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Proceeds from Sale of Debt Securities, Available-for-Sale Income Before Income Tax Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Repayments of Long-term Debt Repayments of Long-Term Debt Management Fee Expense Management Fee Expense Deferred Gain On Reinsurance Deferred Gain On Reinsurance Deferred Gain On Reinsurance Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component Equity Component [Domain] Deferred Acquisition Costs Deferred Acquisition Costs at Beginning of Period Deferred Acquisition Costs at End of Period Deferred Policy Acquisition Cost Measurement Input Type Measurement Input Type [Domain] Investment Gain (Loss) included In Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Foreign Exchange Contracts Foreign Exchange Contract [Member] Policy Loans, Fair Value 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Stockholders' Equity, Number of Shares, Par Value and Other Disclosure [Abstract] Policy Charges Policyholder Account Balance, Policy Charge Weighted Average Weighted Average [Member] All Adjustments to Compensation All Adjustments to Compensation [Member] Net Cash Provided (Used) by Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 [Member] Future Policy Benefits Liability for Future Policy Benefit, before Reinsurance Securities Received as Collateral Securities Received as Collateral Income Statement [Abstract] Income Statement [Abstract] Stockholders' Equity Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Weighted average duration of the liability Liability for Future Policy Benefit, Weighted-Average Duration Net Investment Loss Net Investment Loss Net Investment Loss Net Investment Gain (Loss) Gain (Loss) on Investments Deferred Income Tax Assets, Net Deferred Income Tax Assets, Net Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Reinsurance Recoverable (net of allowance for credit losses of $0.4; $1.4) Reinsurance Recoverable Reinsurance Recoverables, Including Reinsurance Premium Paid Significant Transaction Significant Transaction [Axis] Significant Transaction City Area Code City Area Code Amortization of Prior Service Credit Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses Private Equity Fund Type Private Equity Fund Type [Domain] [Domain] for Private Equity Fund Type [Axis] Other Property Other Property [Member] Derivative Purpose [Domain] Derivative Purpose [Domain] Derivative Purpose [Domain] Name Forgone Recovery, Individual Name Heirarchy Level Combination Heirarchy Level Combination [Domain] [Domain] for Heirarchy Level Combination [Axis] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Redemption Term Redemption Term [Axis] Disclosure of information about partnership equity securities with redemption features. [Axis] Issued Shares of Preferred Stock Preferred Stock, Shares Issued Disclosure Mortgage Loans by Property Type [Abstract] Disclosure Mortgage Loans by Property Type [Abstract] Disclosure - Mortgage Loans by Property Type [Abstract] Change in Net Loss on Derivatives, tax expense (benefit) Other Comprehensive Income (Loss), Net Gain on Derivatives, Adjustment, Tax Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of hedges. Policyholder Account Balance [Table] Policyholder Account Balance [Table] Amortization of Prior Service Credit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Net policyholders' account balances, after reinsurance recoverable Policyholder Account Balance, After reinsurance recoverable Policyholder Account Balance, After reinsurance recoverable Financing Receivable, Credit Quality Indicator, Mortgage Loans Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Mortgage Loans, Fair Value Disclosure Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Policyholder Account Balance, Guaranteed Minimum Credit Rating Policyholder Account Balance, Guaranteed Minimum Credit Rating Net Sales and Maturities (Purchases) of Short-term Investments Payments for (Proceeds from) Short-Term Investments West South Central West South Central [Member] West South Central [Member] Net liability for future policy benefits, after reinsurance recoverable Liability for Future Policy Benefit, after Reinsurance NEW YORK STOCK EXCHANGE, INC. NEW YORK STOCK EXCHANGE, INC. 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[Member] Cash Cash [Member] Amortized Cost and Fair Values of Securities by Security Type Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Current discount rate Liability for Future Policy Benefit, Current Weighted-Average Discount Rate Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative Derivative [Line Items] Change in Fair Value as of Vesting Date of Prior Year Equity Awards 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Reconciliation, Transfers into Level 3 Component of Derivative Gain (Loss) Excluded from the Assessment of Hedge Effectiveness Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net Unfunded Mortgage Loan Commitments Unfunded Mortgage Loan Commitments [Member] Unfunded Mortgage Loan Commitments Common Class A Common Class A [Member] Negative Ceding Commission Negative Ceding Commission Negative Ceding Commission Entity Interactive Data Current Entity Interactive Data Current Effects of Reinsurance Effects of Reinsurance [Line Items] Pacific Pacific [Member] Pacific [Member] Fixed Maturity Securities Available-for-Sale Securities [Member] Entity Small Business Entity Small Business Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unearned Premiums Unearned Premiums Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred Securities Loaned, Including Not 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Fair Value Short-term Investments Other Short-Term Investments Income Before Income Tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and Contingent Liabilities - Note 13 Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Axis] Policyholders' Account Balances Policyholder Account Balance Executive Category: Executive Category [Axis] Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Reinsurance Reinsurance [Text Block] Liabilities Offsetting Securities Borrowed in Balance Sheet Security Borrowed, Subject to Master Netting Arrangement, Liability Offset Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Present Value of Expected Net Premiums, Balance at beginning of year Present Value of 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[Axis] Outstanding Restricted Stock Unit Grant Prices Lower Limit Outstanding Restricted Stock Unit Grant Prices Lower Limit Outstanding Restricted Stock Unit Grant Prices Lower Limit Benefit payments Policyholder Account Balance, Benefit Payment Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Accident, Sickness, and Disability Accident and Health Insurance Product Line [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] External Credit Rating, Investment Grade External Credit Rating, Investment Grade [Member] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Derivative Purpose [Axis] Derivative Purpose [Axis] Derivative Purpose Heirarchy Level Combination Heirarchy Level Combination [Axis] Heirarchy Level Combination [Axis] Fair Value, Measurement Frequency Measurement Frequency [Domain] Compensation Expense Labor and Related Expense Cash surrender value Policyholder Account Balance, Cash Surrender Value Location and Fair Values of Derivative Financial Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic Earnings Per Share, Basic Measurement Input Type Measurement Input Type [Axis] Originated Five or More Years before Last Fiscal Year Originated Five or More Years before Last Fiscal Year [Member] Originated Five or More Years before Last Fiscal Year Insider Trading Arrangements [Line Items] Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] Derivative Instruments Not Designated as Hedging 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Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Miscellaneous Long-Term Investments Miscellaneous Long-Term Investments, Carrying Value Miscellaneous Long-Term Investments, Carrying Value Insurance [Abstract] Insurance [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Effect of changes in cash flow assumptions Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change Equity Awards Adjustments Equity Awards Adjustments [Member] Hedging Relationship Hedging Relationship [Domain] Fair Value, Balance Sheet Grouping, Financial Statement Captions Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Accelerated Share Repurchases, Date Accelerated Share Repurchases, Date [Domain] Fair Value Maturity Distribution [Abstract] Fair Value Maturity Distribution [Abstract] Fair Value Maturity Distribution [Abstract] Ceded Policy Loans Policy Loans Ceded to Reinsurers Loans ceded to reinsurers. These loans use insurance policy funds such as cash surrender values as collateral. Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Short-term Investments Short-Term Investments [Member] Authorized Shares of Preferred Stock Preferred Stock, Shares Authorized Private Equity Fund Type Private Equity Fund Type [Axis] Private Equity Fund Type [Axis] Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss Transfer of Certain Financial Assets Accounted for as Secured Borrowings Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Forward Benchmark Interest Rate Lock Forward Benchmark Interest Rate Lock [Member] Forward Benchmark Interest Rate Lock Share Repurchase Program Share Repurchase Program [Axis] Hedging Designation Hedging Designation [Domain] Class of Stock Class of Stock [Domain] Location and Fair Values of Derivative Financial Instruments [Abstract] Location and Amounts of Derivative Financial Instruments [Abstract] Disclosure - Location and Amounts of Derivative Financial Instruments [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Foreign Exchange Forward Foreign Exchange Forward [Member] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 Securities Borrowed Net of Collateral Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Other, Net Other Noncash Income (Expense) Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances [Line Items] [Line Items] for Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances [Table] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Debt Securities, Available-for-sale, Allowance for Credit Loss Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table] Interest Rate Derivative Contract Type Interest Rate Derivative Contract Type [Domain] Interest Rate Derivative Contract Type [Domain] Retirement Plan Type Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category Securities Received as Collateral on Securities Borrowed Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Foreign Exchange Contracts Currency Swap [Member] Credit Exposure Credit Exposure [Axis] Credit Exposure [Axis] Basis of Presentation Basis of Accounting [Text Block] Proceeds from Policyholder Account Deposits Additions to Contract Holders Funds Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] BB Credit Rating BB Credit Rating [Member] BB Credit Rating [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investment Gains and Losses Reported in Consolidated Statements of Income Gain (Loss) on Securities [Table Text Block] Change in Unrealized Gain (Loss) on Securities Held at the End of Period Included in Earnings Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice Quarterly after 5.5 year lock with 90 days notice [Member] Quarterly after 5.5 year lock with 90 days notice Gross Investment Income, Operating Gross Investment Income, Operating Derivative Liabilities Net Derivative Liabilities Reported in Balance Sheet Derivative Liability Entity Address, Address Line One Entity Address, Address Line One Total Benefits and Expenses Benefits, Losses and Expenses Benefits, Losses and Expenses Line of Credit Facility, Fair Value of Amount Outstanding Line of Credit Facility, Fair Value of Amount Outstanding Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net of Allowance for Credit Losses Total Income Tax Expense Income Tax Expense (Benefit) Income Tax Expense (Benefit) Fair Value Hedging Fair Value Hedging [Member] Present value of expected future policy benefits, beginning of year Balance, end of period Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change Offsetting Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Originated Four Years before Last Fiscal Year Originated Four Years before Last Fiscal Year [Member] Originated Four Years before Last Fiscal Year Accounting Developments Accounting Standards Update and Change in Accounting Principle [Text Block] Fixed maturity securities in unrealized loss position percent of total Fixed maturity securities in unrealized loss position percent of total This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities expressed as a percentage. Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Statement Statement [Table] Public Utilities Public Utility, Bonds Public Utility, Bonds [Member] Originated Three Years before Last Fiscal Year Originated Three Years before Last Fiscal Year [Member] Originated Three Years before Last Fiscal Year Derivative Instruments and Hedging Activities Disclosures Derivative Instruments and Hedging Activities Disclosures [Line Items] Cash Received as Collateral on Securities Borrowed Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Derivative Asset, Fair Value, Gross Asset Asset Derivatives Fair Value Derivative Asset, Subject to Master Netting Arrangement, before Offset Expected future gross premiums Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance Policyholder Account Balance [Roll Forward] Policyholder Account Balance [Roll Forward] Derivatives Measured with Unobservable Inputs, Beginning Balance Derivatives Measured with Unobservable Inputs, Ending Balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Other Long-term Investments Other Long-Term Investments [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]