Accordion feature of the borrowings amount.

No definition available.

Name:	fnv_BorrowingsAccordionFeature
Namespace Prefix:	fnv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The credit spread adjustment of interest rate.

+ References

No definition available.

+ Details

Name:	fnv_BorrowingsCreditSpreadAdjustmentRate
Namespace Prefix:	fnv_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of interest capitalized during the period.

+ References

No definition available.

+ Details

Name:	fnv_IfrsInterestCostsCapitalized
Namespace Prefix:	fnv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facilities without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	fnv_IfrsLineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	fnv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facilities without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility and the nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

No definition available.

+ Details

Name:	fnv_LineOfCreditFacilityMaximumBorrowingCapacityAndNotionalAmount
Namespace Prefix:	fnv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of letter of credit.

+ References

No definition available.

+ Details

Name:	fnv_NumberOfLetterOfCredit
Namespace Prefix:	fnv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate number of letters of credit returned and cancelled during the period.

+ References

No definition available.

+ Details

Name:	fnv_NumberOfLetterOfCreditReturnedAndCancelled
Namespace Prefix:	fnv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The standby fee in percent.

+ References

No definition available.

+ Details

Name:	fnv_StandbyFeeInPercent
Namespace Prefix:	fnv_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow from borrowings obtained. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 17
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_17_c&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ifrs-full_BusinessCombinationsAxis=fnv_RoyaltyOnAnglogoldAshantiPlcSArthurGoldProjectInNevadaUSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=fnv_UnsecuredRevolvingTermCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=fnv_BorrowingsUnderCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=fnv_IfrsBaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=fnv_SecuredOvernightFinancingRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=fnv_IfrsPrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=fnv_CanadianOvernightRepoRateAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=fnv_IfrsLetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=fnv_SubsequentCancellationOfBorrowingsUnderCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Details) $ in Millions, $ in Millions			12 Months Ended
Debt (Details) $ in Millions, $ in Millions	Feb. 23, 2026 item	Jul. 22, 2025 USD ($)	Dec. 31, 2025 USD ($) item	Mar. 10, 2026 USD ($)	Dec. 31, 2025 CAD ($)
Revolving term credit facility
Drawdowns			$ 175.0
Arthur Gold Project Royalty
Revolving term credit facility
Interest incurred		$ 1.2	1.2
Credit Facility
Revolving term credit facility
Size of facility			1,000.0
Accordion feature			250.0
Drawdowns		$ 175.0	$ 0.0
Credit Facility \| Subsequent borrowings under credit facilities
Revolving term credit facility
Accordion feature				$ 500.0
Credit Facility \| Bottom of range
Revolving term credit facility
Standby fee (as a percent)			0.20%
Credit Facility \| Top of range
Revolving term credit facility
Standby fee (as a percent)			0.41%
Credit Facility \| CIBC \| Bottom of range
Revolving term credit facility
Spread on variable rate (as a percent)			0.00%		0.00%
Credit Facility \| CIBC \| Top of range
Revolving term credit facility
Spread on variable rate (as a percent)			1.05%		1.05%
Credit Facility \| SOFR \| Bottom of range
Revolving term credit facility
Spread on variable rate (as a percent)			1.10%		1.10%
Credit Facility \| SOFR \| Bottom of range \| Subsequent borrowings under credit facilities
Revolving term credit facility
Spread on variable rate (as a percent)				1.00%
Credit Facility \| SOFR \| Top of range
Revolving term credit facility
Spread on variable rate (as a percent)			2.15%		2.15%
Credit Facility \| SOFR \| Top of range \| Subsequent borrowings under credit facilities
Revolving term credit facility
Spread on variable rate (as a percent)				2.05%
Credit Facility \| Prime rate \| Bottom of range
Revolving term credit facility
Spread on variable rate (as a percent)			0.00%		0.00%
Credit Facility \| Prime rate \| Top of range
Revolving term credit facility
Spread on variable rate (as a percent)			1.05%		1.05%
Credit Facility \| CORRA \| Bottom of range
Revolving term credit facility
Spread on variable rate (as a percent)			1.00%		1.00%
Credit spread adjustment rate			0.29547%		0.29547%
Credit Facility \| CORRA \| Top of range
Revolving term credit facility
Spread on variable rate (as a percent)			2.05%		2.05%
Credit spread adjustment rate			0.32138%		0.32138%
Letter of credit
Revolving term credit facility
Number of letter of credit \| item			4
Maximum borrowing capacity			$ 48.1		$ 66.0
Letter of credit \| Subsequent cancellation of borrowings under credit facility
Revolving term credit facility
Number of letter of credit returned and cancelled \| item	4