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Shareholders' equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Shareholders' equity |  |
Dividends declared | $ 167.9 | $ 156.8
Dividend declared per share | $ 0.91 | $ 0.87
Cash dividends declared | $ 125.8 | $ 118.1
Share dividends paid - DRIP | $ 42.1 | $ 38.7

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- Definition The amount of cash dividends declared. + References No definition available. + Details
Name: | fnv_CashDividendsDeclared
Namespace Prefix: | fnv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of dividends declared. + References No definition available. + Details
Name: | fnv_DividendsDeclared
Namespace Prefix: | fnv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The value of share dividends issued from dividend reinvestment plan. + References No definition available. + Details
Name: | fnv_ValueOfSharesIssuedFromDividendReinvestmentPlan
Namespace Prefix: | fnv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | ifrs-full_DisclosureOfClassesOfShareCapitalAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount, per share, of dividends recognised as distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 107 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_107&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
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