Critical judgements in the application of accounting policies (Details)	Dec. 31, 2020
Blackwater
Disclosure of detailed information about financial instruments [line items]
Percentage of stream on gold production retained	8.00%

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.

Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration