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Income taxes - Noncapital Losses (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Non-capital loss carry-forwards |
Non-capital loss |
Amount | $ 17.0

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- Definition The amount of unused non-capital tax losses recognised and unrecognised. + References No definition available. + Details
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Namespace Prefix: | fnv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=fnv_NonCapitalLossCarryforwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |