Balance as of beginning-of-year Balance as of end-of-period Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change Origination Year Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] Transfers Into or Out of Level 3, Net Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers, Net Debt Securities, Available-for-Sale Debt Securities, Available-for-Sale [Table Text Block] Policyholder account balances – certain investment contracts Policyholder Account Balances And Other Liabilities [Member] Policyholder Account Balances And Other Liabilities Deferred sales inducements, amortization expense Amortization Deferred Sales Inducements Net Amortization Expense Other Amortization Net Of Interest The amount of other amortization of deferred sales inducement costs, net of interest, during the period. Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Credit contracts Credit Risk Contract [Member] Tabular List, Table Tabular List [Table Text Block] AA- Standard & Poor's, AA- Rating [Member] Future Adoption of Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Deferred compensation mark-to-market adjustment, before tax Other Non Operating Adjustments, Deferred Compensation Mark-To-Market Adjustment, Before Tax Other Non Operating Adjustments, Deferred Compensation Mark-To-Market Adjustment, Before Tax Measurement Basis [Axis] Measurement Basis [Axis] Six months or greater, but less than nine months Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Six To Nine Months, Accumulated Loss Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for more than six months, but less than nine. Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Fannie Mae Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Dividends paid to preferred stockholders Payments of Ordinary Dividends, Preferred Stock and Preference Stock Stock, Class of Stock [Table] Stock, Class of Stock [Table] Minimum consolidated net worth requirement Banking Regulation, Mortgage Banking, Net Worth, Minimum Policyholder Account Balance [Roll Forward] Policyholder Account Balance [Roll Forward] Interest accrual Liability for Future Policy Benefit, Expected Net Premium, Interest Income Estimated insurance recoveries Estimated Insurance Recoveries Excess cash collateral pledged Excess Cash Collateral Pledged Excess Cash Collateral Pledged Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk Concentration Risk, Percentage 1-50 Basis Points Above Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 [Member] Principles of Consolidation Consolidation, Policy [Policy Text Block] Embedded derivative asset, measurement input Embedded Derivative Asset, Measurement Input Employee Stock Option Share-Based Payment Arrangement, Option [Member] Realized gain (loss) Realized (gain) loss Total realized gain (loss) Debt and Equity Securities, Realized Gain (Loss) Common stock dividends declared Dividends, Common Stock, Cash Total stockholders’ equity Balance as of beginning-of-year Balance as of end-of-period Equity, Attributable to Parent Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements This item represents the percentage of the fair value of securities obtained as collateral under reverse repurchase agreements Common stock - authorized (in shares) Common Stock, Shares Authorized Investments [Line Items] Investments [Line Items] Investments [Line Items] Credit loss-related adjustments, pre-tax Credit Loss-Related Adjustments, Before Tax Credit Loss-Related Adjustments, Before Tax Variable Annuities Variable Annuity [Member] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Debt, Long-Term And Short-Term [Roll Forward] Debt, Long-Term And Short-Term [Roll Forward] Debt, Long-Term And Short-Term Cover [Abstract] Less than six months Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Less Than Six Months This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than six months. Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Effect of cumulative changes in discount rate assumptions AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax Benefits and policyholder liability remeasurement (gain) loss Policyholder Benefits And Claims Incurred, Net And Liability For Future Policy Benefit, Remeasurement Gain (Loss) Policyholder Benefits And Claims Incurred, Net And Liability For Future Policy Benefit, Remeasurement Gain (Loss) Total Debt Securities, Available-for-Sale, Unrealized Loss Position Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Number of partnerships in alternative investment portfolio Number Of Partnerships In Alternative Investment Portfolio Number of partnerships represented in alternative investment portfolio. Summary of Gross Premiums and Interest Accretion Summary Of Gross Premiums And Interest Accretion [Table Text Block] Summary of gross premiums and interest accretion [Table Text Block]. Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Changes in unrealized gains (losses) included in net income Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Debt Instrument [Line Items] Debt Instrument [Line Items] Investment commitments for private placements Investment Commitments Limited Private Placements This item represents investment commitments as of the balance sheet date for private placements. Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Balance as of beginning-of-year Balance as of end-of-period Debt, Long-Term and Short-Term, Combined Amount Balance as of beginning-of-year, excluding shadow balance in AOCI Balance as of end-of-year, excluding shadow balance in AOCI Liability For Future Policy Benefits, Excluding Shadow Balance In AOCI Liability For Future Policy Benefits, Excluding Shadow Balance In AOCI Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] External Credit Rating, Standard & Poor's [Domain] External Credit Rating, Standard & Poor's [Domain] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other Assets Other Assets [Member] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Liquidity/Duration Adjustment Measurement Input Liquidity Duration Adjustment [Member] Measurement Input, Liquidity/Duration Adjustment [Member] Income (loss) before taxes Income (loss) before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Cash collateral Derivative Liability, Subject To Master Netting Arrangement, Collateral, Right To Reclaim Cash Not Offset, Excluding Excess Cash Collateral Pledged Derivative Liability, Subject To Master Netting Arrangement, Collateral, Right To Reclaim Cash Not Offset, Excluding Excess Cash Collateral Pledged Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Net balance as of end-of-period, net of reinsurance Liability for Future Policy Benefit, after Reinsurance Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Unrealized gains (losses) included in OCI, net Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Letter of Credit Letter of Credit [Member] Deferred Policy Acquisition Cost [Line Items] Deferred Policy Acquisition Cost [Line Items] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Total Reserves Associated With Modified Coinsurance The amount of investments in support of reserves associated with modified coinsurance reinsurance arrangements for portions of the Company's deferred annuity business. Insurance premiums Premiums Earned, Excluding Insurance Commissions And Fees, Net Premiums Earned, Excluding Insurance Commissions And Fees, Net Disclosure of Variable Interest Entities Assets and Liabilities [Table] Disclosure Of Variable Interest Entities Assets And Liabilities [Table] Disclosure of the assets and liabilities of consolidated variable interest entities, including the number of instruments held, notional amounts, and carrying value. Federal Home Loan Mortgage Corporation Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Document Fiscal Period Focus Document Fiscal Period Focus Funding Agreement Backed Notes Program Funding Agreement Backed Notes Program [Member] Funding Agreement Backed Notes Program Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Fair Value Option Fair Value Option, Disclosures [Table Text Block] Award Timing Method Award Timing Method [Text Block] Award Type Award Type [Axis] Foreign Currency Translation Adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Payables for collateral on investments Total payables for collateral on investments Deposits Received for Securities Loaned, at Carrying Value Reinsurance recoverable amortization Reinsurance Recoverable For Unpaid Claims And Claims Adjustments, Amortization Reinsurance Recoverable For Unpaid Claims And Claims Adjustments, Amortization Stock compensation/issued for benefit plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Market risk benefit liabilities Liabilities Market risk benefit liabilities Market Risk Benefit, Liability, Amount Entity Address, City or Town Entity Address, City or Town Percentage of fair value rated as investment grade Available For Sale Securities Fair Value Disclosure Percent Investment Grade Percentage of the fair value of portfolio that was rated investment grade as of balance sheet date. Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for AFS Securities Collateral Obtained, Percent Of Fair Value Of Available-For-Sale Securities This item represents the percentage of the fair value of AFS securities obtained as collateral pledged. Fixed maturity AFS securities: Debt Securities, Available-for-Sale, Gain (Loss) [Abstract] Repayment (issuance) of policy loans, net Payments for (Proceeds from) Policy Loans Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Income Statement and Other Comprehensive Income Location [Domain] Statement of Income Location, Balance [Domain] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Investments Invested Assets [Member] Invested Assets [Member] Policyholder Account Balance [Abstract] Policyholder Account Balance [Abstract] Collateral Posted to Counterparty Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Market Risk Benefit Non-Performance Risk Gain (Loss) AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent [Member] Unamortized debt issuance costs Debt Issuance Costs, Net Common stock - outstanding (in shares) Balance as of beginning-of-year (in shares) Balance as of end-of-period (in shares) Common Stock, Shares, Outstanding Impact on net premiums, policyholder behavior Liability For Future Policy Benefit, Expected Net Premium, Policyholder Behavior Liability For Future Policy Benefit, Expected Net Premium, Policyholder Behavior Insurance [Abstract] Six months or greater, but less than nine months Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Six To Nine Months This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for more than six months, but less than nine. Legal accruals Legal Fees Expected future benefit payments Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance Schedule of Common Stock Outstanding Roll Forward Schedule of Common Stock Outstanding Roll Forward [Table Text Block] DAC, VOBA, DSI and DFEL DAC, VOBA, DSI And DFEL [Text Block] This element may be used to encapsulate the entire disclosure, including data and tables, pertaining to the nature and amount of capitalized costs incurred to write or acquire insurance contracts or the purchase of a life insurance company, amounts such as interest credited and bonuses given to motivate purchases of insurance products, and front-end charges that are deferred and amortized into income over the life of insurance contracts. Reinsurance Agreement Reinsurance Agreement [Member] Reinsurance Agreement [Member]. Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Outstanding derivative instruments with off-balance-sheet risks Derivative, Fair Value, Net [Abstract] Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Federal income tax expense (benefit) Total federal income tax expense (benefit) Income Tax Expense (Benefit) Trading securities Trading Assets, Excluding Debt and Equity Securities [Member] Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Reinsurance-related embedded derivatives Reinsurance Related Embedded Derivatives [Member] Line item in the statement of financial position in which the fair value amounts of the derivative instruments are included. Other assets Other Assets Credit Rating, Standard & Poor's [Axis] Credit Rating, Standard & Poor's [Axis] Interest credited Policyholder Account Balance, Interest Expense Document Information [Line Items] Document Information [Line Items] Preferred stock - issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Qualifying Hedges Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Separate Account Asset Category [Axis] Separate Account Asset Category [Axis] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Federal income tax accruals Increase (Decrease) in Income Taxes 11 - 30 Years Remaining Life 11 To 30 Years Total notional amounts of derivative financial instruments maturing in 11 - 30 years. All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] MRBs Market Risk Benefit [Text Block] Market Risk Benefit [Text Block]. Commitments and Contingencies Disclosure [Abstract] Net change in collateral on investments, certain derivatives and related settlements Net Change In Collateral On Investments, Derivatives And Related Settlements Net Change In Collateral On Investments, Derivatives And Related Settlements Beginning balance at original discount rate Ending balance at original discount rate Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance Reinsurance-related Reinsurance Related [Member] We have certain modified coinsurance arrangements and coinsurance with funds withheld reinsurance arrangements with embedded derivatives related to the withheld assets of the related funds. These derivatives are considered total return swaps with contractual returns that are attributable to various assets and liabilities associated with these reinsurance arrangements. Securities pledged under securities lending agreements Securities pledged under securities lending agreements Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred Year three Debt-Service Coverage Ratio, Year Three, Originated, Two Years Before Current Fiscal Year Debt-Service Coverage Ratio, Year Three, Originated, Two Years Before Current Fiscal Year Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Year four Debt-Service Coverage Ratio, Year Four, Originated, Three Years Before Current Fiscal Year Debt-Service Coverage Ratio, Year Four, Originated, Three Years Before Current Fiscal Year Impact on future policy benefits, policyholder behavior Liability for Future Policy Benefit, Expected Future Policy Benefit, Policyholder Behavior Liability for Future Policy Benefit, Expected Future Policy Benefit, Policyholder Behavior Debt term Debt Instrument, Term LTV 65% to 75% Loan To Value Ratio Sixty Five To Seventy Five [Member] Loan To Value Ratio Sixty Five To Seventy Five [Member] Fixed maturity available-for-sale securities, at fair value (amortized cost: Fair Value Total fixed maturity AFS securities Fixed maturity AFS securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Fair value, concentration of risk, investments Fair Value, Concentration of Risk, Investments Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Balance as of beginning-of-year Balance as of end-of-period Deferred Sale Inducement Cost Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Separate Account Asset Category [Domain] Separate Account Asset Category [Domain] Gross amount of recognized liabilities Derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Equity Components [Axis] Equity Components [Axis] Year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Summary of Balances of Changes in Net MRB (Assets) Liabilities Market Risk Benefit, Activity [Table Text Block] Derivative Counterparties Derivative Counterparties [Member] Derivative Counterparties [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Realized gain (loss) on other non-financial assets Gains (Losses) On Other Non-Financial Assets, Sale Of Subsidiaries Or Businesses Gains (Losses) On Other Non-Financial Assets, Sale Of Subsidiaries Or Businesses Net amount at risk Policyholder Account Balance, Net Amount at Risk Deferred front end loads, amortization expense Amortization Deferred Front End Loads Amortization Expense Other Amortization Net Of Interest The amount of other amortization of deferred front end loads, net of interest, during the period. Unamortized discounts Debt Instrument, Unamortized Discount (Premium), Net Summary of Balances and changes in Separate Account Liabilities Separate Account, Liability [Table Text Block] Fair Value, Concentration of Risk, Disclosure Items [Domain] Fair Value, Concentration of Risk, Disclosure Items [Domain] DSI Deferred Sales Inducements Disclosure [Table Text Block] This element may be used as a single block of text to encapsulate the entire disclosure, including data and tables, pertaining to the nature and amount of deferred sales inducements associated with insurance contracts. Common stock issued for benefit plans Common Stock Issued For Benefit Plans The cash outflow associated with the amount paid from the deferred compensation plan during the period. This element represents the cash outflow reported in the enterprise's financing activities. Sponsored Investment Funds Sponsored Investment Funds [Member] Sponsored Investment Funds Benefits Policyholder Benefits and Claims Incurred, Net Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Entity Address, State or Province Entity Address, State or Province Net Investment Income Net Investment Income [Member] Net Investment Income [Member] Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table] Total assets pledged as collateral Financial Instruments, Owned, at Fair Value Fair value Mortgage loans on real estate Loans Receivable, Fair Value Disclosure Individual: Individual [Axis] Financial Service Financial Service [Member] Less Than 1 Year Remaining Life Less Than 1 Year Total notional amounts of derivative financial instruments maturing in less than 1 year. Separate account assets Separate Account Asset Dividends paid to common stockholders Payments of Ordinary Dividends, Common Stock Carrying value Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Ceded Credit Risk [Table] Ceded Credit Risk [Table] Operating Segments and Corporate Non Segment Operating Segments And Corporate Non Segment [Member] Operating Segments And Corporate Non Segment Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Income tax benefit (expense) related to the above pre-tax items Income Tax Benefit (Expense), Miscellaneous, Before Tax Income Tax Benefit (Expense), Miscellaneous, Before Tax Maturities Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Maturities Represents decreases to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to maturities of investments during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value. Payment of long-term debt, including current maturities Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Fair Value Decline, Greater Than 20% Fair Value Decline Greater Than Twenty Percent [Member] Fair Value Decline, Greater Than Twenty Percent [Member] Average deferred compensation shares (in shares) Average Deferred Compensation Shares The deferred compensation plans allow participants to invest in LNC stock. The weighted average number of deferred compensation shares to be included in earnings per share calculations is calculated using an arithmetical mean of our deferred compensation shares outstanding during the period. Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract] Excess non-cash collateral pledged Excess Non Cash Collateral Pledged Excess Non Cash Collateral Pledged Hybrid and redeemable preferred securities Hybrid And Redeemable Preferred Securities [Member] This category includes information about securities with both debt and equity characteristics as well as preferred stock that may be redeemed at a predetermined time and/or price. Flooring impact of LFPB Liability for Future Policy Benefit, Expected Net Premium, Derecognition Net assessments collected Liability For Future Policy Benefit, Expected Future Policy Benefit, Net Assessments Collected Liability For Future Policy Benefit, Expected Future Policy Benefit, Net Assessments Collected International International Equity Fund [Member] International Equity Fund Movement in Deferred Sales Inducements [Roll Forward] Movement in Deferred Sales Inducements [Roll Forward] Fixed Annuities Fixed Annuity [Member] Structured securities (RMBS, CMBS, ABS) Structured Securities [Member] Structured securities (ABS, MBS, CLOs) Year one Debt-Service Coverage Ratio, Current Fiscal Year Debt-Service Coverage Ratio, Current Fiscal Year Effect of changes in interest rates Market Risk Benefit, Increase (Decrease) from Interest Rate Change Series D Preferred Stock Series D Preferred Stock [Member] Entity Central Index Key Entity Central Index Key Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Deferrals Deferred Policy Acquisition Cost, Capitalization PEO Name PEO Name Mortgage loans on real estate, net of allowance for credit losses Receivables, Fair Value Disclosure [Abstract] Total revenues Revenues Non-Qualifying Hedges Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Ceded deferred front end loads Less: reinsurance recoverables Ceded Deferred Front End Loads Ceded Deferred Front End Loads Financing Receivable Credit Quality Indicators Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Unamortized adjustments from discontinued hedges Unamortized Adjustments From Discontinued Hedges Unamortized Adjustments From Discontinued Hedges Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Policyholder Account Balance Policyholder Account Balance [Text Block] Policyholder Account Balance Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Future contract benefits Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Debt-to-Value [Domain] Debt-to-Value [Domain] 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] Non-performance risk adjustment Non-Performance Risk Adjustment Credit, or nonperformance, risk adjustment associated with credit loss in the event of nonperformance by our counterparties on various derivative contracts. Total expenses Benefits, Losses and Expenses Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Investments [Domain] Investments [Domain] Amortized cost of the hedged liabilities Fair Value Hedge Liabilities Securities Investment Securities Investment [Member] Loans and Leases Receivable Disclosure [Line Items] Loans and Leases Receivable Disclosure [Line Items] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Sales and repayments of other investments Proceeds from Sale and Maturity of Other Investments Net annuity product features, pre-tax Net Annuity Product Features, Before Tax Net Annuity Product Features, Before Tax Other Liabilities Other Liabilities [Member] A- Standard & Poor's, A- Rating [Member] Fair Value as of Grant Date Award Grant Date Fair Value Maturity of the notional amounts of derivative financial instruments Derivative Instrument Detail [Abstract] Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Current discount rate Liability for Future Policy Benefit, Current Weighted-Average Discount Rate Money market funds Separate Account, Money Market Fund [Member] Separate Account, Money Market Fund Summary of Policyholder Account Balances by Range Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table Text Block] Incremental common shares from assumed exercise or issuance of stock-based incentive compensation awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Credit loss benefit (expense) on reinsurance-related assets Reinsurance Recoverable, Credit Loss Expense (Reversal) Market Risk Benefit [Line Items] Market Risk Benefit [Line Items] Amortized cost of the hedged assets Fair Value Hedge Assets Document Quarterly Report Document Quarterly Report Less Than or Equal to Twelve Months Nine months or greater, but less than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Policyholder liability discount rate remeasurement gain (loss) OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, Tax, Parent Long-term debt Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Amortized Cost of Mortgage Loans on Real Estate on Nonaccrual Status Financing Receivable, Nonaccrual [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] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Accounting Standards Update and Change in Accounting Principle [Abstract] Accrued investment income Accrued Investment Income Receivable Investment Type [Axis] Investment Type [Axis] Total investments Investments Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Balance as of beginning-of-year Balance as of end-of-period Present Value of Future Insurance Profits, Net Additions (reductions) for securities for which credit losses were previously recognized Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal) Non-PEO NEO Non-PEO NEO [Member] Letter of credit Letters of Credit Outstanding, Amount Credit Loss Expense Incurred Schedule Of Available For Sale Debt Securities, Credit Losses Recognized In Earnings [Table Text Block] Schedule Of Available For Sale Debt Securities, Credit Losses Recognized In Earnings [Table Text Block] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] A+ Standard & Poor's, A+ Rating [Member] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Schedule of Offsetting Assets Offsetting Assets [Table Text Block] All Award Types Award Type [Domain] Embedded derivative liability Embedded Derivative, Fair Value of Embedded Derivative Liability Cash surrender value Separate Account, Liability, Cash Surrender Value, Amount Deferred units of LNC stock in our deferred compensation plans Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units Equity Awards Adjustments Equity Awards Adjustments [Member] Greater Than 90 Days Maturity Greater than 90 Days [Member] Other Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other revenues Other Income Compensation Amount Outstanding Recovery Compensation Amount Derivative liabilities, net Derivative Financial Instruments, Liabilities [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Foreign currency contracts Foreign Exchange Contract [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Adjusted balance as of beginning-of-year Adjusted balance as of beginning-of-year Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change Performing Performing Financial Instruments [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Net amount of assets Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Weighted-average age of policyholders (years) Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age Total gross secured borrowings Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement Loans with fair value option in non-accrual, amortized cost Fair Value, Option, Loans Held As Assets, Amortized Cost, Aggregate Amount In Nonaccrual Status Fair Value, Option, Loans Held As Assets, Amortized Cost, Aggregate Amount In Nonaccrual Status Components of the Transfers In and Out of Level 3 Fair Value Assets And Liabilities Transfers In And Out Of Level 3 [Table Text Block] Presentation in tabular form of the components of the transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs). Revenues Revenues [Abstract] Additions from purchases of PCD debt securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date SOFR Due 2031 SOFR Due 2031 [Member] SOFR Due 2031 Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Liability for Future Policy Benefit, Activity Liability for Future Policy Benefit, Activity [Table Text Block] Deposit assets, net of allowance for credit losses Deposit Assets Twelve months or greater Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Schedule of Assets Pledged as Collateral Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Accrued investment income Increase (Decrease) in Accrued Investment Income Receivable Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Payment related to certain financing arrangements Payments For Financing Leases And Other, Financing Activities Payments For Financing Leases And Other, Financing Activities Deferrals Deferred Sale Inducement Cost, Capitalization Financial Instruments [Domain] Financial Instruments [Domain] 6 - 10 Years Remaining Life 6 To 10 Years Total notional amounts of derivative financial instruments maturing in 6 - 10 years. Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Schedule of Increase (Decrease) in Payables for Collateral on Investments Schedule Of Increase (Decrease) In Payables For Collateral On Investments [Table Text Block] Schedule of increase (decrease) in payables for collateral on investments. Six months or greater, but less than nine months Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Six To Nine Months, Number Of Positions Number of investment positions in available-for-sale investments in a continuous unrealized loss position for more than six months but less than nine, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. Net amount Derivative Asset, Subject to Master Netting Arrangement, after Offset and Deduction Minimum Minimum [Member] Adjusted balance as of beginning-of-year Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change Company Selected Measure Name Company Selected Measure Name U.S. government bonds US Government Debt Securities [Member] 9.000% Non-Cumulative Preferred Stock, Series D Nine Zero Zero Zero Percent Non Cumulative Preferred Stock Series D [Member] 9.000% Non-Cumulative Preferred Stock, Series D. Fair Value Measurement [Domain] Fair Value Measurement [Domain] Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Net income (loss) per share: Earnings Per Share, Basic And Diluted EPS [Abstract] Earnings Per Share, Basic And Diluted EPS Effect of actual variances from expected experience Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net income (loss) available to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Policyholder Liability Discount Rate Remeasurement Gain (Loss) AOCI, Liability for Future Policy Benefit, Parent [Member] Stockholders' Equity Note [Abstract] Fixed maturity AFS securities Separate Account, Debt Security [Member] Contingencies and Commitments Commitments and Contingencies Disclosure [Text Block] Present Value of Expected Future Policy Benefits Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] Change in foreign currency exchange rate adjustment AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Change In Foreign Currency Exchange Rate, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Change In Foreign Currency Exchange Rate, Parent Weighted-average shares, as used in diluted calculation (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Reporting Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Liability for Future Policy Benefit, Activity [Line Items] Liability for Future Policy Benefit, Activity [Line Items] Retirement Plan Services Retirement Plan Services Segment [Member] Retirement Plan Services segment provides employer-sponsored variable and fixed annuities, defined benefit, individual retirement accounts and mutual-fund based programs in the retirement plan marketplaces. Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Commissions and other expenses Other Cost and Expense, Operating Increase (decrease) in MRBs Market Risk Benefit, Period Increase (Decrease) Preferred stock - outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Preferred stock Preferred Stock, Value, Outstanding Underlying Securities Award Underlying Securities Amount Gross gains Debt Securities, Available-for-Sale, Realized Gain Notional/Par Amounts Variable Interest Entity, Primary Beneficiary, Maximum Loss Exposure, Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Federal Income Taxes Income Tax Disclosure [Text Block] Interest accrual Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Policy loans Policy Loans [Member] Document Type Document Type (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position [Abstract] Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Policy loans Loans, Gross, Insurance Policy Reinsurance recoverables on unpaid losses Reinsurance Recoverables on Unpaid Losses, Gross Ceded Credit Risk, Reinsurer [Domain] Reinsurer, Name [Domain] Derivative investments Derivative Assets, Excluding Embedded Derivatives, Fair Value Derivative Assets, Excluding Embedded Derivatives, Fair Value Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] Statistical Measurement [Axis] Statistical Measurement [Axis] Loss contingency accrual Loss Contingency Accrual Securities pledged under securities lending agreements Increase (Decrease) In Cash Collateral For Securities Lending Agreements The net change during the reporting period in the amount of cash that is received related to securities pledged under securities lending agreements. Lapse Measurement Input, Lapse Rate [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash and invested cash Separate Account, Cash and Cash Equivalents [Member] Benefit payments Market Risk Benefit, Benefit Payment Change in Our Unrealized Gain on Derivative Instruments in AOCI Change In Our Unrealized Gain On Derivative Instruments In Accumulated Other Comprehensive Income [Table Text Block] Presents in tabular form the change in unrealized gain (loss) on derivative instruments in accumulated other comprehensive income. Net transfers from (to) general account Transfer To From Policyholder Account Balance (To) From General Account Transfer To From Policyholder Account Balance To From General Account. Debt-to-Value [Axis] Debt-to-Value [Axis] Exchange-traded funds Separate Account Exchange Traded Funds [Member] Separate Account Exchange-traded Funds [Member] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income (loss) available to common stockholders Net income (loss) available to common stockholders – basic Net Income (Loss) Available to Common Stockholders, Basic Effect of cumulative changes in non-performance risk AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax Foreign currency translation adjustment arising during the year Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Insurance liabilities and reinsurance-related balances Change In Insurance Liabilities And Reinsurance Related Balance Change In Insurance Liabilities And Reinsurance Related Balance Total operating expenses Operating Expenses Changes in DFEL [Roll Forward] Movement In Deferred Front End Loads [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. (Level 1) Fair Value, Inputs, Level 1 [Member] Accrued expenses Increase (Decrease) in Accrued Liabilities Gross deposits Separate Account, Liability, Deposit Diluted (in dollars per share) Earnings Per Share, Diluted Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Embedded derivative liability, measurement input Embedded Derivative Liability, Measurement Input Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Schedule of Realized Gain (Loss) Schedule of Realized Gain (Loss) [Table Text Block] Change in our unrealized gain on derivative instruments in accumulated OCI AOCI Attributable to Parent, Net of Tax [Roll Forward] Overnight and Continuous Maturity Overnight and on Demand [Member] Preferred stock dividends declared Dividends, Preferred Stock, Cash Policyholder Account Balance [Table] Policyholder Account Balance [Table] Percentage of the fair value of foreign securities obtained as collateral under securities lending agreements. Collateral Obtained Percent Of Fair Value Securities Lending Agreements Foreign This item represents the percentage of the fair value of foreign securities obtained as collateral under securities lending agreements Reconciliation of Income (Loss) from Operations by Segment to Consolidated Net Income (Loss) Reconciliation Of Income Loss From Operations From Segments To Consolidated Net Income Loss [Table Text Block] Tabular disclosure of all significant reconciling items in the reconciliation of total income (loss) from operations from reportable segments to the entitys consolidated net income (loss). Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Investments, Debt and Equity Securities [Abstract] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Reinsurer, Name [Axis] Reinsurer, Name [Axis] Reinsurance recoverables, net of allowance for credit losses Reinsurance Recoverables, Including Reinsurance Premium Paid Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Issuances Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] Number of Instruments Derivative Asset, Number of Instruments Held Total Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process Expected future gross premiums Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance Corporate bonds Corporate Bond Securities [Member] Unrealized investment gain (loss) Other Comprehensive Income (Loss) Unrealized Investment Gains (Losses) Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to unrealized investment gains (losses). Market risk benefit (gain) loss Market Risk Benefit, Change in Fair Value, Gain (Loss) Realized Gain (Loss) Gain (Loss) On Securities Disclosure [Text Block] Gain (Loss) On Securities Disclosure Not designated Preferred Stock Non Designated [Member] Preferred Stock, Non Designated [Member]. Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Schedule of Changes in Preferred Schedule Of Changes In Preferred [Table Text Block] Disclosure in tabular form of the changes in the number of shares of the entity's preferred and common stock during the reporting period. Ceded MRBs Ceded Mrbs [Member] Ceded MRBs [Member] Mortgage loans on real estate, gross Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Group Protection Group Protection Segment [Member] The Group Protection segment offers group life, disability and dental insurance to employers. Derivative results Gain (Loss) on Derivative Instruments, Net, Pretax Schedule of Available-for-Sale Securities Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Depositary Shares, each representing a 1/1000th interest in a share of 9.000% Non-Cumulative Preferred Stock, Series D Noncumulative Preferred Stock [Member] MRB assets Mrb Assets [Member] MRB Assets [Member] Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] Fair Value Measured on a Recurring Basis Reconciliation Fair Value, Assets And Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Tabular disclosure of changes to our financial instruments carried at fair value and classified within Level 3. Revenue adjustments from annuity and life insurance product features Revenue Adjustments From Annuity And Life Insurance Product Features Revenue Adjustments From Annuity And Life Insurance Product Features Stockholders’ Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Foreign government bonds Debt Security, Government, Non-US [Member] Other investments Other Investments [Member] Derivative Instruments Derivative Instruments, Excluding Embedded Derivative Instruments [Member] Derivative Instruments, Excluding Embedded Derivative Instruments Fair Value Fair Value Of Related Investments Or Collateral [Abstract] Fair Value Of Related Investments Or Collateral [Abstract] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Increase in gross AFS securities unrealized losses Available For Sale Securities Change In Gross Unrealized Holding Gain (Loss) This item represents the change in gross unrealized holding gain or loss on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period. Fair value hedge on interest rate swap agreements Fair Value Hedge On Interest Rate Swap The fair value hedge associated with forward based contracts on certain long-term debt agreements in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period. Entity Current Reporting Status Entity Current Reporting Status Policyholder account balances – RILA, fixed annuity and IUL contracts Policyholder Account Balances, Fair Value Policyholder Account Balances, Fair Value Derivative [Line Items] Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Consolidated Entities [Domain] Consolidated Entities [Domain] Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Gross amount of recognized liabilities Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Financial Instrument [Axis] Financial Instrument [Axis] Adjustments to reconile net income (loss) to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Expenses Benefits, Losses and Expenses [Abstract] Balance Sheets [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Greater Than Twelve Months Twelve months or greater Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Expected future benefit payments Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted, Before Reinsurance Liability for future policy benefit, expected future policy benefit, discounted, before reinsurance. Issuance of long-term debt, net of issuance costs Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Less Than or Equal to Twelve Months Nine months or greater, but less than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Debt-to-capital ratio, maximum Ratio Of Indebtedness To Net Capital Total Aggregate Indebtedness divided by Net Capital Deferrals Deferred Front End Loads Additions The amount of deferred front end loads capitalized during the period. Payables for Collateral on Investments Schedule of Securities Financing Transactions [Table Text Block] Funds withheld reinsurance-related liabilities – excluding embedded derivatives Derivative Liability Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Interest rate contracts Interest Rate Contract [Member] Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss 51-100 Basis Points Above Policyholder Account Balance Above Guaranteed Minimum Crediting Rate Range From0051 To0100 [Member] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0100 [Member]. Fair Value of Assets and Liabilities on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Equity securities Equity Securities, FV-NI, Current Issuances, Sales, Maturities, Settlements, Calls, Net Total Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Maturities Settlements Calls Represents the net increase or decrease to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to purchases, sales, issuances, or settlements during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value. Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Investment commitments for mortgage loans on real estate Investment Commitments Mortgage Loans This item represents investment commitments as of the balance sheet date for mortgage loans. Composition of Current and Past Due Mortgage Loans on Real Estate Financing Receivable, Past Due [Table Text Block] VOBA Present Value of Future Insurance Profits [Table Text Block] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Securities pledged under repurchase agreements Increase (Decrease) In Cash Collateral For Reverse Repurchase Agreements Increase (Decrease) In Cash Collateral For Reverse Repurchase Agreements Measure: Measure [Axis] Life Insurance Life Segment [Member] The Life segment offers wealth protection and transfer opportunities through term insurance, a linked-benefit product (which is a UL policy linked with riders that provide for long-term care costs) and both single and survivorship versions of UL and VUL, including corporate-owned UL and VUL insurance and bank-owned UL and VUL insurance products. Value of future insurance profits, amortization expense Amortization Present Value Of Future Insurance Profits Other Amortization Expense The amount of other amortization of the present value of future profits asset during the period. Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Cash surrender value Policyholder Account Balance, Cash Surrender Value Total payables for collateral on investments Total Payables For Collateral On Investment Fair Value The total fair value of investments related to payables for collateral on investments as of the balance sheet date. Schedule of Reclassifications Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Purchases of available-for-sale securities and equity securities Payments To Acquire Debt Securities, Available-For-Sale And Equity Securities, FV-NI Payments To Acquire Debt Securities, Available-For-Sale And Equity Securities, FV-NI Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Collateral payable for derivative investments Increase (Decrease) In Cash Collateral For Derivative Investments The net change during the reporting period in the amount of cash that is received related to collateral payable held for derivative instruments. Entity Tax Identification Number Entity Tax Identification Number Valuation Technique, Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] RILA, fixed indexed annuity and IUL contracts Indexed annuity ceded embedded derivatives Indexed Annuity Contracts [Member] Embedded dervivatives within indexed annuity contracts that permit the holder to elect an interest rate return or an equity market component, where interest credited to the contracts is linked to the performance of the Standard and Poor's 500 Index. Common stock - issued (in shares) Common Stock, Shares, Issued CMBS Commercial Mortgage-Backed Securities [Member] Less: Reinsurance recoverables Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance Reductions for disposed securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sold Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Mark-to-market gains (losses) Fair Value, Option, Aggregate Differences, Loans and Long-Term Receivables Other Operations Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Reconciliation of Revenue from Segments to Consolidated Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Separate Accounts Disclosure [Abstract] Effect of actual variances from expected experience Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Change in fair value of embedded derivative instrument and other Policyholder Account Balance, Increase (Decrease) from Other Change MBS Collateralized Mortgage-Backed Securities [Member] Summary of Discounted and Undiscounted Expected Future Gross premiums and Expected Future Benefit Payments Summary Of Discounted And Undiscounted Expected Future Gross Premiums And Expected Future Benefit Payments [Table Text Block] Summarizes of discounted and undiscounted expected future gross premiums and expected future benefit payments. Aggregate Dividend Dividends, Preferred Stock Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Excess non-cash collateral received Excess Non-Cash Collateral Received excess non-cash collateral received . Investment gains (losses) Investment Gains (Losses) Investment Gains (Losses) Fortitude Re Fortitude Re [Member] Fortitude Re [Member] Deferred acquisition costs, value of business acquired, deferred ales inducements and deferred front-end loads Deferred Acquisition Costs Value Of Business Acquired Deferred Sales Inducements And Deferred Front End Loads Deferrals And Interest Net Of Amortization Deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front end loads deferrals and interest, net of amortization. Reinsurance Disclosures [Abstract] Reconciles of MRBs Assets and Liabilities Reconciles Of MRBs Assets And Liabilities [Table Text Block] Reconciles of MRBs Assets and Liabilities [Table Text Block]. Schedule of Investment Holdings Movements Schedule Of Investment Holdings Movements [Table Text Block] Schedule of investment holdings movements. Effect of cumulative changes in discount rate assumptions Effect of cumulative changes in shadow balance in AOCI AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax Balance as of end-of-period, net of reinsurance Deferred Front End Loads, Net Deferred Front End Loads, Net Items Included in Net Income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Deferred profit liability Liability For Future Policy Benefit, Deferred Profit Liability Liability For Future Policy Benefit, Deferred Profit Liability Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Deposits assets Deposits Assets Common Stock Common Stock [Member] Reconciliation of DFEL Reconciliation Of Deferred Front End Loads [Table Text Block] Reconciliation of Deferred Front End Loads Disclosure [Table Text Block]. 3.01% - 4.00% Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From3.01 To4.00 [Member] Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From 3.01 To 4.00 [Member] Net increase (decrease) in cash and invested cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Year six and prior Debt-Service Coverage Ratio, Originated, More than Five Years Before Current Fiscal Year Debt-Service Coverage Ratio, Originated, More than Five Years Before Current Fiscal Year Balance as of beginning-of-year Balance as of end-of-period Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change Percentage of aggregate net proceeds of equity issuances Percentage of aggregate net proceeds of equity issuances Percentage of aggregate net proceeds of equity issuances received by the entity that is added to the specified level of net worth in calculating total minimum net worth to be maintained in accordance with the terms of the credit facility. Statistical Measurement [Domain] Statistical Measurement [Domain] Effect on liability based on mortality Liability For Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) Of Actual Variance From Expected Experience, Mortality Liability For Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) Of Actual Variance From Expected Experience, Mortality Realized Gain (Loss) Debt And Equity Securities, Realized Gain (Loss) [Member] Debt And Equity Securities, Realized Gain (Loss) Amortized Cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Short-term debt Short-Term Debt, Fair Value Benefit payments Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment Greater Than 150 Basis Points Above Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater [Member] Valuation Technique [Domain] Valuation Approach and Technique [Domain] Gains (Losses) in OCI and Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Term loans Term Loans [Member] Term Loans [Member] Credit loss-related adjustments Credit Loss-Related Adjustments Credit Loss-Related Adjustments Effect of actual variances from expected experience, net of reinsurance Liability For Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) Of Actual Variance From Expected Experience, Net Of Reinsurance Liability For Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) Of Actual Variance From Expected Experience, Net Of Reinsurance Pledged Status [Axis] Pledged Status [Axis] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in dollars per share) Earnings Per Share, Basic Change in future contract benefits and policyholder account balances, net of reinsurance AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Change In Future Contract Benefits And Policyholder Account Balances, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Change In Future Contract Benefits And Policyholder Account Balances, Parent Liabilities Liabilities, Fair Value Disclosure [Abstract] Dividend Per Share (in dollars per share) Preferred Stock, Dividends Per Share, Declared Movement in Present Value of Future Insurance Profits [Roll Forward] Movement in Present Value of Future Insurance Profits [Roll Forward] Financing Receivable, Nonaccrual [Table] Financing Receivable, Nonaccrual [Table] Total other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Weighted-average duration of future policyholder benefit liability Liability for Future Policy Benefit, Weighted-Average Duration Discontinued Hedges Discontinued Hedges [Member] Discontinued Hedges [Member] Short-term debt Short-Term Debt Schedule of Fair Value of Separate Account Assets Fair Value, Separate Account Investment [Table Text Block] Measurement Input Type [Domain] Measurement Input Type [Domain] Policyholder Account Balance [Line Items] Policyholder Account Balance [Line Items] Schedule of Available-for-Sale Securities Reconciliation Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Other realized gain (loss) Other Investments Net Realized Gain Loss Other investments, net realized gain (loss) Funds withheld reinsurance-related liabilities – excluding embedded derivatives Reinsurance Related Liabilities Excluding Embedded Derivatives [Member] Reinsurance Related Liabilities Excluding Embedded Derivatives Policyholder assessments Policyholder Account Balance, Policy Charge Fee income Insurance Commissions and Fees Reductions for mortgage loans on real estate charged off Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Other funds Separate Account, Other Fund [Member] Separate Account, Other Fund Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Severance expense for workforce realignment, before tax Other Non Operating Adjustments, Severance Expense For Workforce Realignment, Before Tax Other Non Operating Adjustments, Severance Expense For Workforce Realignment, Before Tax Cash and invested cash Cash and Cash Equivalents [Member] Carrying Value Carrying Value Of Payables For Collateral On Investments [Abstract] Carrying Value Of Payables For Collateral On Investments [Abstract] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Other Other Long-Duration Insurance, Other [Member] Hedging Designation [Domain] Hedging Designation [Domain] Accrued interest receivable excluded from credit losses Financing Receivable, Accrued Interest, after Allowance for Credit Loss Total liabilities and stockholders’ equity Liabilities and Equity Unrealized holding gains (losses) arising during the year AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Unrealized Holding Gains (Losses), Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Unrealized Holding Gains (Losses), Parent Funded Status of Employee Benefit Plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Balance as of beginning-of-year Balance as of end-of-period Deferred Policy Acquisition Cost Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Gross deposits Policyholder Account Balance, Premium Received Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Credit Derivative [Table] Credit Derivative [Table] Non-cash collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Other items, pre-tax Other Non Operating Adjustments, Before Tax Other Non Operating Adjustments, Before Tax Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans Changes In The Fair Value Of Reinsurance-Related Embedded Derivatives, Trading Securities And Certain Mortgage Loans Changes In The Fair Value Of Reinsurance-Related Embedded Derivatives, Trading Securities And Certain Mortgage Loans Concentration Risk Type [Domain] Concentration Risk Type [Domain] Separate Accounts Separate Account [Text Block] Less: Ceded MRB assets (liabilities) Ceded Market Risk Benefit Assets (Liabilities) Ceded Market Risk Benefit Assets (Liabilities) Purchases of other investments Payments to Acquire Other Investments Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Pay vs Performance Disclosure [Line Items] Payout Annuities Payout Annuities [Member] Payout Annuities [Member] 90 or more days past due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Letter of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Liabilities Liabilities [Abstract] Federal Home Loan Bank Federal Home Loan Bank [Member] Federal Home Loan Bank Realized Gain (Loss) [Abstract] Realized (Gain) Loss [Abstract] Hedged items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Variable Interest Entity [Table] Variable Interest Entity [Table] Year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Number of policyholders deemed not economically harmed Number Of Policyholders Deemed Not Economically Harmed Number Of Policyholders Deemed Not Economically Harmed Present Value of Expected Net Premiums Liability for Future Policy Benefit, Expected Net Premium [Roll Forward] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Sustainable Financing Sustainable Financing [Member] Sustainable Financing Name Measure Name Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Five Year Revolving Credit Facility Five Year Revolving Credit Facility [Member] A contractual arrangement with a lender or group of lenders under which borrowings may be made or letters of credit may be issued up to a specific amount, and under which borrowings outstanding may be either short-term or long-term. Arrangement expires May 2018. Interest and debt expense Interest Expense, Debt, Including Gain (Loss) on Extinguishment Of Debt Interest Expense, Debt, Including Gain (Loss) on Extinguishment Of Debt Secured Debt Secured Debt [Member] Adjustment arising during the year Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Maturities of available-for-sale securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Financing Receivable, Nonaccrual [Line Items] Financing Receivable, Nonaccrual [Line Items] Class of Stock [Line Items] Class of Stock [Line Items] Excluding Embedded Derivatives Excluding Embedded Derivatives [Member] Excluding Embedded Derivatives Hybrids Hybrid Securities [Member] Hybrid Securities Changes in Unrealized Gains (Losses) Included in OCI Unrealized Gain (Loss) on Investments [Table Text Block] Long-term debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Fair Value Portion at Other than Fair Value Measurement [Member] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Balance as of beginning-of-period, before the effect of changes in non-performance risk Balance as of end-of-year, before the effect of changes in non-performance risk Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Cash Flows from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other Segment Reporting, Other Segment Item, Amount Over 30 Years Remaining Life Over 30 Years Total notional amounts of derivative financial instruments with maturity dates over 30 years Concentration Risk Type [Axis] Concentration Risk Type [Axis] Assets Assets, Fair Value Disclosure [Abstract] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Schedule of Reconciliation of Separate Account Liabilities Schedule Of Reconciliation Of Separate Account Liabilities [Table Text Block] Schedule of Reconciliation of Separate Account Liabilities [Table Text Block]. Cash Dividends Declared Per Common Share (in dollars per share) Common Stock, Dividends, Per Share, Declared Other investments Other Investments Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Attributed fees collected Market Risk Benefit, Attributed Fee Collected Debt Securities, Available-for-Sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] (Level 2) Fair Value, Inputs, Level 2 [Member] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Annuities Annuities Segment [Member] The Annuities segment provides tax-deferred investment growth and lifetime income opportunities for its clients by offering individual fixed annuities, including indexed annuities and variable annuities. Investments [Table] Investments [Table] Investments [Table] Asset Pledged as Collateral Asset Pledged as Collateral [Member] Document Information [Table] Document Information [Table] PEO PEO [Member] Transfers Into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Table] Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Table] Disclosure of certain activity of fair value measurements classified within Level 3, including a reconciliation of changes in the fair value from beginning of period to end of period, disclosure of the changes in unrealized gains and losses included in net income during the period for financial instruments carried at fair value and still held as of the balance sheet date, and transfers in and out of Level 3 during the period. Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Trading securities Trading securities Debt Securities, Trading Unamortized adjustments from discontinued hedges, assets Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Deferred front-end loads Balance as of beginning-of-year Balance as of end-of-period Deferred Front End Loads The unamortized carrying amount of deferred front end loads as of the balance sheet date. Issuances Market Risk Benefit, Issuance, Net Market Risk Benefit, Issuance, Net Reinsurance recoverables Reinsurance Recoverables, Gross Change in: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Retained Earnings Retained Earnings [Member] Statements of Income [Abstract] Income Statement [Abstract] Cash and invested cash Cash and invested cash as of beginning-of-year Cash and invested cash as of end-of-period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Derivative investments Carrying Value Derivative Asset Greater Than Twelve Months Twelve months or greater Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Changes arising during the year OCI, before Reclassifications, before Tax, Attributable to Parent Interest and Debt Expense Interest Expense [Member] Other investments – short-term investments Investments, Fair Value Disclosure Credit loss (expense) benefit Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Products and Services [Domain] Product and Service [Domain] Calls Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Calls Represents decreases to the amount of certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments) due to calls of investments during the period. The alternative investments represented by this item are subject to significant unobservable inputs (Level 3) for purposes of measuring fair value. Non-operating indebtedness of subsidiaries to total capitalization, maximum Non-operating indebtedness of subsidiaries to total capitalization, maximum Non-operating indebtedness of subsidiaries to total capitalization, maximum Net investment income Net investment income Net Investment Income Issuance of mortgage loans on real estate Issuance Of Mortgage Loans On Real Estate The cash outflow associated with the issuance of mortgage loans on real estate. Equity securities, measurement input Equity Securities, FV-NI, Measurement Input Fair Value Assets And Liabilities Measured On Recurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring Basis [Table] Summarization of information required and determined to be disclosed concerning assets and liabilities, including [financial] instruments that are classified in stockholders' equity, which are measured at fair value on a recurring basis. Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total liabilities Liabilities, Fair Value Disclosure Notional Amounts Total Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Other liabilities – ceded MRBs Market Risk Benefit, Liability [Member] Market Risk Benefit, Liability Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Domain] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Domain] Investments pledged for FHLB lending program Securities Pledged For Federal Home Loan Bank Of Indianapolis Carrying Value The amount of cash received as security in return for loaning securities to Federal Home Loan Bank of Indianapolis. City Area Code City Area Code Changes in Allowance for Credit Losses on Mortgage Loans on Real Estate Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Mortgages Mortgages [Member] Utilization of GLB Withdrawls Measurement Input, Withdrawal Rate [Member] Percentage of the fair value of domestic securities obtained as collateral under securities lending agreements. Collateral Obtained Percent Of Fair Value Securities Lending Agreements Domestic This item represents the percentage of the fair value of domestic securities obtained as collateral under securities lending agreements Traditional Life Traditional Life [Member] Traditional Life [Member]. General and administrative expenses General and Administrative Expense Cash Flows from Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] A Standard & Poor's, A Rating [Member] Percent of non cumulative preferred stock Percent Of Non Cumulative Preferred Stock Percent of non cumulative preferred stock. Fair value hedges Fair Value Hedging [Member] 9.250% Fixed Rate Reset Non-Cumulative Preferred Stock, Series C Nine Two Five Zero Percent Fixed Rate Reset Non Cumulative Preferred Stock Series C [Member] 9.250% Fixed Rate Reset Non-Cumulative Preferred Stock, Series C. Indexed annuity ceded embedded derivatives Indexed Annuity Ceded Embedded Derivatives [Member] Indexed Annuity Ceded Embedded Derivatives [Member] Equity securities Equity Securities, FV-NI Cash flow hedges Cash Flow Hedging [Member] Other liabilities Other Liabilities Goodwill Goodwill Loss contingency, estimate Loss Contingency, Estimate of Possible Loss Equity market contracts Equity Contract [Member] Other Operations [Member] Other Operations [Member] Other Operations includes investments related to the excess capital in our insurance subsidiaries; investments in media properties and other corporate investments; benefit plan net liability; the unamortized deferred gain on indemnity reinsurance; the results of certain disability income business due to the rescission of a reinsurance agreement; the Institutional Pension business; and debt costs. Losses from loan modifications Financing Receivable, Modified in Period, Amount Less than six months Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Less Than Six Months, Accumulated Loss Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than six months. Transfers Out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] RILA, Fixed Annity And IUL Contracts RILA, Fixed Annity And IUL Contracts [Member] RILA, Fixed Annity And IUL Contracts Balanced funds Separate Account, Balanced Fund [Member] Separate Account, Balanced Fund Protective Protective [Member] Protective [Member] Market risk benefit, measurement input Market Risk Benefit, Measurement Input Investment gains (losses), pre-tax Investment Gains (Losses), Before Tax Investment Gains (Losses) Reconciling Item Nature of Operations and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Payment related to sale-leaseback transactions Payments Of Sale Leaseback Transactions Payments of sale leaseback transactions, primarily related to principal payments. Beginning Fair Value Ending Fair Value Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Other Performance Measure, Amount Other Performance Measure, Amount MRBs Market Risk Benefits [Member] Market Risk Benefits [Member] Separate Account, Liability [Roll Forward] Separate Account, Liability [Roll Forward] Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Line Items] Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Line Items] Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Line Items] Derivative Instrument [Axis] Derivative Instrument [Axis] In-force updates and other changes in MRBs Market Risk Benefit, Increase (Decrease) from Other Assumption Commercial Commercial mortgage loans on real estate Commercial Real Estate Portfolio Segment [Member] Investments: Investments [Abstract] Entity [Domain] Entity [Domain] Alternative investments as a percentage of overall invested assets Alternative Investments As A Percentage Of Overall Invested Assets Alternative investments as a percentage of overall invested assets. Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Withdrawals Policyholder Account Balance, Withdrawal Interest rate contracts, amount of gain or (loss) reclassified from AOCI into income Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Lender Name [Axis] Lender Name [Axis] Unamortized premium (discount) Financing Receivable, Unamortized Purchase Premium (Discount) Deferred acquisition costs, value of business acquired and deferred sales inducements Deferred Policy Acquisition Costs, Value Of Business Acquired, And Deferred Sales Inducements Deferred Policy Acquisition Costs, Value Of Business Acquired, And Deferred Sales Inducements Effective income tax rate reconciliation, percent Effective Income Tax Rate Reconciliation, Percent DAC Deferred Policy Acquisition Costs [Table Text Block] Carrying Amount Reported Value Measurement [Member] Policyholder Account Balances Policyholder Account Balances [Member] Policyholder account balances Additions from purchases of PCD mortgage loans on real estate Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Amortized cost of mortgage loans on real estate on nonaccrual status Financing Receivable, Nonaccrual Consumer Non-Cyclical Industry Consumer Non Cyclical Industry [Member] Consumer Non-Cyclical Industry Segment Information Segment Reporting Disclosure [Text Block] 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] Non-Qualifying Hedges Not Designated as Hedging Instrument [Member] Swiss Re Swiss Re [Member] Represent the largest reinsurance exposure as our reinusrance operations were acquired by Swiss Re in December 2001, through a series of indemnity reinsurance transactions. Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Weighted-average crediting rate Policyholder Account Balance, Weighted Average Crediting Rate Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Other equity funds Other Equity Fund [Member] Other Equity Fund Weighted Average Range Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Securities Pledged by Contractual Maturity Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] Volatility Measurement Input, Price Volatility [Member] Fixed maturity AFS and trading securities, measurement input Debt Securities, Available-for-Sale, Measurement Input Components and Changes in AOCI Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Nonperforming Nonperforming Financial Instruments [Member] 1.01% - 2.00% Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From1.01 To2.00 [Member] Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From 1.01 To 2.00 [Member] RMBS Residential Mortgage-Backed Securities [Member] Funds withheld reinsurance liabilities Funds Held under Reinsurance Agreements, Liability Arrangement Duration Trading Arrangement Duration 1 - 5 Years Remaining Life 1 To 5 Years Total notional amounts of derivative financial instruments maturing in 1 - 5 years. Segments [Axis] Segments [Axis] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other Payment for (Proceeds from) Other Investing Activity The Lincoln National Life Insurance Company The Lincoln National Life Insurance Company [Member] The Lincoln National Life Insurance Company Up to 30 Days Maturity Less than 30 Days [Member] Investments pledged for FHLB lending program Increase (Decrease) In Cash Collateral For Securities Pledged For FHLBI The net change during the reporting period in the amount of cash that is received related to securities pledged for Federal Home Loan Bank of Indianapolis. ASSETS Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Foreign currency contracts, amount of gain or (loss) reclassified from AOCI into income Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Debt Instrument [Axis] Debt Instrument [Axis] Net (Assets) Liabilities Balance as of beginning-of-year Balance as of end-of-period Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Credit Facility [Domain] Credit Facility [Domain] Fair value of portfolio rated below investment grade Fair Value Of Portfolio Rated Below Investment Grade Fair value of portfolio rated below investment grade. Commissions Insurance Commissions Investment, Name [Axis] Investment, Name [Axis] Loans with fair value option in non-accrual Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status 30 to 59 days past due Financial Asset, 30 to 59 Days Past Due [Member] Reconciliation of total income (loss) from operations to net income (loss): Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Additions for securities for which credit losses were not previously recognized Total credit loss benefit (expense) Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded Non-Performance Risk Measurement Input, Credit Spread [Member] Concentration of Credit or Market Risk [Axis] Concentration of Credit or Market Risk [Axis] Gross amount of recognized assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Entity Registrant Name Entity Registrant Name Cash flow hedge gain (loss) to be reclassified within 12 months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Change in market performance Separate Account, Liability, Increase (Decrease) from Invested Performance Disclosure of Variable Interest Entities Assets and Liabilities [Line Items] Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items] Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items] Total increase (decrease) in payables for collateral on investments Increase (Decrease) In Collateral For Loaned Securities The increase (decrease) during the reporting period in the amount that is received as security when loaning securities. Investment commitments for asset-backed VIEs Investment Commitments, Asset-Backed Variable Interest Entities Investment Commitments, Asset-Backed Variable Interest Entities DFEL Deferred Front End Loads [Table Text Block] This element may be used as a single block of text to encapsulate the entire disclosure, including data and tables, pertaining to the nature and amount of deferred front end loads associated with insurance contracts. Domestic Domestic Equity Fund [Member] Domestic Equity Fund Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans, pre-tax Changes In The Fair Value Of Reinsurance-Related Embedded Derivatives, Trading Securities And Certain Mortgage Loans, Before Tax Changes In The Fair Value Of Reinsurance-Related Embedded Derivatives, Trading Securities And Certain Mortgage Loans, Before Tax Total assets Assets, Fair Value Disclosure Total number of fixed maturity AFS securities in an unrealized loss position Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Claims Utilization Factor Measurement Input Claims Utilization Rate [Member] Measurement input using claims rate at which policyholder exercises optional benefit upon eligibility under insurance contract. Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI for mortgage loan Collateral Obtained, Percent Of Fair Value Of Mortgage Loan This item represents the percentage of the fair value of Mortgage loans obtained as collateral pledged. Number of operating segments Number of Operating Segments Up to 1.00% Policyholder Account Balance Guaranteed Minimum Crediting Rate Range Up To1.00 [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Up to 1.00 [Member]. Schedule of Changes in Debt Schedule of Debt [Table Text Block] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Net amount Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction Loans with fair value option, 90 days past due and still accruing Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due Restatement Determination Date: Restatement Determination Date [Axis] Mortgage loans on real estate Mortgage Loans On Real Estate [Member] Mortgage Loans On Real Estate [Member] Stock compensation/issued for benefit plans Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture LTV Greater Than 75% Loan To Value Ratio Greater Than Seventy Five [Member] Loan To Value Ratio Greater Than Seventy Five [Member] Fixed maturity AFS securities other than structured securities Fixed Maturity AFS Securities Other Than Structured Securities [Member] Fixed maturity AFS securities not including the structured securities (ABS, MBS, CLOs) Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Policyholder account balances – funding agreements Policyholder Account Balances, Funding Agreements [Member] Policyholder Account Balances, Funding Agreements 30-90 Days Maturity 30 to 90 Days [Member] Guaranty liabilities Guaranty Liabilities Effect of changes in equity markets Market Risk Benefit, Increase (Decrease) from Equity Market Change Separate account liabilities Balance as of beginning-of-year Balance as of end-of-period Separate Account, Liability Name Trading Arrangement, Individual Name Embedded derivative asset Embedded Derivative, Fair Value of Embedded Derivative Asset Debt instrument, face amount Debt Instrument, Face Amount 101-150 Basis Points Above Policyholder Account Balance Above Guaranteed Minimum Crediting Rate Range From0101 To0150 [Member] Policyholder Account Balance, Above Guaranteed Minimum Crediting Rate, Range From 0101 To 0150 [Member] Preferred Stock Preferred Stock [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Investment commitments for limited partnerships Investment Commitments Limited Partnerships This item represents investment commitments as of the balance sheet date for limited partnerships. Closed end funds measured at NAV per share Alternative Investment Series D Depositary Shares Series D Depositary Shares [Member] Series D Depositary Shares [Member]. Income tax benefit (expense) Income tax benefit (expense) Other Comprehensive Income (Loss) before Reclassifications, Tax Securities pledged under securities lending agreements Securities Pledged Under Securities Lending Agreements Fair Value The fair value of investments loaned to another party under securities lending agreements as of the balance sheet date. Reporting Segment [Domain] Segments [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Fixed maturity AFS securities Fixed maturity AFS securities: Fixed Maturities [Member] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair value of securities received as collateral that have been resold or repledged Fair Value of Securities Received as Collateral that Have Been Resold or Repledged Fair Value Plan Asset Measurement [Domain] Fair Value Hierarchy and NAV [Domain] Assets Sold under Agreements to Repurchase, Maturity Period [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] New Accounting Standards Accounting Standards Update and Change in Accounting Principle [Table Text Block] Accrued interest receivable on fixed maturity AFS securities Debt Securities, Available-for-Sale, Accrued Interest Writeoff Financial Assets Derivative Asset [Abstract] Unrealized Gain (Loss) on Fixed Maturity AFS Securities and Certain AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Collateral Posted by Counterparty Cash collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Policyholder account balances Balance as of beginning-of-year Balance as of end-of-period Policyholder account balances – certain investment contracts Policyholder Account Balance Summary of Weighted-Average Interest Rates Summary Of Weighted-Average Interest Rates [Table Text Block] Summary of Weighted-Average Interest Rates [Table Text Block]. Gross amounts offset Derivative Liability, Subject to Master Netting Arrangement, Asset Offset State and municipal bonds US States and Political Subdivisions Debt Securities [Member] Effect of changes in equity index volatility Market Risk Benefit, Increase (Decrease) from Volatility Transfers from (to) separate accounts, net Transfers To And From Separate Accounts, Net Transfers to and from separate accounts, net. Year two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Amortization Deferred policy acquisition costs, amortization expense Deferred Policy Acquisition Costs, Amortization Expense Transaction and integration costs for acquisitions or divestiture, before tax Other Non Operating Adjustments, Transaction And Integration Costs For Acquisitions Or Divestiture, Before Tax Other Non Operating Adjustments, Transaction And Integration Costs For Acquisitions Or Divestiture, Before Tax Derivatives designated as hedging instruments Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Net life insurance product features, pre-tax Net Life Insurance Product Features, Before Tax Net Life Insurance Product Features, Before Tax MRB liabilities Mrb Liabilities [Member] MRB Liabilities [Member] Contingencies and Commitments (See Note 14) Commitments and Contingencies Collateral payable for derivative investments Collateral Payable Held For Derivative Investments Carrying Value When entering into a derivative transaction, the amount of cash received as collateral from a counterparty. Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] 2.01% - 3.00% Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From2.01 To3.00 [Member] Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From 2.01 To 3.00 [Member] Change in foreign currency exchange rate adjustment Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent, Change In Foreign Currency Exchange Rate, Parent [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent, Change In Foreign Currency Exchange Rate, Parent Schedule of Collateral Amounts With Rights to Reclaim or Obligation to Return Cash Schedule Of Collateral Amounts With Rights To Reclaim Or Obligation To Return Cash [Table Text Block] Schedule of collateral amounts with rights to reclaim or obligation to return cash based on the S&P credit rating of counterparty. Market risk benefit non-performance risk gain (loss) OCI, Market Risk Benefit, Instrument-Specific Credit Risk, Gain (Loss), after Adjustments, Tax Other Policyholder Account Balance Guaranteed Minimum Crediting Rate Range Other [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Other [Member]. New Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Net Income (Loss) Available to Common Stockholders Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Impact on future policy benefits, mortality Liability for Future Policy Benefit, Expected Future Policy Benefit, Mortality Liability for Future Policy Benefit, Expected Future Policy Benefit, Mortality Cumulative fair value hedging adjustment included in the amortized cost of the hedged assets (liabilities) Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Debt, term Long-Term Debt, Term Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Derivative investments Derivative Financial Instruments, Assets [Member] Number of reinsurance recoverable agreements Number Of Reinsurance Recoverable Agreements Number Of Reinsurance Recoverable Agreements Deposits Deposits Of Fixed Account Values Including Fixed Portion Of Variable Deposits of fixed account values, including the fixed portion of variable. 60 to 89 days past due Financial Asset, 60 to 89 Days Past Due [Member] Hedging Designation [Axis] Hedging Designation [Axis] Effects of Qualifying and Non-Qualifying Hedges Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Undiscounted Liability For Future Policy Benefit, Undiscounted, Befiore Reinsurance [Abstract] Liability For Future Policy Benefit, Undiscounted, Befiore Reinsurance Future Contract Benefits Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Funded status of employee benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Discounted Liability For Future Policy Benefit, Discounted, Befiore Reinsurance [Abstract] Liability For Future Policy Benefit, Discounted, Befiore Reinsurance Derivative Contract Type [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Gross losses Debt Securities, Available-for-Sale, Realized Loss Total Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Change in fair value of derivatives Unrealized Gain (Loss) on Derivatives Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] Market risk benefit assets Assets Market Risk Benefit, Asset, Amount Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Fixed maturity available-for-sale securities, at fair value Debt Securities, Available-for-Sale, Amortized Cost, after Allowance for Credit Loss [Abstract] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Sales and maturities (purchases) of trading securities, net Proceeds from (Payments for) Trading Securities, Short-Term Other assets – ceded MRBs Market Risk Benefit, Asset [Member] Market Risk Benefit, Asset Withdrawals Separate Account, Liability, Withdrawal Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Liability for Future Policy Benefit Activity [Table] Liability for Future Policy Benefit Activity [Table] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Credit loss benefit (expense) Debt Securities, Available-For-Sale, Credit Loss Expense (Reversal), Not Previously Recorded Debt Securities, Available-For-Sale, Credit Loss Expense (Reversal), Not Previously Recorded Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Cumulative Basis Adjustments for Fair Value Hedges Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Financial Liabilities Derivative Liability [Abstract] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Gains (losses) on other non-financial assets – sale of subsidiaries/businesses, pre-tax Gains (Losses) On Other Non-Financial Assets, Sale Of Subsidiaries Or Businesses, Before Tax Gains (Losses) On Other Non-Financial Assets, Sale Of Subsidiaries Or Businesses, Before Tax Operating revenues Operating Revenues Operating Revenues Less than six months Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Less Than Six Months, Number Of Positions Number of investment positions in available-for-sale investments in a continuous unrealized loss position for more than six months but less than nine, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. Year two Debt-Service Coverage Ratio, Year Two, Originated, Fiscal Year Before Current Fiscal Year Debt-Service Coverage Ratio, Year Two, Originated, Fiscal Year Before Current Fiscal Year Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Interest accretion rate Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate Additions (reductions) from provision for credit loss expense Credit loss benefit (expense) on mortgage loans on real estate Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Premium expected to be collected Financial Guarantee Insurance Contracts, Premium Receivable, Premium Expected to be Collected Deferred Policy Acquisition Cost [Table] Deferred Policy Acquisition Cost [Table] Net Income (Loss) Per Common Share Earnings Per Share [Abstract] 4.01% and above Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From4.01 And Greater [Member] Policyholder Account Balance Guaranteed Minimum Crediting Rate Range From 4.01 And Greater [Member] Embedded Derivative Instruments Embedded Derivative Financial Instruments [Member] Preferred stock dividends declared Preferred Stock Dividends and Other Adjustments Schedule of Policyholder Account Balances Schedule Of Policyholder Account Balances [Table Text Block] Schedule of Policyholder Account Balances [Table Text Block]. Balance as of end-of-period, net of reinsurance Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Award Timing Disclosures [Line Items] Amortized cost of portfolio rated below investment grade Amortized Cost Of Portfolio Rated Below Investment Grade Amortized cost of portfolio rated below investment grade. Shares and Stockholders' Equity Equity [Text Block] Sales of available-for-sale securities and equity securities Proceeds From Sale Of Debt Securities, Available-For-Sale, And Equity Securities Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and sale of equity securities. Investments pledged for FHLB lending program Securities Pledged For Federal Home Loan Bank Of Indianapolis Fair Value The fair value of investments loaned to Federal Home Loan Bank of Indianapolis as of the balance sheet date. Mortgage loans on real estate, net of allowance for credit losses Total carrying value Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Reinsurance Reinsurance [Text Block] Net income (loss) Net income (loss) Net Income (Loss) Net Income (Loss) Attributable to Parent Net transfers from (to) separate account Transfer to (from) Policyholder Account Balance (to) from Separate Account Future contract benefits Net balance as of end-of-period Liability for Future Policy Benefit, before Reinsurance Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Debt-Service Coverage Ratio Debt-Service Coverage Ratio [Abstract] Debt-Service Coverage Ratio Preferred stock - authorized (in shares) Preferred Stock, Shares Authorized Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Net premiums collected Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected Reductions for securities charged off Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Total income (loss) from operations Operating Income (Loss) LTV Less Than 65% Loan To Value Ratio Less Than Sixty Five [Member] Loan-to-value ratio less than 65%. The loan-to-value ratio compares the principal amount of the loan to the fair value at origination of the underlying property collateralizing the loan and is commonly expressed as a percentage. Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Number of Securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Number of Positions [Abstract] U.S Treasury Department U.S Treasury Department [Member] U.S Treasury Department Indexed product derivative results Embedded Derivative, Gain (Loss) on Embedded Derivative, Net Residential mortgage loans on real estate Residential Residential Portfolio Segment [Member] At Guaranteed Minimum Policyholder Account Balance, at Guaranteed Minimum Crediting Rate [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Nine months or greater, but less than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Withdrawals Withdrawals Of Fixed Account Values Including Fixed Portion Of Variable Withdrawals of fixed account values, including the fixed portion of variable. Class of Stock [Axis] Class of Stock [Axis] Realized gain (loss) on the market-to-market on certain instruments Realized Gain (Loss) On Mark To Market On Certain Instruments Represents changes in the fair values of certain derivative instruments (including those associated with consolidated variable interest entities), total return swaps (embedded derivatives that are theoretically included in various assets and liabilities associated with these arrangements) and trading securities. Unrealized Gain (Loss) on Derivative Instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Unrealized holding gains (losses) arising during the period - cash flow hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent, Unrealized Holding Gains (Losses), Parent [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent, Unrealized Holding Gains (Losses), Parent Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] SOFR Due 2027 SOFR Due 2027 [Member] SOFR Due 2027 Credit Derivatives [Line Items] Credit Derivatives [Line Items] Statement [Table] Statement [Table] Premiums Utilization Factor Measurement Input Premiums Utilization Rate [Member] Measurement input using premiums rate at which policyholder exercises optional benefit upon eligibility under insurance contract. Lender Concentration Risk Lender Concentration Risk [Member] Cash Flows from Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Schedule of Assets in Support of Reserves Schedule Of Reinsurance Recorded On Statement Of Financial Condition [Table Text Block] Schedule of Reinsurance Recorded on Statement of Financial Condition [Table Text Block] Series C Preferred Stock Series C Preferred Stock [Member] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Interest accretion Liability for Future Policy Benefit, Interest Expense Net amount of liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral Year five Debt-Service Coverage Ratio, Year Five, Originated, Four Years Before Current Fiscal Year Debt-Service Coverage Ratio, Year Five, Originated, Four Years Before Current Fiscal Year Amendment Flag Amendment Flag Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Termination Date Trading Arrangement Termination Date Beginning balance at original discount rate Ending balance at original discount rate Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Allowance for credit losses Balance as of beginning-of-year Balance as of end-of-year Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Collateral payable for derivative investments Collateral Payable Held For Derivative Investments Fair Value The fair value of cash received as collateral from a counterparty. UL and Other UL And Other [Member] Ul and Other [Member] Weighted-average shares, as used in basic calculation (in shares) Weighted Average Number of Shares Outstanding, Basic Bond funds Separate Account, Bond Fund [Member] Separate Account, Bond Fund Reconciliation of the Denominator Calculations of Basic and Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Gross amount of recognized assets Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Repayment and maturities of mortgage loans on real estate Repayment And Maturities Of Mortgage Loans On Real Estate The investing cash inflow associated with the repayment and/or maturities of mortgage loans on real estate. Segment Reporting [Abstract] Market Risk Benefit [Roll Forward] Market Risk Benefit [Roll Forward] Debt Disclosure [Abstract] Impact on net premiums, mortality Liability For Future Policy Benefit, Expected Net Premium, Mortality Liability For Future Policy Benefit, Expected Net Premium, Mortality Reconciliation of DAC, VOBA and DSI Reconciliation Of DAC, VOBA And DSI [Table Text Block] Reconciliation of DAC, VOBA and DSI [Table Text Block]. Income tax benefit (expense) Reclassification from AOCI, Current Period, Tax Expected future gross premiums Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance Reclassification adjustment for gains (losses) included in net income (loss) Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Range of guaranteed minimum crediting rate Policyholder Account Balance, Guaranteed Minimum Credit Rating Fair Value, Separate Account Investment [Line Items] Fair Value, Separate Account Investment [Line Items] Unrealized holding losses arising during the period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Issuances Liability for Future Policy Benefit, Expected Net Premium, Issuance Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Consolidated Entities [Axis] Consolidated Entities [Axis] Policyholder liability remeasurement (gain) loss Liability for Future Policy Benefit, Remeasurement Gain (Loss) Realized gain (loss) on equity securities Equity Securities, FV-NI, Realized Gain (Loss) Number Of Reportable Segments Disclosed By Definition Flag Number Of Reportable Segments Disclosed By Definition Flag Number Of Reportable Segments Disclosed By Definition Flag Line of credit outstanding Line of Credit Facility, Fair Value of Amount Outstanding Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Income tax benefit (expense) Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Summary of Reconciliation of Future Contract Benefits Summary Of Reconciliation Of Future Contract Benefits [Table Text Block] Reconciliation of Future Contract Benefits [Table Text Block]. Gross amounts offset Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Year six and prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Equity securities Equity Securities [Member] Current Financial Asset, Not Past Due [Member] Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net [Abstract] Allowance for Credit Losses Balance as of beginning-of-period Balance as of end-of-period Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Investment commitments Investment Commitments This item represents total investment commitments as of the balance sheet date for fixed maturity available-for-sale securities, limited partnerships, real estate and mortgage loans on real estate. Net amount at risk Market Risk Benefit, Net Amount at Risk Total liabilities Liabilities Common stock Common Stock, Value, Outstanding Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Equity funds: Separate Account, Equity Security [Member] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Gross premiums Gross assessments Liability for Future Policy Benefit, Gross Premium Income Non-cash collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Fair Value, Separate Account Investment [Table] Fair Value, Separate Account Investment [Table] ABS Asset-Backed Securities [Member] Consolidation Items [Axis] Consolidation Items [Axis] Aggregate contractual principal Fair Value Option, Aggregate Contractual Principal Fair Value Option, Aggregate Contractual Principal Other investments Separate Account Other [Member] Separate Account Other [Member]. Fair Value Inputs Quantitative Information Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Summary of Balances and Changes in Policyholder Account Balances Policyholder Account Balance [Table Text Block] Counterparty Name [Axis] Counterparty Name [Axis] Policyholder assessments Separate Account, Liability, Policy Charge Market Risk Benefit [Table] Market Risk Benefit [Table] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Fair value of collateral received that we are permitted to sell or re-pledge Fair Value of Securities Received as Collateral that Can be Resold or Repledged