3.25.4 html 1981 772 1 true 518 0 false 15 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.fairfax.ca/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - Consolidated Balance Sheets Sheet http://www.fairfax.ca/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 00105 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.fairfax.ca/role/StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - Consolidated Statements of Earnings Sheet http://www.fairfax.ca/role/StatementConsolidatedStatementsOfEarnings Consolidated Statements of Earnings Statements 4 false false R5.htm 00300 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.fairfax.ca/role/StatementConsolidatedStatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 00400 - Statement - Consolidated Statements of Changes in Equity Sheet http://www.fairfax.ca/role/StatementConsolidatedStatementsOfChangesInEquity Consolidated Statements of Changes in Equity Statements 6 false false R7.htm 00405 - Statement - Consolidated Statements of Changes in Equity (Parenthetical) Sheet http://www.fairfax.ca/role/StatementConsolidatedStatementsOfChangesInEquityParenthetical Consolidated Statements of Changes in Equity (Parenthetical) Statements 7 false false R8.htm 00500 - Statement - Consolidated Statements of Cash Flows Sheet http://www.fairfax.ca/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 8 false false R9.htm 10101 - Disclosure - Business Operations Sheet http://www.fairfax.ca/role/DisclosureBusinessOperations Business Operations Notes 9 false false R10.htm 10201 - Disclosure - Basis of Presentation Sheet http://www.fairfax.ca/role/DisclosureBasisOfPresentation Basis of Presentation Notes 10 false false R11.htm 10301 - Disclosure - Summary of Material Accounting Policies Sheet http://www.fairfax.ca/role/DisclosureSummaryOfMaterialAccountingPolicies Summary of Material Accounting Policies Notes 11 false false R12.htm 10401 - Disclosure - Critical Accounting Estimates and Judgments Sheet http://www.fairfax.ca/role/DisclosureCriticalAccountingEstimatesAndJudgments Critical Accounting Estimates and Judgments Notes 12 false false R13.htm 10501 - Disclosure - Cash and Investments Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestments Cash and Investments Notes 13 false false R14.htm 10601 - Disclosure - Investments in Associates Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociates Investments in Associates Notes 14 false false R15.htm 10701 - Disclosure - Derivatives Sheet http://www.fairfax.ca/role/DisclosureDerivatives Derivatives Notes 15 false false R16.htm 10801 - Disclosure - Insurance Contract Liabilities Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilities Insurance Contract Liabilities Notes 16 false false R17.htm 10901 - Disclosure - Reinsurance Contract Assets Held Sheet http://www.fairfax.ca/role/DisclosureReinsuranceContractAssetsHeld Reinsurance Contract Assets Held Notes 17 false false R18.htm 11001 - Disclosure - Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held Sheet http://www.fairfax.ca/role/DisclosureNetFinanceIncomeOrExpenseFromInsuranceContractsAndReinsuranceContractAssetsHeld Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held Notes 18 false false R19.htm 11101 - Disclosure - Insurance Contract Receivables and Payables Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractReceivablesAndPayables Insurance Contract Receivables and Payables Notes 19 false false R20.htm 11201 - Disclosure - Goodwill and Intangible Assets Sheet http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssets Goodwill and Intangible Assets Notes 20 false false R21.htm 11301 - Disclosure - Other Assets Sheet http://www.fairfax.ca/role/DisclosureOtherAssets Other Assets Notes 21 false false R22.htm 11401 - Disclosure - Accounts Payable and Accrued Liabilities Sheet http://www.fairfax.ca/role/DisclosureAccountsPayableAndAccruedLiabilities Accounts Payable and Accrued Liabilities Notes 22 false false R23.htm 11501 - Disclosure - Borrowings Sheet http://www.fairfax.ca/role/DisclosureBorrowings Borrowings Notes 23 false false R24.htm 11601 - Disclosure - Total Equity Sheet http://www.fairfax.ca/role/DisclosureTotalEquity Total Equity Notes 24 false false R25.htm 11701 - Disclosure - Earnings per Share Sheet http://www.fairfax.ca/role/DisclosureEarningsPerShare Earnings per Share Notes 25 false false R26.htm 11801 - Disclosure - Income Taxes Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxes Income Taxes Notes 26 false false R27.htm 11901 - Disclosure - Statutory Requirements Sheet http://www.fairfax.ca/role/DisclosureStatutoryRequirements Statutory Requirements Notes 27 false false R28.htm 12001 - Disclosure - Contingencies and Commitments Sheet http://www.fairfax.ca/role/DisclosureContingenciesAndCommitments Contingencies and Commitments Notes 28 false false R29.htm 12101 - Disclosure - Acquisitions and Divestitures Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestitures Acquisitions and Divestitures Notes 29 false false R30.htm 12201 - Disclosure - Financial Risk Management Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagement Financial Risk Management Notes 30 false false R31.htm 12301 - Disclosure - Segmented Information Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformation Segmented Information Notes 31 false false R32.htm 12401 - Disclosure - Expenses Sheet http://www.fairfax.ca/role/DisclosureExpenses Expenses Notes 32 false false R33.htm 12501 - Disclosure - Supplementary Cash Flow Information Sheet http://www.fairfax.ca/role/DisclosureSupplementaryCashFlowInformation Supplementary Cash Flow Information Notes 33 false false R34.htm 12601 - Disclosure - Related Party Transactions Sheet http://www.fairfax.ca/role/DisclosureRelatedPartyTransactions Related Party Transactions Notes 34 false false R35.htm 12701 - Disclosure - Subsidiaries Sheet http://www.fairfax.ca/role/DisclosureSubsidiaries Subsidiaries Notes 35 false false R36.htm 20302 - Disclosure - Summary of Material Accounting Policies (Policies) Sheet http://www.fairfax.ca/role/DisclosureSummaryOfMaterialAccountingPoliciesPolicies Summary of Material Accounting Policies (Policies) Policies http://www.fairfax.ca/role/DisclosureSummaryOfMaterialAccountingPolicies 36 false false R37.htm 30503 - Disclosure - Cash and Investments (Tables) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsTables Cash and Investments (Tables) Tables http://www.fairfax.ca/role/DisclosureCashAndInvestments 37 false false R38.htm 30603 - Disclosure - Investments in Associates (Tables) Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociatesTables Investments in Associates (Tables) Tables http://www.fairfax.ca/role/DisclosureInvestmentsInAssociates 38 false false R39.htm 30703 - Disclosure - Derivatives (Tables) Sheet http://www.fairfax.ca/role/DisclosureDerivativesTables Derivatives (Tables) Tables http://www.fairfax.ca/role/DisclosureDerivatives 39 false false R40.htm 30803 - Disclosure - Insurance Contract Liabilities (Tables) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesTables Insurance Contract Liabilities (Tables) Tables http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilities 40 false false R41.htm 30903 - Disclosure - Reinsurance Contract Assets Held (Tables) Sheet http://www.fairfax.ca/role/DisclosureReinsuranceContractAssetsHeldTables Reinsurance Contract Assets Held (Tables) Tables http://www.fairfax.ca/role/DisclosureReinsuranceContractAssetsHeld 41 false false R42.htm 31003 - Disclosure - Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held (Tables) Sheet http://www.fairfax.ca/role/DisclosureNetFinanceIncomeOrExpenseFromInsuranceContractsAndReinsuranceContractAssetsHeldTables Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held (Tables) Tables http://www.fairfax.ca/role/DisclosureNetFinanceIncomeOrExpenseFromInsuranceContractsAndReinsuranceContractAssetsHeld 42 false false R43.htm 31103 - Disclosure - Insurance Contract Receivables and Payables (Tables) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractReceivablesAndPayablesTables Insurance Contract Receivables and Payables (Tables) Tables http://www.fairfax.ca/role/DisclosureInsuranceContractReceivablesAndPayables 43 false false R44.htm 31203 - Disclosure - Goodwill and Intangible Assets (Tables) Sheet http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssetsTables Goodwill and Intangible Assets (Tables) Tables http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssets 44 false false R45.htm 31303 - Disclosure - Other Assets (Tables) Sheet http://www.fairfax.ca/role/DisclosureOtherAssetsTables Other Assets (Tables) Tables http://www.fairfax.ca/role/DisclosureOtherAssets 45 false false R46.htm 31403 - Disclosure - Accounts Payable and Accrued Liabilities (Tables) Sheet http://www.fairfax.ca/role/DisclosureAccountsPayableAndAccruedLiabilitiesTables Accounts Payable and Accrued Liabilities (Tables) Tables http://www.fairfax.ca/role/DisclosureAccountsPayableAndAccruedLiabilities 46 false false R47.htm 31503 - Disclosure - Borrowings (Tables) Sheet http://www.fairfax.ca/role/DisclosureBorrowingsTables Borrowings (Tables) Tables http://www.fairfax.ca/role/DisclosureBorrowings 47 false false R48.htm 31603 - Disclosure - Total Equity (Tables) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityTables Total Equity (Tables) Tables http://www.fairfax.ca/role/DisclosureTotalEquity 48 false false R49.htm 31703 - Disclosure - Earnings per Share (Tables) Sheet http://www.fairfax.ca/role/DisclosureEarningsPerShareTables Earnings per Share (Tables) Tables http://www.fairfax.ca/role/DisclosureEarningsPerShare 49 false false R50.htm 31803 - Disclosure - Income Taxes (Tables) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.fairfax.ca/role/DisclosureIncomeTaxes 50 false false R51.htm 31903 - Disclosure - Statutory Requirements (Tables) Sheet http://www.fairfax.ca/role/DisclosureStatutoryRequirementsTables Statutory Requirements (Tables) Tables http://www.fairfax.ca/role/DisclosureStatutoryRequirements 51 false false R52.htm 32103 - Disclosure - Acquisitions and Divestitures (Tables) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresTables Acquisitions and Divestitures (Tables) Tables http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestitures 52 false false R53.htm 32203 - Disclosure - Financial Risk Management (Tables) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementTables Financial Risk Management (Tables) Tables http://www.fairfax.ca/role/DisclosureFinancialRiskManagement 53 false false R54.htm 32303 - Disclosure - Segmented Information (Tables) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationTables Segmented Information (Tables) Tables http://www.fairfax.ca/role/DisclosureSegmentedInformation 54 false false R55.htm 32403 - Disclosure - Expenses (Tables) Sheet http://www.fairfax.ca/role/DisclosureExpensesTables Expenses (Tables) Tables http://www.fairfax.ca/role/DisclosureExpenses 55 false false R56.htm 32503 - Disclosure - Supplementary Cash Flow Information (Tables) Sheet http://www.fairfax.ca/role/DisclosureSupplementaryCashFlowInformationTables Supplementary Cash Flow Information (Tables) Tables http://www.fairfax.ca/role/DisclosureSupplementaryCashFlowInformation 56 false false R57.htm 32603 - Disclosure - Related Party Transactions (Tables) Sheet http://www.fairfax.ca/role/DisclosureRelatedPartyTransactionsTables Related Party Transactions (Tables) Tables http://www.fairfax.ca/role/DisclosureRelatedPartyTransactions 57 false false R58.htm 32703 - Disclosure - Subsidiaries (Tables) Sheet http://www.fairfax.ca/role/DisclosureSubsidiariesTables Subsidiaries (Tables) Tables http://www.fairfax.ca/role/DisclosureSubsidiaries 58 false false R59.htm 40501 - Disclosure - Cash and Investments - Total cash and investments, net of derivative obligations (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsTotalCashAndInvestmentsNetOfDerivativeObligationsDetails Cash and Investments - Total cash and investments, net of derivative obligations (Details) Details 59 false false R60.htm 40502 - Disclosure - Cash and Investments - Assets pledged to third parties (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsAssetsPledgedToThirdPartiesDetails Cash and Investments - Assets pledged to third parties (Details) Details 60 false false R61.htm 40503 - Disclosure - Cash and Investments - Fixed Income Maturity Profile (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsFixedIncomeMaturityProfileDetails Cash and Investments - Fixed Income Maturity Profile (Details) Details 61 false false R62.htm 40504 - Disclosure - Cash and Investments - Fair value hierarchy (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsFairValueHierarchyDetails Cash and Investments - Fair value hierarchy (Details) Details 62 false false R63.htm 40505 - Disclosure - Cash and Investments - Changes in Level 3 financial assets (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsChangesInLevel3FinancialAssetsDetails Cash and Investments - Changes in Level 3 financial assets (Details) Details 63 false false R64.htm 40506 - Disclosure - Cash and Investments - Fair value assets valuation (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsFairValueAssetsValuationDetails Cash and Investments - Fair value assets valuation (Details) Details 64 false false R65.htm 40507 - Disclosure - Cash and Investments - Interest and dividends and share of profit of associates (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsInterestAndDividendsAndShareOfProfitOfAssociatesDetails Cash and Investments - Interest and dividends and share of profit of associates (Details) Details 65 false false R66.htm 40508 - Disclosure - Cash and Investments - Net gains (losses) on investments (Details) Sheet http://www.fairfax.ca/role/DisclosureCashAndInvestmentsNetGainsLossesOnInvestmentsDetails Cash and Investments - Net gains (losses) on investments (Details) Details 66 false false R67.htm 40601 - Disclosure - Investments in Associates - Summary (Details) Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociatesSummaryDetails Investments in Associates - Summary (Details) Details 67 false false R68.htm 40602 - Disclosure - Investments in Associates - Balance sheet disclosures (Details) Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociatesBalanceSheetDisclosuresDetails Investments in Associates - Balance sheet disclosures (Details) Details 68 false false R69.htm 40603 - Disclosure - Investments in Associates - Insurance and reinsurance associates and joint ventures (Details) Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociatesInsuranceAndReinsuranceAssociatesAndJointVenturesDetails Investments in Associates - Insurance and reinsurance associates and joint ventures (Details) Details 69 false false R70.htm 40604 - Disclosure - Investments in Associates - Non-insurance associates and joint ventures (Details) Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociatesNonInsuranceAssociatesAndJointVenturesDetails Investments in Associates - Non-insurance associates and joint ventures (Details) Details 70 false false R71.htm 40605 - Disclosure - Investments in Associates - Annual changes in carrying value (Details) Sheet http://www.fairfax.ca/role/DisclosureInvestmentsInAssociatesAnnualChangesInCarryingValueDetails Investments in Associates - Annual changes in carrying value (Details) Details 71 false false R72.htm 40701 - Disclosure - Derivatives - Summary (Details) Sheet http://www.fairfax.ca/role/DisclosureDerivativesSummaryDetails Derivatives - Summary (Details) Details 72 false false R73.htm 40702 - Disclosure - Derivatives - Equity derivative contracts (Details) Sheet http://www.fairfax.ca/role/DisclosureDerivativesEquityDerivativeContractsDetails Derivatives - Equity derivative contracts (Details) Details 73 false false R74.htm 40703 - Disclosure - Derivatives - Other derivative contracts (Details) Sheet http://www.fairfax.ca/role/DisclosureDerivativesOtherDerivativeContractsDetails Derivatives - Other derivative contracts (Details) Details 74 false false R75.htm 40704 - Disclosure - Derivatives - Counterparty collateral (Details) Sheet http://www.fairfax.ca/role/DisclosureDerivativesCounterpartyCollateralDetails Derivatives - Counterparty collateral (Details) Details 75 false false R76.htm 40801 - Disclosure - Insurance Contract Liabilities - Summary (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesSummaryDetails Insurance Contract Liabilities - Summary (Details) Details 76 false false R77.htm 40802 - Disclosure - Insurance Contract Liabilities - Contracts measured under PAA (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesContractsMeasuredUnderPaaDetails Insurance Contract Liabilities - Contracts measured under PAA (Details) Details 77 false false R78.htm 40803 - Disclosure - Insurance Contract Liabilities - Movements in insurance contracts issued (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesMovementsInInsuranceContractsIssuedDetails Insurance Contract Liabilities - Movements in insurance contracts issued (Details) Details 78 false false R79.htm 40804 - Disclosure - Insurance Contract Liabilities - Discount rates (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesDiscountRatesDetails Insurance Contract Liabilities - Discount rates (Details) Details 79 false false R80.htm 40805 - Disclosure - Insurance Contract Liabilities - Risk adjustment for non-financial risk (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesRiskAdjustmentForNonFinancialRiskDetails Insurance Contract Liabilities - Risk adjustment for non-financial risk (Details) Details 80 false false R81.htm 40806 - Disclosure - Insurance Contract Liabilities - Estimates of undiscounted cumulative claims (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesEstimatesOfUndiscountedCumulativeClaimsDetails Insurance Contract Liabilities - Estimates of undiscounted cumulative claims (Details) Details 81 false false R82.htm 40807 - Disclosure - Insurance Contract Liabilities - Reconciliation to the LIC (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractLiabilitiesReconciliationToLicDetails Insurance Contract Liabilities - Reconciliation to the LIC (Details) Details 82 false false R83.htm 40901 - Disclosure - Reinsurance Contract Assets Held - Summary (Details) Sheet http://www.fairfax.ca/role/DisclosureReinsuranceContractAssetsHeldSummaryDetails Reinsurance Contract Assets Held - Summary (Details) Details 83 false false R84.htm 40902 - Disclosure - Reinsurance Contract Assets Held - Contracts measured under PAA (Details) Sheet http://www.fairfax.ca/role/DisclosureReinsuranceContractAssetsHeldContractsMeasuredUnderPaaDetails Reinsurance Contract Assets Held - Contracts measured under PAA (Details) Details 84 false false R85.htm 40903 - Disclosure - Reinsurance Contract Assets Held - Movements in reinsurance contract assets held (Details) Sheet http://www.fairfax.ca/role/DisclosureReinsuranceContractAssetsHeldMovementsInReinsuranceContractAssetsHeldDetails Reinsurance Contract Assets Held - Movements in reinsurance contract assets held (Details) Details 85 false false R86.htm 41001 - Disclosure - Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held (Details) Sheet http://www.fairfax.ca/role/DisclosureNetFinanceIncomeOrExpenseFromInsuranceContractsAndReinsuranceContractAssetsHeldDetails Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held (Details) Details http://www.fairfax.ca/role/DisclosureNetFinanceIncomeOrExpenseFromInsuranceContractsAndReinsuranceContractAssetsHeldTables 86 false false R87.htm 41002 - Disclosure - Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held - Changes in discount rates (Details) Sheet http://www.fairfax.ca/role/DisclosureNetFinanceIncomeOrExpenseFromInsuranceContractsAndReinsuranceContractAssetsHeldChangesInDiscountRatesDetails Net Finance Income or Expense from Insurance Contracts and Reinsurance Contract Assets Held - Changes in discount rates (Details) Details 87 false false R88.htm 41101 - Disclosure - Insurance Contract Receivables and Payables - Summary of insurance contract receivables (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractReceivablesAndPayablesSummaryOfInsuranceContractReceivablesDetails Insurance Contract Receivables and Payables - Summary of insurance contract receivables (Details) Details 88 false false R89.htm 41102 - Disclosure - Insurance Contract Receivables and Payables - Summary of insurance contract payables (Details) Sheet http://www.fairfax.ca/role/DisclosureInsuranceContractReceivablesAndPayablesSummaryOfInsuranceContractPayablesDetails Insurance Contract Receivables and Payables - Summary of insurance contract payables (Details) Details 89 false false R90.htm 41201 - Disclosure - Goodwill and Intangible Assets - Changes in Goodwill and Intangible Assets (Details) Sheet http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssetsChangesInGoodwillAndIntangibleAssetsDetails Goodwill and Intangible Assets - Changes in Goodwill and Intangible Assets (Details) Details 90 false false R91.htm 41202 - Disclosure - Goodwill and Intangible Assets - Net (Details) Sheet http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssetsNetDetails Goodwill and Intangible Assets - Net (Details) Details http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssetsTables 91 false false R92.htm 41203 - Disclosure - Goodwill and Intangible Assets - Allocation to CGUs (Details) Sheet http://www.fairfax.ca/role/DisclosureGoodwillAndIntangibleAssetsAllocationToCgusDetails Goodwill and Intangible Assets - Allocation to CGUs (Details) Details 92 false false R93.htm 41301 - Disclosure - Other Assets (Details) Sheet http://www.fairfax.ca/role/DisclosureOtherAssetsDetails Other Assets (Details) Details http://www.fairfax.ca/role/DisclosureOtherAssetsTables 93 false false R94.htm 41401 - Disclosure - Accounts Payable and Accrued Liabilities (Details) Sheet http://www.fairfax.ca/role/DisclosureAccountsPayableAndAccruedLiabilitiesDetails Accounts Payable and Accrued Liabilities (Details) Details http://www.fairfax.ca/role/DisclosureAccountsPayableAndAccruedLiabilitiesTables 94 false false R95.htm 41501 - Disclosure - Borrowings - Summary (Details) Sheet http://www.fairfax.ca/role/DisclosureBorrowingsSummaryDetails Borrowings - Summary (Details) Details 95 false false R96.htm 41502 - Disclosure - Borrowings - New Transactions (Details) Sheet http://www.fairfax.ca/role/DisclosureBorrowingsNewTransactionsDetails Borrowings - New Transactions (Details) Details 96 false false R97.htm 41503 - Disclosure - Borrowings - Changes in the carrying values of borrowings (Details) Sheet http://www.fairfax.ca/role/DisclosureBorrowingsChangesInCarryingValuesOfBorrowingsDetails Borrowings - Changes in the carrying values of borrowings (Details) Details 97 false false R98.htm 41504 - Disclosure - Borrowings - Principal Repayments (Details) Sheet http://www.fairfax.ca/role/DisclosureBorrowingsPrincipalRepaymentsDetails Borrowings - Principal Repayments (Details) Details 98 false false R99.htm 41505 - Disclosure - Borrowings - Interest Expense (Details) Sheet http://www.fairfax.ca/role/DisclosureBorrowingsInterestExpenseDetails Borrowings - Interest Expense (Details) Details 99 false false R100.htm 41601 - Disclosure - Total Equity - Authorized and Issued capital (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityAuthorizedAndIssuedCapitalDetails Total Equity - Authorized and Issued capital (Details) Details 100 false false R101.htm 41602 - Disclosure - Total Equity - Common Stock, Number of shares outstanding (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityCommonStockNumberOfSharesOutstandingDetails Total Equity - Common Stock, Number of shares outstanding (Details) Details 101 false false R102.htm 41603 - Disclosure - Total Equity - Common stock - narrative (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityCommonStockNarrativeDetails Total Equity - Common stock - narrative (Details) Details 102 false false R103.htm 41604 - Disclosure - Total Equity - Dividends Paid (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityDividendsPaidDetails Total Equity - Dividends Paid (Details) Details 103 false false R104.htm 41605 - Disclosure - Total Equity - Preferred Shares (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityPreferredSharesDetails Total Equity - Preferred Shares (Details) Details 104 false false R105.htm 41606 - Disclosure - Total Equity - Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityAccumulatedOtherComprehensiveIncomeLossDetails Total Equity - Accumulated Other Comprehensive Income (Loss) (Details) Details 105 false false R106.htm 41607 - Disclosure - Total Equity - Non-Controlling Interests (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityNonControllingInterestsDetails Total Equity - Non-Controlling Interests (Details) Details 106 false false R107.htm 41608 - Disclosure - Total Equity - Net Changes In Capitalization (Details) Sheet http://www.fairfax.ca/role/DisclosureTotalEquityNetChangesInCapitalizationDetails Total Equity - Net Changes In Capitalization (Details) Details 107 false false R108.htm 41701 - Disclosure - Earnings per Share (Details) Sheet http://www.fairfax.ca/role/DisclosureEarningsPerShareDetails Earnings per Share (Details) Details http://www.fairfax.ca/role/DisclosureEarningsPerShareTables 108 false false R109.htm 41801 - Disclosure - Income Taxes - Provision for income taxes (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesProvisionForIncomeTaxesDetails Income Taxes - Provision for income taxes (Details) Details 109 false false R110.htm 41802 - Disclosure - Income Taxes - Earnings before income taxes (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesEarningsBeforeIncomeTaxesDetails Income Taxes - Earnings before income taxes (Details) Details 110 false false R111.htm 41803 - Disclosure - Income Taxes - Income tax reconciliation (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesIncomeTaxReconciliationDetails Income Taxes - Income tax reconciliation (Details) Details 111 false false R112.htm 41804 - Disclosure - Income Taxes - Income taxes refundable and payable (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesIncomeTaxesRefundableAndPayableDetails Income Taxes - Income taxes refundable and payable (Details) Details 112 false false R113.htm 41805 - Disclosure - Income Taxes - Changes in net income taxes payable (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesChangesInNetIncomeTaxesPayableDetails Income Taxes - Changes in net income taxes payable (Details) Details 113 false false R114.htm 41806 - Disclosure - Income Taxes - Changes in net deferred income tax asset (liability) (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesChangesInNetDeferredIncomeTaxAssetLiabilityDetails Income Taxes - Changes in net deferred income tax asset (liability) (Details) Details 114 false false R115.htm 41807 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.fairfax.ca/role/DisclosureIncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 115 false false R116.htm 41901 - Disclosure - Statutory Requirements (Details) Sheet http://www.fairfax.ca/role/DisclosureStatutoryRequirementsDetails Statutory Requirements (Details) Details http://www.fairfax.ca/role/DisclosureStatutoryRequirementsTables 116 false false R117.htm 42001 - Disclosure - Contingencies and Commitments (Details) Sheet http://www.fairfax.ca/role/DisclosureContingenciesAndCommitmentsDetails Contingencies and Commitments (Details) Details http://www.fairfax.ca/role/DisclosureContingenciesAndCommitments 117 false false R118.htm 42101 - Disclosure - Acquisitions and Divestitures - Sale of Eurolife life insurance operations to Eurobank (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresSaleOfEurolifeLifeInsuranceOperationsToEurobankDetails Acquisitions and Divestitures - Sale of Eurolife life insurance operations to Eurobank (Details) Details 118 false false R119.htm 42102 - Disclosure - Acquisitions and Divestitures - Acquisition of The Keg Royalties Income Fund (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresAcquisitionOfKegRoyaltiesIncomeFundDetails Acquisitions and Divestitures - Acquisition of The Keg Royalties Income Fund (Details) Details 119 false false R120.htm 42103 - Disclosure - Acquisitions and Divestitures - Reverse take-over of Boat Rocker (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresReverseTakeOverOfBoatRockerDetails Acquisitions and Divestitures - Reverse take-over of Boat Rocker (Details) Details 120 false false R121.htm 42104 - Disclosure - Acquisitions and Divestitures - Acquisition of Peak Achievement Athletics Inc. (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresAcquisitionOfPeakAchievementAthleticsIncDetails Acquisitions and Divestitures - Acquisition of Peak Achievement Athletics Inc. (Details) Details 121 false false R122.htm 42105 - Disclosure - Acquisitions and Divestitures - Acquisition of Meadow Foods Limited (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresAcquisitionOfMeadowFoodsLimitedDetails Acquisitions and Divestitures - Acquisition of Meadow Foods Limited (Details) Details 122 false false R123.htm 42106 - Disclosure - Acquisitions and Divestitures - Acquisition of Sleep Country Canada Holdings Inc. (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresAcquisitionOfSleepCountryCanadaHoldingsIncDetails Acquisitions and Divestitures - Acquisition of Sleep Country Canada Holdings Inc. (Details) Details 123 false false R124.htm 42107 - Disclosure - Acquisitions and Divestitures - Fair value of assets and liabilities in connections with acquisitions (Details) Sheet http://www.fairfax.ca/role/DisclosureAcquisitionsAndDivestituresFairValueOfAssetsAndLiabilitiesInConnectionsWithAcquisitionsDetails Acquisitions and Divestitures - Fair value of assets and liabilities in connections with acquisitions (Details) Details 124 false false R125.htm 42201 - Disclosure - Financial Risk Management - Concentration of insurance risk (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementConcentrationOfInsuranceRiskDetails Financial Risk Management - Concentration of insurance risk (Details) Details 125 false false R126.htm 42202 - Disclosure - Financial Risk Management - Credit Risk - Gross credit risk exposure (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementCreditRiskGrossCreditRiskExposureDetails Financial Risk Management - Credit Risk - Gross credit risk exposure (Details) Details 126 false false R127.htm 42203 - Disclosure - Financial Risk Management - Credit Risk - Investments in debt instruments (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementCreditRiskInvestmentsInDebtInstrumentsDetails Financial Risk Management - Credit Risk - Investments in debt instruments (Details) Details 127 false false R128.htm 42204 - Disclosure - Financial Risk Management - Credit Risk - Counterparties to derivative contracts (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementCreditRiskCounterpartiesToDerivativeContractsDetails Financial Risk Management - Credit Risk - Counterparties to derivative contracts (Details) Details 128 false false R129.htm 42205 - Disclosure - Financial Risk Management - Credit Risk - Reinsurance contract assets (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementCreditRiskReinsuranceContractAssetsDetails Financial Risk Management - Credit Risk - Reinsurance contract assets (Details) Details 129 false false R130.htm 42206 - Disclosure - Financial Risk Management - Liquidity Risk (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementLiquidityRiskDetails Financial Risk Management - Liquidity Risk (Details) Details 130 false false R131.htm 42207 - Disclosure - Financial Risk Management - Liquidity Risk - Maturity profile of the insurance contract liabilities (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementLiquidityRiskMaturityProfileOfInsuranceContractLiabilitiesDetails Financial Risk Management - Liquidity Risk - Maturity profile of the insurance contract liabilities (Details) Details 131 false false R132.htm 42208 - Disclosure - Financial Risk Management - Liquidity Risk - Maturity profile of financial and insurance liabilities (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementLiquidityRiskMaturityProfileOfFinancialAndInsuranceLiabilitiesDetails Financial Risk Management - Liquidity Risk - Maturity profile of financial and insurance liabilities (Details) Details 132 false false R133.htm 42209 - Disclosure - Financial Risk Management - Liquidity Risk - Derivative Financial Liabilities (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementLiquidityRiskDerivativeFinancialLiabilitiesDetails Financial Risk Management - Liquidity Risk - Derivative Financial Liabilities (Details) Details 133 false false R134.htm 42210 - Disclosure - Financial Risk Management - Market Risk - Interest rate risk (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementMarketRiskInterestRateRiskDetails Financial Risk Management - Market Risk - Interest rate risk (Details) Details 134 false false R135.htm 42211 - Disclosure - Financial Risk Management - Market Risk - Equity and equity-related holdings (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementMarketRiskEquityAndEquityRelatedHoldingsDetails Financial Risk Management - Market Risk - Equity and equity-related holdings (Details) Details 135 false false R136.htm 42212 - Disclosure - Financial Risk Management - Market Risk - Impact on Net Earnings (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementMarketRiskImpactOnNetEarningsDetails Financial Risk Management - Market Risk - Impact on Net Earnings (Details) Details 136 false false R137.htm 42213 - Disclosure - Financial Risk Management - Market Risk - Foreign currency risk (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementMarketRiskForeignCurrencyRiskDetails Financial Risk Management - Market Risk - Foreign currency risk (Details) Details 137 false false R138.htm 42214 - Disclosure - Financial Risk Management - Market Risk - Foreign currency effects on the consolidated statement of earnings (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementMarketRiskForeignCurrencyEffectsOnConsolidatedStatementOfEarningsDetails Financial Risk Management - Market Risk - Foreign currency effects on the consolidated statement of earnings (Details) Details 138 false false R139.htm 42215 - Disclosure - Financial Risk Management - Market Risk - Foreign currency effects on the consolidated statement of other comprehensive income (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementMarketRiskForeignCurrencyEffectsOnConsolidatedStatementOfOtherComprehensiveIncomeDetails Financial Risk Management - Market Risk - Foreign currency effects on the consolidated statement of other comprehensive income (Details) Details 139 false false R140.htm 42216 - Disclosure - Financial Risk Management - Capital Management - Financial measurements and ratios (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementCapitalManagementFinancialMeasurementsAndRatiosDetails Financial Risk Management - Capital Management - Financial measurements and ratios (Details) Details 140 false false R141.htm 42217 - Disclosure - Financial Risk Management - Capital Management - Additional disclosures (Details) Sheet http://www.fairfax.ca/role/DisclosureFinancialRiskManagementCapitalManagementAdditionalDisclosuresDetails Financial Risk Management - Capital Management - Additional disclosures (Details) Details 141 false false R142.htm 42301 - Disclosure - Segmented Information - Insurance revenue and operating income (loss) by reporting segment (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationInsuranceRevenueAndOperatingIncomeLossByReportingSegmentDetails Segmented Information - Insurance revenue and operating income (loss) by reporting segment (Details) Details 142 false false R143.htm 42302 - Disclosure - Segmented Information - Corporate Overhead (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationCorporateOverheadDetails Segmented Information - Corporate Overhead (Details) Details 143 false false R144.htm 42303 - Disclosure - Segmented Information - Investments In Associates, Additions to goodwill, Segment assets and liabilities (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationInvestmentsInAssociatesAdditionsToGoodwillSegmentAssetsAndLiabilitiesDetails Segmented Information - Investments In Associates, Additions to goodwill, Segment assets and liabilities (Details) Details 144 false false R145.htm 42304 - Disclosure - Segmented Information - Product Line (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationProductLineDetails Segmented Information - Product Line (Details) Details 145 false false R146.htm 42305 - Disclosure - Segmented Information - Geographic Region (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationGeographicRegionDetails Segmented Information - Geographic Region (Details) Details 146 false false R147.htm 42306 - Disclosure - Segmented Information - Non-insurance companies (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationNonInsuranceCompaniesDetails Segmented Information - Non-insurance companies (Details) Details 147 false false R148.htm 42307 - Disclosure - Segmented Information - Segmented Balance Sheet (Details) Sheet http://www.fairfax.ca/role/DisclosureSegmentedInformationSegmentedBalanceSheetDetails Segmented Information - Segmented Balance Sheet (Details) Details 148 false false R149.htm 42401 - Disclosure - Expenses (Details) Sheet http://www.fairfax.ca/role/DisclosureExpensesDetails Expenses (Details) Details http://www.fairfax.ca/role/DisclosureExpensesTables 149 false false R150.htm 42501 - Disclosure - Supplementary Cash Flow Information - Cash and cash equivalents (Details) Sheet http://www.fairfax.ca/role/DisclosureSupplementaryCashFlowInformationCashAndCashEquivalentsDetails Supplementary Cash Flow Information - Cash and cash equivalents (Details) Details 150 false false R151.htm 42502 - Disclosure - Supplementary Cash Flow Information - Additional disclosures (Details) Sheet http://www.fairfax.ca/role/DisclosureSupplementaryCashFlowInformationAdditionalDisclosuresDetails Supplementary Cash Flow Information - Additional disclosures (Details) Details 151 false false R152.htm 42601 - Disclosure - Related Party Transactions (Details) Sheet http://www.fairfax.ca/role/DisclosureRelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://www.fairfax.ca/role/DisclosureRelatedPartyTransactionsTables 152 false false R153.htm 42701 - Disclosure - Subsidiaries (Details) Sheet http://www.fairfax.ca/role/DisclosureSubsidiariesDetails Subsidiaries (Details) Details http://www.fairfax.ca/role/DisclosureSubsidiariesTables 153 false false All Reports Book All Reports ffh-20251231.xsd ffh-20251231_cal.xml ffh-20251231_def.xml ffh-20251231_lab.xml ffh-20251231_pre.xml ffh-20251231x40f.htm ffh-20251231xex99d2.htm ffh-20251231xex99d2001.jpg ffh-20251231xex99d2002.jpg ffh-20251231xex99d2003.jpg ffh-20251231xex99d2005.jpg http://xbrl.sec.gov/dei/2025 https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full true true