442,005,000
Balance at beginning of period at Dec. 31, 2016		$ 4,939,988		3,445,914	83,077	26,063	3,669	(57,508)	[1]	55,301	1,438,773
Balance, shares at beginning of period at Dec. 31, 2016		441,456,217	441,456,000
Total comprehensive income
DIT recovery (expense)		$ 65
Balance end of period at Dec. 31, 2017		$ 4,899,664		$ 3,472,029	83,077	28,799	5,178	(40,047)	[1]	77,007	1,350,628
Balance, shares at end of period at Dec. 31, 2017		442,724,309	442,724,000	442,724,309
Balance at beginning of period at Mar. 31, 2017		$ 4,975,954		$ 3,447,213	83,077	26,853	3,400	(53,680)	[1]	59,650	1,469,091
Balance, shares at beginning of period at Mar. 31, 2017		441,517,017	441,517,000
Total comprehensive income
Net earnings		$ 67,612									67,612
OCI	[1]	6,753						6,753		6,753
Total comprehensive income		74,365						6,753	[1]	6,753	67,612
DIT recovery (expense)	[1]	113		113
SBC expense	[1]	1,273				680	593			1,273
Options exercised	[1]	$ 225		269		(44)				(44)
Options exercised, shares		13,000	13,000
Dividends (Note 19.2)		$ (21,202)		9,724							(30,926)
Dividends (Note 19.2), shares		475,387	475,000
Balance end of period at Jun. 30, 2017		$ 5,030,728		3,457,319	83,077	27,489	3,993	(46,927)	[1]	67,632	1,505,777
Balance, shares at end of period at Jun. 30, 2017		442,005,404	442,005,000
Total comprehensive income
Net earnings		$ (71,134)									(71,134)
OCI	[1]	6,880						6,880		6,880
Total comprehensive income		(64,254)						6,880	[1]	6,880	(71,134)
DIT recovery (expense)	[1]	104		104
SBC expense	[1]	2,582				1,375	1,207			2,582
Options exercised	[1]	$ 329		394		(65)				(65)
Options exercised, shares		17,550	18,000
RSUs released	[1]			22			(22)			(22)
RSUs released, shares		1,225
Dividends (Note 19.2)		$ (69,825)		14,190							(84,015)
Dividends (Note 19.2), shares		700,130	701,000
Balance end of period at Dec. 31, 2017		$ 4,899,664		$ 3,472,029	83,077	28,799	5,178	(40,047)	[1]	77,007	1,350,628
Balance, shares at end of period at Dec. 31, 2017		442,724,309	442,724,000	442,724,309
Total comprehensive income
Net earnings		$ 68,123									68,123
OCI	[1]	(3,586)						(3,586)		(3,586)
Total comprehensive income		64,537						(3,586)	[1]	(3,586)	68,123
DIT recovery (expense)	[1]	(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 (Note 19.2)		$ (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)	[1]	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)	[1]	77,007	1,350,628
Balance, shares at beginning of period at Dec. 31, 2017		442,724,309	442,724,000	442,724,309
Total comprehensive income
Net earnings		$ 386,265
OCI		9,843
Total comprehensive income		396,108
DIT recovery (expense)		(89)
Dividends (Note 19.2)		(838,000)									(79,739)
Balance end of period at Jun. 30, 2018		$ 5,234,615		$ 3,489,643	83,077	29,836	5,109	(30,203)	[1]	87,819	1,657,153
Balance, shares at end of period at Jun. 30, 2018		443,559,922	443,560,000	443,559,922
Balance at beginning of period at Mar. 31, 2018		$ 4,925,539		$ 3,473,443	83,077	29,450	4,303	(43,633)	[1]	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	[1]	13,430	318,142
DIT recovery (expense)	[1]	(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
Dividends (Note 19.2)		$ (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)	[1]	$ 87,819	$ 1,657,153
Balance, shares at end of period at Jun. 30, 2018		443,559,922	443,560,000	443,559,922
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "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, 2018
Text block1 [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. Including the agreements entered into after June 30, 2018 (Note 27), the Company has entered into 23 long-term purchase agreements (three of which are early deposit agreements), with 16 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 and 9 which are at various stages of development, located in 11 countries. Pursuant to the precious metal purchase agreements, Wheaton acquires metal production from the counterparties for an initial upfront payment plus an additional cash payment for each ounce 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, 2018 were authorized for issue as of August 14, 2018 in accordance with a resolution of the Board of Directors.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Basis of Presentation	2. Basis of Presentation 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, 2017 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, 2017. 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, 2018 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, 2018
Text block1 [abstract]
Significant Accounting Policies	3. Significant Accounting Policies 3.1. New Accounting Standards Effective in 2018 IFRS 9 – Financial Instruments (amended 2014): On January 1, 2018, the Company adopted IFRS 9 (2014) – Financial Instruments (amended 2014) (“IFRS 9 (2014)”). The Company had previously adopted IFRS 9 (2009) – Financial Instruments effective January 1, 2010. The adoption of IFRS 9 (2014) did not materially impact the accounting policies and methods of application relative to the Company’s financial instruments. IFRS 15 – Revenue from Contracts with Customers: On January 1, 2018, the Company adopted IFRS 15 – Revenue from Contracts with Customers (“IFRS 15”) which supersedes IAS 18 – Revenue (“IAS 18”). IFRS 15 establishes a single five-step model framework for determining the nature, amount, timing and uncertainty of revenue and cash flows arising from a contract with a customer. The standard is effective for annual periods beginning on or after January 1, 2018. IFRS 15 requires entities to recognize revenue when ‘control’ of goods or services transfers to the customer whereas the previous standard, IAS 18, required entities to recognize revenue when the ‘risks and rewards’ of the goods or services transfer to the customer. The Company concluded that there is no change in the timing of revenue recognition of its silver and gold credit sales and its silver and gold concentrate sales under IFRS 15 compared to the previous standard as the point of transfer of risks and rewards of the silver and gold and the transfer of control of the silver and gold occur at the same time. As such, no adjustment was required to the Company’s consolidated financial statements as at January 1, 2017 or for the year ended December 31, 2017. Additionally, IFRS 15 requires that variable consideration should only be recognized to the extent that it is highly probable that a significant reversal in the amount of cumulative revenue recognized will not occur. The Company concluded that the adjustments relating to the final assay results for the quantity of concentrate sold under the terms of the concentrate sales contracts are not significant and do not constrain the recognition of revenue. 3.2. Future Changes in Accounting Policies The IASB has issued the following new or amended standards: Standards required to be applied for periods beginning on or after January 1, 2019: • IFRS 16 – Leases: In January 2016, the IASB and the FASB completed its joint project to address concerns by users of financial statements in respect of reduced comparability between financial statements due to the different accounting treatment applied to operating leases as compared to finance leases by removing the distinction between operating leases and finance leases and rather having all leases accounted for as a finance lease, subject to limited exceptions for short-term leases and leases of low value assets. The Company is currently evaluating the impact of this standard and anticipates that upon adoption of this standard, its leases will be capitalized under the classification Right-of-Use • IFRIC 23 – Uncertainty over Income Tax Treatments: In June 2017, the IASB issued IFRIC 23 which is effective for periods beginning on or after January 1, 2019. 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 extent of the impact of the adoption of IFRIC 23 has not yet been determined. Early adoption of the above standards is permitted.

Key Sources of Estimation Uncer

Key Sources of Estimation Uncertainty and Critical Accounting Judgments	6 Months Ended
	Jun. 30, 2018
Text block1 [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 $5.8 billion at June 30, 2018. 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 precious metal purchase agreements. 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 precious metal purchase agreements. 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 judgement 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 The Company assesses each precious metal purchase agreement 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 precious metal purchase agreement 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 silver and gold has been extremely volatile over the past several years and should price levels decline in the future for an extended period of time, the Company may need to 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 16, the Company measures its convertible note receivable with Kutcho Copper Corp. 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 precious metal purchase agreement 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 25. 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 15 describes Kutcho Copper Corp. (“Kutcho”) as an associate though the Company only owns a 13% 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 shipments of metals 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 25 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 precious metal purchase agreements. 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.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
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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, 2018 (in thousands) Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 92,661 $ 92,661 $ — $ — Trade receivables from provisional concentrate sales, net of fair value adjustment 783 — 783 — Long-term investments - common shares held 261,159 261,159 — — Long-term investments - warrants held 13 — 13 — Convertible note receivable 13,723 — — 13,723 $ 368,339 $ 353,820 $ 796 $ 13,723 December 31, 2017 (in thousands) Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 98,521 $ 98,521 $ — $ — Trade receivables from provisional concentrate sales, net of fair value adjustment 1,398 — 1,398 — Long-term investments - common shares held 95,608 95,608 — — Long-term investments - warrants held 124 — 124 — Convertible note receivable 15,777 — — 15,777 $ 211,428 $ 194,129 $ 1,522 $ 15,777 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 silver and gold 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 16), 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 Unrealized Fair Value Losses (Gains), Net (Note 10). Management estimates that the market interest rate on similar borrowings without the conversion feature was approximately 15% and has used an implied volatility of 30% in valuing the convertibility feature. If (i) the market interest rate used had been 2% lower or higher at the respective balance sheet date; or (ii) the implied volatility used had been 10% higher or lower at the respective balance sheet date, then the value of the Kutcho Convertible Note receivable would have increased or decreased by approximately $1 million. Minto Derivative Liability In October 2017, in order to incentivize Capstone Mining Corp. to extend the Minto mine life, the Company agreed to amend the Minto precious metal purchase agreement. The primary modification is to increase 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. At June 30, 2018 and December 31, 2017, the Company estimated the fair value of this derivative liability to be $NIL as the long-term outlook for copper based on a consensus derived from a number of sources including analysts and other market observers exceeds $2.50 per pound over the duration of the anticipated remaining mine life.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2018
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Revenue	6. Revenue Three Months Ended Six Months Ended (in thousands) 2018 2017 2018 2017 Sales Silver Silver credit sales $ 87,620 41 % $ 95,799 48 % $ 182,109 44 % $ 170,228 43 % Concentrate sales 11,027 5 % 13,015 6 % 22,704 6 % 29,750 7 % $ 98,647 46 % $ 108,814 54 % $ 204,813 50 % $ 199,978 50 % Gold Gold credit sales $ 110,688 52 % $ 81,696 41 % $ 201,545 49 % $ 177,195 45 % Concentrate sales 3,065 2 % 9,174 5 % 5,294 1 % 20,462 5 % $ 113,753 54 % $ 90,870 46 % $ 206,839 50 % $ 197,657 50 % Total sales revenue $ 212,400 100 % $ 199,684 100 % $ 411,652 100 % $ 397,635 100 % Silver and Gold Credit Sales Under certain precious metal purchase agreements, silver and/or gold is acquired from the mine operator in the form of silver or gold credits, which is then sold through a network of third party brokers or dealers. Revenue from silver and gold credit sales is recognized at the time of the sale of such credits, which is also the date that control of the silver or gold is transferred to the customer. The Company will occasionally enter into forward contracts in relation to silver or gold deliveries that it is highly confident will occur within a given quarter. No forward contracts were outstanding at June 30, 2018 or December 31, 2017. 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 silver or gold. Concentrate Sales Under certain precious metal purchase agreements, silver and/or gold 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 silver or gold in concentrate form, final silver or gold 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 silver or gold. The contracts, in general, provide for a provisional payment based upon provisional assays and quoted silver and gold prices. Final settlement is based upon the average applicable price for the Quotational Period applied to the actual number of silver or gold 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 silver or gold 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, 2018
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General and Administrative	7. General and Administrative Three Months Ended Six Months Ended (in thousands) Note 2018 2017 2018 2017 Salaries and benefits Salaries and benefits, excluding PSUs $ 3,458 $ 3,120 $ 7,049 $ 6,345 PSUs 1 21.1 3,316 (23 ) 3,499 (457 ) Total salaries and benefits $ 6,774 $ 3,097 $ 10,548 $ 5,888 Depreciation 233 245 473 487 Donations 439 449 1,138 831 Professional fees 515 1,212 1,876 1,873 Other 2,617 2,793 5,051 5,419 Cash settled general and administrative $ 10,578 $ 7,796 $ 19,086 $ 14,498 Equity settled stock based compensation 2 Stock options 20.2 $ 584 $ 680 $ 1,235 $ 1,662 RSUs 20.3 810 593 1,408 807 Total equity settled stock based compensation $ 1,394 $ 1,273 $ 2,643 $ 2,469 Total general and administrative $ 11,972 $ 9,069 $ 21,729 $ 16,967 1) The PSU accrual related to the anticipated fair value of the PSUs issued uses a weighted average performance factor of 83% during the three and six months ended June 30, 2018 as compared to 14% during the comparable periods of 2017. 2) Equity settled stock based compensation is a non-cash

Other Income

Other Income	6 Months Ended
	Jun. 30, 2018
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Other Income	8. Other Income Three Months Ended Six Months Ended (in thousands) 2018 2017 2018 2017 Dividend income $ 19 $ 15 $ 39 $ 30 Interest income 661 72 1,227 133 Proceeds relative to the Mercator Minerals bankruptcy — — — 1,022 Guarantee fees - Primero Revolving Credit Facility 858 — 858 — Fees for contract amendments and reconciliations — 988 248 988 Total other income $ 1,538 $ 1,075 $ 2,372 $ 2,173 Proceeds relative to the Mercator Minerals bankruptcy During the three months ended March 31, 2017, the Company received an additional $1 million settlement related to the bankruptcy of Mercator Minerals Ltd. (“Mercator”) with whom Wheaton had a silver purchase agreement relative to Mercator’s Mineral Park mine in the United States (the “Mercator Bankruptcy”). This silver interest was fully written off during the year ended December 31, 2014 and as such further proceeds, if any, will be recognized as a component of net earnings. Guarantee fees - Primero Revolving Credit Facility On March 30, 2017, Wheaton provided a guarantee to the lenders under Primero Mining Corp.’s (“Primero”) previously outstanding revolving credit facility for which Primero paid a fee of 5% per annum (the “Guarantee”). The Guarantee was cancelled on May 10, 2018, being the date First Majestic Silver Corp. (“First Majestic”) completed the previously disclosed acquisition of all the issued and outstanding common shares of Primero.

Other Expense

Other Expense	6 Months Ended
	Jun. 30, 2018
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Other Expense	9. Other Expense Three Months Ended Six Months Ended (in thousands) Note 2018 2017 2018 2017 Stand-by 18.1 $ 974 $ 715 $ 1,891 $ 1,356 Agency fees 18.1 — — 50 50 Amortization of credit facility origination fees - undrawn facilities 18.1 245 179 476 340 Letter of guarantee 18.2 490 457 807 754 Share of losses of associate 15 — — 201 — Other — 7 5 7 Total other expense $ 1,709 $ 1,358 $ 3,430 $ 2,507

Unrealized Fair Value Losses (G

Unrealized Fair Value Losses (Gains), Net	6 Months Ended
	Jun. 30, 2018
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Unrealized Fair Value Losses (Gains), Net	10. Unrealized Fair Value Losses (Gains), Net Three Months Ended Six Months Ended (in thousands) Note 2018 2017 2018 2017 Loss on fair value adjustment of convertible note receivable 16 $ 283 $ — $ 2,054 $ — Loss on fair value adjustment of share purchase warrants held 17 12 — 111 — Total unrealized fair value losses (gains), net $ 295 $ — $ 2,165 $ —

Accounts Receivable

Accounts Receivable	6 Months Ended
	Jun. 30, 2018
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Accounts Receivable	11. Accounts Receivable (in thousands) Note June 30 December 31 Trade receivables from provisional concentrate sales, net of fair value adjustment 6 $ 783 $ 1,398 Other accounts receivables 6,092 1,796 Total accounts receivable $ 6,875 $ 3,194

Mineral Stream Interests

Mineral Stream Interests	6 Months Ended
	Jun. 30, 2018
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Mineral Stream Interests	12. Mineral Stream Interests Six Months Ended June 30, 2018 Cost Accumulated Depletion & Impairment 1 Carrying (in thousands) Balance Additions Disposal Balance Balance Depletion Disposal Balance Silver interests San Dimas $ 190,331 $ — $ (190,331 ) $ — $ (55,469 ) $ (3,575 ) $ 59,044 $ — $ — Peñasquito 524,626 — — 524,626 (121,376 ) (8,198 ) — (129,574 ) 395,052 Antamina 900,343 — — 900,343 (142,705 ) (24,659 ) — (167,364 ) 732,979 Constancia 302,948 — — 302,948 (41,145 ) (7,030 ) — (48,175 ) 254,773 Other 2 1,282,837 — — 1,282,837 (759,702 ) (11,284 ) — (770,986 ) 511,851 $ 3,201,085 $ — $ (190,331 ) $ 3,010,754 $ (1,120,397 ) $ (54,746 ) $ 59,044 $ (1,116,099 ) $ 1,894,655 Gold interests Sudbury 3 $ 623,864 $ — — $ 623,864 $ (243,876 ) $ (7,622 ) — $ (251,498 ) $ 372,366 Salobo 3,059,876 — — 3,059,876 (251,144 ) (48,418 ) — (299,562 ) 2,760,314 Constancia 136,058 — — 136,058 (14,007 ) (2,026 ) — (16,033 ) 120,025 San Dimas — 220,237 — 220,237 — (2,079 ) — (2,079 ) 218,158 Other 4 402,232 — — 402,232 (370,414 ) (4,868 ) — (375,282 ) 26,950 $ 4,222,030 $ 220,237 $ — $ 4,442,267 $ (879,441 ) $ (65,013 ) $ — $ (944,454 ) $ 3,497,813 Cobalt interests Voisey’s Bay $ — $ 393,327 — $ 393,327 $ — $ — — $ — $ 393,327 $ 7,423,115 $ 613,564 $ (190,331 ) $ 7,846,348 $ (1,999,838 ) $ (119,759 ) $ 59,044 $ (2,060,553 ) $ 5,785,795 1) Includes cumulative impairment charges to June 30, 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 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. 3) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 4) Comprised of the Minto, Rosemont and 777 gold interests. Year Ended December 31, 2017 Cost Accumulated Depletion & Impairment 1 Carrying (in thousands) Balance Reductions² Disposal 3 Balance Balance Depletion Disposal 3 Impairment Balance Silver interests San Dimas $ 190,331 $ — $ — $ 190,331 $ (49,756 ) $ (5,713 ) $ — $ — $ (55,469 ) $ 134,862 Peñasquito 524,626 — — 524,626 (106,549 ) (14,827 ) — — (121,376 ) 403,250 Antamina 900,343 — — 900,343 (84,537 ) (58,168 ) — — (142,705 ) 757,638 Constancia 302,948 — — 302,948 (26,977 ) (14,168 ) — — (41,145 ) 261,803 Other 3 1,329,731 (4,935 ) (41,959 ) 1,282,837 (544,161 ) (28,820 ) 41,959 (228,680 ) (759,702 ) 523,135 $ 3,247,979 $ (4,935 ) $ (41,959 ) $ 3,201,085 $ (811,980 ) $ (121,696 ) $ 41,959 $ (228,680 ) $ (1,120,397 ) $ 2,080,688 Gold interests Sudbury 4 $ 623,864 $ — $ — $ 623,864 $ (222,329 ) $ (21,547 ) $ — $ — $ (243,876 ) $ 379,988 Salobo 3,059,876 — — 3,059,876 (155,041 ) (96,103 ) — — (251,144 ) 2,808,732 Constancia 136,058 — — 136,058 (10,388 ) (3,619 ) — — (14,007 ) 122,051 Other 5 402,232 — — 402,232 (350,999 ) (19,415 ) — — (370,414 ) 31,818 $ 4,222,030 $ — $ — $ 4,222,030 $ (738,757 ) $ (140,684 ) $ — $ — $ (879,441 ) $ 3,342,589 $ 7,470,009 $ (4,935 ) $ (41,959 ) $ 7,423,115 $ (1,550,737 ) $ (262,380 ) $ 41,959 $ (228,680 ) $ (1,999,838 ) $ 5,423,277 1) Includes cumulative impairment charges to December 31, 2017 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) On March 29, 2017, the Company amended its silver purchase agreement with Alexco Resource Corp. (“Alexco”) to adjust the silver production payment so that it will be a percentage of the spot silver price that increases with lower mill silver head grades and lower silver prices, and decreases with higher mill silver head grades and higher silver prices, subject to certain ceiling and floor grades and prices. In addition, the outside completion date was extended to December 31, 2019 and the area of interest was expanded to include properties currently owned by Alexco and properties acquired by Alexco in the future which fall within a one kilometer radius of existing Alexco holdings in the Keno Hill Silver District. As consideration, on April 10, 2017, Alexco issued 3 million shares to Wheaton which had a fair value of $5 million. The fair value of these shares have been reflected as a reduction to the cost base of the Keno Hill silver interest. 3) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Cozamin, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Lagunas Norte, Pierina, Veladero, Rosemont and 777 silver interests. The Cozamin precious metal purchase agreement expired on April 4, 2017 and the fully depleted value of this contract has been reflected as a disposal. 4) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 5) Comprised of the Minto, Rosemont and 777 gold interests. 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, 2018 December 31, 2017 (in thousands) Depletable Non-Depletable Total Depletable Non-Depletable Total Silver interests San Dimas $ — $ — $ — $ 38,110 $ 96,752 $ 134,862 Peñasquito 290,524 104,528 395,052 293,968 109,282 403,250 Antamina 376,581 356,398 732,979 380,738 376,900 757,638 Constancia 239,525 15,248 254,773 240,950 20,853 261,803 Other 1 96,787 415,064 511,851 90,366 432,769 523,135 $ 1,003,417 $ 891,238 $ 1,894,655 $ 1,044,132 $ 1,036,556 $ 2,080,688 Gold interests Sudbury 2 $ 313,944 $ 58,422 $ 372,366 $ 315,421 $ 64,567 $ 379,988 Salobo 2,225,545 534,769 2,760,314 2,224,133 584,599 2,808,732 Constancia 110,881 9,144 120,025 112,432 9,619 122,051 San Dimas 111,148 107,010 218,158 — — — Other 3 26,950 — 26,950 31,818 — 31,818 $ 2,788,468 $ 709,345 $ 3,497,813 $ 2,683,804 $ 658,785 $ 3,342,589 Cobalt interests Voisey’s Bay $ — $ 393,327 $ 393,327 $ — $ — $ — $ 3,791,885 $ 1,993,910 $ 5,785,795 $ 3,727,936 $ 1,695,341 $ 5,423,277 1) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Cozamin, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Lagunas Norte, Pierina, Veladero, Rosemont and 777 silver interests. The Cozamin precious metal purchase agreement expired on April 4, 2017 while the Lagunas Norte, Pierina and Veladero silver interests expired on March 31, 2018. 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. 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 completed the previously disclosed 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 1 1 The First Majestic Shares represent approximately 11% of First Majestic’s current issued and outstanding shares and are subject to resale restrictions, including a six month hold period (subject to certain exceptions) with volume selling restrictions thereafter. (in thousands) Cash received $ 220,000 Fair value of First Majestic shares received 151,000 Fee from Goldcorp in exchange for release from the 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 Under the terms of the new San Dimas PMPA, for which the Company paid total upfront cash consideration of $220 million, 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. 1 Acquisition of the Voisey’s Bay Cobalt Interest On June 11, 2018, the Company entered into an agreement to acquire from Vale S.A. (“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. In addition, Wheaton will make ongoing payments of 18% of the spot price of cobalt per pound of cobalt delivered under the agreement until such time as the upfront cash payment is reduced to $NIL and 22% of the spot price of cobalt thereafter. Payable rates for cobalt in concentrate have generally been fixed at 93.3%. Deliveries under the contract are scheduled to begin effective January 1, 2021.

Early Deposit Mineral Stream In

Early Deposit Mineral Stream Interests	6 Months Ended
	Jun. 30, 2018
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Early Deposit Mineral Stream Interests	13. 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 25 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: Mine Attributable Early Deposit Mineral Stream Interests Location of Upfront 1 Upfront 1, 2 Total Silver Gold Term of Toroparu Sandspring Guyana $ 15,500 $ 138,000 $ 153,500 50 % 10 % Life of Mine Cotabambas Panoro Peru 6,250 133,750 140,000 100 % ³ 25 % ³ Life of Mine Kutcho Kutcho Canada 3,500 61,500 65,000 100 % 4 100 % 4 Life of Mine $ 25,250 $ 333,250 $ 358,500 1) Expressed in United States dollars, rounded to the nearest thousand; excludes closing costs. 2) Please refer to Note 25 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 66.67% of silver production and 16.67% of gold 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 silver and gold production for the life of mine. 1 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.

Mineral Royalty Interest

Mineral Royalty Interest	6 Months Ended
	Jun. 30, 2018
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Mineral Royalty Interest	14. 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 and at any time prior to August 7, 2019, Chesapeake may reacquire two-thirds 2 3 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, 2018
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Investment in Associate	15. Investment in Associate Kutcho Effective December 14, 2017, in connection with the Kutcho Early Deposit Agreement (Note 13), the Company participated in an equity financing undertaken by Kutcho Copper Corp. (“Kutcho”) acquiring, by way of private placement, 6,153,846 common shares and warrants to acquire an additional 3,076,923 common shares of Kutcho for total consideration of $3 million (Cdn$4 million). Additionally, the Company advanced to Kutcho $16 million (Cdn$20 million) in exchange for a subordinated secured convertible term debt loan agreement receivable bearing interest at 10% per annum (the “Kutcho Convertible Note”) (see Note 16). As at January 31, 2018, Kutcho had 47,770,378 shares issued and outstanding, resulting in Wheaton owning approximately 13% of Kutcho on a non-diluted non-fully non-diluted A summary of the carrying value of the Kutcho Investment in Associate and the losses recognized as a component of the Company’s net earnings during 2018 is presented below: Share of Associate Losses (in thousands) Carrying Three Months Six Months Carrying Investment in Associate - Kutcho $ 2,793 $ — $ (201 ) $ 2,994

Convertible Note Receivable

Convertible Note Receivable	6 Months Ended
	Jun. 30, 2018
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Convertible Note Receivable	16. 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 summary of the fair value of the Kutcho Convertible Note and the fair value changes recognized as a component of the Company’s net earnings during the three and six months ended June 30, 2018 is presented below: Fair Value Adjustment Loss (in thousands) Fair Value at Three Months Six Months Fair Value at Convertible Note Receivable - Kutcho $ 13,723 $ (283 ) $ (2,054 ) $ 15,777

Long-Term Equity Investments

Long-Term Equity Investments	6 Months Ended
	Jun. 30, 2018
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Long-Term Equity Investments	17. Long-Term Equity Investments (in thousands) June 30 December 31 Common shares held $ 261,159 $ 95,608 Warrants held 13 124 $ 261,172 $ 95,732 Common Shares Held Fair Value Adjustment Gains (in thousands) Fair Value at Three Months Six Months Fair Value at Bear Creek $ 17,829 $ (5,831 ) $ (3,528 ) $ 21,358 Sabina 13,505 (831 ) (7,665 ) 21,171 Arizona Mining 46,780 15,370 19,199 27,581 First Majestic 159,578 8,578 8,578 — Other 23,467 (623 ) (3,050 ) 25,498 Total common shares held $ 261,159 $ 16,663 $ 13,534 $ 95,608 Fair Value Adjustment Gains (in thousands) Fair Value at Three Months Six Months Bear Creek $ 21,465 $ (1,236 ) $ (1,752 ) Sabina 18,032 4,506 9,492 Arizona Mining 21,962 5,823 3,714 Other 19,136 (1,618 ) (416 ) Total common shares held $ 80,595 $ 7,475 $ 11,038 Warrants Held Fair Value Adjustment Gain (Loss) (in thousands) Fair Value at Three Months Six Months Fair Value at Warrants held - Kutcho $ 13 $ (12 ) $ (111 ) $ 124 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 Unrealized Fair Value Losses (Gains), Net. 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. Acquisitions of Long-Term Investments In connection with the termination of the San Dimas SPA (Note 12), on May 10, 2018, the Company received 20,914,590 First Majestic common shares with a fair value of $151 million 1 Disposal of Long-Term Investments As announced by Arizona Mining Inc. and South32 Limited on August 10, 2018, South32 has completed its acquisition of all of the issued and outstanding common shares of Arizona Mining. As a result, subsequent to June 30, 2018, the Company has disposed of its investment in Arizona Mining and will receive cash consideration for its investment in accordance with the terms of the acquisition.

Credit Facilities

Credit Facilities	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Credit Facilities	18. Credit Facilities 18.1. Bank Debt (in thousands) June 30 December 31 Current portion $ — $ — Long-term portion 956,500 770,000 Gross bank debt outstanding 1 $ 956,500 $ 770,000 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. Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Interest Expense During Period Average principle outstanding during period $ 657,144 $ 1,024,166 $ 687,516 $ 1,065,683 Average effective interest rate during period 3.44 % 2.53 % 3.27 % 2.41 % Total interest expense incurred during period $ 5,659 $ 6,482 $ 11,249 $ 12,854 On February 27, 2018, 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, 2023. The Company incurred fees of $1.2 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, 2018. 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 1 The First Majestic Shares represent approximately 11% of First Majestic’s current issued and outstanding shares and are subject to resale restrictions, including a six month hold period (subject to certain exceptions) with volume selling restrictions thereafter. 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 As more fully disclosed in Note 25, 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 $146 million (Cdn$192 million). On March 15, 2017 and 2018, additional letters of guarantee in the amount of $8 million (Cdn$11 million) and $8 million (Cdn$10 million), respectively, were delivered to the CRA as security for additional estimated interest for the respective following year. The Letters of Guarantee, which renew annually and have no set expiry date, carry an annual fee of 100 basis points.

Issued Capital

Issued Capital	6 Months Ended
	Jun. 30, 2018
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Issued Capital	19. Issued Capital (US dollars in thousands) Note June 30 2018 December 31 Issued capital Share capital issued and outstanding: 443,559,922 common shares 19.1 $ 3,489,643 $ 3,472,029 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, 2018, the Company had no preference shares outstanding. A continuity schedule of the Company’s issued and outstanding common shares from January 1, 2017 to June 30, 2018 is presented below: Number Weighted At January 1, 2017 441,456,217 Share purchase options exercised 1 40,050 Cdn$ 25.65 Restricted share units released 1 20,750 $ 0.00 At March 31, 2017 441,517,017 Share purchase options exercised 1 13,000 Cdn$ 23.61 Dividend reinvestment plan 2 475,387 US$ 20.46 At June 30, 2017 442,005,404 Restricted share units released 1 1,225 US$ 0.00 Share purchase options exercised 1 17,550 Cdn$ 23.87 Dividend reinvestment plan 2 700,130 US$ 20.27 At December 31, 2017 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 $ 0.00 Dividend reinvestment plan 2 718,453 US$ 21.09 At June 30, 2018 443,559,922 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 2018 2017 2018 2017 Dividends declared per share $ 0.09 $ 0.07 $ 0.18 $ 0.14 Average number of shares eligible for dividend 443,197 441,798 442,996 441,658 Total dividends paid $ 39,888 $ 30,926 $ 79,739 $ 61,832 Paid as follows: Cash $ 32,475 $ 26,818 $ 64,579 $ 52,101 DRIP 2 7,413 4,108 15,160 9,731 Total dividends paid $ 39,888 $ 30,926 $ 79,739 $ 61,832 Shares issued under the DRIP 347,461 207,405 718,453 475,387 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, 2018, cumulative dividends of $838 million have been declared and paid by the Company.

Reserves

Reserves	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Reserves	20. Reserves (in thousands) Note June 30 2018 December 31 Reserves Share purchase warrants 20.1 $ 83,077 $ 83,077 Share purchase options 20.2 29,836 28,799 Restricted share units 20.3 5,109 5,177 Long-term investment revaluation reserve, net of tax 20.4 (30,203 ) (40,047 ) Total reserves $ 87,819 $ 77,006 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 2018 2017 2018 2017 Black-Scholes weighted average assumptions Grant date share price and exercise price Cdn$ 27.96 Cdn$ 27.60 Cdn$ 26.25 Cdn$ 27.51 Expected dividend yield 1.65 % 1.21 % 1.73 % 1.14 % Expected volatility 35 % 35 % 35 % 36 % Risk-free interest rate 2.37 % 0.73 % 1.91 % 0.92 % Expected option life, in years 2.5 2.5 2.5 2.5 Weighted average fair value per option granted Cdn$ 6.00 Cdn$ 5.68 Cdn$ 5.49 Cdn$ 5.87 Number of options issued during the period 3,880 1,820 549,210 486,920 Total fair value of options issued (000’s) $ 18 $ 8 $ 2,347 $ 2,143 A continuity schedule of the Company’s share purchase options reserve from January 1, 2017 to June 30, 2018 is presented below: (in thousands) Share At January 1, 2017 $ 26,063 Recognition of fair value of share purchase options issued 982 Share purchase options exercised (192 ) At March 31, 2017 $ 26,853 Recognition of fair value of share purchase options issued 680 Share purchase options exercised (44 ) At June 30, 2017 $ 27,489 Recognition of fair value of share purchase options issued 1,375 Share purchase options exercised (65 ) At December 31, 2017 $ 28,799 Recognition of fair value of share purchase options issued 651 At March 31, 2018 $ 29,450 Recognition of fair value of share purchase options issued 584 Share purchase options exercised (198 ) At June 30, 2018 $ 29,836 At June 30, 2018, there were 3,887,850 share purchase options outstanding with a weighted average exercise price of Cdn$25.58 per option. For the comparable period in 2017, there were 4,254,870 share purchase options outstanding with a weighted average exercise price of Cdn$26.89 per option. A continuity schedule of the Company’s outstanding share purchase options from January 1, 2017 to June 30, 2018 is presented below: Number of Weighted At January 1, 2017 4,097,400 Cdn$ 27.36 Granted (fair value - $2 million or Cdn$5.87 per option) 485,100 27.51 Exercised (40,050 ) 25.65 Expired (35,000 ) 32.40 At March 31, 2017 4,507,450 Cdn$ 27.32 Granted (fair value - Cdn$5.68 per option) 1,820 27.60 Exercised (13,000 ) 23.61 Expired (241,400 ) 34.81 At June 30, 2017 4,254,870 Cdn$ 26.89 Granted (fair value - Cdn$5.53 per option) 21,440 24.11 Exercised (17,550 ) 23.87 Expired (20,000 ) 36.90 Forfeited (6,500 ) 27.51 At December 31, 2017 4,232,260 Cdn$ 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$5.83 per option) 3,880 27.96 Exercised (46,800 ) 24.28 Expired (15,000 ) 30.19 Forfeited (2,820 ) 26.98 At June 30, 2018 3,887,850 Cdn$ 25.58 As it relates to share purchase options, during the six months ended June 30, 2018, the weighted average share price at the time of exercise was Cdn$28.10 per share, with all exercises taking place during the six months ended June 30, 2018. During the three months ended June 30, 2017, the weighted average share price at the time of exercise was Cdn$29.08 per share (six months - Cdn$27.87 per share). 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 reserve from January 1, 2017 to June 30, 2018 is presented below: (in thousands) Restricted At January 1, 2017 $ 3,669 Recognition of fair value of RSUs issued 214 Restricted share units released (483 ) At March 31, 2017 $ 3,400 Recognition of fair value of RSUs issued 593 At June 30, 2017 $ 3,993 Recognition of fair value of RSUs issued 1,207 Restricted share units released (22 ) At December 31, 2017 $ 5,178 Recognition of fair value of RSUs issued 598 Restricted share units released (1,473 ) At March 31, 2018 $ 4,303 Recognition of fair value of RSUs issued 810 Restricted share units released (4 ) At June 30, 2018 $ 5,109 During the three months ended June 30, 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). For the same period in 2017, the Company issued 370 RSUs with a fair value of Cdn$27.60 per RSU (six months - 140,780 RSUs with a fair value of $3 million or Cdn$27.51 per RSU). As of June 30, 2018, there were 403,951 RSUs outstanding. For the comparable period in 2017, there were 311,411 RSUs outstanding. 20.4. Long-Term Investment Revaluation Reserve The Company’s long-term investments in common shares (Note 17) are held for long-term strategic purposes and not for trading purposes. Upon the application of IFRS 9, Financial Instruments, the Company has chosen to designate these long-term investments in common shares as financial assets with fair value adjustments being recorded as a component of OCI as it believes that this provides a more meaningful presentation for long-term strategic investments, rather than reflecting changes in fair value as a component of net earnings. As some of these long-term investments are denominated in Canadian dollars, changes in their fair value is affected by both the change in share price in addition to changes in the Cdn$/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, 2017 to June 30, 2018 is presented below: (in thousands) Change in Deferred Tax Total At January 1, 2017 $ (56,662 ) $ (846 ) $ (57,508 ) Unrealized gain (loss) on LTIs 1 3,563 265 3,828 At March 31, 2017 $ (53,099 ) $ (581 ) $ (53,680 ) Unrealized gain (loss) on LTIs 1 7,475 (722 ) 6,753 At June 30, 2017 $ (45,624 ) $ (1,303 ) $ (46,927 ) Unrealized gain (loss) on LTIs 1 7,513 (633 ) 6,880 At December 31, 2017 $ (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 ) 1) LTIs refers to long-term investments in common shares held.

Stock Based Compensation

Stock Based Compensation	6 Months Ended
	Jun. 30, 2018
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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 silver and gold. 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, 2018, the Company issued 1,590 PSUs (six months - 220,260 PSUs). For the comparable period of the previous year, the Company issued 730 PSUs (six months - 196,890 PSUs). A continuity schedule of the Company’s outstanding PSUs (assuming a performance factor of 100% is achieved over the performance period) from January 1, 2017 to June 30, 2018 is presented below: Number of At January 1, 2017 717,564 Granted 196,160 Paid 1 (271,810 ) At March 31, 2017 641,914 Granted 730 Dividend equivalent participation 4,004 At June 30, 2017 646,648 Granted 10,330 Dividend equivalent participation 6,300 Paid 1 (3,629 ) Forfeited (3,050 ) At December 31, 2017 656,599 Granted 218,670 Paid 1 (221,663 ) At March 31, 2018 653,606 Granted 1,590 Forfeited (2,517 ) At June 30, 2018 652,679 1) The PSUs paid out during the period had a performance factor of 0% resulting in a cash disbursement of $Nil.

Earnings per Share ("EPS") and

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS")	6 Months Ended
	Jun. 30, 2018
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) 2018 2017 2018 2017 Basic weighted average number of shares outstanding 443,191 441,784 442,961 441,635 Effect of dilutive securities Share purchase options 175 275 131 277 Restricted share units 404 311 361 256 Diluted weighted average number of shares outstanding 443,770 442,370 443,453 442,168 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$26.46 (six months - Cdn$26.01), compared to Cdn$27.46 (six months - Cdn$27.48) for the comparable period in 2017. Three Months June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Share purchase options 827 1,392 1,983 1,392 Share purchase warrants 10,000 10,000 10,000 10,000 Total 10,827 11,392 11,983 11,392

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Supplemental Cash Flow Information	23. Supplemental Cash Flow Information Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Change in non-cash Accounts receivable $ (4,682 ) $ (510 ) $ (3,831 ) $ (1,459 ) Accounts payable and accrued liabilities 4,975 (2,119 ) 817 (6,701 ) Other (2,084 ) (837 ) (1,880 ) (769 ) Total change in non-cash $ (1,791 ) $ (3,466 ) $ (4,894 ) $ (8,929 )

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
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Income Taxes	24. Income Taxes Income tax recognized in net earnings is comprised of the following: Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Current income tax expense related to foreign jurisdictions $ 29 $ 264 $ 51 $ 277 Deferred income tax expense (recovery) related to: Origination and reversal of temporary differences $ 845 $ 810 $ 1,891 $ 1,577 Reversal of a write down of previously recognized temporary differences (4,098 ) (1,630 ) (5,651 ) (2,282 ) Total deferred income tax expense (recovery) $ (3,253 ) $ (820 ) $ (3,760 ) $ (705 ) Income tax expense (recovery) recognized in net earnings $ (3,224 ) $ (556 ) $ (3,709 ) $ (428 ) Income tax recognized as a component of OCI is comprised of the following: Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Deferred income tax expense (recovery) related to LTIs - common shares held $ 3,233 $ 722 $ 3,691 $ 457 Deferred income tax expense (recovery) recognized in OCI $ 3,233 $ 722 $ 3,691 $ 457 Income tax recognized directly in equity is comprised of the following: Three Months Ended June 30 Six Months June 30 (in thousands) 2018 2017 2018 2017 Deferred income tax expense (recovery) related to: Write down of previously recognized temporary differences $ 30 $ (113 ) $ 89 $ 39 Deferred income tax expense (recovery) recognized in equity $ 30 $ (113 ) $ 89 $ 39 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 Six Months Ended (in thousands) 2018 2017 2018 2017 Earnings before income taxes $ 314,918 $ 67,056 $ 382,556 $ 128,408 Canadian federal and provincial income tax rates 1 27.00 % 26.00 % 27.00 % 26.00 % Income tax expense based on above rates $ 85,028 $ 17,434 $ 103,290 $ 33,386 Non-deductible 1,128 627 1,915 1,118 Differences in tax rates in foreign jurisdictions (86,764 ) (17,907 ) (106,925 ) (34,979 ) Current period unrecognized temporary differences 1,482 920 3,662 2,329 Write down (reversal of write down) of previously recognized temporary differences (4,098 ) (1,630 ) (5,651 ) (2,282 ) Income tax expense (recovery) $ (3,224 ) $ (556 ) $ (3,709 ) $ (428 ) 1) Effective January 1, 2018, the BC corporate tax rate increased from 11% to 12%, resulting in the Company’s statutory tax rate increasing to 27% for years 2018 and beyond. 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. Refer to Note 25 for more information. The recognized deferred income tax assets and liabilities are offset on the balance sheet. The movement in deferred income tax assets and liabilities for the six months ended June 30, 2018 and the year ended December 31, 2017 is shown below: Six Months Ended June 30, 2018 Recognized deferred income tax assets and liabilities Opening Recovery Recovery Recovery Closing Deferred tax assets Non-capital $ 3,848 $ 64 $ — $ 9 $ 3,921 Capital losses 1,965 3,662 — — 5,627 Other 147 132 — — 279 Deferred tax liabilities Interest capitalized for accounting (87 ) — — — (87 ) Financing fees (375 ) (107 ) — (98 ) (580 ) Convertible note receivable (29 ) 29 — — — Long-term investments (1,937 ) — (3,691 ) — (5,628 ) Mineral stream interests (3,532 ) — — — (3,532 ) Other (76 ) (20 ) — — (96 ) Total $ (76 ) $ 3,760 $ (3,691 ) $ (89 ) $ (96 ) Year Ended December 31, 2017 Recognized deferred income tax assets and liabilities Opening Recovery Recovery Recovery Closing Deferred tax assets Non-capital $ 3,508 $ 299 $ — $ 41 $ 3,848 Capital losses 846 1,119 — — 1,965 Other 43 104 — — 147 Deferred tax liabilities Interest capitalized for accounting (84 ) (3 ) — — (87 ) Financing fees 173 (572 ) — 24 (375 ) Convertible note receivable — (29 ) — — (29 ) Long-term investments (846 ) — (1,091 ) — (1,937 ) Mineral stream interests (3,640 ) 108 — — (3,532 ) Other (262 ) 186 — — (76 ) Total $ (262 ) $ 1,212 $ (1,091 ) $ 65 $ (76 ) Deferred income tax assets in Canada not recognized are shown below: June 30 December 31 Non-capital $ 36,309 $ 32,388 Financing fees 6,058 7,451 Mineral stream interests 68,834 70,514 Other 2,017 1,366 Capital losses 6,694 10,356 Convertible note receivable 248 — Unrealized losses on long-term investments 9,707 7,828 Total $ 129,867 $ 129,903

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
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Commitments and Contingencies	25. Commitments and Contingencies Mineral Stream Interests The following table summarizes the Company’s commitments to make per-ounce Attributable Payable Per Unit of Measurement Cash Payment 1, 2 Term of Date of Mineral Stream Interests Silver Gold Palladium Cobalt Silver Gold Palladium Cobalt San Dimas 0 % ³ 50 % ³ 0 % 0 % n/a $ 600 $ n/a $ n/a Life of Mine 10-May-18 Peñasquito 25 % 0 % 0 % 0 % $ 4.17 n/a n/a n/a Life of Mine 24-Jul-07 Salobo 0 % 75 % 0 % 0 % n/a $ 400 n/a n/a Life of Mine 28-Feb-13 Sudbury 0 % 70 % 0 % 0 % n/a $ 400 n/a n/a 20 years 28-Feb-13 Antamina 33.75 % 0 % 0 % 0 % variable 4 n/a n/a n/a Life of Mine 3-Nov-15 Constancia 100 % 50 % 5 0 % 0 % $ 5.90 6 $ 400 6 n/a n/a Life of Mine 8-Aug-12 Stillwater 0 % 100 % 4.5 % 7 0 % n/a variable 8 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 100 % 0 % 0 % 0 % $ 4.34 n/a n/a n/a 25 years 15-Oct-04 Zinkgruvan 100 % 0 % 0 % 0 % $ 4.34 n/a n/a n/a Life of Mine 8-Dec-04 Yauliyacu 100 % ¹¹ 0 % 0 % 0 % $ 8.85 ¹² n/a n/a n/a Life of Mine 23-Mar-06 Stratoni 100 % 0 % 0 % 0 % $ 6.77 ¹³ n/a n/a n/a Life of Mine 23-Apr-07 Minto 100 % 100 % 14 0 % 0 % $ 4.18 $ 322 15 n/a n/a Life of Mine 20-Nov-08 Neves-Corvo 100 % 0 % 0 % 0 % $ 4.26 n/a n/a n/a 50 years 5-Jun-07 Aljustrel 100 % 16 0 % 0 % 0 % variable 17 n/a n/a n/a 50 years 5-Jun-07 Keno Hill 25 % 0 % 0 % 0 % variable 18 n/a n/a n/a Life of Mine 2-Oct-08 Pascua-Lama 25 % 0 % 0 % 0 % $ 3.90 n/a n/a n/a Life of Mine 8-Sep-09 Rosemont 100 % 100 % 0 % 0 % $ 3.90 $ 450 n/a n/a Life of Mine 10-Feb-10 Loma de La Plata 12.5 % 0 % 0 % 0 % $ 4.00 n/a n/a n/a Life of Mine n/a 19 777 100 % 50 % 0 % 0 % $ 6.14 6 $ 416 6 n/a n/a Life of Mine 8-Aug-12 Early Deposit Toroparu 50 % 10 % 0 % 0 % $ 3.90 $ 400 n/a n/a Life of Mine 11-Nov-13 Cotabambas 100 % 20 25 % 20 0 % 0 % $ 5.90 $ 450 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) Under the terms of the San Dimas precious metal purchase agreement, 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. 4) The Company is committed to pay Glencore 20% of the spot price of silver for each ounce of silver delivered under the Antamina silver purchase agreement. 5) 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. 6) Subject to an increase to $9.90 per ounce of silver and $550 per ounce of gold after the initial 40-year 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 life of mine. 8) The Company is committed to pay Sabanye 18% of the spot price of gold and palladium for each ounce of gold and palladium delivered under the Stillwater precious metal purchase agreement until such time as the upfront cash payment is reduced to $NIL 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 such time as the upfront cash payment is reduced to $NIL, 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 $8.85 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 $18.85 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 silver purchase agreement. 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 10,000 meters of Expansion Drilling in July 2018. 14) The Company is committed to acquire 100% of the first 30,000 ounces of gold produced per annum and 50% thereafter. 15) 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. 16) Wheaton only has the rights to silver contained in concentrate containing less than 15% copper at the Aljustrel mine. 17) During the second quarter of 2018, the Company agreed to amend the precious metal purchase agreement with Almina to increase the production payments to 50% of the amount received under the respective concentrate sales contracts and to fix silver payable rates for a period of two years and limit rate decreases thereafter. 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 silver and gold production for the life of mine. 22) The Company is committed to pay Kutcho 20% of the spot price of silver and gold for each ounce of silver and gold delivered under the Kutcho Early Deposit Agreement. Other Contractual Obligations and Contingencies Obligations With Scheduled Payment Dates (in thousands) 2018 2019 - 2021 2022 - 2023 After 2023 Sub-Total Other Total Bank debt 1 $ — $ — $ 956,500 $ — $ 956,500 $ — $ 956,500 Interest 2 17,558 122,593 47,466 — 187,617 — 187,617 Mineral stream interest payments 3 Rosemont 4 — — — — — 231,150 231,150 Loma de La Plata — — — — — 32,400 32,400 Toroparu — — — — — 138,000 138,000 Cotabambas 750 4,500 2,500 — 7,750 126,000 133,750 Kutcho 3,500 — — — 3,500 58,000 61,500 Stillwater 5 502,500 — — — 502,500 — 502,500 Operating leases 634 3,262 1,728 1,148 6,772 — 6,772 Total contractual obligations $ 524,942 $ 130,355 $ 1,008,194 $ 1,148 $ 1,664,639 $ 585,550 $ 2,250,189 1) At June 30, 2018, the Company had $957 million 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, 2018 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. 5) Includes contingent transaction costs of $3 million Rosemont In connection with the Rosemont precious metal purchase agreement, the Company is committed to pay Hudbay total upfront cash payments of $230 million on an installment basis to partially fund construction of the Rosemont mine once certain milestones are achieved, including the receipt of key permits and securing the necessary financing to complete construction of the mine. Loma de La Plata In connection with the Loma de La Plata precious metal purchase agreement, 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, 2018 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 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 $6 million has been paid to date. Once certain conditions have been met, the Company will advance an additional $8 million to Panoro, spread over up to seven 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 $3.5 million has been paid to date. Once certain conditions have been met, the Company will advance an additional $3.5 million to Kutcho. 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”). If actual throughput is expanded above 28 Mtpa within a predetermined period, and depending on the grade of material processed, Wheaton will be required to make an additional payment to Vale based on a set fee schedule ranging 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. Stillwater On July 25, 2018, in connection with the Stillwater precious metal purchase agreement (Note 27), the Company paid to Sibanye a total upfront cash payment of $500 million. Taxes 2013 Taxation Year: Domestic On July 24, 2018, the Company received a Notice of Reassessment for the 2013 taxation year (“the 2013 Domestic Reassessment”) in which the Canada Revenue Agency (“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 Management believes the Company’s position is the correct one, and that it has filed its tax returns and paid applicable taxes in compliance with Canadian tax law. Wheaton intends to file a notice of objection within the 90-day . The CRA is conducting a domestic audit for the 2014 and 2015 taxation years. The 2016 and 2017 taxation years remain open to a domestic audit. If CRA were to reassess the Company’s Canadian PMPAs for the 2014-2017 taxation years on the same basis as CRA has reassessed the Company in the 2013 Domestic Reassessment, the Company estimates that it would not result in a material amount of additional tax, interest, and penalties. 2005 – 2010 Taxation Years: Canada Revenue Agency Dispute On September 24, 2015, the Company received Notices of Reassessment (the “Reassessments”) from the CRA totaling $268 million (Cdn$353 million) for federal and provincial tax, transfer pricing penalties, interest and other penalties for the 2005-2010 taxation years. The CRA’s position in the Reassessments is that the transfer pricing provisions of the Act relating to income earned by the Company’s foreign subsidiaries outside of Canada should apply such that the income of Wheaton subject to tax in Canada should be increased by an amount equal to substantially all of the income earned outside of Canada by the Company’s foreign subsidiaries for the 2005-2010 taxation years. Management believes that the Company has filed its tax returns and paid applicable taxes in compliance with Canadian tax law, and as a result no amounts have been recorded for any potential liability arising from this matter. Wheaton is vigorously defending its tax filing positions. On January 8, 2016, the Company commenced an appeal in the Tax Court of Canada. The Company was required to make a deposit of 50% of the reassessed amounts of tax, interest and penalties. Instead of making this deposit in cash, on March 15, 2016, the Company posted security in the form of a letter of guarantee in the amount of $146 million (Cdn$192 million), which included interest accrued to March 2016 plus estimated interest for the following year. In March 2017 and 2018, additional letters of guarantee in the amounts of $8 million (Cdn$11 million) and $8 million (Cdn$10 million), respectively, were delivered to the CRA as security for additional estimated interest for the respective following year. The Company is currently in the discovery phase of the appeal, with a trial scheduled to commence mid-September 2011 – 2015 Taxation Years: Audit of International Transactions The CRA has also commenced an audit of the Company’s international transactions covering the 2011-2015 taxation years, which is currently ongoing. The Company has not received any proposal or notices of reassessment for the 2011-2015 taxation years in connection with this audit. For ease of reference, the following provides an overview of the current status of CRA matters relating to income earned by the Company’s foreign subsidiaries outside of Canada: Taxation Years CRA Position/Status Potential Income Inclusion Potential Income Tax Payable (1) Payments Made Timing 2005-2010 Transfer pricing provisions of the Act should apply such that Wheaton’s income subject to tax in Canada should be increased by an amount equal to substantially all of the income earned outside of Canada by Wheaton’s foreign subsidiaries. CRA has reassessed Wheaton and is seeking to increase Wheaton’s income subject to tax in Canada by Cdn$715 million. CRA has reassessed Wheaton and is seeking to impose income tax of $153 million (Cdn$201 (2),(3) Wheaton has posted security in the form of letters of guarantee totaling $162 million (Cdn$213 million) reflecting 50% of all assessed tax, penalties and interest accrued to March 15, (3),(4) An appeal in the Tax Court of Canada commenced January 8, 2016. Trial scheduled to commence mid-September 2011-2015 CRA commenced an audit of 2011-2015 taxation years. CRA has not If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to increase Wheaton’s income subject to tax in Canada by approximately $1.9 billion. (5), (8) If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to impose income tax of approximately $384 million (Cdn$505 (5), (6), (8) N/A Time to complete CRA audit unknown. 2016-2017 Remains open to audit by CRA. If CRA were to audit and then reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to increase Wheaton’s income subject to tax in Canada by approximately $580 million. (5), (8) If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to impose income tax of approximately $149 million (Cdn$197 (5),(7),(8) N/A N/A 1) For the taxation years ended after December 31, 2010, the Company files its Canadian tax returns in US dollars. However, taxes payable, if any, are payable in Canadian dollars based on the exchange rate applicable on the original payment due date. As a result, the US dollar amounts reflected in the table above are subject to fluctuations in the value of the Canadian dollar relative to the US dollar. Canadian dollar amounts in this table have been converted to US dollars at the exchange rate applicable at the balance sheet date as quoted by the Bank of Canada. 2) For the 2005-2010 taxation years, transfer pricing penalties of $54 million (Cdn$72 million) and interest and other penalties of $61 million (Cdn$81 million) were also assessed by the CRA. The total reassessment issued on September 24, 2015 was $268 million (Cdn$353 million). Additional interest accruing to December 31, 2017 on the total amount reassessed is estimated at $34 million (Cdn$45 million) for the 2005-2010 taxation years. 3) As a consequence of the CRA’s reassessment of the 2005-2010 taxation years and the 2013 Domestic Reassessment, CRA reassessed the 2011 and 2012 taxation years to amend the non-capital losses available to offset the taxable income of $12 million and $14 million, respectively. As a result of the 2013 Domestic Reassessment, additional tax, interest, and penalties of about $1.6 million (Cdn$2.2 million) was owing for the 2011 and 2012 taxation years. The Company will be filing Notices of Objection with respect to these reassessments and accordingly, the Company will be required to pay 50% of the additional amounts owing. These reassessments do not relate to the CRA international audit of the 2011-2015 taxation years. 4) Estimates of interest given as of the date stated. Interest accrues until payment date. 5) The estimates of income inclusion and tax payable are computed on the basis that the cost of precious metal acquired under the PMPAs is equal to the cash cost plus an amortized amount of the up-front non-capital 6) If CRA were to reassess the 2011-2015 taxation years and continue to apply transfer pricing penalties, management estimates that transfer pricing penalties of approximately $187 million and interest (calculated to December 31, 2017) and other penalties of approximately $110 million (Cdn$145 million) may be applicable for the 2011-2015 taxation years. 7) If CRA were to reassess the 2016-2017 taxation years and continue to apply transfer pricing penalties, management estimates that transfer pricing penalties of approximately $58 million and interest (calculated to December 31, 2017) and other penalties of approximately $9 million (Cdn$12 million) may be applicable for the 2016-2017 taxation years. 8) If the cost of precious metal acquired under the PMPAs is equal to the market value of precious metal while the deposit is outstanding (where applicable to an agreement), and the cash cost thereafter, the estimated amounts for the 2011 – 2015 taxation years would be as follows: (i) income inclusion of $1.6 billion; (ii) tax payable of $331 million (Cdn$435 million); (iii) transfer pricing penalties (if applied) of $161 million; and (iv) interest and other penalties of $93 million (Cdn$123 million). On this basis, the estimated amounts for the 2016 – 2017 taxation years would be as follows: (i) income inclusion of $260 million; (ii) tax payable of $68 million (Cdn$89 million); (iii) transfer pricing penalties (if applied) of $26 million; and (iv) interest and other penalties of $4 million (Cdn$6 million). 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. Defendants have filed motions to dismiss the second amended complaint and a hearing is set for November 2018. 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. 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, 2018
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Segmented Information	26. 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, 2018 (in thousands) Sales Cost Depletion Gross Gain on Net Cash Flow Total Silver San Dimas 1 $ 17,673 $ 4,622 $ 1,567 $ 11,484 $ 245,715 $ 257,199 $ 13,051 $ — Peñasquito 25,315 6,452 4,572 14,291 — 14,291 18,863 395,052 Antamina 23,736 4,676 12,369 6,691 — 6,691 19,060 732,979 Constancia 6,826 2,418 2,927 1,481 — 1,481 4,409 254,773 Other 2 25,097 8,939 5,279 10,879 — 10,879 16,014 511,851 Total silver interests $ 98,647 $ 27,107 $ 26,714 $ 44,826 $ 245,715 $ 290,541 $ 71,397 $ 1,894,655 Gold Sudbury 3 $ 5,778 $ 1,760 $ 3,498 $ 520 $ — $ 520 $ 4,020 $ 372,366 Salobo 92,327 28,294 27,316 36,717 — 36,717 64,033 2,760,314 Constancia 2,857 869 812 1,176 — 1,176 1,989 120,025 San Dimas 1 4,733 2,243 2,079 411 — 411 2,490 218,158 Other 4 8,058 2,307 2,075 3,676 — 3,676 5,850 26,950 Total gold interests $ 113,753 $ 35,473 $ 35,780 $ 42,500 $ — $ 42,500 $ 78,382 $ 3,497,813 Cobalt Voisey’s Bay $ — $ — $ — $ — $ — $ — $ — $ 393,327 Total mineral stream interests $ 212,400 $ 62,580 $ 62,494 $ 87,326 $ 245,715 $ 333,041 $ 149,779 $ 5,785,795 Corporate General and administrative $ (11,972 ) $ (7,627 ) Interest expense (5,659 ) (5,459 ) Other (492 ) (1,493 ) Income tax recovery 3,224 — Total corporate $ (14,899 ) $ (14,579 ) $ 430,317 Consolidated $ 318,142 $ 135,200 $ 6,216,112 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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, Aljustrel, and 777 silver interests, the non-operating Keno Hill, Loma de La Plata, Pascua-Lama and Rosemont silver interests as well as the previously owned Lagunas Norte, Pierina and Veladero silver interests which expired on March 31, 2018. 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating Victor gold interest and the Stobie gold interest which was placed into care and maintenance during the second quarter of 2017. 4) 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 Rosemont gold interest. Three Months Ended June 30, 2017 (in thousands) Sales Cost Depletion Net Cash Flow Total Silver San Dimas 1 $ 14,298 $ 3,617 $ 1,238 $ 9,443 $ 10,680 $ 138,173 Peñasquito 28,519 6,769 4,724 17,026 21,750 410,876 Antamina 24,873 5,087 14,257 5,529 15,729 790,072 Constancia 9,659 3,296 4,113 2,250 6,363 269,036 Other 2 31,465 9,942 6,821 14,702 21,216 766,091 Total silver interests $ 108,814 $ 28,711 $ 31,153 $ 48,950 $ 75,738 $ 2,374,248 Gold Sudbury 3 $ 7,264 $ 2,329 $ 4,480 $ 455 $ 4,930 $ 391,757 Salobo 63,577 20,191 19,223 24,163 43,386 2,861,619 Constancia 2,949 942 964 1,043 2,007 123,758 Other 4 17,080 4,808 3,952 8,320 12,192 39,240 Total gold interests $ 90,870 $ 28,270 $ 28,619 $ 33,981 $ 62,515 $ 3,416,374 Total mineral stream interests $ 199,684 $ 56,981 $ 59,772 $ 82,931 $ 138,253 $ 5,790,622 Corporate General and administrative $ (9,069 ) $ (6,869 ) Interest expense (6,482 ) (6,513 ) Other (324 ) (190 ) Income tax recovery 556 — Total corporate $ (15,319 ) $ (13,572 ) $ 205,388 Consolidated $ 67,612 $ 124,681 $ 5,996,010 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating 4) 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 Six Months Ended June 30, 2018 (in thousands) Sales Cost Depletion Gross Gain on Net Cash Flow Total Silver San Dimas 1 $ 40,594 $ 10,549 $ 3,575 $ 26,470 $ 245,715 $ 272,185 $ 30,045 $ — Peñasquito 45,935 11,568 8,198 26,169 — 26,169 34,367 395,052 Antamina 47,506 9,496 24,659 13,351 — 13,351 38,010 732,979 Constancia 16,406 5,807 7,030 3,569 — 3,569 10,599 254,773 Other 2 54,372 18,186 11,284 24,902 — 24,902 36,037 511,851 Total silver interests $ 204,813 $ 55,606 $ 54,746 $ 94,461 $ 245,715 $ 340,176 $ 149,058 $ 1,894,655 Gold Sudbury 3 $ 12,679 $ 3,834 $ 7,622 $ 1,223 $ — $ 1,223 $ 8,968 $ 372,366 Salobo 165,162 50,152 48,418 66,592 — 66,592 115,010 2,760,314 Constancia 7,168 2,168 2,026 2,974 — 2,974 5,001 120,025 San Dimas 1 4,733 2,243 2,079 411 — 411 2,490 218,158 Other 4 17,097 4,991 4,868 7,238 — 7,238 11,001 26,950 Total gold interests $ 206,839 $ 63,388 $ 65,013 $ 78,438 $ — $ 78,438 $ 142,470 $ 3,497,813 Cobalt Voisey’s Bay $ — $ — $ — $ — $ — $ — $ — $ 393,327 Total mineral stream interests $ 411,652 $ 118,994 $ 119,759 $ 172,899 $ 245,715 $ 418,614 $ 291,528 $ 5,785,795 Corporate General and administrative $ (21,729 ) $ (17,497 ) Interest expense (11,249 ) (11,055 ) Other (3,080 ) (2,436 ) Income tax recovery 3,709 — Total corporate $ (32,349 ) $ (30,988 ) $ 430,317 Consolidated $ 386,265 $ 260,540 $ 6,216,112 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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, Aljustrel, and 777 silver interests, the non-operating 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating 4) 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 Six Months Ended June 30, 2017 (in thousands) Sales Cost Depletion Net Cash Flow Total Silver San Dimas 1 $ 28,265 $ 7,022 $ 2,402 $ 18,841 $ 21,243 $ 138,173 Peñasquito 43,214 10,320 7,201 25,693 32,894 410,876 Antamina 44,851 9,134 25,734 9,983 35,717 790,072 Constancia 16,346 5,557 6,935 3,854 10,586 269,036 Other 2 67,302 20,378 14,544 32,380 44,695 766,091 Total silver interests $ 199,978 $ 52,411 $ 56,816 $ 90,751 $ 145,135 $ 2,374,248 Gold Sudbury 3 $ 15,637 $ 5,083 $ 9,778 $ 776 $ 10,523 $ 391,757 Salobo 140,206 45,394 43,216 51,596 94,812 2,861,619 Constancia 5,756 1,869 1,912 1,975 3,874 123,758 Other 4 36,058 10,515 11,993 13,550 21,186 39,240 Total gold interests $ 197,657 $ 62,861 $ 66,899 $ 67,897 $ 130,395 $ 3,416,374 Total mineral stream interests $ 397,635 $ 115,272 $ 123,715 $ 158,648 $ 275,530 $ 5,790,622 Corporate General and administrative $ (16,967 ) $ (17,344 ) Interest expense (12,854 ) (12,902 ) Other (419 ) (680 ) Income tax recovery 428 — Total corporate $ (29,812 ) $ (30,926 ) $ 205,388 Consolidated $ 128,836 $ 244,604 $ 5,996,010 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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 Keno Hill, Aljustrel, Loma de La Plata, Pascua-Lama and Rosemont silver interests, the previously owned Lagunas Norte, Pierina and Veladero silver interests which expired on March 31, 2018 and the previously owned Cozamin silver interest which expired on April 4, 2017. 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating Victor gold interest and the Stobie gold interest which was placed into care and maintenance during the second quarter of 2017. 4) 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 Rosemont gold interest. 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 (in thousands) Three Months Six Months Silver Gold Cobalt Total North America Canada $ 15,448 7 % $ 33,917 8% $ 35,546 $ 399,317 $ 393,327 $ 828,190 14 % United States — 0 % — 0% 433 — — 433 0 % Mexico 48,285 23 % 92,693 23% 396,458 218,158 — 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% 1,128,935 120,024 — 1,248,959 22 % Consolidated $ 212,400 100 % $ 411,652 100% $ 1,894,655 $ 3,497,813 $ 393,327 $ 5,785,795 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile. Sales Carrying Amount at (in thousands) Three Months Six Months Silver Gold Cobalt Total North America Canada $ 27,106 14 % $ 57,519 15% $ 38,775 $ 430,997 $ — $ 469,772 8 % United States — 0 % — 0% 433 — — 433 0 % Mexico 45,195 23 % 78,828 20% 550,809 — — 550,809 10 % Europe Greece 2,021 1 % 5,445 1% 11,347 — — 11,347 0 % Portugal 1,918 1 % 4,659 1% 24,135 — — 24,135 0 % Sweden 6,750 3 % 12,340 3% 41,064 — — 41,064 1 % South America Argentina/Chile 1 2,496 1 % 5,171 1% 497,612 — — 497,612 9 % Brazil 63,577 32 % 140,206 35% — 2,861,619 — 2,861,619 49 % Peru 50,621 25 % 93,467 24% 1,210,073 123,758 — 1,333,831 23 % Consolidated $ 199,684 100 % $ 397,635 100% $ 2,374,248 $ 3,416,374 $ — $ 5,790,622 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2018
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Subsequent Events	27. Subsequent Events Declaration of Dividend On August 14, 2018, the Board of Directors declared a dividend in the amount of $0.09 per common share as per the Company’s stated dividend policy whereby the quarterly dividend will be equal to 30% of the average of the operating cash flow of the previous four quarters. This dividend is payable to shareholders of record on August 29, 2018 and is expected to be distributed on or about September 13, 2018. 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. Acquisition of Stillwater Mineral Stream Interest On July 16, 2018, the Company announced that it had entered into an agreement with Sibanye to acquire an amount of gold and palladium equal to a fixed percentage of production from the Stillwater and East Boulder mines located in Montana in the United States (collectively referred to as the “Stillwater” mines) for a total upfront cash payment of $500 million. Deliveries under the agreement will begin July 1, 2018 at a fixed payable rate of 99% for gold and 99.6% for palladium. Under the terms of the agreement, the Company has acquired an amount of gold equal to 100% of the gold production for the life of the mine and an amount of palladium equal to 4.5% of the palladium production until 375,000 ounces of palladium have been delivered to Wheaton, after which the Company’s entitlement will be reduced to 2.25% of the palladium production until 550,000 ounces of palladium have been delivered to Wheaton, after which the Company’s entitlement will be reduced to 1.00% of the palladium production for the life of mine. In addition to the initial upfront cash consideration, the Company will make ongoing payments of 18% of the spot price of gold and palladium for each ounce of gold and palladium delivered under the agreement until the net market value of gold and palladium delivered to Wheaton exceeds the initial upfront cash deposit, and 22% of the spot price thereafter 1 Acquisition of Adventus Zinc Corporation Shares On July 17, 2018, the Company acquired 7,093,392 common shares of Adventus Zinc Corporation (“Adventus”) in a private placement transaction, for total consideration of Cdn$6 million, representing 9.99% of Adventus’ issued and outstanding common shares. Concurrently, the Company paid an additional Cdn$1 million to acquire a right of first refusal on any new streaming or royalty transactions on precious metals on the Adventus existing properties in Ecuador and a right of first offer on any subsequently acquired properties in Ecuador.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2018
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Basis of Presentation	2. Basis of Presentation 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, 2017 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, 2017. 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, 2018 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.
IFRS 9 - Financial Instruments (amended 2014)	IFRS 9 – Financial Instruments (amended 2014): On January 1, 2018, the Company adopted IFRS 9 (2014) – Financial Instruments (amended 2014) (“IFRS 9 (2014)”). The Company had previously adopted IFRS 9 (2009) – Financial Instruments effective January 1, 2010. The adoption of IFRS 9 (2014) did not materially impact the accounting policies and methods of application relative to the Company’s financial instruments.
IFRS 15 - Revenue from Contracts with Customers	IFRS 15 – Revenue from Contracts with Customers: On January 1, 2018, the Company adopted IFRS 15 – Revenue from Contracts with Customers (“IFRS 15”) which supersedes IAS 18 – Revenue (“IAS 18”). IFRS 15 establishes a single five-step model framework for determining the nature, amount, timing and uncertainty of revenue and cash flows arising from a contract with a customer. The standard is effective for annual periods beginning on or after January 1, 2018. IFRS 15 requires entities to recognize revenue when ‘control’ of goods or services transfers to the customer whereas the previous standard, IAS 18, required entities to recognize revenue when the ‘risks and rewards’ of the goods or services transfer to the customer. The Company concluded that there is no change in the timing of revenue recognition of its silver and gold credit sales and its silver and gold concentrate sales under IFRS 15 compared to the previous standard as the point of transfer of risks and rewards of the silver and gold and the transfer of control of the silver and gold occur at the same time. As such, no adjustment was required to the Company’s consolidated financial statements as at January 1, 2017 or for the year ended December 31, 2017. Additionally, IFRS 15 requires that variable consideration should only be recognized to the extent that it is highly probable that a significant reversal in the amount of cumulative revenue recognized will not occur. The Company concluded that the adjustments relating to the final assay results for the quantity of concentrate sold under the terms of the concentrate sales contracts are not significant and do not constrain the recognition of revenue.
Future Changes in Accounting Policies	3.2. Future Changes in Accounting Policies The IASB has issued the following new or amended standards: Standards required to be applied for periods beginning on or after January 1, 2019: • IFRS 16 – Leases: In January 2016, the IASB and the FASB completed its joint project to address concerns by users of financial statements in respect of reduced comparability between financial statements due to the different accounting treatment applied to operating leases as compared to finance leases by removing the distinction between operating leases and finance leases and rather having all leases accounted for as a finance lease, subject to limited exceptions for short-term leases and leases of low value assets. The Company is currently evaluating the impact of this standard and anticipates that upon adoption of this standard, its leases will be capitalized under the classification Right-of-Use • IFRIC 23 – Uncertainty over Income Tax Treatments: In June 2017, the IASB issued IFRIC 23 which is effective for periods beginning on or after January 1, 2019. 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 extent of the impact of the adoption of IFRIC 23 has not yet been determined. Early adoption of the above standards is permitted.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
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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, 2018 (in thousands) Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 92,661 $ 92,661 $ — $ — Trade receivables from provisional concentrate sales, net of fair value adjustment 783 — 783 — Long-term investments - common shares held 261,159 261,159 — — Long-term investments - warrants held 13 — 13 — Convertible note receivable 13,723 — — 13,723 $ 368,339 $ 353,820 $ 796 $ 13,723 December 31, 2017 (in thousands) Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 98,521 $ 98,521 $ — $ — Trade receivables from provisional concentrate sales, net of fair value adjustment 1,398 — 1,398 — Long-term investments - common shares held 95,608 95,608 — — Long-term investments - warrants held 124 — 124 — Convertible note receivable 15,777 — — 15,777 $ 211,428 $ 194,129 $ 1,522 $ 15,777

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2018
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Summary of Revenue	Three Months Ended Six Months Ended (in thousands) 2018 2017 2018 2017 Sales Silver Silver credit sales $ 87,620 41 % $ 95,799 48 % $ 182,109 44 % $ 170,228 43 % Concentrate sales 11,027 5 % 13,015 6 % 22,704 6 % 29,750 7 % $ 98,647 46 % $ 108,814 54 % $ 204,813 50 % $ 199,978 50 % Gold Gold credit sales $ 110,688 52 % $ 81,696 41 % $ 201,545 49 % $ 177,195 45 % Concentrate sales 3,065 2 % 9,174 5 % 5,294 1 % 20,462 5 % $ 113,753 54 % $ 90,870 46 % $ 206,839 50 % $ 197,657 50 % Total sales revenue $ 212,400 100 % $ 199,684 100 % $ 411,652 100 % $ 397,635 100 %

General and Administrative (Tab

General and Administrative (Tables)	6 Months Ended
	Jun. 30, 2018
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Summary of General and Administrative Expense	Three Months Ended Six Months Ended (in thousands) Note 2018 2017 2018 2017 Salaries and benefits Salaries and benefits, excluding PSUs $ 3,458 $ 3,120 $ 7,049 $ 6,345 PSUs 1 21.1 3,316 (23 ) 3,499 (457 ) Total salaries and benefits $ 6,774 $ 3,097 $ 10,548 $ 5,888 Depreciation 233 245 473 487 Donations 439 449 1,138 831 Professional fees 515 1,212 1,876 1,873 Other 2,617 2,793 5,051 5,419 Cash settled general and administrative $ 10,578 $ 7,796 $ 19,086 $ 14,498 Equity settled stock based compensation 2 Stock options 20.2 $ 584 $ 680 $ 1,235 $ 1,662 RSUs 20.3 810 593 1,408 807 Total equity settled stock based compensation $ 1,394 $ 1,273 $ 2,643 $ 2,469 Total general and administrative $ 11,972 $ 9,069 $ 21,729 $ 16,967 1) The PSU accrual related to the anticipated fair value of the PSUs issued uses a weighted average performance factor of 83% during the three and six months ended June 30, 2018 as compared to 14% during the comparable periods of 2017. 2) Equity settled stock based compensation is a non-cash

Other Income (Tables)

Other Income (Tables)	6 Months Ended
	Jun. 30, 2018
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Summary of Other Income	Three Months Ended Six Months Ended (in thousands) 2018 2017 2018 2017 Dividend income $ 19 $ 15 $ 39 $ 30 Interest income 661 72 1,227 133 Proceeds relative to the Mercator Minerals bankruptcy — — — 1,022 Guarantee fees - Primero Revolving Credit Facility 858 — 858 — Fees for contract amendments and reconciliations — 988 248 988 Total other income $ 1,538 $ 1,075 $ 2,372 $ 2,173

Other Expense (Tables)

Other Expense (Tables)	6 Months Ended
	Jun. 30, 2018
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Summary of Othe Expense	Three Months Ended Six Months Ended (in thousands) Note 2018 2017 2018 2017 Stand-by 18.1 $ 974 $ 715 $ 1,891 $ 1,356 Agency fees 18.1 — — 50 50 Amortization of credit facility origination fees - undrawn facilities 18.1 245 179 476 340 Letter of guarantee 18.2 490 457 807 754 Share of losses of associate 15 — — 201 — Other — 7 5 7 Total other expense $ 1,709 $ 1,358 $ 3,430 $ 2,507

Unrealized Fair Value Losses 41

Unrealized Fair Value Losses (Gains), Net (Tables)	6 Months Ended
	Jun. 30, 2018
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Summary of Unrealized Fair Value Losses (Gains), Net	Three Months Ended Six Months Ended (in thousands) Note 2018 2017 2018 2017 Loss on fair value adjustment of convertible note receivable 16 $ 283 $ — $ 2,054 $ — Loss on fair value adjustment of share purchase warrants held 17 12 — 111 — Total unrealized fair value losses (gains), net $ 295 $ — $ 2,165 $ —

Accounts Receivable (Tables)

Accounts Receivable (Tables)	6 Months Ended
	Jun. 30, 2018
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Summary of Accounts Receivable	(in thousands) Note June 30 December 31 Trade receivables from provisional concentrate sales, net of fair value adjustment 6 $ 783 $ 1,398 Other accounts receivables 6,092 1,796 Total accounts receivable $ 6,875 $ 3,194

Mineral Stream Interests (Table

Mineral Stream Interests (Tables)	6 Months Ended
	Jun. 30, 2018
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Schedule of Mineral Stream Interests	Six Months Ended June 30, 2018 Cost Accumulated Depletion & Impairment 1 Carrying (in thousands) Balance Additions Disposal Balance Balance Depletion Disposal Balance Silver interests San Dimas $ 190,331 $ — $ (190,331 ) $ — $ (55,469 ) $ (3,575 ) $ 59,044 $ — $ — Peñasquito 524,626 — — 524,626 (121,376 ) (8,198 ) — (129,574 ) 395,052 Antamina 900,343 — — 900,343 (142,705 ) (24,659 ) — (167,364 ) 732,979 Constancia 302,948 — — 302,948 (41,145 ) (7,030 ) — (48,175 ) 254,773 Other 2 1,282,837 — — 1,282,837 (759,702 ) (11,284 ) — (770,986 ) 511,851 $ 3,201,085 $ — $ (190,331 ) $ 3,010,754 $ (1,120,397 ) $ (54,746 ) $ 59,044 $ (1,116,099 ) $ 1,894,655 Gold interests Sudbury 3 $ 623,864 $ — — $ 623,864 $ (243,876 ) $ (7,622 ) — $ (251,498 ) $ 372,366 Salobo 3,059,876 — — 3,059,876 (251,144 ) (48,418 ) — (299,562 ) 2,760,314 Constancia 136,058 — — 136,058 (14,007 ) (2,026 ) — (16,033 ) 120,025 San Dimas — 220,237 — 220,237 — (2,079 ) — (2,079 ) 218,158 Other 4 402,232 — — 402,232 (370,414 ) (4,868 ) — (375,282 ) 26,950 $ 4,222,030 $ 220,237 $ — $ 4,442,267 $ (879,441 ) $ (65,013 ) $ — $ (944,454 ) $ 3,497,813 Cobalt interests Voisey’s Bay $ — $ 393,327 — $ 393,327 $ — $ — — $ — $ 393,327 $ 7,423,115 $ 613,564 $ (190,331 ) $ 7,846,348 $ (1,999,838 ) $ (119,759 ) $ 59,044 $ (2,060,553 ) $ 5,785,795 1) Includes cumulative impairment charges to June 30, 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 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. 3) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 4) Comprised of the Minto, Rosemont and 777 gold interests. Year Ended December 31, 2017 Cost Accumulated Depletion & Impairment 1 Carrying (in thousands) Balance Reductions² Disposal 3 Balance Balance Depletion Disposal 3 Impairment Balance Silver interests San Dimas $ 190,331 $ — $ — $ 190,331 $ (49,756 ) $ (5,713 ) $ — $ — $ (55,469 ) $ 134,862 Peñasquito 524,626 — — 524,626 (106,549 ) (14,827 ) — — (121,376 ) 403,250 Antamina 900,343 — — 900,343 (84,537 ) (58,168 ) — — (142,705 ) 757,638 Constancia 302,948 — — 302,948 (26,977 ) (14,168 ) — — (41,145 ) 261,803 Other 3 1,329,731 (4,935 ) (41,959 ) 1,282,837 (544,161 ) (28,820 ) 41,959 (228,680 ) (759,702 ) 523,135 $ 3,247,979 $ (4,935 ) $ (41,959 ) $ 3,201,085 $ (811,980 ) $ (121,696 ) $ 41,959 $ (228,680 ) $ (1,120,397 ) $ 2,080,688 Gold interests Sudbury 4 $ 623,864 $ — $ — $ 623,864 $ (222,329 ) $ (21,547 ) $ — $ — $ (243,876 ) $ 379,988 Salobo 3,059,876 — — 3,059,876 (155,041 ) (96,103 ) — — (251,144 ) 2,808,732 Constancia 136,058 — — 136,058 (10,388 ) (3,619 ) — — (14,007 ) 122,051 Other 5 402,232 — — 402,232 (350,999 ) (19,415 ) — — (370,414 ) 31,818 $ 4,222,030 $ — $ — $ 4,222,030 $ (738,757 ) $ (140,684 ) $ — $ — $ (879,441 ) $ 3,342,589 $ 7,470,009 $ (4,935 ) $ (41,959 ) $ 7,423,115 $ (1,550,737 ) $ (262,380 ) $ 41,959 $ (228,680 ) $ (1,999,838 ) $ 5,423,277 1) Includes cumulative impairment charges to December 31, 2017 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) On March 29, 2017, the Company amended its silver purchase agreement with Alexco Resource Corp. (“Alexco”) to adjust the silver production payment so that it will be a percentage of the spot silver price that increases with lower mill silver head grades and lower silver prices, and decreases with higher mill silver head grades and higher silver prices, subject to certain ceiling and floor grades and prices. In addition, the outside completion date was extended to December 31, 2019 and the area of interest was expanded to include properties currently owned by Alexco and properties acquired by Alexco in the future which fall within a one kilometer radius of existing Alexco holdings in the Keno Hill Silver District. As consideration, on April 10, 2017, Alexco issued 3 million shares to Wheaton which had a fair value of $5 million. The fair value of these shares have been reflected as a reduction to the cost base of the Keno Hill silver interest. 3) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Cozamin, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Lagunas Norte, Pierina, Veladero, Rosemont and 777 silver interests. The Cozamin precious metal purchase agreement expired on April 4, 2017 and the fully depleted value of this contract has been reflected as a disposal. 4) Comprised of the Coleman, Copper Cliff, Garson, Stobie, Creighton, Totten and Victor gold interests. 5) Comprised of the Minto, Rosemont and 777 gold interests.
Classification of Mining Interest Between Depletable and Non-depletable	June 30, 2018 December 31, 2017 (in thousands) Depletable Non-Depletable Total Depletable Non-Depletable Total Silver interests San Dimas $ — $ — $ — $ 38,110 $ 96,752 $ 134,862 Peñasquito 290,524 104,528 395,052 293,968 109,282 403,250 Antamina 376,581 356,398 732,979 380,738 376,900 757,638 Constancia 239,525 15,248 254,773 240,950 20,853 261,803 Other 1 96,787 415,064 511,851 90,366 432,769 523,135 $ 1,003,417 $ 891,238 $ 1,894,655 $ 1,044,132 $ 1,036,556 $ 2,080,688 Gold interests Sudbury 2 $ 313,944 $ 58,422 $ 372,366 $ 315,421 $ 64,567 $ 379,988 Salobo 2,225,545 534,769 2,760,314 2,224,133 584,599 2,808,732 Constancia 110,881 9,144 120,025 112,432 9,619 122,051 San Dimas 111,148 107,010 218,158 — — — Other 3 26,950 — 26,950 31,818 — 31,818 $ 2,788,468 $ 709,345 $ 3,497,813 $ 2,683,804 $ 658,785 $ 3,342,589 Cobalt interests Voisey’s Bay $ — $ 393,327 $ 393,327 $ — $ — $ — $ 3,791,885 $ 1,993,910 $ 5,785,795 $ 3,727,936 $ 1,695,341 $ 5,423,277 1) Comprised of the Los Filos, Zinkgruvan, Yauliyacu, Stratoni, Keno Hill, Cozamin, Neves-Corvo, Minto, Aljustrel, Loma de La Plata, Pascua-Lama, Lagunas Norte, Pierina, Veladero, Rosemont and 777 silver interests. The Cozamin precious metal purchase agreement expired on April 4, 2017 while the Lagunas Norte, Pierina and Veladero silver interests expired on March 31, 2018. 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.
Summary of Current Issued and Outstanding Shares Subject to Resale Restrictions	(in thousands) Cash received $ 220,000 Fair value of First Majestic shares received 151,000 Fee from Goldcorp in exchange for release from the 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

Early Deposit Mineral Stream 44

Early Deposit Mineral Stream Interests (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Summary of Early Deposit Mineral Stream Interests	The following table summarizes the early deposit mineral stream interests currently owned by the Company: Mine Attributable Early Deposit Mineral Stream Interests Location of Upfront 1 Upfront 1, 2 Total Silver Gold Term of Toroparu Sandspring Guyana $ 15,500 $ 138,000 $ 153,500 50 % 10 % Life of Mine Cotabambas Panoro Peru 6,250 133,750 140,000 100 % ³ 25 % ³ Life of Mine Kutcho Kutcho Canada 3,500 61,500 65,000 100 % 4 100 % 4 Life of Mine $ 25,250 $ 333,250 $ 358,500 1) Expressed in United States dollars, rounded to the nearest thousand; excludes closing costs. 2) Please refer to Note 25 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 66.67% of silver production and 16.67% of gold 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 silver and gold production for the life of mine. 1 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.

Investment in Associate (Tables

Investment in Associate (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Disclosure of Investment in Associate	A summary of the carrying value of the Kutcho Investment in Associate and the losses recognized as a component of the Company’s net earnings during 2018 is presented below: Share of Associate Losses (in thousands) Carrying Three Months Six Months Carrying Investment in Associate - Kutcho $ 2,793 $ — $ (201 ) $ 2,994

Convertible Note Receivable (Ta

Convertible Note Receivable (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Schedule of the Company's Convertible Note Receivable	A summary of the fair value of the Kutcho Convertible Note and the fair value changes recognized as a component of the Company’s net earnings during the three and six months ended June 30, 2018 is presented below: Fair Value Adjustment Loss (in thousands) Fair Value at Three Months Six Months Fair Value at Convertible Note Receivable - Kutcho $ 13,723 $ (283 ) $ (2,054 ) $ 15,777

Long-Term Equity Investments (T

Long-Term Equity Investments (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Summary of Long-Term Equity Investments	(in thousands) June 30 December 31 Common shares held $ 261,159 $ 95,608 Warrants held 13 124 $ 261,172 $ 95,732 Common Shares Held Fair Value Adjustment Gains (in thousands) Fair Value at Three Months Six Months Fair Value at Bear Creek $ 17,829 $ (5,831 ) $ (3,528 ) $ 21,358 Sabina 13,505 (831 ) (7,665 ) 21,171 Arizona Mining 46,780 15,370 19,199 27,581 First Majestic 159,578 8,578 8,578 — Other 23,467 (623 ) (3,050 ) 25,498 Total common shares held $ 261,159 $ 16,663 $ 13,534 $ 95,608 Fair Value Adjustment Gains (in thousands) Fair Value at Three Months Six Months Bear Creek $ 21,465 $ (1,236 ) $ (1,752 ) Sabina 18,032 4,506 9,492 Arizona Mining 21,962 5,823 3,714 Other 19,136 (1,618 ) (416 ) Total common shares held $ 80,595 $ 7,475 $ 11,038 Warrants Held Fair Value Adjustment Gain (Loss) (in thousands) Fair Value at Three Months Six Months Fair Value at Warrants held - Kutcho $ 13 $ (12 ) $ (111 ) $ 124

Credit Facilities (Tables)

Credit Facilities (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Details of Bank Debt	(in thousands) June 30 December 31 Current portion $ — $ — Long-term portion 956,500 770,000 Gross bank debt outstanding 1 $ 956,500 $ 770,000 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. Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Interest Expense During Period Average principle outstanding during period $ 657,144 $ 1,024,166 $ 687,516 $ 1,065,683 Average effective interest rate during period 3.44 % 2.53 % 3.27 % 2.41 % Total interest expense incurred during period $ 5,659 $ 6,482 $ 11,249 $ 12,854

Issued Capital (Tables)

Issued Capital (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Summary of Capital Issued	(US dollars in thousands) Note June 30 2018 December 31 Issued capital Share capital issued and outstanding: 443,559,922 common shares 19.1 $ 3,489,643 $ 3,472,029
Summary of Common Shares Issued and Outstanding	A continuity schedule of the Company’s issued and outstanding common shares from January 1, 2017 to June 30, 2018 is presented below: Number Weighted At January 1, 2017 441,456,217 Share purchase options exercised 1 40,050 Cdn$ 25.65 Restricted share units released 1 20,750 $ 0.00 At March 31, 2017 441,517,017 Share purchase options exercised 1 13,000 Cdn$ 23.61 Dividend reinvestment plan 2 475,387 US$ 20.46 At June 30, 2017 442,005,404 Restricted share units released 1 1,225 US$ 0.00 Share purchase options exercised 1 17,550 Cdn$ 23.87 Dividend reinvestment plan 2 700,130 US$ 20.27 At December 31, 2017 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 $ 0.00 Dividend reinvestment plan 2 718,453 US$ 21.09 At June 30, 2018 443,559,922 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	19.2. Dividends Declared Three Months Ended June 30 Six Months Ended June 30 2018 2017 2018 2017 Dividends declared per share $ 0.09 $ 0.07 $ 0.18 $ 0.14 Average number of shares eligible for dividend 443,197 441,798 442,996 441,658 Total dividends paid $ 39,888 $ 30,926 $ 79,739 $ 61,832 Paid as follows: Cash $ 32,475 $ 26,818 $ 64,579 $ 52,101 DRIP 2 7,413 4,108 15,160 9,731 Total dividends paid $ 39,888 $ 30,926 $ 79,739 $ 61,832 Shares issued under the DRIP 347,461 207,405 718,453 475,387 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, 2018, cumulative dividends of $838 million have been declared and paid by the Company.

Reserves (Tables)

Reserves (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Summary of Reserves	(in thousands) Note June 30 2018 December 31 Reserves Share purchase warrants 20.1 $ 83,077 $ 83,077 Share purchase options 20.2 29,836 28,799 Restricted share units 20.3 5,109 5,177 Long-term investment revaluation reserve, net of tax 20.4 (30,203 ) (40,047 ) Total reserves $ 87,819 $ 77,006
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 2018 2017 2018 2017 Black-Scholes weighted average assumptions Grant date share price and exercise price Cdn$ 27.96 Cdn$ 27.60 Cdn$ 26.25 Cdn$ 27.51 Expected dividend yield 1.65 % 1.21 % 1.73 % 1.14 % Expected volatility 35 % 35 % 35 % 36 % Risk-free interest rate 2.37 % 0.73 % 1.91 % 0.92 % Expected option life, in years 2.5 2.5 2.5 2.5 Weighted average fair value per option granted Cdn$ 6.00 Cdn$ 5.68 Cdn$ 5.49 Cdn$ 5.87 Number of options issued during the period 3,880 1,820 549,210 486,920 Total fair value of options issued (000’s) $ 18 $ 8 $ 2,347 $ 2,143
Disclosure of Share Purchase Options Reserve	A continuity schedule of the Company’s share purchase options reserve from January 1, 2017 to June 30, 2018 is presented below: (in thousands) Share At January 1, 2017 $ 26,063 Recognition of fair value of share purchase options issued 982 Share purchase options exercised (192 ) At March 31, 2017 $ 26,853 Recognition of fair value of share purchase options issued 680 Share purchase options exercised (44 ) At June 30, 2017 $ 27,489 Recognition of fair value of share purchase options issued 1,375 Share purchase options exercised (65 ) At December 31, 2017 $ 28,799 Recognition of fair value of share purchase options issued 651 At March 31, 2018 $ 29,450 Recognition of fair value of share purchase options issued 584 Share purchase options exercised (198 ) At June 30, 2018 $ 29,836
Disclosure of Outstanding Share Purchase Options	A continuity schedule of the Company’s outstanding share purchase options from January 1, 2017 to June 30, 2018 is presented below: Number of Weighted At January 1, 2017 4,097,400 Cdn$ 27.36 Granted (fair value - $2 million or Cdn$5.87 per option) 485,100 27.51 Exercised (40,050 ) 25.65 Expired (35,000 ) 32.40 At March 31, 2017 4,507,450 Cdn$ 27.32 Granted (fair value - Cdn$5.68 per option) 1,820 27.60 Exercised (13,000 ) 23.61 Expired (241,400 ) 34.81 At June 30, 2017 4,254,870 Cdn$ 26.89 Granted (fair value - Cdn$5.53 per option) 21,440 24.11 Exercised (17,550 ) 23.87 Expired (20,000 ) 36.90 Forfeited (6,500 ) 27.51 At December 31, 2017 4,232,260 Cdn$ 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$5.83 per option) 3,880 27.96 Exercised (46,800 ) 24.28 Expired (15,000 ) 30.19 Forfeited (2,820 ) 26.98 At June 30, 2018 3,887,850 Cdn$ 25.58
Disclosure of Restricted Share Units Reserve	A continuity schedule of the Company’s restricted share units reserve from January 1, 2017 to June 30, 2018 is presented below: (in thousands) Restricted At January 1, 2017 $ 3,669 Recognition of fair value of RSUs issued 214 Restricted share units released (483 ) At March 31, 2017 $ 3,400 Recognition of fair value of RSUs issued 593 At June 30, 2017 $ 3,993 Recognition of fair value of RSUs issued 1,207 Restricted share units released (22 ) At December 31, 2017 $ 5,178 Recognition of fair value of RSUs issued 598 Restricted share units released (1,473 ) At March 31, 2018 $ 4,303 Recognition of fair value of RSUs issued 810 Restricted share units released (4 ) At June 30, 2018 $ 5,109
Disclosure of Long Term Investment Revaluation Reserve	A continuity schedule of the Company’s long-term investment revaluation reserve from January 1, 2017 to June 30, 2018 is presented below: (in thousands) Change in Deferred Tax Total At January 1, 2017 $ (56,662 ) $ (846 ) $ (57,508 ) Unrealized gain (loss) on LTIs 1 3,563 265 3,828 At March 31, 2017 $ (53,099 ) $ (581 ) $ (53,680 ) Unrealized gain (loss) on LTIs 1 7,475 (722 ) 6,753 At June 30, 2017 $ (45,624 ) $ (1,303 ) $ (46,927 ) Unrealized gain (loss) on LTIs 1 7,513 (633 ) 6,880 At December 31, 2017 $ (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 ) 1) LTIs refers to long-term investments in common shares held.

Stock Based Compensation (Table

Stock Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [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) from January 1, 2017 to June 30, 2018 is presented below: Number of At January 1, 2017 717,564 Granted 196,160 Paid 1 (271,810 ) At March 31, 2017 641,914 Granted 730 Dividend equivalent participation 4,004 At June 30, 2017 646,648 Granted 10,330 Dividend equivalent participation 6,300 Paid 1 (3,629 ) Forfeited (3,050 ) At December 31, 2017 656,599 Granted 218,670 Paid 1 (221,663 ) At March 31, 2018 653,606 Granted 1,590 Forfeited (2,517 ) At June 30, 2018 652,679 1) The PSUs paid out during the period had a performance factor of 0% resulting in a cash disbursement of $Nil.

Earnings per Share ("EPS") an52

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") (Tables)	6 Months Ended
	Jun. 30, 2018
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) 2018 2017 2018 2017 Basic weighted average number of shares outstanding 443,191 441,784 442,961 441,635 Effect of dilutive securities Share purchase options 175 275 131 277 Restricted share units 404 311 361 256 Diluted weighted average number of shares outstanding 443,770 442,370 443,453 442,168
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$26.46 (six months - Cdn$26.01), compared to Cdn$27.46 (six months - Cdn$27.48) for the comparable period in 2017. Three Months June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Share purchase options 827 1,392 1,983 1,392 Share purchase warrants 10,000 10,000 10,000 10,000 Total 10,827 11,392 11,983 11,392

Supplemental Cash Flow Inform53

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Summary of Cash Flow Information	Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Change in non-cash Accounts receivable $ (4,682 ) $ (510 ) $ (3,831 ) $ (1,459 ) Accounts payable and accrued liabilities 4,975 (2,119 ) 817 (6,701 ) Other (2,084 ) (837 ) (1,880 ) (769 ) Total change in non-cash $ (1,791 ) $ (3,466 ) $ (4,894 ) $ (8,929 )

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Schedule of Income Tax Recognized in Net Earnings	Income tax recognized in net earnings is comprised of the following: Three Months Ended June 30 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Current income tax expense related to foreign jurisdictions $ 29 $ 264 $ 51 $ 277 Deferred income tax expense (recovery) related to: Origination and reversal of temporary differences $ 845 $ 810 $ 1,891 $ 1,577 Reversal of a write down of previously recognized temporary differences (4,098 ) (1,630 ) (5,651 ) (2,282 ) Total deferred income tax expense (recovery) $ (3,253 ) $ (820 ) $ (3,760 ) $ (705 ) Income tax expense (recovery) recognized in net earnings $ (3,224 ) $ (556 ) $ (3,709 ) $ (428 )
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 Six Months Ended June 30 (in thousands) 2018 2017 2018 2017 Deferred income tax expense (recovery) related to LTIs - common shares held $ 3,233 $ 722 $ 3,691 $ 457 Deferred income tax expense (recovery) recognized in OCI $ 3,233 $ 722 $ 3,691 $ 457
Schedule of Income Tax Recognized Directly in Equity	Income tax recognized directly in equity is comprised of the following: Three Months Ended June 30 Six Months June 30 (in thousands) 2018 2017 2018 2017 Deferred income tax expense (recovery) related to: Write down of previously recognized temporary differences $ 30 $ (113 ) $ 89 $ 39 Deferred income tax expense (recovery) recognized in equity $ 30 $ (113 ) $ 89 $ 39
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 Six Months Ended (in thousands) 2018 2017 2018 2017 Earnings before income taxes $ 314,918 $ 67,056 $ 382,556 $ 128,408 Canadian federal and provincial income tax rates 1 27.00 % 26.00 % 27.00 % 26.00 % Income tax expense based on above rates $ 85,028 $ 17,434 $ 103,290 $ 33,386 Non-deductible 1,128 627 1,915 1,118 Differences in tax rates in foreign jurisdictions (86,764 ) (17,907 ) (106,925 ) (34,979 ) Current period unrecognized temporary differences 1,482 920 3,662 2,329 Write down (reversal of write down) of previously recognized temporary differences (4,098 ) (1,630 ) (5,651 ) (2,282 ) Income tax expense (recovery) $ (3,224 ) $ (556 ) $ (3,709 ) $ (428 ) 1) Effective January 1, 2018, the BC corporate tax rate increased from 11% to 12%, resulting in the Company’s statutory tax rate increasing to 27% for years 2018 and beyond.
Deferred Income Tax Assets and Liabilities Recognized	The movement in deferred income tax assets and liabilities for the six months ended June 30, 2018 and the year ended December 31, 2017 is shown below: Six Months Ended June 30, 2018 Recognized deferred income tax assets and liabilities Opening Recovery Recovery Recovery Closing Deferred tax assets Non-capital $ 3,848 $ 64 $ — $ 9 $ 3,921 Capital losses 1,965 3,662 — — 5,627 Other 147 132 — — 279 Deferred tax liabilities Interest capitalized for accounting (87 ) — — — (87 ) Financing fees (375 ) (107 ) — (98 ) (580 ) Convertible note receivable (29 ) 29 — — — Long-term investments (1,937 ) — (3,691 ) — (5,628 ) Mineral stream interests (3,532 ) — — — (3,532 ) Other (76 ) (20 ) — — (96 ) Total $ (76 ) $ 3,760 $ (3,691 ) $ (89 ) $ (96 ) Year Ended December 31, 2017 Recognized deferred income tax assets and liabilities Opening Recovery Recovery Recovery Closing Deferred tax assets Non-capital $ 3,508 $ 299 $ — $ 41 $ 3,848 Capital losses 846 1,119 — — 1,965 Other 43 104 — — 147 Deferred tax liabilities Interest capitalized for accounting (84 ) (3 ) — — (87 ) Financing fees 173 (572 ) — 24 (375 ) Convertible note receivable — (29 ) — — (29 ) Long-term investments (846 ) — (1,091 ) — (1,937 ) Mineral stream interests (3,640 ) 108 — — (3,532 ) Other (262 ) 186 — — (76 ) Total $ (262 ) $ 1,212 $ (1,091 ) $ 65 $ (76 )
Schedule of Deferred Income Tax Assets Unrecognized	Deferred income tax assets in Canada not recognized are shown below: June 30 December 31 Non-capital $ 36,309 $ 32,388 Financing fees 6,058 7,451 Mineral stream interests 68,834 70,514 Other 2,017 1,366 Capital losses 6,694 10,356 Convertible note receivable 248 — Unrealized losses on long-term investments 9,707 7,828 Total $ 129,867 $ 129,903

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [abstract]
Summary of Commitments to Purchase Mineral Stream	The following table summarizes the Company’s commitments to make per-ounce Attributable Payable Per Unit of Measurement Cash Payment 1, 2 Term of Date of Mineral Stream Interests Silver Gold Palladium Cobalt Silver Gold Palladium Cobalt San Dimas 0 % ³ 50 % ³ 0 % 0 % n/a $ 600 $ n/a $ n/a Life of Mine 10-May-18 Peñasquito 25 % 0 % 0 % 0 % $ 4.17 n/a n/a n/a Life of Mine 24-Jul-07 Salobo 0 % 75 % 0 % 0 % n/a $ 400 n/a n/a Life of Mine 28-Feb-13 Sudbury 0 % 70 % 0 % 0 % n/a $ 400 n/a n/a 20 years 28-Feb-13 Antamina 33.75 % 0 % 0 % 0 % variable 4 n/a n/a n/a Life of Mine 3-Nov-15 Constancia 100 % 50 % 5 0 % 0 % $ 5.90 6 $ 400 6 n/a n/a Life of Mine 8-Aug-12 Stillwater 0 % 100 % 4.5 % 7 0 % n/a variable 8 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 100 % 0 % 0 % 0 % $ 4.34 n/a n/a n/a 25 years 15-Oct-04 Zinkgruvan 100 % 0 % 0 % 0 % $ 4.34 n/a n/a n/a Life of Mine 8-Dec-04 Yauliyacu 100 % ¹¹ 0 % 0 % 0 % $ 8.85 ¹² n/a n/a n/a Life of Mine 23-Mar-06 Stratoni 100 % 0 % 0 % 0 % $ 6.77 ¹³ n/a n/a n/a Life of Mine 23-Apr-07 Minto 100 % 100 % 14 0 % 0 % $ 4.18 $ 322 15 n/a n/a Life of Mine 20-Nov-08 Neves-Corvo 100 % 0 % 0 % 0 % $ 4.26 n/a n/a n/a 50 years 5-Jun-07 Aljustrel 100 % 16 0 % 0 % 0 % variable 17 n/a n/a n/a 50 years 5-Jun-07 Keno Hill 25 % 0 % 0 % 0 % variable 18 n/a n/a n/a Life of Mine 2-Oct-08 Pascua-Lama 25 % 0 % 0 % 0 % $ 3.90 n/a n/a n/a Life of Mine 8-Sep-09 Rosemont 100 % 100 % 0 % 0 % $ 3.90 $ 450 n/a n/a Life of Mine 10-Feb-10 Loma de La Plata 12.5 % 0 % 0 % 0 % $ 4.00 n/a n/a n/a Life of Mine n/a 19 777 100 % 50 % 0 % 0 % $ 6.14 6 $ 416 6 n/a n/a Life of Mine 8-Aug-12 Early Deposit Toroparu 50 % 10 % 0 % 0 % $ 3.90 $ 400 n/a n/a Life of Mine 11-Nov-13 Cotabambas 100 % 20 25 % 20 0 % 0 % $ 5.90 $ 450 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) Under the terms of the San Dimas precious metal purchase agreement, 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. 4) The Company is committed to pay Glencore 20% of the spot price of silver for each ounce of silver delivered under the Antamina silver purchase agreement. 5) 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. 6) Subject to an increase to $9.90 per ounce of silver and $550 per ounce of gold after the initial 40-year 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 life of mine. 8) The Company is committed to pay Sabanye 18% of the spot price of gold and palladium for each ounce of gold and palladium delivered under the Stillwater precious metal purchase agreement until such time as the upfront cash payment is reduced to $NIL 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 such time as the upfront cash payment is reduced to $NIL, 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 $8.85 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 $18.85 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 silver purchase agreement. 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 10,000 meters of Expansion Drilling in July 2018. 14) The Company is committed to acquire 100% of the first 30,000 ounces of gold produced per annum and 50% thereafter. 15) 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. 16) Wheaton only has the rights to silver contained in concentrate containing less than 15% copper at the Aljustrel mine. 17) During the second quarter of 2018, the Company agreed to amend the precious metal purchase agreement with Almina to increase the production payments to 50% of the amount received under the respective concentrate sales contracts and to fix silver payable rates for a period of two years and limit rate decreases thereafter. 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 silver and gold production for the life of mine. 22) The Company is committed to pay Kutcho 20% of the spot price of silver and gold for each ounce of silver and gold 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) 2018 2019 - 2021 2022 - 2023 After 2023 Sub-Total Other Total Bank debt 1 $ — $ — $ 956,500 $ — $ 956,500 $ — $ 956,500 Interest 2 17,558 122,593 47,466 — 187,617 — 187,617 Mineral stream interest payments 3 Rosemont 4 — — — — — 231,150 231,150 Loma de La Plata — — — — — 32,400 32,400 Toroparu — — — — — 138,000 138,000 Cotabambas 750 4,500 2,500 — 7,750 126,000 133,750 Kutcho 3,500 — — — 3,500 58,000 61,500 Stillwater 5 502,500 — — — 502,500 — 502,500 Operating leases 634 3,262 1,728 1,148 6,772 — 6,772 Total contractual obligations $ 524,942 $ 130,355 $ 1,008,194 $ 1,148 $ 1,664,639 $ 585,550 $ 2,250,189 1) At June 30, 2018, the Company had $957 million 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, 2018 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. 5) Includes contingent transaction costs of $3 million
Summary of Current Status of CRA	For ease of reference, the following provides an overview of the current status of CRA matters relating to income earned by the Company’s foreign subsidiaries outside of Canada: Taxation Years CRA Position/Status Potential Income Inclusion Potential Income Tax Payable (1) Payments Made Timing 2005-2010 Transfer pricing provisions of the Act should apply such that Wheaton’s income subject to tax in Canada should be increased by an amount equal to substantially all of the income earned outside of Canada by Wheaton’s foreign subsidiaries. CRA has reassessed Wheaton and is seeking to increase Wheaton’s income subject to tax in Canada by Cdn$715 million. CRA has reassessed Wheaton and is seeking to impose income tax of $153 million (Cdn$201 (2),(3) Wheaton has posted security in the form of letters of guarantee totaling $162 million (Cdn$213 million) reflecting 50% of all assessed tax, penalties and interest accrued to March 15, (3),(4) An appeal in the Tax Court of Canada commenced January 8, 2016. Trial scheduled to commence mid-September 2011-2015 CRA commenced an audit of 2011-2015 taxation years. CRA has not If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to increase Wheaton’s income subject to tax in Canada by approximately $1.9 billion. (5), (8) If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to impose income tax of approximately $384 million (Cdn$505 (5), (6), (8) N/A Time to complete CRA audit unknown. 2016-2017 Remains open to audit by CRA. If CRA were to audit and then reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to increase Wheaton’s income subject to tax in Canada by approximately $580 million. (5), (8) If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to impose income tax of approximately $149 million (Cdn$197 (5),(7),(8) N/A N/A 1) For the taxation years ended after December 31, 2010, the Company files its Canadian tax returns in US dollars. However, taxes payable, if any, are payable in Canadian dollars based on the exchange rate applicable on the original payment due date. As a result, the US dollar amounts reflected in the table above are subject to fluctuations in the value of the Canadian dollar relative to the US dollar. Canadian dollar amounts in this table have been converted to US dollars at the exchange rate applicable at the balance sheet date as quoted by the Bank of Canada. 2) For the 2005-2010 taxation years, transfer pricing penalties of $54 million (Cdn$72 million) and interest and other penalties of $61 million (Cdn$81 million) were also assessed by the CRA. The total reassessment issued on September 24, 2015 was $268 million (Cdn$353 million). Additional interest accruing to December 31, 2017 on the total amount reassessed is estimated at $34 million (Cdn$45 million) for the 2005-2010 taxation years. 3) As a consequence of the CRA’s reassessment of the 2005-2010 taxation years and the 2013 Domestic Reassessment, CRA reassessed the 2011 and 2012 taxation years to amend the non-capital losses available to offset the taxable income of $12 million and $14 million, respectively. As a result of the 2013 Domestic Reassessment, additional tax, interest, and penalties of about $1.6 million (Cdn$2.2 million) was owing for the 2011 and 2012 taxation years. The Company will be filing Notices of Objection with respect to these reassessments and accordingly, the Company will be required to pay 50% of the additional amounts owing. These reassessments do not relate to the CRA international audit of the 2011-2015 taxation years. 4) Estimates of interest given as of the date stated. Interest accrues until payment date. 5) The estimates of income inclusion and tax payable are computed on the basis that the cost of precious metal acquired under the PMPAs is equal to the cash cost plus an amortized amount of the up-front non-capital 6) If CRA were to reassess the 2011-2015 taxation years and continue to apply transfer pricing penalties, management estimates that transfer pricing penalties of approximately $187 million and interest (calculated to December 31, 2017) and other penalties of approximately $110 million (Cdn$145 million) may be applicable for the 2011-2015 taxation years. 7) If CRA were to reassess the 2016-2017 taxation years and continue to apply transfer pricing penalties, management estimates that transfer pricing penalties of approximately $58 million and interest (calculated to December 31, 2017) and other penalties of approximately $9 million (Cdn$12 million) may be applicable for the 2016-2017 taxation years. 8) If the cost of precious metal acquired under the PMPAs is equal to the market value of precious metal while the deposit is outstanding (where applicable to an agreement), and the cash cost thereafter, the estimated amounts for the 2011 – 2015 taxation years would be as follows: (i) income inclusion of $1.6 billion; (ii) tax payable of $331 million (Cdn$435 million); (iii) transfer pricing penalties (if applied) of $161 million; and (iv) interest and other penalties of $93 million (Cdn$123 million). On this basis, the estimated amounts for the 2016 – 2017 taxation years would be as follows: (i) income inclusion of $260 million; (ii) tax payable of $68 million (Cdn$89 million); (iii) transfer pricing penalties (if applied) of $26 million; and (iv) interest and other penalties of $4 million (Cdn$6 million).

Segmented Information (Tables)

Segmented Information (Tables)	6 Months Ended
	Jun. 30, 2018
Text block1 [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, 2018 (in thousands) Sales Cost Depletion Gross Gain on Net Cash Flow Total Silver San Dimas 1 $ 17,673 $ 4,622 $ 1,567 $ 11,484 $ 245,715 $ 257,199 $ 13,051 $ — Peñasquito 25,315 6,452 4,572 14,291 — 14,291 18,863 395,052 Antamina 23,736 4,676 12,369 6,691 — 6,691 19,060 732,979 Constancia 6,826 2,418 2,927 1,481 — 1,481 4,409 254,773 Other 2 25,097 8,939 5,279 10,879 — 10,879 16,014 511,851 Total silver interests $ 98,647 $ 27,107 $ 26,714 $ 44,826 $ 245,715 $ 290,541 $ 71,397 $ 1,894,655 Gold Sudbury 3 $ 5,778 $ 1,760 $ 3,498 $ 520 $ — $ 520 $ 4,020 $ 372,366 Salobo 92,327 28,294 27,316 36,717 — 36,717 64,033 2,760,314 Constancia 2,857 869 812 1,176 — 1,176 1,989 120,025 San Dimas 1 4,733 2,243 2,079 411 — 411 2,490 218,158 Other 4 8,058 2,307 2,075 3,676 — 3,676 5,850 26,950 Total gold interests $ 113,753 $ 35,473 $ 35,780 $ 42,500 $ — $ 42,500 $ 78,382 $ 3,497,813 Cobalt Voisey’s Bay $ — $ — $ — $ — $ — $ — $ — $ 393,327 Total mineral stream interests $ 212,400 $ 62,580 $ 62,494 $ 87,326 $ 245,715 $ 333,041 $ 149,779 $ 5,785,795 Corporate General and administrative $ (11,972 ) $ (7,627 ) Interest expense (5,659 ) (5,459 ) Other (492 ) (1,493 ) Income tax recovery 3,224 — Total corporate $ (14,899 ) $ (14,579 ) $ 430,317 Consolidated $ 318,142 $ 135,200 $ 6,216,112 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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, Aljustrel, and 777 silver interests, the non-operating Keno Hill, Loma de La Plata, Pascua-Lama and Rosemont silver interests as well as the previously owned Lagunas Norte, Pierina and Veladero silver interests which expired on March 31, 2018. 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating Victor gold interest and the Stobie gold interest which was placed into care and maintenance during the second quarter of 2017. 4) 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 Rosemont gold interest. Three Months Ended June 30, 2017 (in thousands) Sales Cost Depletion Net Cash Flow Total Silver San Dimas 1 $ 14,298 $ 3,617 $ 1,238 $ 9,443 $ 10,680 $ 138,173 Peñasquito 28,519 6,769 4,724 17,026 21,750 410,876 Antamina 24,873 5,087 14,257 5,529 15,729 790,072 Constancia 9,659 3,296 4,113 2,250 6,363 269,036 Other 2 31,465 9,942 6,821 14,702 21,216 766,091 Total silver interests $ 108,814 $ 28,711 $ 31,153 $ 48,950 $ 75,738 $ 2,374,248 Gold Sudbury 3 $ 7,264 $ 2,329 $ 4,480 $ 455 $ 4,930 $ 391,757 Salobo 63,577 20,191 19,223 24,163 43,386 2,861,619 Constancia 2,949 942 964 1,043 2,007 123,758 Other 4 17,080 4,808 3,952 8,320 12,192 39,240 Total gold interests $ 90,870 $ 28,270 $ 28,619 $ 33,981 $ 62,515 $ 3,416,374 Total mineral stream interests $ 199,684 $ 56,981 $ 59,772 $ 82,931 $ 138,253 $ 5,790,622 Corporate General and administrative $ (9,069 ) $ (6,869 ) Interest expense (6,482 ) (6,513 ) Other (324 ) (190 ) Income tax recovery 556 — Total corporate $ (15,319 ) $ (13,572 ) $ 205,388 Consolidated $ 67,612 $ 124,681 $ 5,996,010 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating 4) 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 Six Months Ended June 30, 2018 (in thousands) Sales Cost Depletion Gross Gain on Net Cash Flow Total Silver San Dimas 1 $ 40,594 $ 10,549 $ 3,575 $ 26,470 $ 245,715 $ 272,185 $ 30,045 $ — Peñasquito 45,935 11,568 8,198 26,169 — 26,169 34,367 395,052 Antamina 47,506 9,496 24,659 13,351 — 13,351 38,010 732,979 Constancia 16,406 5,807 7,030 3,569 — 3,569 10,599 254,773 Other 2 54,372 18,186 11,284 24,902 — 24,902 36,037 511,851 Total silver interests $ 204,813 $ 55,606 $ 54,746 $ 94,461 $ 245,715 $ 340,176 $ 149,058 $ 1,894,655 Gold Sudbury 3 $ 12,679 $ 3,834 $ 7,622 $ 1,223 $ — $ 1,223 $ 8,968 $ 372,366 Salobo 165,162 50,152 48,418 66,592 — 66,592 115,010 2,760,314 Constancia 7,168 2,168 2,026 2,974 — 2,974 5,001 120,025 San Dimas 1 4,733 2,243 2,079 411 — 411 2,490 218,158 Other 4 17,097 4,991 4,868 7,238 — 7,238 11,001 26,950 Total gold interests $ 206,839 $ 63,388 $ 65,013 $ 78,438 $ — $ 78,438 $ 142,470 $ 3,497,813 Cobalt Voisey’s Bay $ — $ — $ — $ — $ — $ — $ — $ 393,327 Total mineral stream interests $ 411,652 $ 118,994 $ 119,759 $ 172,899 $ 245,715 $ 418,614 $ 291,528 $ 5,785,795 Corporate General and administrative $ (21,729 ) $ (17,497 ) Interest expense (11,249 ) (11,055 ) Other (3,080 ) (2,436 ) Income tax recovery 3,709 — Total corporate $ (32,349 ) $ (30,988 ) $ 430,317 Consolidated $ 386,265 $ 260,540 $ 6,216,112 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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, Aljustrel, and 777 silver interests, the non-operating 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating 4) 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 Six Months Ended June 30, 2017 (in thousands) Sales Cost Depletion Net Cash Flow Total Silver San Dimas 1 $ 28,265 $ 7,022 $ 2,402 $ 18,841 $ 21,243 $ 138,173 Peñasquito 43,214 10,320 7,201 25,693 32,894 410,876 Antamina 44,851 9,134 25,734 9,983 35,717 790,072 Constancia 16,346 5,557 6,935 3,854 10,586 269,036 Other 2 67,302 20,378 14,544 32,380 44,695 766,091 Total silver interests $ 199,978 $ 52,411 $ 56,816 $ 90,751 $ 145,135 $ 2,374,248 Gold Sudbury 3 $ 15,637 $ 5,083 $ 9,778 $ 776 $ 10,523 $ 391,757 Salobo 140,206 45,394 43,216 51,596 94,812 2,861,619 Constancia 5,756 1,869 1,912 1,975 3,874 123,758 Other 4 36,058 10,515 11,993 13,550 21,186 39,240 Total gold interests $ 197,657 $ 62,861 $ 66,899 $ 67,897 $ 130,395 $ 3,416,374 Total mineral stream interests $ 397,635 $ 115,272 $ 123,715 $ 158,648 $ 275,530 $ 5,790,622 Corporate General and administrative $ (16,967 ) $ (17,344 ) Interest expense (12,854 ) (12,902 ) Other (419 ) (680 ) Income tax recovery 428 — Total corporate $ (29,812 ) $ (30,926 ) $ 205,388 Consolidated $ 128,836 $ 244,604 $ 5,996,010 1) On May 10, 2018, the Company terminated the San Dimas SPA and concurrently entered into the San Dimas PMPA. 2) 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 Keno Hill, Aljustrel, Loma de La Plata, Pascua-Lama and Rosemont silver interests, the previously owned Lagunas Norte, Pierina and Veladero silver interests which expired on March 31, 2018 and the previously owned Cozamin silver interest which expired on April 4, 2017. 3) Comprised of the operating Coleman, Copper Cliff, Garson, Creighton and Totten gold interests, the non-operating Victor gold interest and the Stobie gold interest which was placed into care and maintenance during the second quarter of 2017. 4) 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 Rosemont gold interest.
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 (in thousands) Three Months Six Months Silver Gold Cobalt Total North America Canada $ 15,448 7 % $ 33,917 8% $ 35,546 $ 399,317 $ 393,327 $ 828,190 14 % United States — 0 % — 0% 433 — — 433 0 % Mexico 48,285 23 % 92,693 23% 396,458 218,158 — 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% 1,128,935 120,024 — 1,248,959 22 % Consolidated $ 212,400 100 % $ 411,652 100% $ 1,894,655 $ 3,497,813 $ 393,327 $ 5,785,795 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile. Sales Carrying Amount at (in thousands) Three Months Six Months Silver Gold Cobalt Total North America Canada $ 27,106 14 % $ 57,519 15% $ 38,775 $ 430,997 $ — $ 469,772 8 % United States — 0 % — 0% 433 — — 433 0 % Mexico 45,195 23 % 78,828 20% 550,809 — — 550,809 10 % Europe Greece 2,021 1 % 5,445 1% 11,347 — — 11,347 0 % Portugal 1,918 1 % 4,659 1% 24,135 — — 24,135 0 % Sweden 6,750 3 % 12,340 3% 41,064 — — 41,064 1 % South America Argentina/Chile 1 2,496 1 % 5,171 1% 497,612 — — 497,612 9 % Brazil 63,577 32 % 140,206 35% — 2,861,619 — 2,861,619 49 % Peru 50,621 25 % 93,467 24% 1,210,073 123,758 — 1,333,831 23 % Consolidated $ 199,684 100 % $ 397,635 100% $ 2,374,248 $ 3,416,374 $ — $ 5,790,622 100 % 1) Includes the Pascua-Lama project, which straddles the border of Argentina and Chile.

Description of Business and N57

Description of Business and Nature of Operations - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018AgreementAsset
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	16
Number of currently operating mining assets | Asset	19
Number of mining assets under various stages of development | Asset	9
Number of countries operating mining assets | Asset	11

Significant Accounting Polici58

Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Jan. 01, 2019USD ($)
Disclosure of significant accounting policies [abstract]
Right of uses assets under IFRS 16	$ 3
Reduction in operating cash out flow upon adoption of IFRS 16	$ 1

Key Sources of Estimation Unc59

Key Sources of Estimation Uncertainty and Critical Accounting Judgments - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Disclosure of key sources of estimation uncertainty [line items]
Mineral stream interests	$ 5,785,795,000	$ 5,423,277,000
Kutcho Copper Corp [member]
Disclosure of key sources of estimation uncertainty [line items]
Percentage of ownership interest in associate	13.00%
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, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Disclosure of fair value measurement of assets and liabilities [line items]
Cash and cash equivalents	$ 92,661	$ 115,568	$ 98,521	$ 76,575	$ 114,749	$ 124,295
Trade receivables from provisional concentrate sales, net of fair value adjustment	783		1,398
Long-term investments - common shares held	261,159		95,608	$ 80,595
Long-term investments - warrants held	13		124
Convertible note receivable	13,723		15,777
Total net financial assets measured at fair value	368,339		211,428
Investments in equity instruments designated at fair value through other comprehensive income [member]
Disclosure of fair value measurement of assets and liabilities [line items]
Long-term investments - common shares held	261,159		95,608
Level 1 [member]
Disclosure of fair value measurement of assets and liabilities [line items]
Cash and cash equivalents	92,661		98,521
Total net financial assets measured at fair value	353,820		194,129
Level 1 [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]
Disclosure of fair value measurement of assets and liabilities [line items]
Long-term investments - common shares held	261,159		95,608
Level 2 [member]
Disclosure of fair value measurement of assets and liabilities [line items]
Trade receivables from provisional concentrate sales, net of fair value adjustment	783		1,398
Long-term investments - warrants held	13		124
Total net financial assets measured at fair value	796		1,522
Level 3 [member]
Disclosure of fair value measurement of assets and liabilities [line items]
Convertible note receivable	13,723		15,777
Total net financial assets measured at fair value	$ 13,723		$ 15,777

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
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
Kutcho [member]
Disclosure of detailed information about financial instruments [line items]
Non convertible debt interest rate	15.00%
Volatility rate	30.00%
Interest rate description	If (i) the market interest rate used had been 2% lower or higher at the respective balance sheet date; or (ii) the implied volatility used had been 10% higher or lower at the respective balance sheet date, then the value of the Kutcho Convertible Note receivable would have increased or decreased by approximately $1 million.
Increase decrease in convertible note receivable	$ 1,000,000

Revenue - Summary of Revenue (D

Revenue - Summary of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue [abstract]
Silver credit sales	$ 87,620	$ 95,799	$ 182,109	$ 170,228
Concentrate sales	11,027	13,015	22,704	29,750
Revenue from sale of silver	$ 98,647	$ 108,814	$ 204,813	$ 199,978
Silver credit sales	41.00%	48.00%	44.00%	43.00%
Concentrate sales	5.00%	6.00%	6.00%	7.00%
Revenue from sale	46.00%	54.00%	50.00%	50.00%
Gold credit sales	$ 110,688	$ 81,696	$ 201,545	$ 177,195
Concentrate sales	3,065	9,174	5,294	20,462
Revenue from sale of gold	113,753	90,870	206,839	197,657
Total sales revenue	$ 212,400	$ 199,684	$ 411,652	$ 397,635
Gold credit sales	52.00%	41.00%	49.00%	45.00%
Concentrate sales	2.00%	5.00%	1.00%	5.00%
Revenue from sale	54.00%	46.00%	50.00%	50.00%
Total sales revenue	100.00%	100.00%	100.00%	100.00%

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - Contract	Jun. 30, 2018	Dec. 31, 2017
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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Salaries and benefits
Salaries and benefits, excluding PSUs		$ 3,458	$ 3,120	$ 7,049	$ 6,345
PSUs		3,316	(23)	3,499	(457)
Total salaries and benefits		6,774	3,097	10,548	5,888
Depreciation		233	245	473	487
Donations		439	449	1,138	831
Professional fees		515	1,212	1,876	1,873
Other		2,617	2,793	5,051	5,419
Cash settled general and administrative		10,578	7,796	19,086	14,498
Total equity settled stock based compensation		1,394	1,273	2,643	2,469
Total general and administrative	[1]	11,972	9,069	21,729	16,967
Employee stock options [member]
Salaries and benefits
Total equity settled stock based compensation		584	680	1,235	1,662
Restricted stock units [member]
Salaries and benefits
Total equity settled stock based compensation		$ 810	$ 593	$ 1,408	$ 807
[1]	Equity settled stock based compensation (a non-cash item) included in general and administrative expenses $ 1,394 $ 1,273 $ 2,643 $ 2,469

General and Administrative - 65

General and Administrative - Summary of General and Administrative Expense (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Significant non cash charges [Abstract]
Average performance factor used to calculate the accrual related to the anticipated fair value of the PSUs issue	83.00%	14.00%	83.00%	14.00%

Other Income - Summary of Other

Other Income - Summary of Other Income (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of Other Operating Income [Abstract]
Dividend income	$ 19	$ 15		$ 39	$ 30
Interest income	661	72		1,227	133
Proceeds relative to the Mercator Minerals bankruptcy			$ 1,000		1,022
Guarantee fees - Primero Revolving Credit Facility	858			858
Fees for contract amendments and reconciliations		988		248	988
Total other income	$ 1,538	$ 1,075		$ 2,372	$ 2,173

Other Income - Additional Infor

Other Income - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 30, 2017	Mar. 31, 2017	Jun. 30, 2017
Disclosure of other operating income [line items]
Proceeds relative to the Mercator Minerals bankruptcy		$ 1,000	$ 1,022
Primero Mining Corp [member]
Disclosure of other operating income [line items]
Guarantee fee as percentage of outstanding loan in connection with guarantee and extensions of guarantee	5.00%

Other Expense - Summary of Othe

Other Expense - Summary of Other Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Expenses by nature [abstract]
Stand-by fees	$ 974	$ 715	$ 1,891	$ 1,356
Agency fees			50	50
Amortization of credit facility origination fees - undrawn facilities	245	179	476	340
Letter of guarantee	490	457	807	754
Share of losses of associate			201
Other		7	5	7
Total other expense	$ 1,709	$ 1,358	$ 3,430	$ 2,507

Unrealized Fair Value Losses 69

Unrealized Fair Value Losses (Gains) , Net - Summary of Unrealized Fair Value Losses (Gains), Net (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Disclosure Of Unrealized Fair Value Losses (Gains) [abstract]
Loss on fair value adjustment of convertible note receivable	$ 283	$ 2,054
Loss on fair value adjustment of share purchase warrants held	12	111
Total unrealized fair value losses (gains), net	$ 295	$ 2,165

Accounts Receivable - Summary o

Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Trade and other receivables [abstract]
Trade receivables from provisional concentrate sales, net of fair value adjustment	$ 783	$ 1,398
Other accounts receivables	6,092	1,796
Total accounts receivable	$ 6,875	$ 3,194

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Disclosure Of Mineral Stream Interests [line items]
Ending balance	$ 5,785,795	$ 5,790,622	$ 5,785,795	$ 5,790,622
Depletion	62,494	59,772	119,759	123,715
Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			2,080,688
Ending balance	1,894,655	2,374,248	1,894,655	2,374,248	$ 2,080,688
Depletion	26,714	(31,153)	54,746	(56,816)
Silver interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			134,862
Ending balance					134,862
Silver interests [member] | Penasquito [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			403,250
Ending balance	395,052		395,052		403,250
Silver interests [member] | Antamina [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			757,638
Ending balance	732,979		732,979		757,638
Silver interests [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			261,803
Ending balance	254,773		254,773		261,803
Silver interests [member] | Other silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			523,135
Ending balance	511,851		511,851		523,135
Silver interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			3,201,085	3,247,979	3,247,979
Disposal			(190,331)		(41,959)
Ending balance	3,010,754		3,010,754		3,201,085
Reductions					(4,935)
Silver interests [member] | Cost [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			190,331	190,331	190,331
Disposal			(190,331)
Ending balance					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			1,282,837	1,329,731	1,329,731
Disposal					(41,959)
Ending balance	1,282,837		1,282,837		1,282,837
Reductions					(4,935)
Silver interests [member] | Accumulated Depletion & Impairment [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(1,120,397)	(811,980)	(811,980)
Disposal			59,044		41,959
Ending balance	(1,116,099)		(1,116,099)		(1,120,397)
Depletion			(54,746)		(121,696)
Impairment					(228,680)
Silver interests [member] | Accumulated Depletion & Impairment [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(55,469)	(49,756)	(49,756)
Disposal			59,044
Ending balance					(55,469)
Depletion			(3,575)		(5,713)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Penasquito [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(121,376)	(106,549)	(106,549)
Ending balance	(129,574)		(129,574)		(121,376)
Depletion			(8,198)		(14,827)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Antamina [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(142,705)	(84,537)	(84,537)
Ending balance	(167,364)		(167,364)		(142,705)
Depletion			(24,659)		(58,168)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(41,145)	(26,977)	(26,977)
Ending balance	(48,175)		(48,175)		(41,145)
Depletion			(7,030)		(14,168)
Silver interests [member] | Accumulated Depletion & Impairment [member] | Other silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(759,702)	(544,161)	(544,161)
Disposal					41,959
Ending balance	(770,986)		(770,986)		(759,702)
Depletion			(11,284)		(28,820)
Impairment					(228,680)
Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			3,342,589
Ending balance	3,497,813	3,416,374	3,497,813	3,416,374	3,342,589
Depletion	35,780	(28,619)	65,013	(66,899)
Gold interests [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			379,988
Ending balance	372,366		372,366		379,988
Gold interests [member] | Salobo [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			2,808,732
Ending balance	2,760,314		2,760,314		2,808,732
Gold interests [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			122,051
Ending balance	120,025		120,025		122,051
Gold interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Ending balance	218,158		218,158
Gold interests [member] | Other gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			31,818
Ending balance	26,950		26,950		31,818
Gold interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			4,222,030	4,222,030	4,222,030
Additions			220,237
Ending balance	4,442,267		4,442,267		4,222,030
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]
Additions			220,237
Ending balance	220,237		220,237
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			(879,441)	(738,757)	(738,757)
Ending balance	(944,454)		(944,454)		(879,441)
Depletion			(65,013)		(140,684)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(243,876)	(222,329)	(222,329)
Ending balance	(251,498)		(251,498)		(243,876)
Depletion			(7,622)		(21,547)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Salobo [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(251,144)	(155,041)	(155,041)
Ending balance	(299,562)		(299,562)		(251,144)
Depletion			(48,418)		(96,103)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(14,007)	(10,388)	(10,388)
Ending balance	(16,033)		(16,033)		(14,007)
Depletion			(2,026)		(3,619)
Gold interests [member] | Accumulated Depletion & Impairment [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Ending balance	(2,079)		(2,079)
Depletion			(2,079)
Gold interests [member] | Accumulated Depletion & Impairment [member] | Other gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(370,414)	(350,999)	(350,999)
Ending balance	(375,282)		(375,282)		(370,414)
Depletion			(4,868)		(19,415)
Cobalt Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Ending balance	393,327		393,327
Cobalt Interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Additions			393,327
Ending balance	393,327		393,327
Mineral Stream Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			5,423,277
Ending balance	5,785,795		5,785,795		5,423,277
Depletion	62,494	$ (59,772)	119,759	(123,715)
Mineral Stream Interests [member] | Cost [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			7,423,115	7,470,009	7,470,009
Additions			613,564
Disposal			(190,331)		(41,959)
Ending balance	7,846,348		7,846,348		7,423,115
Reductions					(4,935)
Mineral Stream Interests [member] | Accumulated Depletion & Impairment [member]
Disclosure Of Mineral Stream Interests [line items]
Beginning balance			(1,999,838)	$ (1,550,737)	(1,550,737)
Disposal			59,044		41,959
Ending balance	$ (2,060,553)		(2,060,553)		(1,999,838)
Depletion			$ (119,759)		(262,380)
Impairment					$ (228,680)

Mineral Stream Interests - Sc72

Mineral Stream Interests - Schedule of Mineral Stream Interests (Parenthetical) (Detail) - USD ($) shares in Millions, $ in Millions	Apr. 10, 2017	Jun. 30, 2018	Dec. 31, 2017
Alexco Resource Corp [member]
Disclosure Of Mineral Stream Interests [line items]
Common shares received	3
Fair value of shares received	$ 5
Accumulated impairment [member] | Keno Hill [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges		$ 11	$ 11
Accumulated impairment [member] | Pascua-Lama [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges		338	338
Accumulated impairment [member] | Seven hundred and seventy seven [member] | Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges		64	64
Accumulated impairment [member] | Sudbury [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges		120	120
Accumulated impairment [member] | Seven hundred and seventy seven [member] | Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Cumulative impairment charges		$ 151	$ 151

Mineral Stream Interests - Clas

Mineral Stream Interests - Classification of Mining Interest (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	$ 1,003,417	$ 1,044,132
Non-Depletable	891,238	1,036,556
Total	1,894,655	2,080,688
Silver interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable		38,110
Non-Depletable		96,752
Total		134,862
Silver interests [member] | Penasquito [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	290,524	293,968
Non-Depletable	104,528	109,282
Total	395,052	403,250
Silver interests [member] | Antamina [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	376,581	380,738
Non-Depletable	356,398	376,900
Total	732,979	757,638
Silver interests [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	239,525	240,950
Non-Depletable	15,248	20,853
Total	254,773	261,803
Silver interests [member] | Other silver interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	96,787	90,366
Non-Depletable	415,064	432,769
Total	511,851	523,135
Gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	2,788,468	2,683,804
Non-Depletable	709,345	658,785
Total	3,497,813	3,342,589
Gold interests [member] | Sudbury [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	313,944	315,421
Non-Depletable	58,422	64,567
Total	372,366	379,988
Gold interests [member] | Salobo [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	2,225,545	2,224,133
Non-Depletable	534,769	584,599
Total	2,760,314	2,808,732
Gold interests [member] | Constancia [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	110,881	112,432
Non-Depletable	9,144	9,619
Total	120,025	122,051
Gold interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	111,148
Non-Depletable	107,010
Total	218,158
Gold interests [member] | Other gold interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	26,950	31,818
Total	26,950	31,818
Cobalt Interests [member] | Voisey's Bay [member]
Disclosure Of Mineral Stream Interests [line items]
Non-Depletable	393,327
Total	393,327
Mineral Stream Interests [member]
Disclosure Of Mineral Stream Interests [line items]
Depletable	3,791,885	3,727,936
Non-Depletable	1,993,910	1,695,341
Total	$ 5,785,795	$ 5,423,277

Mineral Stream Interests - Addi

Mineral Stream Interests - Additional Information (Detail) oz in Millions, lb in Millions	Jun. 11, 2018USD ($)lb	May 10, 2018USD ($)shares	Jun. 30, 2018USD ($)Gold_Ounce	Aug. 06, 2010oz	Oct. 15, 2004
Disclosure Of Mineral Stream Interests [line items]
Percentage of outstanding shares owned			11.00%
Upfront cash consideration paid			$ 25,250,000
First Majestic [member]
Disclosure Of Mineral Stream Interests [line items]
Percentage of outstanding shares owned			11.00%
First Majestic [member] | Restructuring of san dimas precious metal purchase agreement [member]
Disclosure Of Mineral Stream Interests [line items]
Number of common shares received | shares		20,914,590
Fair value of shares received		$ 151,000,000
San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Cash consideration received upon disposal of mineral stream interest			$ 220,000,000
San Dimas [member] | First Majestic [member]
Disclosure Of Mineral Stream Interests [line items]
Fair value of shares received			151,000,000
Goldcorp Inc. [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Cash consideration received upon terminating silver delivery guarantee			$ 10,000,000
Gold interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable 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 interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Upfront cash consideration paid			$ 220,000,000
Silver interests [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Cash consideration received upon disposal of mineral stream interest		220,000,000
Gain on disposal of silver streaming interest		246,000,000
Silver interests [member] | Goldcorp Inc. [member] | San Dimas [member] | Restructuring of san dimas precious metal purchase agreement [member]
Disclosure Of Mineral Stream Interests [line items]
Cash consideration received upon terminating silver delivery guarantee		$ 10,000,000
Silver [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable Production to be Purchased			0.00%
Silver [member] | San Dimas [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%
Gold [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable Production to be Purchased			50.00%
Per Ounce Cash Payment			600
Gold [member] | San Dimas [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable 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
Per Ounce Cash Payment | Gold_Ounce			600
Cobalt [member] | San Dimas [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable Production to be Purchased			0.00%
Cobalt [member] | Voisey's Bay [member]
Disclosure Of Mineral Stream Interests [line items]
Attributable Payable Production to be Purchased	42.40%
Upfront cash consideration paid	$ 390,000,000
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%
Per pound cash payment as a percentage of the spot price of metal delivered	18.00%
Balance of upfront cash deposit required for price change to take place	$ 0
Percentage of spot price of metal thereafter	22.00%
Fixed payable rate	93.30%

Mineral Stream Interests - Summ

Mineral Stream Interests - Summary of Disposal of San Dimas Silver 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 of the San Dimas SPA	$ 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 of the San Dimas SPA		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

Early Deposit Mineral Stream 76

Early Deposit Mineral Stream Interests - Summary of Early Deposit Mineral Stream Interests (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
Disclosure Of Mineral Stream Interests [line items]
Upfront Consideration Paid to Date	$ 25,250
Upfront Consideration to be Paid	333,250
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	$ 6,250
Upfront Consideration to be Paid	133,750
Total Upfront Consideration	$ 140,000
Silver	100.00%
Gold	25.00%
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
Silver	50.00%
Gold	10.00%
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	$ 3,500
Upfront Consideration to be Paid	61,500
Total Upfront Consideration	$ 65,000
Silver	100.00%
Gold	100.00%
Term of Agreement	Life of Mine

Early Deposit Mineral Stream 77

Early Deposit Mineral Stream Interests - Summary of Early Deposit Mineral Stream Interests (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2018oz
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%
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
Gold [member] | Kutcho [member]
Disclosure Of Mineral Stream Interests [line items]
Gold ounces to be delivered before entitlement step down takes effect	51,000

Early Deposit Mineral Stream 78

Early Deposit Mineral Stream Interests - Additional Information (Detail) - San Dimas [member] - Gold interests [member]	6 Months Ended
	Jun. 30, 2018
Disclosure Of Mineral Stream Interests [line items]
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.

Mineral Royalty Interest - Addi

Mineral Royalty Interest - Additional Information (Detail) - Metates Properties [member] - USD ($)	6 Months Ended
	Jun. 30, 2018	Aug. 07, 2014
Disclosure Of Royalty Arrangements [line items]
Net smelter return royalty percentage	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) - Kutcho [member] $ in Millions, $ in Millions	Jan. 31, 2018shares	Dec. 14, 2017USD ($)	Dec. 14, 2017CAD ($)	Jun. 30, 2018	Dec. 14, 2017CAD ($)
Equity investment [member]
Disclosure of associates and joint ventures [line items]
Number of shares of associate owned				6,153,846
Total consideration		$ 3	$ 4
Amount advanced in exchange for convertible note receivable		$ 16			$ 20
Coupon rate on convertible note receivable				10.00%
Number of shares issued and outstanding by associate	47,770,378
Fully diluted ownership percentage of associate	36.00%
Non-fully diluted potential ownership percentage of associate	45.00%
Undiluted ownership percentage of associate	13.00%
Investment in warrants [member]
Disclosure of associates and joint ventures [line items]
Number of share purchase warrants of associate owned				3,076,923

Investment in Associate - Discl

Investment in Associate - Disclosure of Investment in Associate (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Disclosure of associates and joint ventures [line items]
Carrying Amount	$ 2,793	$ 2,994
Equity investment [member] | Kutcho [member]
Disclosure of associates and joint ventures [line items]
Carrying Amount	2,793	$ 2,994
Share of Associate Losses Included in Net Earnings	$ (201)

Convertible Note Receivable - A

Convertible Note Receivable - Additional Information (Detail) - Convertible note receivable [member] - Kutcho [member] $ / shares in Units, $ in Millions, $ in Millions	Dec. 14, 2017USD ($)	Jun. 30, 2018	Dec. 14, 2017CAD ($)$ / shares
Convertible note receivable [Line Items]
Amount advanced in exchange for convertible note receivable	$ 16		$ 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	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			$ 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, 2018	Jun. 30, 2018	Dec. 31, 2017
Convertible note receivable [abstract]
Convertible Note Receivable Fair Value	$ 13,723	$ 13,723	$ 15,777
Fair value adjustment	$ (283)	$ (2,054)

Long-Term Equity Investments -

Long-Term Equity Investments - Summary of Long-Term Equity Investments (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Long term investments 1 [Abstract]
Long-term investments - common shares held	$ 261,159	$ 95,608	$ 80,595
Long-term investments - warrants held	13	124
Long-term investments	$ 261,172	$ 95,732

Long-Term Equity Investments 85

Long-Term Equity Investments - Summary of Common Shares Held (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Long term investments - common shares held [Line Items]
Fair value	$ 261,159	$ 80,595	$ 261,159	$ 80,595	$ 95,608
Fair value adjustment gains (losses) included in OCI	16,663	7,475	13,534	11,038
Bear Creek [member]
Long term investments - common shares held [Line Items]
Fair value	17,829	21,465	17,829	21,465	21,358
Fair value adjustment gains (losses) included in OCI	(5,831)	(1,236)	(3,528)	(1,752)
Sabina [member]
Long term investments - common shares held [Line Items]
Fair value	13,505	18,032	13,505	18,032	21,171
Fair value adjustment gains (losses) included in OCI	(831)	4,506	(7,665)	9,492
Arizona Mining [member]
Long term investments - common shares held [Line Items]
Fair value	46,780	21,962	46,780	21,962	27,581
Fair value adjustment gains (losses) included in OCI	15,370	5,823	19,199	3,714
First Majestic [member]
Long term investments - common shares held [Line Items]
Fair value	159,578		159,578
Fair value adjustment gains (losses) included in OCI	8,578		8,578
Other [member]
Long term investments - common shares held [Line Items]
Fair value	23,467	19,136	23,467	19,136	$ 25,498
Fair value adjustment gains (losses) included in OCI	$ (623)	$ (1,618)	$ (3,050)	$ (416)

Long-Term Equity Investments 86

Long-Term Equity Investments - Summary of Warrants Held (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Long Term Investments - warrants held [Line Items]
Long-term investments - warrants held	$ 13	$ 13	$ 124
Fair value adjustment on share purchase warrants held	12	111
Kutcho [member]
Long Term Investments - warrants held [Line Items]
Long-term investments - warrants held	13	13	$ 124
Fair value adjustment on share purchase warrants held	$ (12)	$ (111)

Long-Term Equity Investments 87

Long-Term Equity Investments - Additional Information (Detail) - First Majestic [member] - San Dimas [member] - USD ($) $ in Thousands	May 10, 2018	Jun. 30, 2018
Long term investments - common shares held [Line Items]
Fair value of shares received		$ 151,000
Silver interests [member]
Long term investments - common shares held [Line Items]
Number of common shares received	20,914,590
Fair value of shares received	$ 151,000

Credit Facilities - Bank Debt (

Credit Facilities - Bank Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Feb. 27, 2018	Dec. 31, 2017
Disclosure Of Bank Debt Facilities
Gross bank debt outstanding 1	$ 956,500		$ 770,000
Revolving Term Loan [member]
Disclosure Of Bank Debt Facilities
Current portion	0		0
Long-term portion	956,500		770,000
Gross bank debt outstanding 1	$ 956,500	$ 2,000,000	$ 770,000

Credit Facilities - Bank Debt89

Credit Facilities - Bank Debt (Parenthetical) (Detail) $ in Millions	Jun. 30, 2018USD ($)
Revolving Term Loan [member]
Disclosure Of Bank Debt Facilities
Unamortized debt issue	$ 6

Credit Facilities - Interest Ex

Credit Facilities - Interest Expense During Period (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure Of Line of Credit Facility [Abstract]
Average principle outstanding during period	$ 657,144	$ 1,024,166	$ 687,516	$ 1,065,683
Average effective interest rate during period	3.44%	2.53%	3.27%	2.41%
Total interest expense incurred during period	$ 5,659	$ 6,482	$ 11,249	$ 12,854

Credit Facilities - Additional

Credit Facilities - Additional Information (Detail) $ in Thousands, $ in Millions	Feb. 27, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 15, 2018USD ($)	Mar. 15, 2018CAD ($)	Dec. 31, 2017USD ($)	Mar. 15, 2017USD ($)	Mar. 15, 2017CAD ($)	Mar. 15, 2016USD ($)	Mar. 15, 2016CAD ($)
Disclosure Of Bank Debt Facilities
Amount		$ 956,500			$ 770,000
Percentage of outstanding shares owned		11.00%
Letter of Guarantee in favour of Her Majesty the Queen in Right of Canada [member]
Disclosure Of Bank Debt Facilities
Amount			$ 8,000	$ 10		$ 8,000	$ 11	$ 146,000	$ 192
Annual fee associated with Letter of Credit		1.00%
Revolving Term Loan [member]
Disclosure Of Bank Debt Facilities
Credit facility extension fees	$ 1,200
Amount	$ 2,000,000	$ 956,500			$ 770,000
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 0.75:1; 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, 2018.
Maximum net debt to tangible net worth ratio		75.00%
Minimum interest coverage ratio		300.00%
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%

Issued Capital - Summary of Cap

Issued Capital - Summary of Capital Issued (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Disclosure of Capital and Reserve [Line Items]
Issued capital	$ 3,489,643	$ 3,472,029
Issued Capital [member]
Disclosure of Capital and Reserve [Line Items]
Issued capital	$ 3,489,643	$ 3,472,029

Issued Capital - Summary of C93

Issued Capital - Summary of Capital Issued (Parenthetical) (Detail) - shares	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Disclosure of Capital and Reserve [Line Items]
Common shares outstanding	443,559,922	442,794,484	442,724,309	442,005,404	441,517,017	441,456,217
Issued Capital [member]
Disclosure of Capital and Reserve [Line Items]
Common shares issued	443,559,922		442,724,309
Common shares outstanding	443,559,922		442,724,309

Issued Capital - Additional Inf

Issued Capital - Additional Information (Detail)	Jun. 30, 2018$ / 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, 2018$ / sharesshares	Jun. 30, 2018$ / sharesshares	Mar. 31, 2018$ / sharesshares	Jun. 30, 2017$ / sharesshares	Jun. 30, 2017$ / sharesshares	Mar. 31, 2017$ / sharesshares	Mar. 31, 2017$ / sharesshares	Dec. 31, 2017$ / sharesshares	Dec. 31, 2017$ / sharesshares
Disclosure of classes of share capital [abstract]
Dividend reinvestment plan | $ / shares		$ 21.09			$ 20.46				$ 20.27
Balance, shares at beginning of period	442,794,484	442,794,484	442,724,309	441,517,017	441,517,017	441,456,217	441,456,217	442,005,404	442,005,404
Share purchase options exercised | $ / shares	$ 24.28			$ 23.61		$ 25.65		$ 23.87
Restricted share units released | $ / shares		$ 0	$ 0				$ 0		$ 0
Share purchase options exercised	46,800	46,800		13,000	13,000	40,050	40,050	17,550	17,550
Restricted share units released	185	185	70,175			20,750	20,750	1,225	1,225
Dividend reinvestment plan	718,453	718,453		475,387	475,387			700,130	700,130
Balance, shares at end of period	443,559,922	443,559,922	442,794,484	442,005,404	442,005,404	441,517,017	441,517,017	442,724,309	442,724,309

Issued Capital - Summary of C96

Issued Capital - Summary of Common Shares Issued and Outstanding (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2018
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, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of Dividends [Line Items]
Dividends declared per share	$ 0.09		$ 0.07		$ 0.18		$ 0.14
Average number of shares eligible for dividend	443,197		441,798		442,996		441,658
Total dividends paid	$ 24,738	$ 39,852	$ 21,202	$ 30,906	$ 838,000	$ 69,825
Shares issued under the DRIP	347,461		207,405		718,453		$ 475,387
Retained Earnings [member]
Disclosure of Dividends [Line Items]
Total dividends paid	39,888	$ 39,852	30,926	$ 30,906	79,739	$ 84,015	61,832
Dividends Paid in Cash [member]
Disclosure of Dividends [Line Items]
Total dividends paid	32,475		26,818		64,579		52,101
Dividends Paid in DRIP [member]
Disclosure of Dividends [Line Items]
Total dividends paid	$ 7,413		$ 4,108		$ 15,160		$ 9,731

Issued Capital - Schedule of 98

Issued Capital - Schedule of Dividends Declared (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017
Disclosure of dividend [Abstract]
Dividend declared	$ 24,738	$ 39,852	$ 21,202	$ 30,906	$ 838,000	$ 69,825
Dividend reinvested discount rate					3.00%

Reserves - Summary of Reserves

Reserves - Summary of Reserves (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Reserves
Share purchase warrants	$ 83,077	$ 83,077
Share purchase options	29,836	28,799
Restricted share units	5,109	5,177
Long-term investment revaluation reserve, net of tax	(30,203)	(40,047)
Total reserves	$ 87,819	$ 77,007

Reserves - Summary of Share Pur

Reserves - Summary of Share Purchase Warrants (Detail) $ / shares in Units, $ in Thousands	Jun. 30, 2018USD ($)Exchange_Ratio$ / sharesshares	Dec. 31, 2017USD ($)
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, 2018CAD ($)sharesOption$ / shares	Jun. 30, 2017CAD ($)sharesOption$ / shares	Jun. 30, 2018USD ($)shares	Jun. 30, 2018CAD ($)Option$ / sharesshares	Jun. 30, 2017USD ($)shares	Jun. 30, 2017CAD ($)Option$ / sharesshares	Mar. 31, 2018CAD ($)	Dec. 31, 2017CAD ($)	Mar. 31, 2017CAD ($)	Dec. 31, 2016CAD ($)
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.
Share purchase options outstanding	3,887,850	4,254,870		3,887,850		4,254,870	3,948,590	4,232,260	4,507,450	4,097,400
Options outstanding weighted average exercise price	$ 25.58	$ 26.89		$ 25.58		$ 26.89	$ 25.50	$ 26.71	$ 27.32	$ 27.36
Stock Options [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Maximum term of share purchase option			Ten years
Vesting period			Two years
Trailing period for expected volatility			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.
Share purchase options outstanding | Option	3,887,850	4,254,870		3,887,850		4,254,870
Options outstanding weighted average exercise price	$ 25.58	$ 26.89		$ 25.58		$ 26.89
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
RSU [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of RSU issued | shares	790	370	161,060		140,780
Weighted average fair value per RSU granted | $ / shares	$ 27.96	$ 27.60		$ 26.25		$ 27.51
Fair value of RSUs issued during the year			$ 3		$ 3
RSUs outstanding at reporting date | shares	403,951	311,411		403,951		311,411

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, 2018USD ($)yrshares	Jun. 30, 2018CAD ($)yr$ / sharesshares	Mar. 31, 2018USD ($)	Mar. 31, 2018$ / shares	Jun. 30, 2017USD ($)yrshares	Jun. 30, 2017CAD ($)yr$ / sharesshares	Mar. 31, 2017USD ($)	Mar. 31, 2017$ / shares	Jun. 30, 2018USD ($)yrshares	Jun. 30, 2018CAD ($)yr$ / sharesshares	Dec. 31, 2017$ / shares	Jun. 30, 2017USD ($)yrshares	Jun. 30, 2017CAD ($)yr$ / sharesshares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value per option granted | $ / shares		$ 5.83		$ 5.49		$ 5.68		$ 5.87			$ 5.53
Total fair value of options issued			$ 2,000				$ 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		$ 27.96				$ 27.60				$ 26.25			$ 27.51
Expected dividend yield	1.65%	1.65%			1.21%	1.21%			1.73%	1.73%		1.14%	1.14%
Expected volatility	35.00%	35.00%			35.00%	35.00%			35.00%	35.00%		36.00%	36.00%
Risk-free interest rate	2.37%	2.37%			0.73%	0.73%			1.91%	1.91%		0.92%	0.92%
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		$ 6				$ 5.68				$ 5.49			$ 5.87
Number of options issued during the period | shares	3,880	3,880			1,820	1,820			549,210	549,210		486,920	486,920
Total fair value of options issued	$ 18				$ 8				$ 2,347			$ 2,143

Reserves - Disclosure of Share

Reserves - Disclosure of Share Purchase Options Reserve (Detail) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2017
Disclosure Of Share Purchase Options Reserve [Line Items]
Beginning balance			$ 28,799
Recognition of fair value of RSUs issued	[1]	$ 1,394	1,249	$ 1,273	$ 1,196	$ 2,582
Share purchase options exercised	[1]	(878)		(225)	(776)	(329)
Ending balance		29,836				28,799
Share Purchase Options Reserve [member]
Disclosure Of Share Purchase Options Reserve [Line Items]
Beginning balance		29,450	28,799	26,853	26,063	27,489
Recognition of fair value of RSUs issued		584	651	680	982	1,375
Share purchase options exercised		(198)		(44)	(192)	(65)
Ending balance		$ 29,836	$ 29,450	$ 27,489	$ 26,853	$ 28,799
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

Reserves - Disclosure of Outsta

Reserves - Disclosure of Outstanding Share Purchase Options (Detail)	3 Months Ended				6 Months Ended
	Jun. 30, 2018CAD ($)	Mar. 31, 2018CAD ($)	Jun. 30, 2017CAD ($)	Mar. 31, 2017CAD ($)	Dec. 31, 2017CAD ($)
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Weighted Average Exercise Price, Beginning balance	$ 25.50	$ 26.71	$ 27.32	$ 27.36	$ 26.89
Weighted Average Exercise Price, Granted	27.96	26.24	27.60	27.51	24.11
Weighted Average Exercise Price, Exercised	24.28		23.61	25.65	23.87
Weighted Average Exercise Price, Expired	30.19	32.75	34.81	32.40	36.90
Weighted Average Exercise Price, Forfeited	26.98				27.51
Weighted Average Exercise Price, Ending balance	$ 25.58	$ 25.50	$ 26.89	$ 27.32	$ 26.71
Number of Options Outstanding, Beginning balance	3,948,590	4,232,260	4,507,450	4,097,400	4,254,870
Number of Options Outstanding, Granted	3,880	545,330	1,820	485,100	21,440
Number of Options Outstanding, Exercised	(46,800)		(13,000)	(40,050)	(17,550)
Number of Options Outstanding, Expired	(15,000)	(829,000)	(241,400)	(35,000)	(20,000)
Number of Options Outstanding, Forfeited	(2,820)				(6,500)
Number of Options Outstanding, Ending balance	3,887,850	3,948,590	4,254,870	4,507,450	4,232,260

Reserves - Disclosure of Out105

Reserves - Disclosure of Outstanding Share Purchase Options (Parenthetical) (Detail) $ in Millions	3 Months Ended						6 Months Ended
	Jun. 30, 2018$ / shares	Mar. 31, 2018USD ($)	Mar. 31, 2018$ / shares	Jun. 30, 2017$ / shares	Mar. 31, 2017USD ($)	Mar. 31, 2017$ / shares	Dec. 31, 2017$ / shares
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Fair value per option granted | $ / shares	$ 5.83		$ 5.49	$ 5.68		$ 5.87	$ 5.53
Fair value of options issued during the year | $		$ 2			$ 2

Reserves - Disclosure of Restri

Reserves - Disclosure of Restricted Share Units Reserve (Detail) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2017
Disclosure of restricted share units reserve [line items]
Recognition of fair value of RSUs issued	[1]	$ 1,394	$ 1,249	$ 1,273	$ 1,196	$ 2,582
RSU [member]
Disclosure of restricted share units reserve [line items]
Restricted Share Units Reserve, Beginning Balance		4,303	5,178	3,400	3,669	3,993
Recognition of fair value of RSUs issued		810	598	593	214	1,207
Restricted share units released		(4)	(1,473)		(483)	(22)
Restricted Share Units Reserve, Ending balance		$ 5,109	$ 4,303	$ 3,993	$ 3,400	$ 5,178
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

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, 2018		Mar. 31, 2018		Jun. 30, 2017		Mar. 31, 2017		Jun. 30, 2018	Dec. 31, 2017		Jun. 30, 2017
Disclosure Of Long Term Investment Revaluation Reserve [Line Items]
Unrealized gain (loss) on LTIs	$ 13,430	[1]	$ (3,586)	[1]	$ 6,753	[1]	$ 3,828	[1]	$ 9,843	$ 6,880	[1]	$ 10,581
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	(43,633)		(40,047)		(53,680)		(57,508)		(40,047)	(46,927)		(57,508)
Unrealized gain (loss) on LTIs	13,430		(3,586)		6,753		3,828			6,880
Long-term investment revaluation reserve at end of period	(30,203)		(43,633)		(46,927)		(53,680)		(30,203)	(40,047)		(46,927)
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	(41,239)		(38,111)		(53,099)		(56,662)		(38,111)	(45,624)		(56,662)
Unrealized gain (loss) on LTIs	16,663		(3,128)		7,475		3,563			7,513
Long-term investment revaluation reserve at end of period	(24,576)		(41,239)		(45,624)		(53,099)		(24,576)	(38,111)		(45,624)
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	(2,394)		(1,936)		(581)		(846)		(1,936)	(1,303)		(846)
Unrealized gain (loss) on LTIs	(3,233)		(458)		(722)		265			(633)
Long-term investment revaluation reserve at end of period	$ (5,627)		$ (2,394)		$ (1,303)		$ (581)		$ (5,627)	$ (1,936)		$ (1,303)
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "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, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of information relative to Performance Share Units [line items]
Number of performance share units granted	1,590	218,670	730	196,160		10,330
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	1,590		730		220,260		196,890
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) - PSU	3 Months Ended				6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure Of Other Equity Instruments - Performance Share Units [abstract]
Beginning balance	653,606	656,599	641,914	717,564	656,599	646,648	717,564
Granted	1,590	218,670	730	196,160		10,330
Dividend equivalent participation			4,004			6,300
Paid		(221,663)		(271,810)		(3,629)
Forfeited	(2,517)					(3,050)
Ending balance	652,679	653,606	646,648	641,914	652,679	656,599	646,648

Stock Based Compensation - S110

Stock Based Compensation - Schedule of the Company's Outstanding PSUs (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2018
Performance share units (PSUs) [member]
Disclosure of other equity instruments [Line Items]
Actual performance factor achieved during completed performance period	0.00%

Earnings per Share ("EPS") a111

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings per share [line items]
Basic weighted average number of shares outstanding	443,191	441,784	442,961	441,635
Diluted weighted average number of shares outstanding	443,770	442,370	443,453	442,168
Share purchase options [member]
Earnings per share [line items]
Restricted share units	175	275	131	277
Restricted stock units [member]
Earnings per share [line items]
Restricted share units	404	311	361	256

Earnings per Share ("EPS") a112

Earnings per Share ("EPS") and Diluted Earnings per Share ("Diluted EPS") - Additional Information (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings per share [abstract]
Average market value of common shares	$ 26.46	$ 27.46	$ 26.01	$ 27.48

Earnings per Share ("EPS") a113

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings per share [line items]
Share options not included in calculation of diluted earnings per share	10,827	11,392	11,983	11,392
Share purchase options [member]
Earnings per share [line items]
Share options not included in calculation of diluted earnings per share	827	1,392	1,983	1,392
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 Infor114

Supplemental Cash Flow Information - Summary of Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Change in non-cash working capital
Accounts receivable	$ (4,682)	$ (510)	$ (3,831)	$ (1,459)
Accounts payable and accrued liabilities	4,975	(2,119)	817	(6,701)
Other	(2,084)	(837)	(1,880)	(769)
Total change in non-cash working capital	$ (1,791)	$ (3,466)	$ (4,894)	$ (8,929)

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Tax Recognized in Net Earnings (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Major components of tax expense (income) [abstract]
Current income tax expense related to foreign jurisdictions	$ 29	$ 264	$ 51	$ 277
Origination and reversal of temporary differences	845	810	1,891	1,577
Reversal of a write down of previously recognized temporary differences	(4,098)	(1,630)	(5,651)	(2,282)
Total deferred income tax expense (recovery)	(3,253)	(820)	(3,760)	(705)	$ (1,212)
Income tax expense (recovery)	$ (3,224)	$ (556)	$ (3,709)	$ (428)

Income Taxes - Schedule of I116

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income tax relating to components of other comprehensive income [abstract]
Deferred income tax expense (recovery) related to LTIs - common shares held	$ 3,233	$ 722	$ 3,691	$ 457
Deferred income tax expense (recovery) recognized in OCI	$ 3,233	$ 722	$ 3,691	$ 457	$ 1,091

Income Taxes - Schedule of I117

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, 2018

Mar. 31, 2018

[1]

Jun. 30, 2017

Mar. 31, 2017

[1]

Jun. 30, 2018

Dec. 31, 2017

[1]

Jun. 30, 2017

Dec. 31, 2017

Current and deferred tax relating to items charged or credited directly to equity [line items]

Deferred income tax expense (recovery) recognized in equity

$ 30

[1]

$ 59

$ (113)

[1]

$ 152

$ 89

$ (104)

$ 39

$ (65)

Write-down of previously recognized temporary differences [member]

Current and deferred tax relating to items charged or credited directly to equity [line items]

Deferred income tax expense (recovery) recognized in equity

$ 30

$ (113)

$ 89

$ 39

[1]

Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

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, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Earnings before income taxes	$ 314,918	$ 67,056	$ 382,556	$ 128,408
Canadian federal and provincial income tax rates	27.00%	26.00%	27.00%	26.00%
Income tax expense based on above rates	$ 85,028	$ 17,434	$ 103,290	$ 33,386
Non-deductible stock based compensation and other	1,128	627	1,915	1,118
Differences in tax rates in foreign jurisdictions	(86,764)	(17,907)	(106,925)	(34,979)
Current period unrecognized temporary differences	1,482	920	3,662	2,329
Write down (reversal of write down) of previously recognized temporary differences	(4,098)	(1,630)	(5,651)	(2,282)
Income tax expense (recovery)	$ (3,224)	$ (556)	$ (3,709)	$ (428)

Income Taxes - Schedule of P119

Income Taxes - Schedule of Provision for Income Taxes (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2018
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
BC corporate tax rate in 2017	11.00%
BC corporate tax rate starting in 2018	12.00%
Combined statutory tax rate for years 2018 and beyond	27.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2018
Income Taxes [Abstract]
Name of subsidiary	Wheaton Precious Metals International Ltd.
Proportion of ownership interest in subsidiary	100.00%

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, 2018		Mar. 31, 2018		Jun. 30, 2017		Mar. 31, 2017		Jun. 30, 2018	Dec. 31, 2017		Jun. 30, 2017	Dec. 31, 2017
Deferred Tax Assets And Liabilities [line items]
Opening Balance			$ (76)				$ (262)		$ (76)			$ (262)	$ (262)
Recovery (Expense) Recognized In Net Earnings	$ 3,253				$ 820				3,760			705	1,212
Recovery (Expense) Recognized In OCI	(3,233)				(722)				(3,691)			(457)	(1,091)
Recovery (Expense) Recognized In Shareholders' Equity	(30)	[1]	(59)	[1]	$ 113	[1]	(152)	[1]	(89)	$ 104	[1]	(39)	65
Closing Balance	(96)								(96)	(76)			(76)
Non-capital losses [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			3,848				3,508		3,848			3,508	3,508
Recovery (Expense) Recognized In Net Earnings									64				299
Recovery (Expense) Recognized In Shareholders' Equity									9				41
Closing Balance	3,921								3,921	3,848			3,848
Capital losses [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			1,965				846		1,965			846	846
Recovery (Expense) Recognized In Net Earnings									3,662				1,119
Closing Balance	5,627								5,627	1,965			1,965
Deferred tax assets other [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			147				43		147			43	43
Recovery (Expense) Recognized In Net Earnings									132				104
Closing Balance	279								279	147			147
Interest capitalized for accounting [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(87)				(84)		(87)			(84)	(84)
Recovery (Expense) Recognized In Net Earnings													(3)
Closing Balance	(87)								(87)	(87)			(87)
Financing fees [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(375)				173		(375)			173	173
Recovery (Expense) Recognized In Net Earnings									(107)				(572)
Recovery (Expense) Recognized In Shareholders' Equity									(98)				24
Closing Balance	(580)								(580)	(375)			(375)
Convertible note receivables [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(29)						(29)
Recovery (Expense) Recognized In Net Earnings									29				(29)
Closing Balance										(29)			(29)
Long-term investment [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(1,937)				(846)		(1,937)			(846)	(846)
Recovery (Expense) Recognized In OCI									(3,691)				(1,091)
Closing Balance	(5,628)								(5,628)	(1,937)			(1,937)
Mineral stream interest [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			(3,532)				(3,640)		(3,532)			(3,640)	(3,640)
Recovery (Expense) Recognized In Net Earnings													108
Closing Balance	(3,532)								(3,532)	(3,532)			(3,532)
Deferred tax liabilities others [member]
Deferred Tax Assets And Liabilities [line items]
Opening Balance			$ (76)				$ (262)		(76)			$ (262)	(262)
Recovery (Expense) Recognized In Net Earnings									(20)				186
Closing Balance	$ (96)								$ (96)	$ (76)			$ (76)
[1]	Definitions as follows: "OCI" = Other Comprehensive Income (Loss); "SBC" = Equity Settled Stock Based Compensation; "Options" = Share Purchase Options; "RSUs" = Restricted Share Units; "DIT" = Deferred Income Taxes; "LTI's" = Long-Term Investments; "Warrants" = Share Purchase Warrants.

Income Taxes -Schedule of Defer

Income Taxes -Schedule of Deferred Income Tax Assets Unrecognized (Detail) - Canada [member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Unrecognized deferred tax assets [line items]
Deferred tax assets	$ 129,867	$ 129,903
Non-capital losses [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	36,309	32,388
Financing fees [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	6,058	7,451
Mineral stream interest [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	68,834	70,514
Deferred tax assets other [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	2,017	1,366
Capital losses [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	6,694	10,356
Convertible note receivable [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	248
Unrealized losses on long term investments [member]
Unrecognized deferred tax assets [line items]
Deferred tax assets	$ 9,707	$ 7,828

Commitments and Contingencies -

Commitments and Contingencies - Summary of Commitments to Purchase Mineral Stream (Detail)	6 Months Ended
	Jun. 30, 2018USD ($)
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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	8.85
Yauliyacu [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Yauliyacu [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
San Dimas [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	600
San Dimas [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	variable
Percentage of production to be purchased	33.75%
Antamina [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Antamina [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | 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] | 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] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Stillwater [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	variable
Percentage of production to be purchased	100.00%
Stillwater [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Voisey's Bay [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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	variable
Percentage of production to be purchased	42.40%
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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	6.77
Stratoni [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Stratoni [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	n/a
Percentage of production to be purchased	0.00%
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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	25.00%
Per Unit of Measurement Cash Payment	4.17
Penasquito [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Penasquito [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
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	400
Salobo [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
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] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	n/a
Percentage of production to be purchased	0.00%
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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.34
Los Filos [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Los Filos [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.34
Zinkgruvan [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Zinkgruvan [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.18
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	322
Minto [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased	100.00%
Per Unit of Measurement Cash Payment	4.26
Neves-Corvo [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Neves-Corvo [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	variable
Percentage of production to be purchased	100.00%
Aljustrel [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Aljustrel [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	variable
Percentage of production to be purchased	25.00%
Keno Hill [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Keno Hill [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | 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] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Pascua-Lama [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | 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] | 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] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | 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] | 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] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | 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] | 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] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | 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] | 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] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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] | Silver [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	variable
Percentage of production to be purchased	100.00%
Kutcho [member] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	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	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] | 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] | Gold [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	n/a
Percentage of production to be purchased	0.00%
Loma de La Plata [member] | Palladium [member]
Disclosure of contractual obligations and commitments [line items]
Per Unit of Measurement Cash Payment	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	n/a
Percentage of production to be purchased	0.00%

Commitments and Contingencie124

Commitments and Contingencies - Summary of Commitments to Purchase Mineral Stream (Parenthetical) (Detail) lb in Millions	Jul. 16, 2018USD ($)	Jul. 01, 2018	Jun. 30, 2018USD ($)$ / oz$ / ozt$ / lbozlb
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 | $ / ozt			20
Maximum market price of silver on a per ounce basis before top up payment is capped | $ / oz			40
San Dimas [member] | Gold interests [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.
Antamina [member] | Silver interests [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
Minto [member] | Gold interests [member]
Disclosure of contractual obligations and commitments [line items]
Minimum market price of copper before Minto top up payment is required | $ / lb			2.5
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%
Silver [member] | Yauliyacu [member]
Disclosure of contractual obligations and commitments [line items]
Price floor on a per ounce basis | $ / oz			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 | $ / oz			20
Per Ounce Cash Payment			8.85
Maximum top up payment | $ / oz			10
Price cap on a per ounce basis | $ / oz			18.85
Silver [member] | San Dimas [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			0.00%
Silver [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			33.75%
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] | Constancia and 777 [member]
Disclosure of contractual obligations and commitments [line items]
Price per ounce after the initial 40 year term | $ / oz			9.9
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] | Stratoni [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			100.00%
Per Ounce Cash Payment			6.77
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			2.50
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		10,000
Silver [member] | Minto [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			100.00%
Per Ounce Cash Payment			4.18
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%
Period that payable rates are fixed			2 years
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
Gold [member] | Yauliyacu [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]
Percentage of production to be purchased			50.00%
Per Ounce Cash Payment			600
Gold [member] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			0.00%
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 [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			50.00%
Fixed rate gold recoveries			55.00%
Per Ounce Cash Payment			400
Gold [member] | Constancia and 777 [member]
Disclosure of contractual obligations and commitments [line items]
Price per ounce after the initial 40 year term | $ / oz			550
Gold [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			100.00%
Gold [member] | Voisey's Bay [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			0.00%
Gold [member] | Stratoni [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			322
Gold [member] | Aljustrel [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			0.00%
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] | Acquisition of New Precious Metal Purchase Agreement [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production	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%
Palladium [member] | Yauliyacu [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] | Antamina [member]
Disclosure of contractual obligations and commitments [line items]
Percentage of production to be purchased			0.00%
Palladium [member] | Constancia [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%
Palladium [member] | Voisey's Bay [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] | Minto [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] | 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%
Palladium [member] | Acquisition of New Precious Metal Purchase Agreement [member] | Stillwater [member]
Disclosure of contractual obligations and commitments [line items]
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%
Cobalt [member] | Yauliyacu [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] | Antamina [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] | 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] | Stratoni [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] | Aljustrel [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 Contingencie125

Commitments and Contingencies - Summary of Other Contractual Obligations and Contingencies (Detail) $ in Thousands	Jun. 30, 2018USD ($)
Disclosure of contractual obligations [line items]
Total contractual obligations	$ 2,250,189
Bank debt [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	956,500
Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	187,617
Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	6,772
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	133,750
Kutcho [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	61,500
Stillwater [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	502,500
2018 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	524,942
2018 [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	17,558
2018 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	634
2018 [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	750
2018 [member] | Kutcho [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	3,500
2018 [member] | Stillwater [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	502,500
2019 - 2021 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	130,355
2019 - 2021 [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	122,593
2019 - 2021 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	3,262
2019 - 2021 [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	4,500
2022 - 2023 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,008,194
2022 - 2023 [member] | Bank debt [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	956,500
2022 - 2023 [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	47,466
2022 - 2023 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,728
2022 - 2023 [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	2,500
After 2023 [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,148
After 2023 [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,148
Sub-Total [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	1,664,639
Sub-Total [member] | Bank debt [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	956,500
Sub-Total [member] | Interest expense [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	187,617
Sub-Total [member] | Operating leases [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	6,772
Sub-Total [member] | Cotabambas [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	7,750
Sub-Total [member] | Kutcho [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	3,500
Sub-Total [member] | Stillwater [member] | Mineral stream interest payments [member]
Disclosure of contractual obligations [line items]
Total contractual obligations	502,500
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 Contingencie126

Commitments and Contingencies - Summary of Other Contractual Obligations and Contingencies (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Disclosure of contractual obligations [line items]
Outstanding on the Revolving Facility	$ 956,500	$ 770,000
2018 [member] | Stillwater [member]
Disclosure of contractual obligations [line items]
Contingent transaction costs	3,000
2022 - 2023 [member] | Bank debt [member]
Disclosure of contractual obligations [line items]
Outstanding on the Revolving Facility	957,000
No scheduled due date [member] | Rosemont [member]
Disclosure of contractual obligations [line items]
Contingent transaction costs	$ 1,000

Commitments and Contingencie127

Commitments and Contingencies - Additional Information (Detail) Tonnes_Per_Day in Millions, $ in Millions	Jul. 25, 2018USD ($)	Mar. 15, 2016USD ($)	Sep. 24, 2015USD ($)	Sep. 24, 2015CAD ($)	Jun. 30, 2018USD ($)MillionTonnesPerAnnumTonnes_Per_Day	Jun. 30, 2018CAD ($)MillionTonnesPerAnnumTonnes_Per_Day	Mar. 15, 2018USD ($)	Mar. 15, 2018CAD ($)	Mar. 15, 2017USD ($)	Mar. 15, 2017CAD ($)	Mar. 15, 2016CAD ($)
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid					$ 333,250,000
Upfront cash consideration paid to date					$ 25,250,000
Notice objection filing period					90 days	90 days
Reassessment interest and penalties					$ 700,000	$ 0.9
Percentage of reassessments interest and penalties					50.00%	50.00%
Canada [member]
Disclosure of contingent liabilities [line items]
Total reassessment			$ 268,000,000	$ 353
Relevant years			2005-2010 taxation years	2005-2010 taxation years
Percentage of assessment required to be deposited		50.00%
Letter of guarantee amount provided to CRA		$ 146,000,000									$ 192
Additional letter of guarantee amount provided to CRA							$ 8,000,000	$ 11	$ 8,000,000	$ 10
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					3,500,000
Unpaid upfront cash consideration with scheduled payment dates					3,500,000
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	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.	If processing throughput is increased to 4,500 tonnes per day or more within 5 years of attaining commercial production.
Rosemont [member]
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid					$ 230,000,000
Loma de La Plata [member]
Disclosure of contingent liabilities [line items]
Upfront cash consideration to be paid					32,000,000
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]
Total upfront cash payment for early deposit silver streaming interest					140,000,000
Upfront cash consideration paid to date					6,000,000
Unpaid upfront cash consideration with scheduled payment dates					8,000,000
Cash not returned on discontinuing precious metal purchase agreement					$ 2,000,000
Option repurchase precious metal stream, percentage					50.00%	50.00%
Salobo [member]
Disclosure of contingent liabilities [line items]
Mill throughput capacity | MillionTonnesPerAnnum					24	24
Salobo [member] | Bottom of range [member]
Disclosure of contingent liabilities [line items]
Expanded Mill throughput capacity | MillionTonnesPerAnnum					28	28
Additional payment					$ 113,000,000
Salobo [member] | Top of range [member]
Disclosure of contingent liabilities [line items]
Expanded Mill throughput capacity | MillionTonnesPerAnnum					40	40
Additional payment					$ 953,000,000
Stillwater [member] | Acquisition of New Precious Metal Purchase Agreement [member]
Disclosure of contingent liabilities [line items]
Upfront cash consideration paid to date	$ 500,000,000
Upfront cash consideration to be paid with scheduled payment date	$ 500,000,000

Commitments and Contingencie128

Commitments and Contingencies - Summary of current status of CRA (Detail) - Canada Revenue Agency [member]	6 Months Ended
	Jun. 30, 2018
2005-2010 Taxation Years [member]
Disclosure of contingent liabilities [line items]
CRA Position/Status	Transfer pricing provisions of the Act should apply such that Wheaton's income subject to tax in Canada should be increased by an amount equal to substantially all of the income earned outside of Canada by Wheaton's foreign subsidiaries.
Potential Income Inclusion	CRA has reassessed Wheaton and is seeking to increase Wheaton's income subject to tax in Canada by Cdn$715 million.
Potential Income Tax Payable	CRA has reassessed Wheaton and is seeking to impose income tax of $153 million (Cdn$201 million).
Payments Made	Wheaton has posted security in the form of letters of guarantee totaling $162 million (Cdn$213 million) reflecting 50% of all assessed tax, penalties and interest accrued to March 15, 2019.
Timing	An appeal in the Tax Court of Canada commenced January 8, 2016. Trial scheduled to commence mid-September 2019 for a two month period.
2011-2015 Taxation Years [member]
Disclosure of contingent liabilities [line items]
CRA Position/Status	CRA commenced an audit of 2011-2015 taxation years. CRA has not issued a proposal or reassessment.
Potential Income Inclusion	If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to increase Wheaton's income subject to tax in Canada by approximately $1.9 billion.
Potential Income Tax Payable	If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to impose income tax of approximately $384 million (Cdn$505 million).
Payments Made	N/A
Timing	Time to complete CRA audit unknown.
2016-2017 Taxation Years [member]
Disclosure of contingent liabilities [line items]
CRA Position/Status	Remains open to audit by CRA.
Potential Income Inclusion	If CRA were to audit and then reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to increase Wheaton's income subject to tax in Canada by approximately $580 million.
Potential Income Tax Payable	If CRA were to reassess on a similar basis as 2005-2010 taxation years, the Company estimates CRA would seek to impose income tax of approximately $149 million (Cdn$197 million).
Payments Made	N/A
Timing	N/A

Commitments and Contingencie129

Commitments and Contingencies - Summary of current status of CRA (Parenthetical) (Detail) - Canada Revenue Agency [member] $ in Millions, $ in Millions	24 Months Ended
	Dec. 31, 2012USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017CAD ($)	Sep. 24, 2015USD ($)	Sep. 24, 2015CAD ($)	Dec. 31, 2012CAD ($)	Dec. 31, 2011USD ($)
2005-2010 Taxation Years [member]
Disclosure of contingent liabilities [line items]
Transfer pricing penalties				$ 54	$ 72
Interest and other penalties				61	81
Total reassessment issued				$ 268	$ 353
Additional interest estimated		$ 34	$ 45
2011-2015 Taxation Years [member]
Disclosure of contingent liabilities [line items]
Transfer pricing penalties		187
Interest and other penalties		110	145
2011-2015 Taxation Years [member] | Precious Metal Acquired Under The PMPAs Is Equal To The Market Value Of Precious Metal While The Deposit Is Outstanding [member]
Disclosure of contingent liabilities [line items]
Estimate of potential amount of income inclusion		1,600
Estimated of potential amount of tax payable		331	435
Estimated of potential amount of transfer pricing penalties		161
Estimate of potential amount of interest payable		93	123
2016-2017 Taxation Years [member]
Disclosure of contingent liabilities [line items]
Transfer pricing penalties		58
Interest and other penalties		9	12
2016-2017 Taxation Years [member] | Precious Metal Acquired Under The PMPAs Is Equal To The Market Value Of Precious Metal While The Deposit Is Outstanding [member]
Disclosure of contingent liabilities [line items]
Estimate of potential amount of income inclusion		260
Estimated of potential amount of tax payable		68	89
Estimated of potential amount of transfer pricing penalties		26
Estimate of potential amount of interest payable		$ 4	$ 6
2011 Taxation Years [member]
Disclosure of contingent liabilities [line items]
Non capital losses reassessed							$ 12
2012 Taxation Years [member]
Disclosure of contingent liabilities [line items]
Non capital losses reassessed	$ 14
2011 and 2012 Taxation Years [member]
Disclosure of contingent liabilities [line items]
Additional tax and interest	$ 1.6					$ 5
Percentage Paid with respect to Interest and Other Penalties Assessed	50.00%

Segmented Information - Schedul

Segmented Information - Schedule of Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of operating segments [line items]
Sales	$ 212,400		$ 199,684		$ 411,652		$ 397,635
Cost of sales, excluding depletion	62,580		56,981		118,994		115,272
Depletion	62,494		59,772		119,759		123,715
Gross Margin	87,326		82,931		172,899		158,648
Gain on Disposal	245,715				245,715
Net earnings	318,142	$ 68,123	67,612	$ 61,224	386,265	$ (71,134)	128,836
Cash Flow From Operations	135,200		124,681		260,540		244,604
Total Assets	6,216,112		5,996,010		6,216,112	$ 5,683,313	5,996,010
General and administrative material reconciling items [member]
Disclosure of operating segments [line items]
Net earnings	(11,972)		(9,069)		(21,729)		(16,967)
Cash Flow From Operations	(7,627)		(6,869)		(17,497)		(17,344)
Interest expense material reconciling items [member]
Disclosure of operating segments [line items]
Net earnings	(5,659)		(6,482)		(11,249)		(12,854)
Cash Flow From Operations	(5,459)		(6,513)		(11,055)		(12,902)
Other material reconciling Items [member]
Disclosure of operating segments [line items]
Net earnings	(492)		(324)		(3,080)		(419)
Cash Flow From Operations	(1,493)		(190)		(2,436)		(680)
Income tax recovery material reconciling items [member]
Disclosure of operating segments [line items]
Net earnings	3,224		556		3,709		428
Aggregate material reconciling items [member]
Disclosure of operating segments [line items]
Net earnings	(14,899)		(15,319)		(32,349)		(29,812)
Cash Flow From Operations	(14,579)		(13,572)		(30,988)		(30,926)
Total Assets	430,317		205,388		430,317		205,388
Silver interests [member]
Disclosure of operating segments [line items]
Sales	98,647		108,814		204,813		199,978
Cost of sales, excluding depletion	27,107		(28,711)		55,606		(52,411)
Depletion	26,714		(31,153)		54,746		(56,816)
Gross Margin	44,826				94,461
Gain on Disposal	245,715				245,715
Net earnings	290,541		48,950		340,176		90,751
Cash Flow From Operations	71,397		75,738		149,058		145,135
Total Assets	1,894,655		2,374,248		1,894,655		2,374,248
Silver interests [member] | Penasquito [member]
Disclosure of operating segments [line items]
Sales	25,315		28,519		45,935		43,214
Cost of sales, excluding depletion	6,452		(6,769)		11,568		(10,320)
Depletion	4,572		(4,724)		8,198		(7,201)
Gross Margin	14,291				26,169
Net earnings	14,291		17,026		26,169		25,693
Cash Flow From Operations	18,863		21,750		34,367		32,894
Total Assets	395,052		410,876		395,052		410,876
Silver interests [member] | Constancia [member]
Disclosure of operating segments [line items]
Sales	6,826		9,659		16,406		16,346
Cost of sales, excluding depletion	2,418		(3,296)		5,807		(5,557)
Depletion	2,927		(4,113)		7,030		(6,935)
Gross Margin	1,481				3,569
Net earnings	1,481		2,250		3,569		3,854
Cash Flow From Operations	4,409		6,363		10,599		10,586
Total Assets	254,773		269,036		254,773		269,036
Silver interests [member] | Other silver interests [member]
Disclosure of operating segments [line items]
Sales	25,097		31,465		54,372		67,302
Cost of sales, excluding depletion	8,939		(9,942)		18,186		(20,378)
Depletion	5,279		(6,821)		11,284		(14,544)
Gross Margin	10,879				24,902
Net earnings	10,879		14,702		24,902		32,380
Cash Flow From Operations	16,014		21,216		36,037		44,695
Total Assets	511,851		766,091		511,851		766,091
Silver interests [member] | Antamina [member]
Disclosure of operating segments [line items]
Sales	23,736		24,873		47,506		44,851
Cost of sales, excluding depletion	4,676		(5,087)		9,496		(9,134)
Depletion	12,369		(14,257)		24,659		(25,734)
Gross Margin	6,691				13,351
Net earnings	6,691		5,529		13,351		9,983
Cash Flow From Operations	19,060		15,729		38,010		35,717
Total Assets	732,979		790,072		732,979		790,072
Silver interests [member] | San Dimas [member]
Disclosure of operating segments [line items]
Sales	17,673		14,298		40,594		28,265
Cost of sales, excluding depletion	4,622		(3,617)		10,549		(7,022)
Depletion	1,567		(1,238)		3,575		(2,402)
Gross Margin	11,484				26,470
Gain on Disposal	245,715				245,715
Net earnings	257,199		9,443		272,185		18,841
Cash Flow From Operations	13,051		10,680		30,045		21,243
Total Assets			138,173				138,173
Gold interests [member]
Disclosure of operating segments [line items]
Sales	113,753		90,870		206,839		197,657
Cost of sales, excluding depletion	35,473		(28,270)		63,388		(62,861)
Depletion	35,780		(28,619)		65,013		(66,899)
Gross Margin	42,500				78,438
Net earnings	42,500		33,981		78,438		67,897
Cash Flow From Operations	78,382		62,515		142,470		130,395
Total Assets	3,497,813		3,416,374		3,497,813		3,416,374
Gold interests [member] | Constancia [member]
Disclosure of operating segments [line items]
Sales	2,857		2,949		7,168		5,756
Cost of sales, excluding depletion	869		(942)		2,168		(1,869)
Depletion	812		(964)		2,026		(1,912)
Gross Margin	1,176				2,974
Net earnings	1,176		1,043		2,974		1,975
Cash Flow From Operations	1,989		2,007		5,001		3,874
Total Assets	120,025		123,758		120,025		123,758
Gold interests [member] | Sudbury [member]
Disclosure of operating segments [line items]
Sales	5,778		7,264		12,679		15,637
Cost of sales, excluding depletion	1,760		(2,329)		3,834		(5,083)
Depletion	3,498		(4,480)		7,622		(9,778)
Gross Margin	520				1,223
Net earnings	520		455		1,223		776
Cash Flow From Operations	4,020		4,930		8,968		10,523
Total Assets	372,366		391,757		372,366		391,757
Gold interests [member] | Salobo [member]
Disclosure of operating segments [line items]
Sales	92,327		63,577		165,162		140,206
Cost of sales, excluding depletion	28,294		(20,191)		50,152		(45,394)
Depletion	27,316		(19,223)		48,418		(43,216)
Gross Margin	36,717				66,592
Net earnings	36,717		24,163		66,592		51,596
Cash Flow From Operations	64,033		43,386		115,010		94,812
Total Assets	2,760,314		2,861,619		2,760,314		2,861,619
Gold interests [member] | Other gold interests [member]
Disclosure of operating segments [line items]
Sales	8,058		17,080		17,097		36,058
Cost of sales, excluding depletion	2,307		(4,808)		4,991		(10,515)
Depletion	2,075		(3,952)		4,868		(11,993)
Gross Margin	3,676				7,238
Net earnings	3,676		8,320		7,238		13,550
Cash Flow From Operations	5,850		12,192		11,001		21,186
Total Assets	26,950		39,240		26,950		39,240
Gold interests [member] | San Dimas [member]
Disclosure of operating segments [line items]
Sales	4,733				4,733
Cost of sales, excluding depletion	2,243				2,243
Depletion	2,079				2,079
Gross Margin	411				411
Net earnings	411				411
Cash Flow From Operations	2,490				2,490
Total Assets	218,158				218,158
Cobalt Interests [member] | Voisey's Bay [member]
Disclosure of operating segments [line items]
Total Assets	393,327				393,327
Mineral Stream Interests [member]
Disclosure of operating segments [line items]
Sales	212,400		199,684		411,652		397,635
Cost of sales, excluding depletion	62,580		(56,981)		118,994		(115,272)
Depletion	62,494		(59,772)		119,759		(123,715)
Gross Margin	87,326				172,899
Gain on Disposal	245,715				245,715
Net earnings	333,041		82,931		418,614		158,648
Cash Flow From Operations	149,779		138,253		291,528		275,530
Total Assets	$ 5,785,795		$ 5,790,622		$ 5,785,795		$ 5,790,622

Segmented Information - Sche131

Segmented Information - Schedule of Operating Segments (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Silver interests [member]
Disclosure of operating segments [line items]
Percentage of sales	10.00%	10.00%	10.00%	10.00%
Gold interests [member]
Disclosure of operating segments [line items]
Percentage of sales	10.00%	10.00%	10.00%	10.00%
Veladero and Lagunas Norte and Pierina [member] | Silver interests [member]
Disclosure of operating segments [line items]
Agreement Expiration Date	March 312,018	March 31, 2018	March 312,018	March 312,018

Segmented Information - Sche132

Segmented Information - Schedule of Company's Geographical Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Disclosure of geographical areas [line items]
Sales	$ 212,400	$ 199,684	$ 411,652	$ 397,635
Percentage of revenue derived from mineral stream interests located in geographic area	100.00%	100.00%	100.00%	100.00%
Mineral stream interest	$ 5,785,795	$ 5,790,622	$ 5,785,795	$ 5,790,622
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	$ 15,448	$ 27,106	$ 33,917	$ 57,519
Percentage of revenue derived from mineral stream interests located in geographic area	7.00%	14.00%	8.00%	15.00%
Mineral stream interest	$ 828,190	$ 469,772	$ 828,190	$ 469,772
Percentage of mineral stream interests located in geographic area	14.00%	8.00%	14.00%	8.00%
United States [member]
Disclosure of geographical areas [line items]
Percentage of revenue derived from mineral stream interests located in geographic area	0.00%	0.00%	0.00%	0.00%
Mineral stream interest	$ 433	$ 433	$ 433	$ 433
Percentage of mineral stream interests located in geographic area	0.00%	0.00%	0.00%	0.00%
Mexico [member]
Disclosure of geographical areas [line items]
Sales	$ 48,285	$ 45,195	$ 92,693	$ 78,828
Percentage of revenue derived from mineral stream interests located in geographic area	23.00%	23.00%	23.00%	20.00%
Mineral stream interest	$ 614,616	$ 550,809	$ 614,616	$ 550,809
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	$ 2,763	$ 2,021	$ 5,248	$ 5,445
Percentage of revenue derived from mineral stream interests located in geographic area	1.00%	1.00%	1.00%	1.00%
Mineral stream interest	$ 7,108	$ 11,347	$ 7,108	$ 11,347
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	$ 2,916	$ 1,918	$ 5,718	$ 4,659
Percentage of revenue derived from mineral stream interests located in geographic area	1.00%	1.00%	1.00%	1.00%
Mineral stream interest	$ 23,141	$ 24,135	$ 23,141	$ 24,135
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	$ 4,882	$ 6,750	$ 11,316	$ 12,340
Percentage of revenue derived from mineral stream interests located in geographic area	2.00%	3.00%	3.00%	3.00%
Mineral stream interest	$ 38,623	$ 41,064	$ 38,623	$ 41,064
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	$ 2,496	$ 4,419	$ 5,171
Percentage of revenue derived from mineral stream interests located in geographic area	2.00%	1.00%	1.00%	1.00%
Mineral stream interest	$ 264,411	$ 497,612	$ 264,411	$ 497,612
Percentage of mineral stream interests located in geographic area	5.00%	9.00%	5.00%	9.00%
Brazil [member]
Disclosure of geographical areas [line items]
Sales	$ 92,327	$ 63,577	$ 165,162	$ 140,206
Percentage of revenue derived from mineral stream interests located in geographic area	43.00%	32.00%	40.00%	35.00%
Mineral stream interest	$ 2,760,314	$ 2,861,619	$ 2,760,314	$ 2,861,619
Percentage of mineral stream interests located in geographic area	48.00%	49.00%	48.00%	49.00%
Peru [member]
Disclosure of geographical areas [line items]
Sales	$ 44,056	$ 50,621	$ 93,179	$ 93,467
Percentage of revenue derived from mineral stream interests located in geographic area	21.00%	25.00%	23.00%	24.00%
Mineral stream interest	$ 1,248,959	$ 1,333,831	$ 1,248,959	$ 1,333,831
Percentage of mineral stream interests located in geographic area	22.00%	23.00%	22.00%	23.00%
Silver interests [member]
Disclosure of geographical areas [line items]
Sales	$ 98,647	$ 108,814	$ 204,813	$ 199,978
Mineral stream interest	1,894,655	2,374,248	1,894,655	2,374,248	$ 2,080,688
Silver interests [member] | Canada [member]
Disclosure of geographical areas [line items]
Mineral stream interest	35,546	38,775	35,546	38,775
Silver interests [member] | United States [member]
Disclosure of geographical areas [line items]
Mineral stream interest	433	433	433	433
Silver interests [member] | Mexico [member]
Disclosure of geographical areas [line items]
Mineral stream interest	396,458	550,809	396,458	550,809
Silver interests [member] | Greece [member]
Disclosure of geographical areas [line items]
Mineral stream interest	7,108	11,347	7,108	11,347
Silver interests [member] | Portugal [member]
Disclosure of geographical areas [line items]
Mineral stream interest	23,141	24,135	23,141	24,135
Silver interests [member] | Sweden [member]
Disclosure of geographical areas [line items]
Mineral stream interest	38,623	41,064	38,623	41,064
Silver interests [member] | Argentina / Chile [member]
Disclosure of geographical areas [line items]
Mineral stream interest	264,411	497,612	264,411	497,612
Silver interests [member] | Peru [member]
Disclosure of geographical areas [line items]
Mineral stream interest	1,128,935	1,210,073	1,128,935	1,210,073
Gold interests [member]
Disclosure of geographical areas [line items]
Sales	113,753	90,870	206,839	197,657
Mineral stream interest	3,497,813	3,416,374	3,497,813	3,416,374	$ 3,342,589
Gold interests [member] | Canada [member]
Disclosure of geographical areas [line items]
Mineral stream interest	399,317	430,997	399,317	430,997
Gold interests [member] | Mexico [member]
Disclosure of geographical areas [line items]
Mineral stream interest	218,158		218,158
Gold interests [member] | Brazil [member]
Disclosure of geographical areas [line items]
Mineral stream interest	2,760,314	2,861,619	2,760,314	2,861,619
Gold interests [member] | Peru [member]
Disclosure of geographical areas [line items]
Mineral stream interest	120,024	$ 123,758	120,024	$ 123,758
Cobalt Interests [member]
Disclosure of geographical areas [line items]
Mineral stream interest	393,327		393,327
Cobalt Interests [member] | Canada [member]
Disclosure of geographical areas [line items]
Mineral stream interest	$ 393,327		$ 393,327

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Aug. 14, 2018	Jul. 17, 2018	Jul. 16, 2018	Jun. 30, 2018	Jul. 25, 2018	Dec. 31, 2017	Jun. 30, 2017
Disclosure of Events After Reporting Period [line items]
Dividend reinvested discount rate				3.00%
Upfront cash consideration paid				$ 25,250
Fair value				$ 261,159		$ 95,608	$ 80,595
Major Ordinary Share Transactions [member]
Disclosure of Events After Reporting Period [line items]
Dividend per share	$ 0.09
Dividend payable, date of record	Aug. 29, 2018
Dividend rate percentage	30.00%
Dividend reinvested discount rate	3.00%
Dividend payable date	Sep. 13, 2018
Stillwater [member] | Acquisition of New Precious Metal Purchase Agreement [member]
Disclosure of Events After Reporting Period [line items]
Upfront cash consideration paid					$ 500,000
Gold [member] | Stillwater [member] | Acquisition of New Precious Metal Purchase Agreement [member]
Disclosure of Events After Reporting Period [line items]
Fixed payable rate			99.00%
Percentage of production			100.00%
Per ounce cash payment as a percentage of the spot price of metal delivered			18.00%
Per ounce cash payment as a percentage of the spot price of metal delivered after upfront deposit reduced to NIL			22.00%
Palladium [member] | Stillwater [member] | Acquisition of New Precious Metal Purchase Agreement [member]
Disclosure of Events After Reporting Period [line items]
Fixed payable rate			99.60%
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 spot price of metal delivered			18.00%
Per ounce cash payment as a percentage of the spot price of metal delivered after upfront deposit reduced to NIL			22.00%
Adventus Zinc [member] | Acquisition of Long Term Investment in Common Shares [member]
Disclosure of Events After Reporting Period [line items]
Number of shares acquired		7,093,392
Fair value		$ 6,000
Percentage of issued and outstanding common shares		9.99%
Adventus Zinc [member] | Acquisition of first refusal on new streaming or royalty transactions on precious metals [Member]
Disclosure of Events After Reporting Period [line items]
Price paid for right of first refusal on new streaming agreements		$ 1,000