Variable Interest Entity, Primary Beneficiary, Does Not Hold Majority Voting Interest, Disclosures [Abstract]
Managed Investment Entities
Variable Interest Entity, Primary Beneficiary, Does Not Hold Majority Voting Interest, Disclosures [Text Block]
The entire disclosure of consolidation and basis of presentation of variable interest entities, in which the registrant is deemed to be the primary beneficiary, even though it does not hold a majority voting interest.
Stockholders' Equity Note [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2016-01
Accounting Standards Update 2016-01 [Member]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Domain]
Major Types of Debt and Equity Securities [Domain]
Equity securities
Equity Securities [Member]
Award Type [Axis]
Award Type [Axis]
Equity Award [Domain]
Equity Award [Domain]
Stock Incentive Plan
Stock Compensation Plan [Member]
Annual Equity Bonus Plan
Annual Equity Bonus Plan [Member]
Annual Equity Bonus Plan.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net of tax unrealized gains (losses) related to credit-only impaired securities
Net Of Tax Unrealized Gains Losses On Credit Only Impaired Securities
The net of tax unrealized gains or losses related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.
Cumulative effect of accounting change
Cumulative Effect of New Accounting Principle in Period of Adoption
Restricted Common Stock, shares issued (shares)
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Restricted Common Stock, fair value per share (USD per share)
Restricted Common Stock Issued Fair Value Per Share
Restricted Common Stock issued, fair value per share.
Other benefit plans, shares issued (shares)
Stock Issued During Period, Shares, Share-based Compensation, Gross
Common Stock issued, fair value per share (USD per share)
Common Stock Issued During Period Fair Value Per Share
Common stock issued during period, fair value per share.
Common Stock options issued under stock incentive plan (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures
Compensation expense related to stock incentive plans
Allocated Share-based Compensation Expense
Insurance [Abstract]
Reconciliation of beginning and ending liability for unpaid losses and loss adjustment expenses
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]
Insurance
Insurance Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Inputs, Assets, Quantitative Information [Table]
Fair Value Inputs, Assets, Quantitative Information [Table]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Derivative Instrument Risk [Axis]
Derivative Instrument [Axis]
Derivative Contract Type [Domain]
Derivative Contract [Domain]
Embedded derivatives
Embedded Derivative Financial Instruments [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Unobservable inputs used by management in determining fair value of embedded derivatives
Unobservable Inputs Used In Determining Fair Value Of Embedded Derivatives [Abstract]
Unobservable inputs used in determining fair value of embedded derivatives.
Adjustment for insurance subsidiary's credit risk
Fair Value Inputs, Entity Credit Risk
Risk margin for uncertainty in cash flows
Fair Value Inputs Risk Margin For Uncertainty In Cash Flows
Risk associated with risk margin for uncertainty in cash flows, expressed as a percentage, used as an input to measure fair value.
Surrenders
Fair Value Inputs Surrenders
Risk associated with risk of surrenders, expressed as a percentage, used as an input to measure fair value.
Partial surrenders
Fair Value Inputs Partial Surrenders
Risk associated with risk of partial surrenders, expressed as a percentage, used as an input to measure fair value.
Annuitizations
Fair Value Inputs Annuitizations
Risk associated with risk of annuitizations, expressed as a percentage, used as an input to measure fair value.
Deaths
Fair Value Inputs Deaths
Risk associated with risk of deaths, expressed as a percentage, used as an input to measure fair value.
Budgeted option costs
Fair Value Inputs Budgeted Option Costs
Risk associated with risk of budgeted option costs, expressed as a percentage, used as an input to measure fair value.
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Segment Reporting [Abstract]
Segments of Operations
Segment Reporting Disclosure [Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangibles
Goodwill and Intangible Assets Disclosure [Text Block]
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Statement, Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Total
Parent [Member]
Common Shares
Common Stock [Member]
Common Stock and Capital Surplus
Common Stock Including Additional Paid in Capital [Member]
Retained Earnings
Retained Earnings [Member]
Accumulated Other Comp. Income (Loss)
AOCI Attributable to Parent [Member]
Noncontrolling interests
Noncontrolling Interest [Member]
Statement [Line Items]
Statement [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, shares
Common Stock, Shares, Outstanding
Beginning Balance
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Net earnings (losses) attributable to parent
Net Income (Loss) Attributable to Parent
Net earnings (losses) including portion attributable to nonredeemable noncontrolling interest
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Dividends on Common Stock
Dividends, Common Stock, Cash
Shares issued:
Shares Issued [Abstract]
Shares issued.
Exercise of stock options, shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Exercise of stock options
Stock Issued During Period, Value, Stock Options Exercised
Restricted stock awards, shares
Restricted stock awards
Stock Issued During Period, Value, Restricted Stock Award, Gross
Other benefit plans, shares
Other benefit plans
Stock Issued During Period, Value, Share-based Compensation, Gross
Dividend reinvestment plan, shares
Stock Issued During Period, Shares, Dividend Reinvestment Plan
Dividend reinvestment plan
Stock Issued During Period, Value, Dividend Reinvestment Plan
Stock-based compensation expense
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Shares exchanged — benefit plans, shares
Stock Repurchased Shares Exchanged in Stock Compensation Plans, Shares
Repurchased shares exchanged in stock compensation plans, shares
Shares exchanged — benefit plans
Stock Repurchased Shares Exchanged in Stock Compensation Plans, Value
Stock repurchased, shares exchanged in stock compensation plans, value.
Forfeitures of restricted stock, shares
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited
Forfeitures of restricted stock
Stock Issued During Period, Value, Restricted Stock Award, Forfeitures
Other
Stockholders' Equity, Other
Ending Balance, shares
Ending Balance
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Beginning Balance, Redeemable Noncontrolling Interests
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests
Net earnings attributable to redeemable noncontrolling interests
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest
Other
Temporary Equity, Other Changes
Ending Balance, Redeemable Noncontrolling Interests
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Fixed maturities
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains and losses on the sale of available for sale fixed maturity and equity security investments
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Gross gains
Available-for-sale Securities, Gross Realized Gains
Gross losses
Available-for-sale Securities, Gross Realized Losses
Document and Entity Information [Abstract]
Document and Entity Information.
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Document Type
Document Type
Document Period End Date
Document Period End Date
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Statement of Financial Position [Abstract]
Assets:
Assets [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Investments:
Investments [Abstract]
Fixed maturities, available for sale at fair value (amortized cost — $39,244 and $37,038)
Available-for-sale Securities, Debt Securities
Fixed maturities, trading at fair value
Trading Securities, Debt
Equity securities, at fair value
Equity Securities, FV-NI
Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).
Investments accounted for using the equity method
Equity Method Investments
Mortgage loans
Mortgage Loans on Real Estate, Commercial and Consumer, Net
Policy loans
Loans, Gross, Insurance Policy
Equity index call options
Derivative Asset
Real estate and other investments
Other Investments
Total cash and investments
Investments and Cash
Recoverables from reinsurers
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments
Prepaid reinsurance premiums
Prepaid Reinsurance Premiums
Agents’ balances and premiums receivable
Premiums Receivable, Net
Deferred policy acquisition costs
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net
Assets of managed investment entities
Variable Interest Entity, Consolidated, Carrying Amount, Assets
Other receivables
Other Receivables
Variable annuity assets (separate accounts)
Separate Account Assets
Other assets
Other Assets
Goodwill
Goodwill
Total assets
Assets
Liabilities and Equity:
Liabilities and Equity [Abstract]
Unpaid losses and loss adjustment expenses
Liability for Claims and Claims Adjustment Expense, Property Casualty Liability
Unearned premiums
Unearned Premiums
Annuity benefits accumulated
Liability for Future Policy Benefits, Individual and Group Annuities and Supplementary Contracts
Life, accident and health reserves
Liability For Life, Accident and Health Reserves
The sum of the known and estimated amounts payable as of the balance sheet date to traditional life insurance policyholders, and under disability and accident insurance contracts, that relate to insured events which can be viewed as either (a) the present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders. This sum also includes amounts payable to universal life insurance policyholders for which the liability is equal to the account value.
Payable to reinsurers
Reinsurance Payable
Liabilities of managed investment entities
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities
Long-term debt
Long-term Debt
Variable annuity liabilities (separate accounts)
Separate Accounts, Liability
Other liabilities
Other Liabilities
Total liabilities
Liabilities
Temporary equity
Temporary Equity [Abstract]
Redeemable noncontrolling interests
Redeemable Noncontrolling Interest, Equity, Carrying Amount
Shareholders’ equity:
Stockholders' Equity Attributable to Parent [Abstract]
Common Stock, no par value — 200,000,000 shares authorized — 89,072,114 and 88,275,460 shares outstanding
Common Stock, Value, Issued
Capital surplus
Additional Paid in Capital, Common Stock
Retained earnings
Retained Earnings, Unappropriated
Accumulated other comprehensive income, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total shareholders’ equity
Stockholders' Equity Attributable to Parent
Noncontrolling interests
Stockholders' Equity Attributable to Noncontrolling Interest
Total equity
Total liabilities and equity
Liabilities and Equity
Accounting Policies [Abstract]
Accounting Policies
Significant Accounting Policies [Text Block]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Carrying Value
Reported Value Measurement [Member]
Fair Value
Estimate of Fair Value Measurement [Member]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Level 3
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value and fair value of financial instruments that are not carried at fair value
Financial Instruments Financial Assets And Liabilities Balance Sheet Groupings [Abstract]
Financial instruments financial assets and liabilities balance sheet groupings.
Financial assets:
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Total financial assets not accounted for at fair value
Financial Assets Not Accounted For At Fair Value
Total financial assets not accounted for at fair value.
Financial liabilities:
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Annuity benefits accumulated
Annuity Benefits Accumulated Excluding Life Contingent Annuities
Annuity Benefits Accumulated Excluding Life Contingent Annuities.
Total financial liabilities not accounted for at fair value
Financial Liabilities Not Accounted For At Fair Value
Total financial liabilities not accounted for at fair value.
Fixed maturities, available for sale at amortized cost
Available-for-sale Debt Securities, Amortized Cost Basis
Common Stock, par value (USD per share)
Common Stock, No Par Value
Common Stock, shares authorized
Common Stock, Shares Authorized
Common Stock, shares outstanding
Total fixed maturities
U.S. Government and government agencies
US Treasury and Government [Member]
States, municipalities and political subdivisions
US States and Political Subdivisions Debt Securities [Member]
Foreign government
Foreign Government Debt Securities [Member]
Residential MBS
Residential Mortgage Backed Securities [Member]
Commercial MBS
Commercial Mortgage Backed Securities [Member]
Asset-backed securities
Asset-backed Securities [Member]
Corporate and other
Corporate Debt Securities [Member]
Total equity securities
Common stocks
Perpetual preferred stocks
Preferred Stock [Member]
Available for sale securities in a continuous unrealized loss position
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Unrealized Loss - Less than twelve months
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Fair Value - Less than twelve months
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value
Fair Value as % of Cost - Less than twelve months
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, Fair Value As Percentage Of Cost
Available for sale securities continuous unrealized loss position less than twelve months fair value as percentage of cost.
Unrealized Loss - Twelve months or more
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Fair Value - Twelve months or more
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Fair Value as % of Cost - Twelve months or more
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months Or Longer, Fair Value As Percentage Of Cost
Available for sale securities continuous unrealized loss position twelve months or longer fair value as percentage of cost.
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred Policy Acquisition Costs
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits [Text Block]
This element includes data and tables pertaining to (1) the nature and amount of capitalized costs incurred to write or acquire insurance contracts and the accounting for such deferred acquisition costs (DAC) and (2) the nature and amount of the present value of future profits (PVFP) of estimated net cash flows embedded in the existing long-duration contracts of acquired life insurance entities, the amount of amortization and other information pertinent to an understanding of PVFP, which is also known as Value of Business Acquired, or VOBA.
Schedule of Investment Income, Reported Amounts, by Category [Table]
Investment Income [Table]
Dividends [Axis]
Dividends [Axis]
Dividends [Domain]
Dividends [Domain]
Investment income
Investment Income [Member]
Investment Type [Axis]
Investment Type [Axis]
Investments [Domain]
Investments [Domain]
Equity in earnings of partnerships and similar investments
Equity Method Investments [Member]
Other
Other Long-term Investments [Member]
Net Investment Income [Line Items]
Net Investment Income [Line Items]
Investment income
Gross Investment Income, Operating
Investment expenses
Investment Income, Investment Expense
Net investment income
Net Investment Income
Basis of Presentation
Basis of Accounting [Text Block]
Fair Value Measurements
Fair Value of Financial Instruments, Policy [Policy Text Block]
Investments
Investment, Policy [Policy Text Block]
Derivatives
Derivatives, Policy [Policy Text Block]
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Reinsurance
Reinsurance Accounting Policy [Policy Text Block]
Deferred Policy Acquisition Costs (DPAC)
Deferred Policy Acquisition Costs, Policy [Policy Text Block]
Managed Investment Entities
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Unpaid Losses and Loss Adjustment Expenses
Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block]
Annuity Benefits Accumulated
Annuity Benefits Accumulated [Policy Text Block]
Describes an accounting policy related to an insurance entity's liability for future annuity benefits to be paid to or on behalf of annuity policyholders.
Unearned Revenue
Revenue Recognition, Deferred Revenue [Policy Text Block]
Life, Accident and Health Reserves
Life, Accident and Health Reserves [Policy Text Block]
Describes an accounting policy related to an insurance entity's liability for future life, accident and health benefits to be paid to or on behalf of policyholders.
Debt Issuance Costs
Debt, Policy [Policy Text Block]
Variable Annuity Assets and Liabilities
Policyholder Accounts, Policy [Policy Text Block]
Premium Recognition
Insurance Premiums Revenue Recognition, Policy [Policy Text Block]
Noncontrolling Interests
Noncontrolling Interests [Policy Text Block]
Describes an entity's accounting policy for determining noncontrolling interests.
Income Taxes
Income Tax, Policy [Policy Text Block]
Stock-Based Compensation
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Benefit Plans
Postretirement and Postemployment Benefit Plans [Policy Text Block]
Disclosure of the accounting policy for postretirement and postemployment benefit plans sponsored by the entity.
Earnings Per Share
Earnings Per Share, Policy [Policy Text Block]
Statement of Cash Flows
Statement of Cash Flows [Policy Text Block]
Describes an entity's accounting policy related to the statement of cash flows.
Revenue Recognition Guidance Effective in 2018
New Accounting Pronouncements, Policy [Policy Text Block]
Selected financial information related to collateralized loan obligations
Schedule of Variable Interest Entities [Table Text Block]
Net of tax
Marketable Securities [Member]
Marketable Securities.
Total pretax
Pretax [Member]
Total Pretax.
Mortgage loans and other investments
Mortgage Loans And Other Investments [Member]
Mortgage loans and other investments.
Other, Including DPAC and reserves related to the annuity business
Other, Including DPAC and Reserves on Annuity and Long-term Care [Member]
Other, including deferred policy acquisition costs ("DPAC") asset and annuity benefits accumulated and long-term care liabilities.
Tax effects
Tax Effects [Member]
Tax effects.
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized Gains Losses And Changes In Unrealized Appreciation Depreciation Related To Fixed Maturity And Equity Security Investments [Abstract]
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments.
Realized before impairments
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments
Realized — impairments
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities
Realized gains (losses) on securities
Marketable Securities, Realized Gain (Loss)
Change in unrealized
Change In Unrealized Appreciation Depreciation
Change in unrealized appreciation depreciation.
Changes in the goodwill balance during the period
Goodwill, Period Increase (Decrease)
Amortizable intangible assets related to property and casualty insurance acquisitions
Finite-Lived Intangible Assets, Net
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Amortization of intangible assets
Amortization of Intangible Assets
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Senior Notes
Senior Notes [Member]
Subordinated Debentures
Subordinated Debt [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
4.50% Senior Notes due June 2047
Senior Notes Due In June 2047 [Member]
Senior Notes due in June 2047.
3.50% Senior Notes due August 2026
Senior Notes Due In August 2026 [Member]
Senior Notes due in August 2026.
6-1/4% Subordinated Debentures due September 2054
Subordinated Debentures Due In September 2054 [Member]
Subordinated Debentures due in September 2054.
6% Subordinated Debentures due November 2055
Subordinated Debentures Due In November 2055 [Member]
Subordinated Debentures due in November 2055.
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
AFG
Parent Company [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-term Debt, Fiscal Year Maturity [Abstract]
Long-term Debt, Fiscal Year Maturity [Abstract]
Scheduled principal payments on debt in next year
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year
Scheduled principal payments on debt in year two
Long-term Debt, Maturities, Repayments of Principal in Year Two
Scheduled principal payments on debt in year three
Long-term Debt, Maturities, Repayments of Principal in Year Three
Scheduled principal payments on debt in year four
Long-term Debt, Maturities, Repayments of Principal in Year Four
Scheduled principal payments on debt in year five
Long-term Debt, Maturities, Repayments of Principal in Year Five
Scheduled principal payments on debt in year six
Long-Term Debt, Maturities, Repayments Of Principal In Year Six
Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the sixth fiscal year following the latest fiscal year ended.
Revolving credit line
Line of Credit Facility, Maximum Borrowing Capacity
Interest rate on revolving debt facility
Debt Instrument, Basis Spread on Variable Rate
Amount borrowed under revolving credit facility
Long-term Line of Credit
Interest rate description for revolving credit facility
Line of Credit Facility, Interest Rate Description
Interest rate on debt instruments
Debt Instrument, Interest Rate, Stated Percentage
Holding Gains (Losses) on Equity Securities Still Held [Table]
Holding Gains (Losses) on Equity Securities Still Held [Table]
Tabular disclosure of holding gains (losses) on equity securities still held
Equity Securities [Axis]
Equity Securities [Axis]
Equity Securities [Axis]
Equity Securities [Domain]
Equity Securities [Domain]
[Domain] for Equity Securities [Axis]
Equity securities still owned
Equity Securities Still Owned [Member]
Equity securities still owned at the balance sheet date.
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Realized gains (losses) on securities
Realized Gains (Losses) On Securities [Member]
Primary financial statement caption encompassing realized gains (losses) on securities.
Holding Gains (Losses) on Equity Securities Still Held [Line Items]
Holding Gains (Losses) on Equity Securities Still Held [Line Items]
holding gains (losses) on equity securities still held
Realized gains (losses) on securities still owned
Included in net investment income
Net holding gains (losses) on equity securities
Net Holding Gains (Losses) On Equity Securities
Net holding gains (losses) on equity securities in net earnings on securities that were still owned. All equity securities other than those accounted for under the equity method are carried at fair value through net earnings.
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Earnings before income taxes (“EBT”)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income taxes at statutory rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Effect of stock-based compensation
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount
Effect of tax exempt interest
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount
Effect of dividends received deduction
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount
Effect of employee stock ownership plan dividends paid deduction
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Amount
Effect of foreign operations
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Effect of nondeductible expenses
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount
Effect of change in valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Effect of other income tax reconciliation
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Provision for income taxes as shown on the Statement of Earnings
Income Tax Expense (Benefit)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income taxes at statutory rate as a percentage of EBT
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effect of stock-based compensation as a percentage of EBT
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent
Effect of tax exempt interest as a percentage of EBT
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent
Effect of dividends received deduction as a percentage of EBT
Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent
Effect of employee stock ownership plan dividends paid deduction as a percentage of EBT
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Percent
Effect of foreign operations as a percentage of EBT
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent
Effect of nondeductible expenses as a percentage of EBT
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent
Effect of change in valuation allowance as a percentage of EBT
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent
Effect of other income tax reconciliation as a percentage of EBT
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Provision for income taxes as shown on the Statement of Earnings as a percentage of EBT
Effective Income Tax Rate Reconciliation, Percent
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Derivative Instrument [Axis]
Equity index call options
Call Option [Member]
Asset Class [Axis]
Asset Class [Axis]
Fair Value by Asset Class [Domain]
Asset Class [Domain]
Asset-backed securities
Equity index call options
Other Investments [Member]
Liability Class [Axis]
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
Annuity benefits accumulated
Annuity Benefits Accumulated [Member]
Annuity benefits accumulated.
Other liabilities — derivatives
Other Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets and liabilities measured at fair value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets:
Assets, Fair Value Disclosure [Abstract]
Available for sale (AFS) fixed maturities
Trading fixed maturities
Equity securities
Marketable Securities, Equity Securities
Equity index call options
Assets of managed investment entities (“MIE”)
Assets of managed investment entities Fair value disclosure
Assets of managed investment entities Fair value disclosure.
Variable annuity assets (separate accounts)
Variable Annuity Assets, Fair Value Disclosure
Fair value portion of variable annuity assets held in separate accounts.
Total assets accounted for at fair value
Assets, Fair Value Disclosure
Liabilities:
Liabilities, Fair Value Disclosure [Abstract]
Liabilities of managed investment entities
Liabilities of managed investment entities fair value Disclosure
Liabilities of managed investment entities fair value Disclosure.
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities
Derivative Liability
Total liabilities accounted for at fair value
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Investment [Table]
Investment [Table]
Maximum
Securities with non-credit other-than-temporary impairment charges
Securities With Non-Credit Other Than Temporary Impairment Charges [Member]
Securities with non-credit other than temporary impairment charges.
Corporate bonds
Corporate Bond Securities [Member]
Investment [Line Items]
Investment [Line Items]
Non-credit related portion of other-than-temporary impairment charges taken for securities still owned
Non Credit Related Portion Of OTTI Charges Taken For Securities Still Owned
Non-credit related portion of other-than-temporary impairment charges taken for securities still owned.
Gross unrealized gains
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax
Gross unrealized losses
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax
Gross unrealized losses on fixed maturities
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax
Number of available for sale securities in an unrealized loss position
Number of Available For Sale Securities In Unrealized Loss Position
Number of available-for-sale securities in an unrealized loss position.
Percentage (based on amount of unrealized loss) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade
Percentage (based on unrealized loss) of available for sale fixed maturities that are in unrealized loss position and rated investment grade
Percentage based on unrealized loss of available for sale fixed maturities that are in an unrealized loss position and rated investment grade.
Percentage (based on fair value) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade
Percentage (based on fair value) of available for sale fixed maturities that are in unrealized loss position and rated investment grade
Percentage (based on fair value) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade.
Other than temporary impairment charges
Income Statement [Abstract]
Revenues:
Revenues [Abstract]
Property and casualty insurance net earned premiums
Premiums Earned, Net, Property and Casualty
Life, accident and health net earned premiums
Life, Accident and Health Premiums
Life, accident and health premiums.
Net investment income
Realized gains (losses) on:
Realized Gains (Losses) on [Abstract]
Realized gains (losses) on.
Income (loss) of managed investment entities:
Income (Loss) of Managed Investment Entities [Abstract]
Income (loss) of managed investment entities.
Investment income
Investment Income of Managed Investment Entities
Investment income of managed investment entities.
Gain (loss) on change in fair value of assets/liabilities
Gain (Loss) on Change in Fair Value of Assets and Liabilities of Managed Investment Entities
Loss on change in fair value of assets and liabilities of managed investment entities.
Other income
Other Income
Total revenues
Revenues
Costs and Expenses:
Benefits, Losses and Expenses [Abstract]
Property and casualty insurance: Losses and loss adjustment expenses
Policyholder Benefits and Claims Incurred, Net, Property, Casualty and Liability
Property and casualty insurance: Commissions and other underwriting expenses
Property and Casualty Commissions and Other Underwriting Expenses
Property and casualty commissions and other underwriting expenses.
Annuity benefits
Annuity Benefits
Annuity benefits includes 1) interest credited to policyholders accounts, which provides a guaranteed yield, 2) expenses related to excess benefits expected to be paid on future deaths and annuitizations and 3) net expenses related to changes in embedded derivatives on equity indexed annuities offset by equity index call options.
Life, accident and health benefits
Life, Accident and Health Benefits
Life, accident and health benefits.
Annuity and supplemental insurance acquisition expenses
Annuity and Supplemental Insurance Acquisition Expenses
Annuity and supplemental insurance acquisition expenses.
Interest charges on borrowed money
Interest Expense
Expenses of managed investment entities
Expenses of Managed Investment Entities
Expenses of managed investment entities.
Other expenses
Other Cost and Expense, Operating
Total costs and expenses
Benefits, Losses and Expenses
Earnings before income taxes
Operating Income (Loss)
Provision for income taxes
Net earnings, including noncontrolling interests
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Less: Net earnings (losses) attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net Earnings Attributable to Shareholders
Earnings Attributable to Shareholders per Common Share:
Earnings Per Share [Abstract]
Basic (USD per share)
Earnings Per Share, Basic
Diluted (USD per share)
Earnings Per Share, Diluted
Average number of Common Shares:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (shares)
Weighted Average Number of Shares Outstanding, Diluted
Cash dividends per Common Share (USD per share)
Common Stock, Dividends, Per Share, Declared
Supplemental disclosure of Realized gains on securities:
Marketable Securities, Realized Gain (Loss) [Abstract]
Realized gains (losses) before impairments
Losses on securities with impairment
Other than Temporary Impairment Losses, Investments
Non-credit portion recognized in other comprehensive income (loss)
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest, Available-for-sale Securities
Impairment charges recognized in earnings
Total realized gains (losses) on securities
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]
Derivative Instruments, Gain (Loss) [Table]
Annuity benefits
Annuity benefits [Member]
Primary financial statement caption encompassing annuity benefits expense.
Derivative Terms [Axis]
Derivative Terms [Axis]
Derivative Terms [Axis]
Derivative Terms [Domain]
Derivative Terms [Domain]
[Domain] for Derivative Terms [Axis]
New interest rate swaps entered into during the period
New Interest Rate Swaps Entered Into During The Period [Member]
New interest rate swaps entered into during the period.
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other assets
Other Assets [Member]
Other liabilities
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Cash Flow Hedges
Cash Flow Hedging [Member]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Not Designated as Hedging Instrument
Not Designated as Hedging Instrument [Member]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Fixed-Indexed Annuities (Embedded Derivative) [Member]
Fixed-Indexed Annuities (Embedded Derivative) [Member]
Derivatives embedded in fixed-indexed annuity products
Interest rate swaps
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Carrying value of collateral received to support purchased call options
Derivative, Collateral, Right to Reclaim Cash
Total realized/unrealized gains (losses) included in net income for the embedded derivatives related to the unlocking of actuarial assumptions
Derivative, Gain (Loss) On Derivative, Annuity Unlocking
Amount of increase (decrease) in the fair value of derivatives related to unlocking of actuarial assumptions recognized in the income statement.
Number of interest rate swaps designated and qualifying as a cash flow hedges
Number of Interest Rate Derivatives Held
Notional amount of derivative instrument outstanding
Derivative, Notional Amount
Number of interest rate swaps entered into during the period
Number Of Interest Rate Swaps Entered During The Period
Number of interest rate swaps qualified as cash flows hedges entered during the period.
Net derivatives, at fair value
Derivative, Fair Value, Net
Gain (loss) reclassified from AOCI into net investment income
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Gain (loss) on cash flow hedge ineffectiveness recorded in Net Earnings
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net
Collateral receivable supporting interest rate swaps
Collateral Already Posted, Aggregate Fair Value
Total investments
Securities Investment [Member]
Fixed maturities — annuity segment
Fixed Maturities Annuity Segment [Member]
Fixed maturities, annuity segment.
Fixed maturities — all other
Fixed Maturities All Other Segments [Member]
Fixed maturities, all other segments.
Deferred policy acquisition costs — annuity segment
Deferred Policy Acquisition Costs Annuity Segment [Member]
Deferred policy acquisition costs, annuity segment.
Annuity benefits accumulated
Annuity Benefits And Other Liabilities [Member]
Annuity benefits and other liabilities.
Unearned revenue
Unearned Revenue [Member]
Unearned revenue.
Components of the net unrealized gain on securities, included in Accumulated Other Comprehensive Income
Components Of Net Unrealized Gain On Securities Included In Accumulated Other Comprehensive Income [Abstract]
Components of the net unrealized gain on securities, included in Accumulated Other Comprehensive Income.
Unrealized gain on:
Unrealized Gain On Securities Included In Accumulated Other Comprehensive Income [Abstract]
unrealized gain on securities, included in Accumulated Other Comprehensive Income.
Pretax
Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Pretax
Accumulated other comprehensive income loss available for sale securities adjustment, pretax.
Deferred Tax
Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Deferred Tax And Non controlling Interest
Accumulated other comprehensive income loss available for sale securities adjustment deferred tax and non controlling interest.
Net
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized gains (losses) on securities:
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract]
Unrealized holding gains (losses) on securities arising during the period
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Reclassification adjustment for realized gains included in net earnings
Other Comprehensive Income (Loss), Reclassification Adjustment for Realized Gains (Losses) Included in Net Income Net of Tax
Reclassification adjustment for unrealized gains or losses realized upon the sale and write-down of securities, after tax.
Total net unrealized gains (losses) on securities
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax
Net unrealized gains (losses) on cash flow hedges
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Other comprehensive income (loss), net of tax
Total comprehensive income (loss), net of tax
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Less: Comprehensive income (loss) attributable to noncontrolling interests
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive income (loss) attributable to shareholders
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Not Designated as Hedging Instrument
MBS with embedded derivatives
Mortgage Backed Securities with Embedded Derivatives [Member]
Mortgage backed securities with embedded derivatives.
Public company warrants
Warrant [Member]
Fixed-indexed and variable-indexed annuities (embedded derivative)
Fixed-Indexed and Variable-Indexed Annuities (Embedded Derivatives) [Member]
Derivatives embedded in fixed-indexed and variable-indexed annuity products
Equity index put options
Put Option [Member]
Reinsurance contracts (embedded derivative)
Other Contract [Member]
Realized gains (losses) on securities
Annuity benefits
Net investment income
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative
Derivative, Gain (Loss) on Derivative, Net
Accumulated amortization of present value of future profits
Accumulated Amortization of Present Value of Future Profits
The cumulative amount of amortization of present value of future profits that has been recognized in the Income Statement.
Liability for losses and loss adjustment expenses [Table]
Liability for Claims and Claims Adjustment Expense [Table]
Insurance Product Line [Axis]
Products and Services [Axis]
Insurance Product Line [Domain]
Products and Services [Domain]
Net increase (decrease) in the provision for claims of prior years
Other Provisions For Claims Of Prior Years [Member]
Other provisions for claims of prior years.
Liability for losses and loss adjustment expenses [Line Items]
Liability for Claims and Claims Adjustment Expense [Line Items]
Insurance Loss Reserves [Abstract]
Insurance Loss Reserves [Abstract]
Analysis of changes in the liability for losses and loss adjustment expenses, net of reinsurance
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance at beginning of year
Less reinsurance recoverables, net of allowance
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments
Net liability at beginning of year
Liability for Unpaid Claims and Claims Adjustment Expense, Net
Liability for losses and loss adjustment expenses, period increase (decrease) [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) [Abstract]
Provision for losses and LAE occurring in the current period
Current Year Claims and Claims Adjustment Expense
Net increase (decrease) in the provision for claims of prior years
Prior Year Claims and Claims Adjustment Expense
Total losses and LAE incurred
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims
Payments for losses and LAE of:
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Current year
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year
Prior years
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years
Total payments
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid
Reserves of business disposed
Liability for Unpaid Claims and Claims Adjustment Expense, Business Disposals
Amount of increase (decrease) in the cost of settling unpaid claims after deduction of reinsurance recoveries related to the disposal of a business. Includes, but is not limited to, claims which have been incurred but not reported.
Foreign currency translation and other
Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss)
Net liability at end of period
Add back reinsurance recoverables, net of allowance
Gross unpaid losses and LAE included in the balance sheet at end of period
Investments
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Contingencies
Commitments and Contingencies Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Operating Activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Amortization and Accretion, Net
Realized (gains) losses on investing activities
Realized Investment Gains (Losses)
Net sales of trading securities
Proceeds from (Payments for) Trading Securities, Short-term
Deferred annuity and life policy acquisition costs
Deferred Annuity and Life Policy Acquisition Costs
Annuity and Life additions during the period in (a) capitalized costs that vary with and are primarily related to the acquisition of new and renewal insurance contracts and coverage, and (b) capitalized present value of future profits (also known as value of business acquired).
Change in:
Increase (Decrease) in Operating Capital [Abstract]
Reinsurance and other receivables
Decrease (Increase) in Reinsurance and Other Receivables
Decrease (increase) in reinsurance, agent's balances and premiums receivable and other receivables.
Other assets
Increase (Decrease) in Other Operating Assets
Insurance claims and reserves
Increase (Decrease) in Insurance Claims and Reserves
The net change in the beginning and end of the period for unpaid losses and loss adjustment expenses, unearned premiums, and life, accident and health reserves needed to adjust net income to arrive at net cash flows provided by (used in) operating activities.
Payable to reinsurers
Increase (Decrease) in Reinsurance Payables
Other liabilities
Increase (Decrease) in Other Operating Liabilities
Managed investment entities’ assets/liabilities
Managed Investment Entities Assets And Liabilities
The increase (decrease) during the reporting period in other operating assets and liabilities of managed investment entities.
Other operating activities, net
Other Operating Activities, Cash Flow Statement
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Investing Activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of fixed maturities
Payments to Acquire Available-for-sale Securities, Debt
Purchases of equity securities
Payments to Acquire Available-for-sale Securities, Equity
Purchases of mortgage loans
Payments to Acquire Mortgage Notes Receivable
Purchases of equity index call options and other investments
Payments to Acquire Other Investments
Purchases of real estate, property and equipment
Purchases of Real Estate, Property and Equipment
The cash outflow associated with the purchase of real estate held for investment purposes and cash flows associated with the acquisition of long-lived, physical assets that are used in the normal course of business.
Proceeds from maturities and redemptions of fixed maturities
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities
Proceeds from repayments of mortgage loans
Proceeds from Sale and Collection of Mortgage Notes Receivable
Proceeds from sales of fixed maturities
Proceeds from Sale of Available-for-sale Securities, Debt
Proceeds from sales of equity securities
Proceeds from Sale of Available-for-sale Securities, Equity
Proceeds from sales and settlements of equity index call options and other investments
Proceeds from Sale and Maturity of Other Investments
Proceeds from sales of real estate, property and equipment
Proceeds From Sales Of Real Estate Property and Equipment
The cash inflow associated with the sale of real estate, property and equipment.
Managed investment entities:
Managed Investments Entities [Abstract]
Managed investments entities.
Purchases of investments
Purchases of Investments by Managed Investment Entities
The cash outflow from the purchase of investments by managed investment entities.
Proceeds from sales and redemptions of investments
Proceeds from Sales and Redemptions of Investments by Managed Investment Entities
The cash inflow associated with sales, maturities, prepayments and redemptions of investments by managed investment entities.
Other investing activities, net
Payments for (Proceeds from) Other Investing Activities
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Financing Activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Annuity receipts
Proceeds from Annuities and Investment Certificates
Annuity surrenders, benefits and withdrawals
Repayments of Annuities and Investment Certificates
Net transfers from variable annuity assets
Net Transfers From To Separate Accounts
Net transfers from (to) separate accounts related to variable annuity assets.
Additional long-term borrowings
Proceeds from Issuance of Long-term Debt
Reductions of long-term debt
Repayments of Long-term Debt
Issuances of managed investment entities’ liabilities
Proceeds From Issuance Of Managed Investment Entities
Proceeds from issuance of managed investment entities.
Retirements of managed investment entities’ liabilities
Retirement Of Managed Investment Entities Liabilities
Retirement of managed investment entities' liabilities.
Issuances of Common Stock
Proceeds from Issuance of Common Stock
Cash dividends paid on Common Stock
Payments of Ordinary Dividends, Common Stock
Other financing activities, net
Proceeds from (Payments for) Other Financing Activities
Net cash provided by financing activities
Net Cash Provided by (Used in) Financing Activities
Net Change in Cash and Cash Equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
U.S. government agency
State and municipal
Residential MBS
Commercial MBS
Corporate and other
Assets of MIE
Assets of Managed Investment Entities [Member]
Assets of managed investment entities.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial assets, Beginning Balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Total realized/unrealized gains (losses) included in Net income
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Total realized/unrealized gains (losses) included in other comprehensive income (loss)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)
Purchases and issuances
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Sales and settlements
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales
Transfer into Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Transfer out of Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Financial assets, Ending Balance
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Balance Sheet Impact of Net Unrealized Gains on Securities [Axis]
Balance Sheet Impact of Net Unrealized Gains on Securities [Axis]
Balance Sheet Impact of Net Unrealized Gains on Securities.
Balance Sheet Impact of Net Unrealized Gains on Securities [Domain]
Balance Sheet Impact of Net Unrealized Gains on Securities [Domain]
[Domain] for Balance Sheet Impact of Net Unrealized Gains on Securities.
Excluding Unrealized Gains
Excluding Unrealized Gains [Member]
Excluding Unrealized Gains.
Business Segments [Axis]
Segments [Axis]
Segment [Domain]
Segments [Domain]
P&C
Property and Casualty Insurance [Member]
Property and casualty insurance.
Annuity and Other
Annuity, Long-term Care and Life [Member]
Annuity, long-term care and life.
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Summary of deferred policy acquisition costs
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net [Abstract]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs, beginning balance
Deferred Policy Acquisition Costs
Deferred policy acquisition costs, additions
Deferred Policy Acquisition Costs, Additions
Deferred policy acquisition costs, periodic amortization
Deferred Policy Acquisition Cost, Amortization Expense, Other
Deferred policy acquisition costs, annuity unlocking
Deferred Policy Acquisition Cost, Amortization Expense, Effect of Adjustments to Estimated Gross Profit or Estimated Gross Margin
Deferred policy acquisition costs, change included in realized gains
Deferred Policy Acquisition Cost, Amortization Expense, Net Investment Gains (Losses)
Deferred policy acquisition costs, foreign currency translation
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment and Other
Deferred policy acquisition costs, ending balance
Movement in Deferred Sales Inducements [Roll Forward]
Movement in Deferred Sales Inducements [Roll Forward]
Deferred sales inducements, beginning balance
Deferred Sales Inducement Cost, Net
Deferred sales inducements, additions
Deferred Sales Inducement Cost, Addition
Deferred sales inducements, periodic amortization
Deferred Sales Inducement Cost, Amortization Expense
Deferred sales inducements, annuity unlocking
Deferred Sales Inducements, Amortization Expense, Effect of Adjustments to Estimated Gross Profit
The amount of adjustment to amortization of sales inducements arising from a revision in estimated gross profit.
Deferred sales inducements, change included in realized gains
Deferred Sales Inducements, Amortization Expense, Net Investment Gains (Losses)
The amount of amortization of deferred sales inducement costs due to realized investment gains or losses.
Deferred sales inducements, ending balance
Movement in Present Value of Future Insurance Profits [Roll Forward]
Movement in Present Value of Future Insurance Profits [Roll Forward]
Present value of future profits, beginning balance
Present Value of Future Insurance Profits, Net
Present value of future profits, periodic amortization
Present Value of Future Insurance Profits, Amortization Expense
Present value of future profits, annuity unlocking
Present Value of Future Insurance Profits, Amortization Expense, Effect of Adjustments to Estimated Gross Profit
The amount of adjustment to present value of future insurance profits arising from a revision in estimated gross profit.
Present value of future profits, ending balance
Movement in Unrealized Gains (Losses) Related to Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Movement in Unrealized Related to Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Movement in Unrealized Related to Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Unrealized investment gains (losses), beginning balance
Deferred Policy Acquisition Costs and Value of Business Acquired, Unrealized Investment Gain (Loss)
The impact of the amount of increase (decrease) in unrealized investment gains and losses on deferred policy acquisition cost (DAC) and value of business acquired.
Unrealized investment gains (losses), change in unrealized
Deferred Policy Acquisition Costs and Value of Business Acquired, Unrealized Investment Gain (Loss), Change in Unrealized
Amount of increase (decrease) in deferred policy acquisition cost (DAC) and present value of future profits due to unrealized investment gain (loss).
Unrealized investment gains (losses), ending balance
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Deferred policy acquisition costs and present value of future profits, beginning balance
Deferred policy acquisition costs and present value of future profits, additions
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Addition
Deferred policy acquisition costs and present value of future profits, periodic amortization
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization
Deferred policy acquisition costs and present value of future profits, annuity unlocking
Deferred Policy Acquisition Costs and Present Value of Future Profits, Amortization Expense, Effect of Adjustments to Estimated Gross Profit
The amount of adjustment to amortization of deferred policy acquisition costs and present value of future insurance profits arising from a revision in estimated gross profit.
Deferred policy acquisition costs and present value of future profits, change included in realized gains
Deferred Policy Acquisition Costs and Present Value of Future Profits, Amortization Expense, Net Investment Gains (Losses)
Amount of amortization of deferred policy acquisition costs and present value of future profits due to realized investment gains or losses.
Deferred policy acquisition costs and present value of future profits, foreign currency translation
Deferred Policy Acquisition Costs And Present Value Of Future Profits, Foreign Currency Translation Adjustment
Amount of increase (decrease) in deferred policy acquisition cost (DAC) and present value of future profits due to the effect of foreign currency translation.
Deferred policy acquisition costs and present value of future profits, change in unrealized
Deferred Policy Acquisition Costs and Present Value of Future Profits, Change in Unrealized Investment Gain (Loss)
Adjustment to deferred policy acquisition cost (DAC) and present value of future profits due to unrealized investment gain (loss).
Deferred policy acquisition costs and present value of future profits, ending balance
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning Balance
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held
Additional credit impairments on:
Additional Credit Impairments On Securities And Its Adjustments [Abstract]
Additional credit impairments on securities and Its adjustments.
Previously impaired securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses
Securities without prior impairments
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment
Reductions due to sales or redemptions
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold
Ending Balance
Debt Securities, Trading, and Equity Securities, FV-NI [Table]
Debt Securities, Trading, and Equity Securities, FV-NI [Table]
Disclosure of information about investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI).
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
[Line Items] for Disclosure of information about investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI).
Equity securities, at cost
Equity Securities, FV-NI, Cost
Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.
Equity securities, fair value in excess of cost
Equity Securities, FV-NI, Fair Value in Excess of Cost
Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI) in excess of the cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.
Other
Other Long-term Debt [Member]
Other Long-term Debt.
Summary of Carrying value of long-term debt
Summary Of Carrying Value Of Long Term Debt [Abstract]
Summary of Carrying value of long-term debt.
Principal
Long-term Debt, Gross
Discount and Issue Costs
Debt Issuance Costs, Net
Carrying Value
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value
Total realized/unrealized gains (losses) included in Net income
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings
Total realized/unrealized gains (losses) included in other comprehensive income (loss)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)
Purchases and issuances
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances
Sales and settlements
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements
Transfer into Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3
Transfer out of Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3
Financial liabilities, Ending Balance
Schedule of Stock by Class [Table]
Schedule of Stock by Class [Table]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Voting Preferred Stock
Voting Preferred Stock [Member]
Voting preferred stock.
Nonvoting Preferred Stock
Nonvoting Preferred Stock [Member]
Nonvoting preferred stock.
Class of Stock [Line Items]
Class of Stock [Line Items]
Preferred Stock, shares authorized
Preferred Stock, Shares Authorized
Preferred Stock, par value (in USD per share)
Preferred Stock, No Par Value
Fixed maturities, Available for sale, Amortized Cost
Fixed maturities, Available for sale, Gross Unrealized, Gains
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax
Fixed maturities, Available for sale, Gross Unrealized, Losses
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)
Available-for-sale Debt Securities, Accumulated Net Unrealized Gain (Loss), before Tax
Amount before tax of net unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.
Shareholders' Equity
Stockholders' Equity Note Disclosure [Text Block]
Components of accumulated other comprehensive income (loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Equity Components [Axis]
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest
Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member]
Accumulated Net Investment Gain (Loss) Attributable to Parent
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member]
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Noncontrolling Interest
AOCI Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, Pretax
Other Comprehensive Income (Loss), before Reclassifications, before Tax
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, tax
Other Comprehensive Income (Loss) before Reclassifications, Tax
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, net of tax
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Reclassification from accumulated other comprehensive income, pretax
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Reclassification from accumulated other comprehensive income, tax
Reclassification from AOCI, Current Period, Tax
Reclassification from accumulated other comprehensive income, net of tax
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Accumulated Other Comprehensive Income [Roll Forward]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
AOCI beginning balance
Other comprehensive income (loss), pretax
Other Comprehensive Income (Loss), before Tax
Other comprehensive income (loss), tax
Other Comprehensive Income (Loss), Tax
AOCI ending balance
Noncontrolling Interest [Abstract]
Redeemable Noncontrolling Interests
Noncontrolling Interest Disclosure [Text Block]
Assets and liabilities measured at fair value
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Unobservable inputs used by management in determining fair value of embedded derivatives
Schedule Of Embedded Derivatives Unobservable Inputs [Table Text Block]
Schedule of embedded derivatives unobservable inputs.
Changes in balances of Level 3 financial assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Changes in balances of Level 3 financial liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Fair value of financial instruments
Fair Value, by Balance Sheet Grouping [Table Text Block]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Derivatives included in AFG' s Balance Sheet at fair value
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative asset, at fair value
Derivative Asset, Fair Value, Amount Not Offset Against Collateral
Derivative liability, at fair value
Derivative Liability, Fair Value, Amount Not Offset Against Collateral
The scheduled maturities of available for sale fixed maturities
Available-for-sale Securities, Debt Maturities [Abstract]
Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
One year or less
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis
After one year through five years
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis
After five years through ten years
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis
After ten years
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis
Fixed maturities amortized cost, Subtotal
Available-for-sale Securities, Debt Maturities Excluding ABS and MBS, Amortized Cost
Available for sale securities debt maturities excluding ABS and MBS amortized cost.
ABS (average life of approximately 4-1/2 years)
Available for Sale Securities ABS Amortized Cost
Asset-backed securities, amortized cost.
MBS (average life of approximately 4-1/2 years)
Available for Sale Securities MBS Amortized Cost
Mortgage-backed securities, amortized cost.
Amortized Cost
Available-for-sale Securities, Amortized Cost Basis
Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
One year or less
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value
After one year through five years
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value
After five years through ten years
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value
After ten years
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value
Fixed maturities fair value, Subtotal
Available-for-sale Securities, Debt Maturities Excluding ABS and MBS, Fair Value
Available for sale securities debt maturities excluding ABS and MBS fair value.
ABS (average life of approximately 4-1/2 years)
Available for Sale Securities ABS Fair Value
Asset-backed securities, fair value.
MBS (average life of approximately 4-1/2 years)
Mortgage-backed Securities Available-for-sale, Fair Value Disclosure
Fair Value
Available-for-sale Securities
Fair Value Percent, Fiscal Year Maturity [Abstract]
Available For Sale Securities, Debt Maturities, Fair Value Percent, Fiscal Year Maturity [Abstract]
Available For Sale Securities, Debt Maturities, Fair Value Percent, Fiscal Year Maturity [Abstract]
One year or less
Available For Sale Securities Debt Maturities Within One Year Fair Value Percent
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value, Percent.
After one year through five years
Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Percent
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value, Percent.
After five years through ten years
Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value Percent
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value, Percent.
After ten years
Available For Sale Securities Debt Maturities After Ten Years Fair Value Percent
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value, Percent.
Fixed maturities fair value, Subtotal, Percent
Available-for-sale Securities, Debt Maturities Excluding ABS and MBS, Fair Value, Percent
Available for sale securities debt maturities excluding ABS and MBS fair value percent.
ABS (average life of approximately 4-1/2 years)
Available for Sale Securities ABS Fair Value Percent
Asset-backed securities, fair value, percent.
MBS (average life of approximately 4-1/2 years)
Available for Sale Securities MBS Fair Value Percent
Mortgage-backed securities, fair value, percent.
Fair value, Total, Percent
Available For Sale Securities Debt Maturities Fair Value Percent
Available-for-sale Securities, Debt Maturities, Fair Value, Total, Percent.
Average life of ABS
Asset-Backed Securities Average Useful Life
Asset-backed securities average useful life.
Average life of MBS
Mortgage Backed Securities Average Useful Life
Mortgage backed securities average useful life.
Fair Value Measurements
Fair Value Disclosures [Text Block]
Preferred stocks
Fixed-indexed and variable-indexed annuities (embedded derivative), majority of future years
Fixed-Indexed and Variable-Indexed Annuities (Embedded Derivative), Majority of Future Years [Member]
Derivatives embedded in fixed-indexed and variable-indexed annuities, majority of future years
Fair Value Measurements (Textual) [Abstract]
Fair Value Measurements (Textual) [Abstract]
Fair Value Measurements.
AFG's internal investment professionals
Number Of Internal Investment Professionals
Number of internal investment professionals.
Number of stocks transferred from Level 1 to Level 2
Number of Stocks Transferred from Level 1 to Level 2 During the Period
The sum of number of stocks transferred from Level 1 to Level 2 for each applicable quarter end period.
Fair Value of assets transferred from Level 1 to Level 2, during the second quarter
Fair Value, Assets, Level 1 to Level 2 Transfers, During the Period, Amount
The sum of amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2 for each applicable quarter end period.
Fair Value of assets transferred from Level 1 to Level 2, during the first six months
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount
Number of stocks transferred from Level 2 to Level 1
Number of Stocks Transferred from Level 2 to Level 1 During the Period
The sum of number of stocks transferred from Level 2 to Level 1 for each applicable quarter end period.
Fair Value of assets transferred from Level 2 to Level 1, during the second quarter
Fair Value, Assets, Level 2 to Level 1 Transfers, During the Period, Amount
The sum of amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1 for each applicable quarter end period.
Fair Value of assets transferred from Level 2 to Level 1, during the first six months
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount
Level 3 assets as a percentage of total assets measured at fair value
Level Three Asset As Percentage Of Asset Measured At Fair Value
Level Three Asset As Percentage Of Asset Measured At Fair Value.
Percentage of level 3 assets that were priced using non-binding broker quotes
Percentage Of Level Three Assets That Were Priced Using Non-Binding Broker Quotes
Percentage of level 3 assets that were priced using non-binding broker quotes.
Level 3 assets that were priced using non-binding broker quotes
Level Three Assets That Were Priced Using Non Binding Broker Quotes
Level three assets that were priced using non-binding broker quotes.
Percentage of internally developed Level 3 asset fair values to Shareholders' equity (are less than)
Percentage Of Internally Developed Level Three Assets To Shareholders Equity
Percentage of Internally Developed Level 3 Assets to Total Shareholders' Equity
Fair value of derivatives in annuity benefits accumulated measured using a discounted cash flow approach
Unobservable input surrenders used in Level 3 fair value determination
Fair value of equity securities transferred into Level 3
Life contingent annuities
Life Contingent Annuities
Financial liabilities on annuities in the payout phase that are contingent on the survival of the annuitant(s).
Subsegments [Axis]
Subsegments [Axis]
Subsegments [Domain]
Subsegments [Domain]
Specialty Property and transportation
Specialty Property And Transportation Insurance [Member]
Specialty Property and transportation.
Specialty casualty
Specialty Casualty Insurance [Member]
Specialty casualty.
Specialty financial
Specialty Financial Insurance [Member]
Specialty Financial.
Other specialty
Specialty Other Insurance [Member]
Specialty Other Insurance.
Property and Casualty Insurance
Annuity
Annuity [Member]
Annuity Operations.
Other
Corporate and Other [Member]
Total premiums earned
Net investment income
Revenues before realized gains (losses)
Revenues before Realized Gains (Losses)
Aggregate revenue (including insurance premiums, investment income and other income) recognized during the period before realized gains (losses) on securities and subsidiaries.
Accounting Policies [Table]
Schedule of Variable Interest Entities [Table]
Limited partnerships and similar investments
Limited Partner [Member]
Significant Accounting Policies [Line Items]
Variable Interest Entity [Line Items]
Available-for-sale securities, Equity securities
Available-for-sale Securities, Equity Securities
Net unrealized gain on equity securities included in AOCI
Equity securities, trading at fair value
Trading Securities, Equity
Weighted average common shares adjustment related to stock-based compensation (shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Anti-dilutive potential common shares related to stock-based compensation plans (shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Maturities of short term investments
Maturity Period Of Short Term Investment Maximum
Maturity period of short term investment maximum.
Available for sale fixed maturities
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
Equity securities reported at fair value
Marketable Securities [Table Text Block]
Available for sale securities in a continuous unrealized loss position
Schedule of Unrealized Loss on Investments [Table Text Block]
Roll forward of cumulative credit portion of other-than-temporary impairments on fixed maturity securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]
Available for sale fixed maturity securities by contractual maturity date
Investments Classified by Contractual Maturity Date [Table Text Block]
Components of the net unrealized gain on securities, included in Accumulated Other Comprehensive Income
Unrealized Gain (Loss) on Investments [Table Text Block]
Net investment income earned and investment expenses incurred
Investment Income [Table Text Block]
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized Gains (Losses) and Changes in Unrealized Appreciation (Depreciation) Related to Fixed Maturity and Equity Security Investments [Table Text Block]
Tabular disclosure of realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments.
Holding gains (losses) on equity securities still held
Holding Gains (Losses) on Equity Securities Still Held [Table Text Block]
Tabular disclosure of holding gains (losses) on equity securities still held.
Gross realized gains and losses on available for sale fixed maturity and equity security investments
Schedule of Realized Gain (Loss) [Table Text Block]
Income Tax Reconciliation [Table]
Income Tax Reconciliation [Table]
Income Tax Reconciliation.
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Tax Cuts and Jobs Act of 2017
Tax Cuts and Jobs Act of 2017 [Member]
The impact of the Tax Cuts and Jobs Act of 2017.
Income Tax Reconciliation [Line Items]
Income Tax Reconciliation [Line Items]
Income Tax Reconciliation.
Statutory rate of income taxes
Decrease in net deferred tax asset resulting from the changes in the Tax Cuts and Jobs Act of 2017
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount
Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act.
Operating loss carryforwards subject to SRLY tax rules will expire unutilized at December 31, 2018
Operating Loss Carryforwards
Derivatives included in Balance Sheet at fair value
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Summary of gain (loss) included in the Statement of Earnings for changes in the fair value of derivatives
Derivative Instruments, Gain (Loss) [Table Text Block]
Derivatives
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Long-Term Debt
Long-term Debt [Text Block]
Other lines
Other Lines [Member]
Other lines.
Real Estate Investment
Real Estate Investment [Member]
Number of segments
Number of Reportable Segments
Pretax income from the sale of real estate properties
Gain (Loss) on Sale of Properties, before Applicable Income Taxes
Write off of Deferred Debt Issuance Cost
Write off of Deferred Debt Issuance Cost
Reconciliation of income taxes at the statutory rate and income taxes shown in the Statement of Earnings
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Property and casualty insurance underwriting
Property and Casualty Insurance Underwriting Income (Loss)
Underwriting income (loss) for the property and casualty insurance segment, which is calculated as premiums earned less losses and loss adjustment expenses less commissions and other underwriting expenses.
Investment and other income, net
Investment and Other Income, Net
Net investment income plus other income less other expenses.
Earnings before realized gains (losses) and income taxes
Operating Income (Loss), Before Realized Gains (Losses) and Income Taxes
The net result for the period of deducting operating expenses from operating revenues (excluding realized gains (losses) on securities and subsidiaries) before income taxes.
Schedule of Variable Interest Entities [Table]
Variable Interest Entities [Axis]
Variable Interest Entities [Axis]
Variable Interest Entity, Classification [Domain]
Variable Interest Entity, Classification [Domain]
Variable interest entity, primary beneficiary
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Investment in CLO tranches at end of period
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount
Selected financial information related to collateralized loan obligations
Financial Information Related to Collateralized Loan Obligations [Abstract]
Financial information related to collateralized loan obligations.
Gains (losses) on change in fair value of assets/liabilities:
Gains (Losses) on Change in Fair Value of Assets/ Liabilities of Collateralized Loan Obligations [Abstract]
Gains losses on change in fair value of assets liabilities collateralized loan obligations.
Assets
Gain (Loss) on Change in Fair Value of Assets of Variable Interest Entities
Gain (loss) on change in fair value of assets of variable interest entities.
Liabilities
Gain (Loss) on Change in Fair Value of Liabilities of Variable Interest Entities
Gain (loss) on change in fair value of liabilities of variable interest entities.
Management fees paid to AFG
Management Fees Paid by Variable Interest Entities
Management fees paid by variable interest entities.
CLO earnings (losses) attributable to AFG shareholders
Earnings Losses Of Variable Interest Entities Attributable To Shareholders
Earnings (losses) of variable interest entities attributable to AFG shareholders.
Deferred Policy Acquisition Costs Details
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits Details [Table Text Block]
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits Details [Table Text Block]
Schedule of long-term debt instruments
Schedule of Long-term Debt Instruments [Table Text Block]
Subordinated Debt Obligations
Subordinated Debt Obligations [Member]
Variable Interest Entities by Classification of Entity [Axis]
New Collateralized Loan Obligation Entities
New Collateralized Loan Obligation Entities [Member]
New collateralized loan obligation entities.
Percentage of investment of most subordinate debt tranche, Minimum
Percentage of Investment of Most Subordinate Debt Tranche of Variable Interest Entity Minimum
Minimum percentage of investment of most subordinate debt tranche of variable interest entity.
Percentage of investment of most subordinate debt tranche, Maximum
Percentage of Investment of Most Subordinate Debt Tranche of Variable Interest Entity Maximum
Maximum percentage of investment of most subordinate debt tranche of variable interest entity.
Number of collateralized loan obligation entities
Number of Collateralized Loan Obligation Entities
Number of collateralized loan obligation entities.
Aggregate fair value of investment in collateralized loan obligations
Face value of liabilities issued by managed investment entities on issuance date
Face Value Of Liabilities Issued By Managed Investment Entities On Issuance Date
Face value of liabilities issued by managed investment entities.
Face amount of managed investment entities liabilities purchased by subsidiaries at issuance date
Face Amount Of Managed Investment Entities Liabilities Purchased By Subsidiaries At Issuance Date
Face amount of managed investment entities liabilities purchased by subsidiaries at issuance date.
Face amount of managed investment entities liabilities purchased by subsidiaries after issuance date
Face Amount Of Managed Investment Entities Liabilities Purchased By Subsidiaries After Issuance Date
Face amount of managed investment entities liabilities purchased by subsidiaries after issuance date.
Amount paid by subsidiaries to purchase managed investment entities liabilities after issuance date
Amount Paid By Subsidiaries To Purchase Managed Investment Entities Liabilities After Issuance Date.
Amount paid by subsidiaries to purchase managed investment entities liabilities after issuance date.
Proceeds received by subsidiaries related to sales and redemptions of managed investment entities liabilities
Proceeds Received By Subsidiaries Related to Sales and Redemptions of Managed Investment Entities Liabilities
Proceeds received by subsidiaries related to sales and redemptions of managed investment entities liabilities.
Number of collateralized loan obligation entities substantially liquidated, during the period
Number Of Collateralized Loan Obligation Entities Substantially Liquidated During The Period
Number of collateralized loan obligation entities that were substantially liquidated during the period.
Difference between aggregate unpaid principal balance and fair value of CLOs' fixed maturity investments
Difference Between Aggregate Unpaid Principal Balance And Fair Value Of Variable Interest Entity Investments
Difference between aggregate unpaid principal balance and fair value of variable interest entity investments.
Difference between aggregate unpaid principal balance and carrying value of CLOs' debt
Difference Between Aggregate Unpaid Principal Balance And Fair Value Of Variable Interest Entity Debt
Difference between aggregate unpaid principal balance and fair value of variable interest entity debt.
Carrying amount of CLO loans in default
Carrying Amount Of Variable Interest Entity Loans In Default
Carrying amount of variable interest entity loans in default.
Aggregate unpaid principal balance of CLO loans in default
Aggregate Unpaid Principal Balance Of Variable Interest Entity Loans In Default
Aggregate unpaid principal balance of variable interest entity loans in default.
Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]