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Adjustments for decrease (increase) in reinsurance contracts held to reconcile profit (loss) to net cash flow from (used in) operating activities.

No definition available.

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Adjustments for increase (decrease) in accounts payable and accrued liabilities

No definition available.

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The amount of adjustments for increase (decrease) in insurance contract liabilities.

No definition available.

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Adjustments For Increase (Decrease) In Insurance Contract Payables

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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No definition available.

Name:	ffh_ChangesinOperatingAssetsandLiabilitiesAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Interest Paid On Lease Liabilities

No definition available.

Name:	ffh_InterestPaidOnLeaseLiabilities
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Interest Received (Paid), Classified As Operating Activities

No definition available.

Name:	ffh_InterestReceivedPaidClassifiedAsOperatingActivities
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Balance Type:	debit
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No definition available.

Name:	ffh_NetInterestandDividendsReceivedAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

No definition available.

Name:	ffh_NetpurchasessalesofsecuritiesclassifiedasFVTPLAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
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Proceeds For (Purchases Of) Financial Assets At Fair Value Through Profit Or Loss

No definition available.

Name:	ffh_ProceedsForPurchasesOfFinancialAssetsAtFairValueThroughProfitOrLoss
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Proceeds From (Purchases Of) Common Equity Instruments Held

No definition available.

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Data Type:	xbrli:monetaryItemType
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Proceeds from (purchases of) derivative financial assets and other invested assets.

No definition available.

Name:	ffh_ProceedsFromPurchasesOfDerivativeFinancialAssetsAndOtherInvestmentAssets
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Proceeds From (Purchases Of) Preferred Equity Instruments Held

No definition available.

Name:	ffh_ProceedsFromPurchasesOfPreferredEquityInstrumentsHeld
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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The cash inflow (outflow) from the issuance (repurchases) of bonds.

No definition available.

Name:	ffh_ProceedsFromSalesRepurchasesOfBonds
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 20
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_20_a&doctype=Standard
-URIDate 2025-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
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Adjustments for increase (decrease) in other liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Other liabilities; Profit (loss)]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 20
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_20&doctype=Standard
-URIDate 2025-03-27

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The cash inflow (outflow) due to a decrease (increase) in restricted cash and cash equivalents. [Refer: Restricted cash and cash equivalents]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
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-Paragraph 16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_16&doctype=Standard
-URIDate 2025-03-27

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Data Type:	xbrli:monetaryItemType
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The cash inflow (outflow) due to a decrease (increase) in short-term deposits and investments.

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

The cash flows from income taxes paid or refunded.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 35
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_35&doctype=Standard
-URIDate 2025-03-27

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The increase (decrease) in working capital.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash outflow for interest paid, classified as operating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2025-01-01
-Paragraph 31
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2025-en-r&anchor=para_31&doctype=Standard
-URIDate 2025-03-27

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The cash inflow from interest received, classified as operating activities.