Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Trading Arrangement:
Trading Arrangement [Axis]
Maximum
Maximum [Member]
Closed Block
Closed Block [Member]
Closed Block [Member]
Offsetting Derivative Assets [Abstract]
Offsetting Derivative Assets [Abstract]
Title of 12(b) Security
Title of 12(b) Security
Debt Securities, Available-for-sale
Debt Securities, Available-for-Sale [Table]
Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk
Derivative Instruments, Gain (Loss) [Table]
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Loss Position Gross Loss
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Policyholder Account Balance
Policyholder Account Balance [Table Text Block]
Financial Instrument
Financial Instrument
Financial Instrument [Axis]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance
Pension and Other Postretirement Benefits Disclosure
Retirement Benefits [Text Block]
Derivative Instrument
Derivative Instrument [Axis]
Location of Gains and Losses on Derivative Financial Instruments Designated as Cash Flow Hedging Instruments [Abstract]
Location of Gains and Losses on Derivative Financial Instruments Designated as Cash Flow Hedging Instruments [Abstract]
Disclosure - Location of Gains and Losses on Derivative Financial Instruments Designated as Cash Flow Hedging Instruments [Abstract]
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate
Measurement Frequency
Measurement Frequency [Axis]
United States Government and Government Agencies and Authorities
United States Government and Government Agencies and Authorities
US Treasury and Government [Member]
Current
Current Income Tax Expense (Benefit)
Consolidated Entities
Consolidated Entities [Axis]
Available For Sale Securities Debt Maturities After Ten Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities After Ten Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities After Ten Years Unrealized Gain Position Gross Gain
Total Financial Instrument Assets Not Carried at Fair Value
Financial Instruments, Financial Assets Fair Value Disclosure, Carrying Value
Financial Instruments, Financial Assets Fair Value Disclosure, Carrying Value
Total policyholders' account balances, after reserves in excess of account balance
Total policyholders' account balances, after reserves in excess of account balance
Total policyholders' account balances, after reserves in excess of account balance
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Mortgage/Asset-backed Securities
Asset-Backed Securities [Member]
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis]
Consolidated Entities
Consolidated Entities [Domain]
Common Stock, Par Value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Reclassification out of Accumulated Other Comprehensive Income (Loss)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Exchange [Domain]
Exchange [Domain]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Securities Given as Collateral on Securities Loaned
Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Premiums Receivable, Gross
Premiums Receivable, Gross
Financial Assets Net of Collateral
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Fair Value Volatility
Fair Value Volatility [Member]
Fair Value Volatility
Gross Financial Assets
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, before Offset
Fair Value, Assets and Liabilities Components
Fair Value, Assets and Liabilities Components [Axis]
Fair Value, Assets and Liabilities Components Axis
Mountain
Mountain [Member]
Mountain [Member]
Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value
Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value [Table Text Block]
Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value
Available For Sale Securities Unrealized Loss Position Gross Loss Subtotal
Available For Sale Securities Unrealized Loss Position Gross Loss Subtotal
Available For Sale Securities Unrealized Loss Position Gross Loss Subtotal
Unum International
Unum International [Member]
Unum International [Member]
Approximate amount of net deferred gains on derivative instruments expected to be amortized during the next twelve months
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months
Entity Address, City or Town
Entity Address, City or Town
Originated in Fiscal Year before Latest Fiscal Year
Originated in Fiscal Year before Latest Fiscal Year [Member]
Originated in Fiscal Year before Latest Fiscal Year
Net Financial Liabilities Reported in Balance Sheet
Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned
East North Central
East North Central [Member]
East North Central [Member]
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax
Federal Home Loan Bank Common Stock
Federal Home Loan Bank Stock
Class of Financing Receivable
Class of Financing Receivable [Domain]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Repurchase Program Authorized in December 2025
Repurchase Program Authorized in December 2025 [Member]
Repurchase Program Authorized in December 2025
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment and Other
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment and Other
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Mortgage Loans and Other Invested Assets
Other Investments [Abstract]
Other Investments Gross Realized Losses
Mortgage Loans and Other Invested Assets Gross Realized Losses
Mortgage Loans and Other Invested Assets Gross Realized Losses
Fair Value, Inputs, Level 2
Fair Value, Inputs, Level 2 [Member]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Net Other Comprehensive Income
Other Comprehensive Income (Loss)
Net Other Comprehensive Income
Other Comprehensive Income (Loss), Net of Tax
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Assets by Segment
Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block]
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected
Private Equity Limited Partnership
Private Equity Limited Partnership [Member]
Private Equity Limited Partnership [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Repurchase agreements - Typical Days outstanding
Repurchase Agreements, Maturities
Redeemable Preferred Stocks
Redeemable Preferred Stock [Member]
All Other Corporate Bonds
Other Corporate Bonds [Member]
Schedule of Long-term Debt Instruments
Schedule of Long-Term Debt Instruments [Table]
Colonial Life
Colonial Life [Member]
Colonial Life [Member]
Securities Received as Collateral on Derivative Assets
Fixed Maturity Securities received as Collateral
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment
Class of Treasury Stock
Class of Treasury Stock [Table]
Cash Collateral for Borrowed Securities
Cash Collateral for Borrowed Securities
Investment Income
Investment Income [Table]
Premium Receivable, Credit Loss Expense (Reversal)
Premium Receivable, Credit Loss Expense (Reversal)
Selected Operating Statement Data by Segment
Segment Reporting [Table Text Block]
U.S. Pension Plan
U.S. Pension Plan [Member]
U.S. Pension Plan
Change in Unrecognized Pension and Postretirement Benefit costs, Tax Expense
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax
Available for Sale Securities Unrealized Loss Position Gross Loss
Available for Sale Securities Unrealized Loss Position Gross Loss
Available-For-Sale Securities, Debt Maturities Unrealized Loss Position Gross Loss Abstract
East South Central
East South Central [Member]
East South Central [Member]
External Credit Rating by Grouping
External Credit Rating by Grouping [Domain]
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Supplemental
Supplemental and Voluntary Insurance [Member]
Supplemental and Voluntary Insurance [Member]
Schedule of Financial Instrument and Derivative Offsetting
Schedule of Financial Instrument and Derivative Offsetting [Table Text Block]
Schedule of Financial Instrument and Derivative Offsetting [Table Text Block]
Document Period End Date
Document Period End Date
Financial Instruments, Financial Assets Fair Value Disclosure
Financial Instruments, Financial Assets Fair Value Disclosure, Total
Financial Instruments, Financial Assets Fair Value Disclosure, Total
Gross Losses on Sales
Debt Securities, Available-for-Sale, Realized Loss
Reconciliation of Total Revenue and Income Before Income Tax to Adjusted Operating Revenue and Adjusted Operating Income
Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block]
Reclassification out of Accumulated Other Comprehensive Income (Loss)
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Outstanding Repurchase Agreements
Securities Sold under Agreements to Repurchase
Strategic Actions
Strategic Actions
Strategic Actions
Strategic Actions
Liability for Future Policy Benefit, Adverse Development, Expense
Liability for Future Policy Benefit, Adverse Development, Expense
Nature and Amount of Collateral Received From and Posted To Derivative Counterparty
Nature and Amount of Collateral Received From and Posted To Derivative Counterparty [Table Text Block]
[Table Text Block] for Nature and Amount of Collateral Received From and Posted To Derivative Counterparty [Table]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value Additional Information [Line Items]
Fair Value Additional Information
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Entity Shell Company
Entity Shell Company
Consolidation Items
Consolidation Items [Domain]
Effect of Change in Discount Rate Assumptions on the LFPB
AOCI, Liability for Future Policy Benefit, Parent [Member]
Earnings Per Share Disclosure
Earnings Per Share [Text Block]
Net Income Per Common Share
Earnings Per Share [Abstract]
Offsetting Liabilities [Line Items]
Offsetting Liabilities [Line Items]
Document Fiscal Period Focus
Document Fiscal Period Focus
Policyholder Account Balance, Reserves in excess of Account Balance
Policyholder Account Balance, Reserves in excess of Account Balance
Policyholder Account Balance, Reserves in excess of Account Balance
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Premium Income by Major Line of Business within Each Segment
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block]
Total Liabilities
Liabilities
Trading Symbol
Trading Symbol
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Loss Gross Subtotal
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Loss Gross Subtotal
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Loss Gross Subtotal
Net Purchases of Property and Equipment
Payments to Acquire Property, Plant, and Equipment
Financing Receivable, Allowance for Credit Loss Rollforward, Mortgage Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Company Selected Measure Name
Company Selected Measure Name
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)
Transaction
Transaction [Domain]
Payments to Acquire Debt Securities, Available-for-sale
Payments to Acquire Debt Securities, Available-for-Sale
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10, Net of Allowance for Credit Losses
Offsetting Assets and Liabilities
Offsetting Liabilities [Table]
OCI, Liability for Future Policy Benefit, Gain (Loss), after REclassification Adjustment, Tax
OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, Tax
Gains and Losses on Derivatives Not Designated as Hedging Instruments
Derivatives Not Designated as Hedging Instruments [Table Text Block]
Minimum percent of the fair value of securities loaned or securities purchased under repurchase agreements be maintained as collateral
Collateral Requirements Minimum Percentage Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements
Collateral Requirements, Minimum Percentage, Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements
Change in Other Accrued Liabilities
Increase (Decrease) in Other Accrued Liabilities
Credit Facility
Credit Facility [Domain]
Cash Flows from Operating Activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Policy Benefits - Remeasurement Loss (Gain)
Liability for Future Policy Benefit, Remeasurement Gain (Loss)
Federal Home Loan Bank, Collateral Posted to FHLB
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged
Group Short-term Disability
Group Short term Disability [Member]
Group Short Term Disability [Member]
Allowance for Expected Credit Losses on Premiums Receivable
Allowance for Credit Losses [Text Block]
Common Stock, Dividends, Per Share, Cash Paid
Common Stock, Dividends, Per Share, Cash Paid
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Credit Loss [Abstract]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Net Investment Income
Investment Income [Table Text Block]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Change in allowance due to change in intent to hold securities to maturity
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)
Entities [Table]
Entities [Table]
Long-Duration Insurance Contracts Disclosure
Long-Duration Insurance Contracts Disclosure [Text Block]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 [Member]
Financial Liabilities Net of Collateral
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards
Weighted Average Number of Shares Outstanding, Diluted, Adjustment
Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600
Mortgage Loans Sorted by Applicable Credit Quality Indicators Internal Rating [Abstract]
Mortgage Loans Sorted by Applicable Credit Quality Indicators Internal Rating [Abstract]
Disclosure - Mortgage Loans, Sorted by Applicable Credit Quality Indicators, Internal rating [Abstract]
Embedded Derivative Liability, Measurement Input
Embedded Derivative Liability, Measurement Input
Cash Flow Hedge, Hedging Exposure, Maximum Period
Cash Flow Hedge, Hedging Exposure, Maximum Period
Award Timing Predetermined
Award Timing Predetermined [Flag]
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Policy Benefits
Policyholder Benefits and Claims Incurred, Net
Fair Value, Inputs, Level 1
Fair Value, Inputs, Level 1 [Member]
Miscellaneous Long-Term Investments, Fair Value Disclosure
Miscellaneous Long-Term Investments
Miscellaneous Long-Term Investments
Liability for Future Policy Benefit, before Reinsurance, after Other
Liability for Future Policy Benefit, before Reinsurance, after Other
Liability for Future Policy Benefit, before Reinsurance, after Other
Fixed Maturity Securities
Debt Securities, Available-for-Sale [Abstract]
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table]
Class of Financing Receivable
Class of Financing Receivable [Axis]
Par Value Per Share of Preferred Stock
Preferred Stock, Par or Stated Value Per Share
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses, Fiscal Year Maturity
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses, Fiscal Year Maturity [Abstract]
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses, Fiscal Year Maturity
Interest and Debt Expense
Interest and Debt Expense
Strategic Actions included within labor and related expenses
Strategic Actions included within labor and related expenses
Strategic Actions included within labor and related expenses
Offsetting Assets [Table]
Offsetting Assets [Table]
Deferred Policy Acquisition Costs
Deferred Policy Acquisition Costs [Table Text Block]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Payments for Policyholder Account Withdrawals
Withdrawal from Contract Holders Funds
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One, Net of Allowance for Credit Losses
Investments
Investment in Debt and Equity Securities and Other Trading Assets [Text Block]
Amount Outstanding on Line of Credit
Long-Term Line of Credit
Percentage of Total Fair Value of Fixed Maturities Securities
Available For Sale Securities Percent Of Total Fair Value
Available For Sale Securities, Percent Of Total Fair Value
Accounting Developments and New Accounting Policies [Abstract]
Accounting Developments and New Accounting Policies
Expiration Date
Trading Arrangement Expiration Date
Not Redeemable
Not Redeemable [Member]
These partnerships do not allow for redemptions [Member]
Hedging Relationship
Hedging Relationship [Axis]
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change
Derivative Asset, Fair Value, Amount Offset Against Collateral
Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Balance at Beginning of Period
Balance at End of Period
Equity, Including Portion Attributable to Noncontrolling Interest
Derivative Financial Instruments Additional Information [Abstract]
Derivative Financial Instruments Additional Information [Abstract]
Disclosure - Derivative Financial Instruments - Additional Information [Abstract]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table]
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Derivative
Derivative [Table]
Issuance of Common Stock
Proceeds from Issuance of Common Stock
November 2024 Accelerated Share Repurchase
November 2024 Accelerated Share Repurchase [Member]
November 2024 Accelerated Share Repurchase
Earnings Per Share Reconciliation [Abstract]
Embedded Derivative, Fair Value of Embedded Derivative Asset
Embedded Derivative, Fair Value of Embedded Derivative Asset
Loan To Value Ratio Above 85 Percent
Loan To Value Ratio Above 85 Percent [Member]
Loan To Value Ratio Above 85 Percent [Member]
A Credit Rating
A Credit Rating [Member]
A Credit Rating [Member]
Commercial Real Estate
Commercial Real Estate [Member]
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Fair Value
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Fair Value [Domain]
[Domain] for Debt Securities, Available-for-sale, Unrealized Gain (Loss), Fair Value [Axis]
Cash Flows from Investing Activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Other Assets
Other Assets, Unclassified [Abstract]
Segments
Segments [Domain]
Interest Rate Swaps
Interest Rate Swap [Member]
Debt
Debt Disclosure [Text Block]
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)
Embedded Derivative in Modified Coinsurance Arrangement
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain]
Stated Interest Rate of Debt
Debt Instrument, Interest Rate, Stated Percentage
Premium Receivable, Allowance for Credit Loss
Premium Receivable, Allowance for Credit Loss
Total Stockholders' Equity
Balance at Beginning of Year
Balance at End of Year
Equity, Attributable to Parent
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage
2025 Fortitude Re Reinsurance Transaction
2025 Fortitude Re Reinsurance Transaction [Member]
2025 Fortitude Re Reinsurance Transaction
Gross Financial Liability
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, before Offset
Entity Listings, Exchange [Axis]
Entity Listings, Exchange [Axis]
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Mortgage Loan Property Type
Real Estate [Domain]
Offsetting Assets [Line Items]
Offsetting Assets [Line Items]
Assets
Assets, Fair Value Disclosure
Assets [Abstract]
AA Credit Rating
AA Credit Rating [Member]
AA Credit Rating
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table]
Amortized Cost of Fixed Maturity Securities
Debt Securities, Available-for-Sale, Amortized Cost
Credit Exposure
Credit Exposure [Member]
The current credit exposure on derivatives which is limited to the value of those contracts in a net gain position, including accrued interest receivable less collateral held.
Mortgage Loans by Credit Quality Indicators
Financing Receivable Credit Quality Indicators [Table Text Block]
Fair Value, Nonrecurring
Fair Value, Nonrecurring [Member]
Insider Trading Policies and Procedures [Line Items]
Policyholder Account Balance, Surrender and Withdrawal
Policyholder Account Balance, Surrender and Withdrawal
Individual Disability
Individual Disability Insurance [Member]
Individual Disability Insurance [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Deferred
Deferred Income Tax Expense (Benefit)
Securities Received as Collateral on Financial Assets
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset
Stockholders' Equity and Earnings Per Common Share [Abstract]
Stockholders' Equity and Earnings Per Common Share [Abstract]
Stockholders' Equity and Earnings Per Common Share [Abstract]
Liability for Future Policy Benefit, Expected Net Premium, Issuance
Liability for Future Policy Benefit, Expected Net Premium, Issuance
Cash Given as Collateral on Financial Liabilities
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Group Long-term Disability
Group Long term Disability [Member]
Group Long Term Disability [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Number of Operating Segments
Number of Operating Segments
Entity Central Index Key
Entity Central Index Key
Policyholder Account Balance, Weighted Average Crediting Rate
Policyholder Account Balance, Weighted Average Crediting Rate
Additional Paid-in Capital
Additional Paid in Capital, Common Stock
Over the Counter
Over-the-Counter [Member]
Schedule of Available-for-sale Securities
Guarantor Obligation [Table]
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]
Originated in Current Fiscal Year
Originated in Current Fiscal Year [Member]
Originated in Current Fiscal Year
Other Comprehensive Income (Loss) Before Reclassifications
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Schedule of Investments
Schedule of Investments [Line Items]
Fair Value, Hierarchy
Fair Value Hierarchy and NAV [Axis]
Designated as Hedging Instrument
Designated as Hedging Instrument [Member]
Share Repurchase Program, Expiration Date
Share Repurchase Program, Expiration Date
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
All Individuals
All Individuals [Member]
Hedged Asset, Fair Value Hedge
Hedged Asset, Fair Value Hedge
Dividends Paid to Stockholders
Payments of Dividends
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net Securities Loaned Reported in Balance Sheet
Securities Loaned
Statement
Statement [Line Items]
Total Assets
Total Assets
Assets
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures
Defined Benefit Plan [Table]
Private Equity Partnerships
Private Equity Funds [Member]
Internal Credit Assessment
Internal Credit Assessment [Domain]
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity, Not Primary Beneficiary [Member]
Impairment Loss
Impairment Loss, Debt Securities, Available-for-sale
Impairment Loss, Debt Securities, Available-for-sale
Liability for Future Policy Benefit Activity [Table]
Liability for Future Policy Benefit Activity [Table]
Operating Segments
Operating Segments [Member]
Long-term Care
Long term Care [Member]
Long Term Care [Member]
Gross Unrealized Gain
Gross Unrealized Gain
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value
Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value
PEO
PEO [Member]
Net Financial Assets Reported in Balance Sheet
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed
Goodwill
Goodwill
Retirement Plan Type
Retirement Plan Type [Axis]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Number of Fixed Maturity Securities in an Unrealized Loss Position
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Activity [Line Items]
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset
Non-cash Components of Net Investment Income
Increase (Decrease) in Accrued Investment Income Receivable
Available For Sale Securities Debt Maturities Within One Year Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities Within One Year Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities Within One Year Unrealized Gain Position Gross Gain
Retained Earnings
Retained Earnings [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Amortization of Net Actuarial Loss
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Award Timing Disclosures [Line Items]
Carrying Amount and Fair Value of Financial Instruments
Fair Value, by Balance Sheet Grouping [Table Text Block]
Foreign Currency Translation Adjustment
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
All Other Corporate Bonds
Corporate Debt Securities [Member]
Assuming Dilution
Earnings Per Share, Diluted
Policyholder Account Balance, Reinsurance recoverable
Policyholder Account Balance, Reinsurance recoverable
Policyholder Account Balance, Reinsurance recoverable
Internal Credit Assessment
Internal Credit Assessment [Axis]
Current Period Provisions
Financing Receivable, Credit Loss, Expense (Reversal)
Unrealized Gain (Loss) on Investments
Unrealized Gain (Loss) on Investments
Financing Receivable, Allowance for Credit Losses, Mortgage Loans
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance
Financing Receivable, Allowance for Credit Loss, Ending Balance
Financing Receivable, Allowance for Credit Loss
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Liabilities Related to Investment Contracts, Fair Value Disclosure
Liabilities Related to Investment Contracts, Fair Value Disclosure
Policyholder Account Balance, Net Amount at Risk
Policyholder Account Balance, Net Amount at Risk
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales/Maturities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Gain Position Gross Gain
Derivative Liabilities Net of Collateral
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Available for sale Securities, Debt Maturities Unrealized Gain Position Gross Gain
Available for sale Securities, Debt Maturities Unrealized Gain Position Gross Gain
Available for sale Securities, Debt Maturities Unrealized Gain Position Gross Gain
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance
Accounts and Premiums Receivable (net of allowance for credit losses of $26.9; $26.1)
Premiums and Other Receivables, Net
Funding Agreements
Funding Agreements [Member]
Funding Agreements
Hedged Asset, Statement of Financial Position [Extensible Enumeration]
Hedged Asset, Statement of Financial Position [Extensible Enumeration]
Debt-to-Value
Debt-to-Value [Domain]
All Other Derivatives
Derivative, Gain (Loss) on Derivative, Net
Adjusted Operating Income (Loss)
Segment Adjusted Operating Income
Operating Income (Loss)
Long-term Debt, Fair Value Disclosure
Notes Payable, Fair Value Disclosure
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Gain Gross Subtotal
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Gain Gross Subtotal
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Gain Gross Subtotal
Foreign Governments
Debt Security, Government, Non-US [Member]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Service Cost
Defined Benefit Plan, Service Cost
Group Disability
Group Disability [Member]
Group Disability
Perpetual Preferred and Equity Securities
Perpetual Preferred Securities
Equity Securities [Member]
Policy Loans
Policy Loans [Member]
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss [Table Text Block]
Common Stock, Shares Issued
Common Stock, Shares, Issued
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets Measured with Unobservable Inputs, Beginning Balance
Assets Measured with Unobservable Inputs, Ending Balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Policyholder Account Balance, Guaranteed Minimum Credit Rating
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate [Member]
Entity Information
Entity Information [Line Items]
Mortgage Loans by Property Type and Geographic Region
Mortgage Loans by Property Type and Geographic Regioin [Table Text Block]
Mortgage Loans by Property Type and Geographic Region [Table Text Block]
Gross Securities Borrowed
Security Borrowed, Subject to Master Netting Arrangement, before Offset
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change
Forwards
Forward Contracts [Member]
Adjusted Benefits and Expenses
Adjusted Benefits and Expenses
Adjusted Benefits and Expenses
Debt Securities, Available-for-sale, Allowance for credit losses for Fixed Maturity Securities
Balance, Beginning Balance
Balance, Ending Balance
Debt Securities, Available-for-Sale, Allowance for Credit Loss
Gross Unrealized Loss, Greater than 12 Months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Accumulated Other Comprehensive Income (Loss)
Comprehensive Income (Loss) Note [Text Block]
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change
Insurance Product Line
Product and Service [Domain]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales
Deferred Income Tax
Deferred Income Tax Liabilities, Net
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Current Period Provisions
Financing Receivables, Allowance for Credit Losses, Period Increase (Decrease), Commercial Mortgage Loans and Unfunded Loan Commitments
Financing Receivables, Allowance for Credit Losses, Period Increase (Decrease), Commercial Mortgage Loans and Unfunded Loan Commitments
Termination Date
Trading Arrangement Termination Date
Location and Fair Values of Derivative Financial Instruments [Abstract]
Location and Fair Values of Derivative Financial Instruments [Abstract]
Disclosure - Location and Fair Values of Derivative Financial Instruments [Abstract]
Fair Value Measurements by Input Level
Fair Value Measurements
Fair Value, Recurring and Nonrecurring [Table]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Outstanding Restricted Stock and Stock Success Unit Grant Prices Upper Limit
Outstanding Restricted Stock and Stock Success Unit Grant Prices Upper Limit
Outstanding Restricted Stock and Stock Success Unit Grant Prices Upper Limit
Derivative Assets Net of Collateral
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Cash Given as Collateral on Securities Loaned
Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Change in Foreign Currency Translation Adjustment, Tax Expense (Benefit)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Unum Poland
Unum Poland [Member]
Unum Poland [Member]
Fair Value as of Grant Date
Award Grant Date Fair Value
Liability for Future Policy Benefit, Other
Liability for Future Policy Benefit, Other
Liability for Future Policy Benefit, Other
Private Placement Fixed Maturity
Private Placement Fixed Maturity [Member]
Private Placement Fixed Maturity Securities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Other Insurance Product Line
Insurance, Other [Member]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Remaining Amount of Treasury Share Repurchases Authorized Under Stock Repurchase Program
Share Repurchase Program, Remaining Authorized, Amount
Arrangement Duration
Trading Arrangement Duration
Deferred Policy Acquisition Cost [Line Items]
Deferred Policy Acquisition Cost [Line Items]
Retail
Retail Site [Member]
Consolidation Items
Consolidation Items [Axis]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Entity Registrant Name
Entity Registrant Name
Gross Unrealized Loss, Less than 12 Months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Repurchase Agreements and Similar Transactions, Maturity Periods
Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]
Reinsurance Recoverable, Allowance for Credit Loss
Reinsurance Recoverable, Allowance for Credit Loss
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Total Revenue
Total Revenue
Revenues
Securities Given as Collateral on Financial Liabilities
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset
Cash Related to Reinsurance Agreement
Net Cash Paid in Relation to Reinsurance Agreement
Net Cash Paid in Relation to Reinsurance Agreement
Alternative Investments
Alternative Investment
Other Assets
Other Assets [Abstract]
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Dental and Vision
Dental and Vision [Member]
Dental and Vision [Member]
Quarterly/ 90 days notice [Member]
Quarterly/ 90 days notice [Member]
Quarterly redemption term with 90 day notice [Member]
Debt Securities, Available-for-sale, Credit losses on securities for which credit losses were not previously recorded
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Not Previously Recorded
Impairment Loss
Impairment of Real Estate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Movement Analysis of Deferred Policy Acquisition Costs
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Fair Values by Fair Value Hierarchy Input level
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
All Award Types
Award Type [Domain]
Aggregate fair value of all derivative instruments with credit risk-related contingent features in a liability position
Derivative, Net Liability Position, Aggregate Fair Value
Fair Values of Financial Instruments
Fair Value Disclosures [Text Block]
Fair Value, Inputs, Level 3
Fair Value, Inputs, Level 3 [Member]
Liability for Future Policy Benefit, Activity
Liability for Future Policy Benefit, Activity [Table Text Block]
Commitments to Fund Commercial Mortgage Loans
Commitments to Fund Commercial Mortgage Loans
Commitments to Fund Commercial Mortgage Loans
Transaction Type
Transaction Type [Axis]
Number of Treasury Shares Repurchased
Treasury Stock, Shares, Acquired
Realized Investment Gains and Losses Reported in Consolidated Statements of Income [Abstract]
Investment Gains and Losses Reported in Consolidated Statements of Income [Abstract]
Disclosure - Realized Investment Gains and Losses Reported in Consolidated Statements of Income [Abstract]
Geographical
Geographical [Axis]
Debt Securities, Available-for-sale, Allowance for Credit Loss
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items]
Fair Value Measured at Net Asset Value Per Share
Fair Value Measured at Net Asset Value Per Share [Member]
Liability for Future Policy Benefit, Expected Net Premium, Interest Income
Liability for Future Policy Benefit, Expected Net Premium, Interest Income
Retirement Plan Name [Domain]
Retirement Plan Name [Domain]
Other Assets
Other Assets
Financial Liabilities Offsetting Financial Assets in Balance Sheet
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Liability Offset
credit losses
credit losses
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease)
Cost of Shares Repurchased
Cost of Shares Repurchased
Treasury Stock, Value, Acquired, Cost Method
Cash and Bank Deposits at Beginning of Year
Cash and Bank Deposits at End of Period
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Cash Collateral to counterparties
Cash Collateral Posted to Counterparties
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset
Change in Deferred Acquisition Costs
Change in Deferred Acquisition Costs
Deferred Policy Acquisition Costs, Period Increase (Decrease)
Effects of Reinsurance
Effects of Reinsurance [Table]
Schedule of Reclassification out of Accumulated Other Comprehensive Income (Loss)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Non-NEOs
Non-NEOs [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Overnight and Continuous
Maturity Overnight [Member]
Dividends to Stockholders (per common share: $0.46; $0.42; $0.92; $0.84)
Dividends, Cash
Policyholder Account Balance, Interest Expense
Policyholder Account Balance, Interest Expense
Repurchase Program Authorized in February 2025
Repurchase Program Authorized in February 2025 [Member]
Repurchase Program Authorized in February 2025
Credit Spreads and Interest Rate Volatility
Credit Spreads and Interest Rate Volatility [Member]
Credit Spreads and Interest Rate Volatility
Equity, Class of Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Repurchase of Common Stock
Payments for Repurchase of Common Stock
Commercial Mortgage Loans
Collateralized Mortgage-Backed Securities [Member]
Range
Statistical Measurement [Axis]
Accelerated Share Repurchases, Cash or Stock Settlement
Accelerated Share Repurchases, Cash or Stock Settlement
Group Life
Group Life [Member]
Group Life [Member]
Location of Gains and Losses on Derivative Instruments Designated as Cash Flow Hedging Instruments
Derivative Instruments, Gain (Loss) [Table Text Block]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899
Award Type
Award Type [Axis]
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax
Available for sale Securities Debt Maturities Fair Value Gross Subtotal
Available for sale Securities Debt Maturities Fair Value Gross Subtotal
Available-for-sale Securities, Debt Maturities, Fair Value, Gross Subtotal
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Retained Earnings
Retained Earnings (Accumulated Deficit)
Insurance Product Line
Product and Service [Axis]
Repossessed Assets
Repossessed Assets
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Pension Plan
Pension Plan [Member]
Common Stock
Common Stock [Member]
Debt Securities, Available-for-Sale
Fixed Maturity Securities
Debt Securities, Available-for-sale, Total
Debt Securities, Available-for-Sale
External Credit Rating by Grouping
External Credit Rating by Grouping [Axis]
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Table]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI
Derivative Contract
Derivative Contract [Domain]
Secured Borrowings, Gross, Difference, Amount
Secured Borrowings, Gross, Difference, Amount
Less Investment Income on PFA Assets
Investment Income on PFA Assets
Investment Income Participation Fund Account Assets
Distribution by External Credit Rating for Fixed Maturity Securities [Abstract]
Distribution by External Credit Rating for Fixed Maturity Securities [Abstract]
Distribution by External Credit Rating for Fixed Maturity Securities [Abstract]
Total Liabilities and Stockholders' Equity
Liabilities and Equity
Deferred Policy Acquisition Costs by Segment
Deferred Policy Acquisition Costs [Text Block]
Distribution of the Maturity Dates for Fixed Maturity Securities [Abstract]
Distribution of the Maturity Dates for Fixed Maturity Securities [Abstract]
Disclosure - Distribution of the Maturity Dates for Fixed Maturity Securities [Abstract]
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Segments
Segments [Axis]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Asset Class
Asset Class [Axis]
Financing Receivable Origination Period
Financing Receivable Origination Period [Axis]
Financing Receivable Origination Period
Fair Value Hedges Carrying Amount of Hedged Assets and Liabilities and Cumulative Basis Adjustments
Fair Value Hedges Carrying Amount of Hedged Assets and Liabilities and Cumulative Basis Adjustments [Table Text Block]
[Table Text Block] for Fair Value Hedges Carrying Amount of Hedged Assets and Liabilities and Cumulative Basis Adjustments [Table]
Tabular List, Table
Tabular List [Table Text Block]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance
Name
Awards Close in Time to MNPI Disclosures, Individual Name
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]
Debt-to-Value
Debt-to-Value [Axis]
Investment Income [Abstract]
Investment Income [Abstract]
Investment Income [Abstract]
Market Approach
Valuation, Market Approach [Member]
Real Assets
Real Assets [Member]
Real Assets limited partnerships employ various strategies, which include investing in the equity and/or debt financing of physical assets, including infrastructure (energy, power, water/wastewater, communications), transportation (including airports, ports, toll roads, aircraft, railcars) and real estate in North America, Europe, South America, and Asia.[Member]
Other Liabilities, Carrying Value
Other Liabilities, Carrying Value
Other Liabilities, Carrying Value
Group Life and AD&D
Group Life and AD&D [Member]
Group Life and AD&D
Securities Loaned Net of Collateral
Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Available for Sale Securities Unrealized Gain Position Fair Value
Available for Sale Securities Unrealized Gain Position Fair Value [Member]
Available For Sale Securities Gross Unrealized Gain [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Extinguishment of Debt, Amount
Extinguishment of Debt, Amount
Federal Home Loan Bank, Advances
Federal Home Loan Bank, Advance, Branch of FHLBank, Amount
Hedging Designation
Hedging Designation [Axis]
Credit Facility
Credit Facility [Axis]
Assets, Fair Value Disclosure
Assets, Fair Value Disclosure
Long-term Debt
Long-term Debt
Long-Term Debt and Lease Obligation
Name
Measure Name
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense
Liability for Future Policy Benefit, Interest Expense
Pay vs Performance Disclosure [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change
Unum US
Unum US [Member]
Unum US [Member]
Fair Value Hierarchy
Fair Value Hierarchy and NAV [Domain]
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability
Debt Instrument
Debt Instrument [Line Items]
Corporate
Corporate Segment and Other Operating Segment [Member]
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Name
Trading Arrangement, Individual Name
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience
Remaining Contractual Maturity of Securities Lending Agreements
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]
Company Selected Measure Amount
Company Selected Measure Amount
Depreciation and Amortization
Depreciation, Depletion and Amortization
Total Return Swap
Total Return Swap [Member]
Retirement Plan Name [Axis]
Retirement Plan Name [Axis]
Significant Transaction
Significant Transaction [Domain]
Significant Transaction [Domain]
Non-PEO NEO
Non-PEO NEO [Member]
Foreign Currency Transactions
Gain (Loss), Foreign Currency Transaction, before Tax
Award Timing Method
Award Timing Method [Text Block]
Discontinued Hedge Accounting Due to Instrument No Longer Qualifying as Fair Value Hedge
Gain (Loss) from Hedged Firm Commitment Not Qualifying as Fair Value Hedge, Net
Net Increase (Decrease) in Cash and Bank Deposits
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Accidental Death & Dismemberment
Accidental Death Dismemberment [Member]
Accidental Death And Dismemberment [Member]
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater [Member]
Fair Values of Financial Instruments Additional Information [Abstract]
Fair Values of Financial Instruments Additional Information [Abstract]
Disclosure - Fair Values of Financial Instruments - Additional Information [Abstract]
Amortization of Net Actuarial (Gain) Loss
Defined Benefit Plan, Amortization of Gain (Loss)
Net Income
Net Income
Net Income (Loss) Attributable to Parent
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year
Restatement Determination Date:
Restatement Determination Date [Axis]
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Policy Loans
Loans, Gross, Insurance Policy
Federal Home Loan Banks [Abstract]
Federal Home Loan Banks [Abstract]
Change in Receivables
Increase (Decrease) in Receivables
Recoveries
Financing Receivable, Allowance for Credit Loss, Recovery
Class of Stock Disclosures [Abstract]
Class of Stock Disclosures [Abstract]
Assets Offsetting Securities Loaned in Balance Sheet
Security Loaned, Subject to Master Netting Arrangement, Asset Offset
Mortgage Loans (net of allowance for credit losses of $16.0; $15.9)
Mortgage Loans, Carrying Amount
Mortgage Loans on Real Estate, Commercial and Consumer, Net
Reinsurance Disclosures [Abstract]
Reinsurance Disclosures [Abstract]
Interest Rate Derivatives Contract Type
Interest Rate Derivatives Contract Type [Axis]
Interest Rate Derivatives Contract Type [Axis]
Net Increase (Decrease) in Payables for Collateral on Investments
Net Increase (Decrease) in Payables for Collateral on Investments
Net Increase (Decrease) in Payables for Collateral on Investments
Revenue
Revenues [Abstract]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Investments Additional Information [Abstract]
Investments Additional Information [Abstract]
Disclosure - Investments - Additional Information [Abstract]
Denominator
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Change in Net Unrealized Loss on Securities, Tax Expense (Benefit)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five, Net of Allowance for Credit Losses
Range
Statistical Measurement [Domain]
Policyholder Account Balance [Line Items]
Policyholder Account Balance [Line Items]
Fair Value, Assets and Liabilities Component
Fair Value, Assets and Liabilities Component [Domain]
Fair Value, Assets and Liabilities Component [Domain]
Document Fiscal Year Focus
Document Fiscal Year Focus
Derivative Assets Offsetting Derivative Liabilities in Balance Sheet
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset
Common Stock, $0.10 par; authorized: 725,000,000 shares; issued: 196,693,609 and 196,194,941 shares
Common Stock, Value, Issued
Depreciation
Depreciation, Amortization and Accretion, Net
Net Securities Borrowed Reported in Balance Sheet
Securities Borrowed
Restatement Determination Date
Restatement Determination Date
Expected Return on Plan Assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Industrial
Industrial Property [Member]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax
Mid-Atlantic
Middle Atlantic [Member]
Middle Atlantic [Member]
Amendment Flag
Amendment Flag
Cancer and Critical Illness Colonial
Cancer and Critical Illness Colonial [Member]
Cancer And Critical Illness - Colonial [Member]
New England
New England [Member]
New England [Member]
Net Investment Income
Net Investment Income
Net Investment Income
Gross Unrealized Loss
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
NumberOfReportableSegmentsDisclosedByDefinitionFlag
NumberOfReportableSegmentsDisclosedByDefinitionFlag
NumberOfReportableSegmentsDisclosedByDefinitionFlag
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance
Investments
Investments [Domain]
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Sell before Recovery
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Sell before Recovery
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Entity Address, State or Province
Entity Address, State or Province
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances [Table]
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances [Table]
PEO Total Compensation Amount
PEO Total Compensation Amount
Liability for Future Policy Benefit, before Reinsurance, before Other
Liability for Future Policy Benefit, before Reinsurance, before Other
Liability for Future Policy Benefit, before Reinsurance, before Other
Share Repurchase Program
Share Repurchase Program [Domain]
Weighted Average Common Shares - Basic
Weighted Average Number of Shares Outstanding, Basic
Derivative, Notional Amount
Derivative, Notional Amount
Gross Securities Loaned
Security Loaned, Subject to Master Netting Arrangement, before Offset
Carrying Amounts and Estimated Fair Value of Financial Instruments Not Measured at Fair Value
Fair Value, by Balance Sheet Grouping [Table]
Deferred Policy Acquisition Cost
Increase (Decrease) in Deferred Policy Acquisition Costs
Debt Securities, Available-for-sale, Allowance for Credit Loss
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table Text Block]
Investments
Investments
Investments [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10
Income Tax Payable
Taxes Payable
Available for sale Securities Debt Maturities Amortized Cost Gross Subtotal, Net
Available for sale Securities Debt Maturities Amortized Cost Gross Subtotal, Net
Available for sale Securities Debt Maturities Amortized Cost Gross Subtotal, Net of Allowance for Credit Losses
Life
Life Insurance Product Line [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Class of Stock
Class of Stock [Axis]
Change in Insurance Liabilities
Increase (Decrease) in Insurance Liabilities
Line of Credit Facility, Maximum Borrowing Capacity
Line of Credit Facility, Maximum Borrowing Capacity
Segment Adjusted Operating Revenue
Segment Adjusted Operating Revenue
Segment Adjusted Operating Revenue
Less Investment Expenses
Investment Income, Investment Expense
Treasury Stock - at cost: 38,389,539 and 30,500,524 shares
Treasury Stock, Value
Write-offs
Financing Receivable, Allowance for Credit Loss, Writeoff
Securities Loaned and Securities Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement
Securities Loaned and Securities Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement
Fair Value Inputs Level 2 Or Level 3
Fair Value Inputs Level 2 Or Level 3 [Member]
Fair Value Inputs Level 2 Or Level 3 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table Text Block]
Change in Income Taxes
Increase (Decrease) in Income Taxes Payable
Net Cash Provided (Used) by Investing Activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Allowance for Credit Losses, Unfunded Mortgage Loan Commitments
Accounts and Financing Receivable, Allowance for Credit Loss
Cash Collateral from Counterparties
Cash Collateral from Counterparties
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Stockholders' Equity Disclosure
Equity [Text Block]
6.250% Junior Subordinated Notes due 2058
6.250% Junior Subordinated Notes due 2058 [Member]
Notes payable due 2058
Loan To Value Ratio Above 75 To 85 Percent
Loan To Value Ratio Above 75 To 85 Percent [Member]
Loan To Value Ratio Above 75 To 85 Percent [Member]
Security Exchange Name
Security Exchange Name
Loan to Value Ratio Below or Equal to 65 Percent
Loan to Value Ratio Below or Equal to 65 Percent [Member]
Loan to Value Ratio Below or Equal to 65 Percent [Member]
Commissions Paid on Stock Repurchases
Shares Repurchased Commissions
Fees and Commissions Expenses
Financing Receivable, before Allowance for Credit Loss
Financing Receivable, before Allowance for Credit Loss, Mortgage Loans
Financing Receivable, before Allowance for Credit Loss
Valuation Approach and Technique
Valuation Approach and Technique [Axis]
Liabilities, Fair Value Disclosure
Liabilities, Fair Value Disclosure
Real Estate Held-for-sale
Real Estate, Held-for-Sale
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Unrelated to Significant Transaction
Unrelated to Significant Transaction [Member]
Unrelated to Significant Transaction
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Name
Outstanding Recovery, Individual Name
Available for Sale Securities Unrealized Gain Position Gross Gain
Available for Sale Securities Unrealized Gain Position Gross Gain
Available-For-Sale Securities, Debt Maturities Unrealized Gain Position Gross Gain Abstract
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
Other Postretirement Benefit Plan
Other Postretirement Benefit Plan [Member]
Other Postretirement Benefit Plan
Securities Given as Collateral on Derivative Liabilities
FMS Collateral Posted to Counterparties
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599
Geographical
Geographical [Domain]
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]
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Stockholders Equity and Earnings Per Common Share Additional Information [Abstract]
Stockholders Equity and Earnings Per Common Share Additional Information [Abstract]
Disclosure - Stockholders' Equity and Earnings Per Common Share - Additional Information [Abstract]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance
Schedule of Investments
Schedule of Investments [Table]
Gross Gains on Sales
Mortgage Loans and Other Invested Assets Gross Realized Gains
This item represents the gross profit realized on the sale of investments not otherwise specified in the taxonomy
Other Long-term Investments
Other Long-Term Investments
Pricing Service
Pricing Service [Member]
Pricing Service [Member]
Purchases of Other Investments
Payments to Acquire Other Investments
Other Products [Member]
Other Products [Member]
Other Products
Unrecognized Pension and Postretirement Benefit Costs
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Fixed Maturity Securities
Debt Securities [Member]
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Asset Class
Asset Class [Domain]
South Atlantic
South Atlantic [Member]
South Atlantic [Member]
Mortgage Loans on Real Estate Schedule
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table]
Compensation Amount
Outstanding Recovery Compensation Amount
B Credit Rating
B Credit Rating [Member]
B Credit Rating
Individual:
Individual [Axis]
Weighted Average Common Shares - Assuming Dilution
Weighted Average Number of Shares Outstanding, Diluted
Policyholder Account Balance, before Reserves in excess of Account Balance, Beginning of Year
Policyholder Account Balance, before Reserves in excess of Account Balance, End of Period
Policyholder Account Balance, before Reserves in excess of Account Balance, End of Period
Policyholder Account Balance, before Reserves in excess of Account Balance
Policyholder Account Balance, before Reserves in excess of Account Balance
Entity Emerging Growth Company
Entity Emerging Growth Company
Financing Receivable, Originated in Current Fiscal Year
Financing Receivable, Year One, Originated, Current Fiscal Year
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Derivative Financial Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Credit Exposure on Derivatives
Fair Value, Concentration of Risk, Derivative Instruments, Assets
Mortgage Loans
Mortgage Receivable [Member]
Available for Sale Securities Unrealized Loss Position Fair Value
Available for Sale Securities Unrealized Loss Position Fair Value [Member]
Available For Sale Securities Gross Unrealized Loss [Member]
Gross Derivative Liability
Liability Derivatives Fair Value
Derivative Liability, Subject to Master Netting Arrangement, before Offset
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Fair Value
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Fair Value [Axis]
Debt Securities, Available-for-sale, Unrealized Gain (Loss), Fair Value [Axis]
Redemption Term
Redemption Term [Domain]
[Domain] for Disclosure of information about partnership equity securities with redemption features. [Axis]
Financing Receivable, Modified in Period, Amount
Financing Receivable, Modified in Period, Amount
Accrued Investment Income
Accrued Investment Income Receivable
Liability for Future Policy Benefit, Gross Premium Income
Liability for Future Policy Benefit, Gross Premium Income
Treasury Stock, Common
Treasury Stock, Common [Member]
Letters of Credit Outstanding, Amount
Letters of Credit Outstanding, Amount
Debt Securities, Available-for-sale
Debt Securities, Available-for-Sale [Line Items]
Federal Home Loan Bank Common Stock Carrying Amounts, Amounts Posted, and Advances Received
Federal Home Loan Bank Common Stock Carrying Amounts, Amounts Posted, and Advances Received [Table Text Block]
Federal Home Loan Bank Common Stock Carrying Amounts, Amounts Posted, and Advances Received [Table Text Block]
Financing Receivable, Originated Two Years before Latest Fiscal Year
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year
Available For Sale Securities Debt Maturities Within One Year Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities Within One Year Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities Within One Year Unrealized Loss Position Gross Loss
Repurchase Program Authorized in July 2024
Repurchase Program Authorized in July 2024 [Member]
Repurchase Program Authorized in July 2024
Spread of Swap Curve
Input Measurement, Spread of Swap Curve [Member]
Measurement input using the change in the weighted average credit spread to the swap curve for the assets backing the hypothetical loan.
All Executive Categories
All Executive Categories [Member]
Valuation Approach and Technique
Valuation Approach and Technique [Domain]
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Receive Fixed/Pay Fixed
Derivative Financial Instruments Receive Fixed Pay Fixed [Member]
Derivative Financial Instruments, Receive Fixed Pay Fixed [Member]
Embedded Derivative in Modified Coinsurance Arrangement
Embedded Derivative Financial Instruments [Member]
Schedule of Net Benefit Costs
Schedule of Net Benefit Costs [Table Text Block]
Financing Receivable Origination Period
Financing Receivable Origination Period [Domain]
Financing Receivable Origination Period
Mortgage Loans, Percent of Total
Percentage of loan portfolio
Percentage Of Loan Portfolio
Schedule of Basic and Diluted Earnings Per Share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range
Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Domain]
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Deferred Policy Acquisition Cost
Deferred Policy Acquisition Cost, Capitalization
Segment Information
Segment Reporting [Text Block]
Proceeds from Maturities of Fixed Maturity Securities
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale
Minimum
Minimum [Member]
Investment Type
Investment Type [Axis]
Alternative Investments, Unfunded Commitments
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Gain Position Gross Gain
Other Observable Market Data
Other Observable Market Data [Member]
Other Observable Market Data [Member]
Liabilities
Liabilities [Abstract]
Offsetting Securities Borrowed [Abstract]
Offsetting Securities Borrowed [Abstract]
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Policyholder Account Balance, Premium Received
Policyholder Account Balance, Premium Received
Private Equity Partnerships
Partnership Interest [Member]
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]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivatives
Derivative [Member]
Offsetting Securities Loaned [Abstract]
Offsetting Securities Loaned [Abstract]
Other Liabilities
Other Liabilities
Net Periodic Benefit Cost (Credit)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Apartment
Apartment Building [Member]
Deferred Policy Acquisition Cost [Table]
Deferred Policy Acquisition Cost [Table]
Financing Receivable, Allowance for Credit Loss, Mortgage Loans
Financing Receivable, Allowance for Credit Loss [Table]
Common Stock, Shares Authorized
Common Stock, Shares Authorized
Real Estate Investment Property, Net
Real Estate Investment Property, Net
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gross Gains on Sales
Debt Securities, Available-for-Sale, Realized Gain
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10
West North Central
West North Central [Member]
West North Central [Member]
Exercise Price
Award Exercise Price
Fair Value, Measurements, Recurring
Fair Value, Recurring [Member]
DeferredLossOnReinsurance
DeferredLossOnReinsurance
DeferredLossOnReinsurance
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program
Share Repurchase Program, Authorized, Amount
Segment Reporting
Segment Reporting [Line Items]
Document Quarterly Report
Document Quarterly Report
Repurchase Agreements and Similar Transactions, Maturity Periods
Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]
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]
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
States, Municipalities, and Political Subdivisions
US States and Political Subdivisions Debt Securities [Member]
Proceeds from Sale of Debt Securities, Available-for-sale
Proceeds from Sale of Debt Securities, Available-for-Sale
Income Before Income Tax
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Repayments of Long-term Debt
Repayments of Long-Term Debt
Management Fee Expense
Management Fee Expense
DeferredGainOnReinsurance
DeferredGainOnReinsurance
DeferredGainOnReinsurance
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Equity Component
Equity Component [Domain]
Deferred Acquisition Costs
Deferred Acquisition Costs at Beginning of Year
Deferred Acquisition Costs at End of Period
Deferred Policy Acquisition Cost
Measurement Input Type
Measurement Input Type [Domain]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Foreign Exchange Contracts
Foreign Exchange Contract [Member]
Policy Loans, Fair Value Disclosure
Loans Receivable, Fair Value Disclosure
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings
Benefits and Expenses
Benefits, Losses and Expenses [Abstract]
Adoption Date
Trading Arrangement Adoption Date
Share Repurchases Excise Tax
Share Repurchases Excise Tax
Share Repurchases Excise Tax
Equity Securities
Equity Securities, FV-NI, Current
Title
Trading Arrangement, Individual Title
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Loss Position Gross Loss
Financial Assets Offsetting Financial Liabilities in Balance Sheet
Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Asset Offset
Other, Net
Proceeds from (Payment for) Other Financing Activity
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Proceeds from Sales and Maturities of Other Investments
Proceeds from Sale and Maturity of Other Investments
Derivative Instruments, Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Letter of Credit
Letter of Credit [Member]
Commitments and Contingencies Disclosure
Commitments and Contingencies Disclosure [Text Block]
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Accelerated Share Repurchases, Date
Accelerated Share Repurchases, Date [Axis]
Policyholder Account Balance, Policy Charge
Policyholder Account Balance, Policy Charge
Weighted Average
Weighted Average [Member]
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Net Cash Provided by Operating Activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 [Member]
Future Policy Benefits
Liability for Future Policy Benefit, before Reinsurance
Securities Received as Collateral
Securities Received as Collateral
Income Statement [Abstract]
Income Statement [Abstract]
Stockholders' Equity
Equity, Attributable to Parent [Abstract]
Document Transition Report
Document Transition Report
Liability for Future Policy Benefit, Weighted-Average Duration
Liability for Future Policy Benefit, Weighted-Average Duration
Gain (Loss) on Investments
Net Investment Loss
Net Investment Gain (Loss)
Gain (Loss) on Investments
Deferred Income Tax
Deferred Income Tax Assets, Net
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Reinsurance Recoverable (net of allowance for credit losses of $0.5; $1.4)
Reinsurance Recoverable
Reinsurance Recoverables, Including Reinsurance Premium Paid
Significant Transaction
Significant Transaction [Axis]
Significant Transaction
City Area Code
City Area Code
Amortization of Prior Service Credit
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses
Subsequent Events
Subsequent Events [Text Block]
Private Equity Fund Type
Private Equity Fund Type [Domain]
[Domain] for Private Equity Fund Type [Axis]
Other Property
Other Property [Member]
Derivative Purpose [Domain]
Derivative Purpose [Domain]
Derivative Purpose [Domain]
Name
Forgone Recovery, Individual Name
Heirarchy Level Combination
Heirarchy Level Combination [Domain]
[Domain] for Heirarchy Level Combination [Axis]
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Redemption Term
Redemption Term [Axis]
Disclosure of information about partnership equity securities with redemption features. [Axis]
Issued Shares of Preferred Stock
Preferred Stock, Shares Issued
Disclosure Mortgage Loans by Property Type [Abstract]
Disclosure Mortgage Loans by Property Type [Abstract]
Disclosure - Mortgage Loans by Property Type [Abstract]
Policyholder Account Balance [Table]
Policyholder Account Balance [Table]
Amortization of Prior Service Credit
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Policyholder Account Balance, After reinsurance recoverable
Policyholder Account Balance, After reinsurance recoverable
Policyholder Account Balance, After reinsurance recoverable
Financing Receivable, Credit Quality Indicator, Mortgage Loans
Financing Receivable, Credit Quality Indicator [Table]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, 90 Days or More Past Due, Still Accruing
Mortgage Loans, Fair Value Disclosure
Loan, Mortgage, Held-for-Sale, Fair Value Disclosure
Policyholder Account Balance, Guaranteed Minimum Credit Rating
Policyholder Account Balance, Guaranteed Minimum Credit Rating
Net Sales and Maturities of Short-term Investments
Payments for (Proceeds from) Short-Term Investments
West South Central
West South Central [Member]
West South Central [Member]
Liability for Future Policy Benefit, after Reinsurance
Liability for Future Policy Benefit, after Reinsurance
NEW YORK STOCK EXCHANGE, INC.
NEW YORK STOCK EXCHANGE, INC. [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500
Number of Fixed Maturity Securities in an Unrealized Loss Position Continuously for Over One Year
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions
Derivative Liabilities Offsetting Derivative Assets in Balance Sheet
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total Investments
Investments
hedged asset, amortized cost
hedged asset, amortized cost
hedged asset, amortized cost
Amortization of Deferred Loss on Reinsurance
Amortization of Deferred Loss on Reinsurance
Amortization of Deferred Loss on Reinsurance
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Financing Receivable, Originated Four Years before Latest Fiscal Year
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year
Financing Receivable, Originated Three Years before Latest Fiscal Year
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year
Net Unrealized Loss on Securities
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Quantitative Information Regarding Significant Unobservable Inputs
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Table]
Entity Current Reporting Status
Entity Current Reporting Status
Net Cash Used by Financing Activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Total Shareholder Return Amount
Total Shareholder Return Amount
Deferral of Acquisition Costs
Deferral of Acquisition Costs
Deferral of Acquisition Costs
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax
Cash Flow Hedging
Cash Flow Hedging [Member]
Financing Receivable, Originated Five or More Years before Latest Fiscal Year
Financing Receivable, Originated, More than Five Years before Current Fiscal Year
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Financing Receivable, Modified, Weighted-Average Term Increase from Modification
Financing Receivable, Modified, Weighted-Average Term Increase from Modification
Cash Flows from Financing Activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Property and Equipment
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10, Net
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10, Net of Allowance for Credit Losses
Interest Cost
Defined Benefit Plan, Interest Cost
Voluntary Benefits
Voluntary Benefits [Member]
Voluntary Benefits [Member]
Net Investment Income
Net Investment Income [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)
Financial Instrument
Financial Instruments
Financial Instruments [Domain]
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 [Member]
Derivative Assets
Net Derivative Assets Reported in Balance Sheet
Derivative Asset
Other Income
Other Income
Offsetting [Abstract]
Underlying Securities
Award Underlying Securities Amount
Common Stock Activity
Stock Issued During Period, Value, New Issues
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]
Cash and Bank Deposits
Cash
ASR prepayment amount
Accelerated Share Repurchases, Settlement (Payment) or Receipt
Cash Received as Collateral on Financial Assets
Derivative Asset, Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Policyholder Account Balance, Increase (Decrease) from Other Change
Policyholder Account Balance, Increase (Decrease) from Other Change
Segment Reporting
Segment Reporting [Table]
Income Tax
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Private Credit
Private Credit [Member]
Private Credit limited partnerships employ various investment strategies, generally providing direct lending or other forms of debt financing including first-lien, second-lien, mezzanine, and subordinated loans. [Member]
Cash
Cash [Member]
Amortized Cost and Fair Values of Securities by Security Type
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
All Trading Arrangements
All Trading Arrangements [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Other Performance Measure, Amount
Other Performance Measure, Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Current Fiscal Year End Date
Current Fiscal Year End Date
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Derivative
Derivative [Line Items]
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
BBB Credit Rating
BBB Credit Rating [Member]
BBB Credit Rating
Entity File Number
Entity File Number
Office
Office Building [Member]
Distribution of the Maturity Dates for Fixed Maturity Securities
Investments Classified by Contractual Maturity Date [Table Text Block]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Measure:
Measure [Axis]
Treasury Stock, Common, Shares
Treasury Stock, Common, Shares
Premium Income
Premiums Earned, Net
Numerator
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract]
Equity Components
Equity Components [Axis]
Other Expenses
Other Cost and Expense, Operating
Other Policyholders’ Funds
Other Policyholders’ Funds
Other Policyholders’ Funds
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3
Component of Derivative Gain (Loss) Excluded from the Assessment of Hedge Effectiveness
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net
Unfunded Mortgage Loan Commitments
Unfunded Mortgage Loan Commitments [Member]
Unfunded Mortgage Loan Commitments
Common Class A
Common Class A [Member]
Negative Ceding Commission
Negative Ceding Commission
Negative Ceding Commission
Entity Interactive Data Current
Entity Interactive Data Current
Effects of Reinsurance
Effects of Reinsurance [Line Items]
Pacific
Pacific [Member]
Pacific [Member]
Fixed Maturity Securities
Available-for-Sale Securities [Member]
Entity Small Business
Entity Small Business
Comprehensive Income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Unearned Premiums
Unearned Premiums
Derivative Credit Risk Valuation Adjustment, Derivative Assets
Derivative Credit Risk Valuation Adjustment, Derivative Assets
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Individual Disability
Individual Disability [Member]
Individual Disability
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense
Document Type
Document Type
Commissions
Insurance Commissions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Distribution by External Credit Rating for Fixed Maturity Securities
Available for Sale Debt Securities by External Credit Rating [Table Text Block]
Available for Sale Debt Securities by External Credit Rating [Table Text Block]
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI
Fair Value Inputs Other Than Level 1
Fair Value Inputs Other Than Level 1 [Member]
Fair Value Inputs Other Than Level 1 [Member]
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Local Phone Number
Local Phone Number
Other Postretirement Benefit Plans
Other Postretirement Benefits Plan [Member]
Total Financial Instrument Liabilities Not Carried at Fair Value
Total Financial Instrument Liabilities Not Carried at Fair Value
Total Financial Instrument Liabilities Not Carried at Fair Value
Short-term Investments
Other Short-Term Investments
Commitments and Contingent Liabilities - Note 13
Commitments and Contingencies
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Reclassification out of Accumulated Other Comprehensive Income (Loss)
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Policyholders' Account Balance
Policyholder Account Balance
Executive Category:
Executive Category [Axis]
Liabilities and Stockholders' Equity
Liabilities and Equity [Abstract]
Reinsurance
Reinsurance [Text Block]
Liabilities Offsetting Securities Borrowed in Balance Sheet
Security Borrowed, Subject to Master Netting Arrangement, Liability Offset
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change
Debt and Other Disclosures [Abstract]
Debt and Other Disclosures
External Credit Rating, Below-Investment-Grade
External Credit Rating, Noninvestment Grade [Member]
PEO Name
PEO Name
Net Loss on Derivatives
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Credit Exposure
Credit Exposure [Domain]
[Domain] for Credit Exposure [Axis]
Other Segment Items
Segment Reporting, Other Segment Item, Amount
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Entity Tax Identification Number
Entity Tax Identification Number
Derivative Instruments and Hedging Activities Disclosures [Table]
Derivative Instruments and Hedging Activities Disclosures [Table]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range
Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis]
Policyholder Account Balance, Benefit Payment
Policyholder Account Balance, Benefit Payment
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Accident, Sickness, and Disability
Accident and Health Insurance Product Line [Member]
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
External Credit Rating, Investment Grade
External Credit Rating, Investment Grade [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table]
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Derivative Purpose [Axis]
Derivative Purpose [Axis]
Derivative Purpose
Heirarchy Level Combination
Heirarchy Level Combination [Axis]
Heirarchy Level Combination [Axis]
Fair Value, Measurement Frequency
Measurement Frequency [Domain]
Compensation Expense
Labor and Related Expense
Policyholder Account Balance, Cash Surrender Value
Policyholder Account Balance, Cash Surrender Value
Location and Fair Values of Derivative Financial Instruments
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Basic
Earnings Per Share, Basic
Measurement Input Type
Measurement Input Type [Axis]
Originated Five or More Years before Last Fiscal Year
Originated Five or More Years before Last Fiscal Year [Member]
Originated Five or More Years before Last Fiscal Year
Insider Trading Arrangements [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Treasury Stock Transactions
Class of Treasury Stock [Table Text Block]
U.K. Pension Plan
U.K. Pension Plan [Member]
U.K. Pension Plan
Loan To Value Ratio Above 65 To 75 Percent
Loan To Value Ratio Above 65 To 75 Percent [Member]
Loan To Value Ratio Above 65 To 75 Percent [Member]
Amortization of Deferred Acquisition Costs
Deferred Policy Acquisition Costs, Amortization Expense
Deferred Policy Acquisition Costs, Amortization Expense
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]
Mortgage Loans on Real Estate
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage Loan Property Type
Real Estate, Type of Property [Axis]
Originated Two Years before Last Fiscal Year
Originated Two Years before Last Fiscal Year [Member]
Originated Two Years before Last Fiscal Year
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Cover page.
Cover [Abstract]
Miscellaneous Long-Term Investments, Carrying Value
Miscellaneous Long-Term Investments, Carrying Value
Miscellaneous Long-Term Investments, Carrying Value
Insurance [Abstract]
Insurance [Abstract]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Hedging Relationship
Hedging Relationship [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Strategic Actions included within net investment income
Strategic Actions included within net investment income
Strategic Actions included within net investment income
Accelerated Share Repurchases, Date
Accelerated Share Repurchases, Date [Domain]
Fair Value Maturity Distribution
Fair Value Maturity Distribution [Abstract]
Fair Value Maturity Distribution [Abstract]
Ceded Policy Loans
Policy Loans Ceded to Reinsurers
Loans ceded to reinsurers. These loans use insurance policy funds such as cash surrender values as collateral.
Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss
Hedged Asset, Fair Value Hedge, Cumulative Increase
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)
Short-term Investments
Short-Term Investments [Member]
Authorized Shares of Preferred Stock
Preferred Stock, Shares Authorized
Private Equity Fund Type
Private Equity Fund Type [Axis]
Private Equity Fund Type [Axis]
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Forward Benchmark Interest Rate Lock
Forward Benchmark Interest Rate Lock [Member]
Forward Benchmark Interest Rate Lock
Share Repurchase Program
Share Repurchase Program [Axis]
Hedging Designation
Hedging Designation [Domain]
Class of Stock
Class of Stock [Domain]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Foreign Exchange Forward
Foreign Exchange Forward [Member]
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 [Member]
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199
Securities Borrowed Net of Collateral
Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction
Other, Net
Other Noncash Income (Expense)
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances [Line Items]
[Line Items] for Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances [Table]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Debt Securities, Available-for-sale, Allowance for Credit Loss
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table]
Interest Rate Derivative Contract Type
Interest Rate Derivative Contract Type [Domain]
Interest Rate Derivative Contract Type [Domain]
Retirement Plan Type
Retirement Plan Type [Domain]
Entity Filer Category
Entity Filer Category
Securities Received as Collateral on Securities Borrowed
Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset
Credit Exposure
Credit Exposure [Axis]
Credit Exposure [Axis]
Basis of Presentation
Basis of Accounting [Text Block]
Proceeds from Policyholder Account Deposits
Additions to Contract Holders Funds
Not Designated as Hedging Instrument
Not Designated as Hedging Instrument [Member]
BB Credit Rating
BB Credit Rating [Member]
BB Credit Rating [Member]
Investments, Debt and Equity Securities [Abstract]
Investments, Debt and Equity Securities [Abstract]
Investment Gains and Losses Reported in Consolidated Statements of Income
Gain (Loss) on Securities [Table Text Block]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice
Quarterly after 5.5 year lock with 90 days notice [Member]
Quarterly after 5.5 year lock with 90 days notice
Gross Investment Income, Operating
Gross Investment Income, Operating
Outstanding Restricted Stock and Stock Success Unit Grant Prices Lower Limit
Outstanding Restricted Stock and Stock Success Unit Grant Prices Lower Limit
Outstanding Restricted Stock and Stock Success Unit Grant Prices Lower Limit
Derivative Liabilities
Net Derivative Liabilities Reported in Balance Sheet
Derivative Liability
Entity Address, Address Line One
Entity Address, Address Line One
Total Benefits and Expenses
Benefits, Losses and Expenses
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net of Allowance for Credit Losses
Total Income Tax
Income Tax Expense (Benefit)
Income Tax Expense (Benefit)
Fair Value Hedging
Fair Value Hedging [Member]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change
Offsetting Derivative Liabilities
Offsetting Derivative Liabilities [Abstract]
Originated Four Years before Last Fiscal Year
Originated Four Years before Last Fiscal Year [Member]
Originated Four Years before Last Fiscal Year
Accounting Developments
Accounting Standards Update and Change in Accounting Principle [Text Block]
Fixed maturity securities in unrealized loss position percent of total
Fixed maturity securities in unrealized loss position percent of total
This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities expressed as a percentage.
Discounted Cash Flow
Valuation Technique, Discounted Cash Flow [Member]
Statement
Statement [Table]
Public Utilities
Public Utility, Bonds [Member]
Adjusted Net Investment Income
Adjusted Net Investment Income
Adjusted Net Investment Income
Originated Three Years before Last Fiscal Year
Originated Three Years before Last Fiscal Year [Member]
Originated Three Years before Last Fiscal Year
Derivative Instruments and Hedging Activities Disclosures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash Received as Collateral on Securities Borrowed
Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset
Derivative Asset, Fair Value, Gross Asset
Asset Derivatives Fair Value
Derivative Asset, Subject to Master Netting Arrangement, before Offset
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance
Policyholder Account Balance [Roll Forward]
Policyholder Account Balance [Roll Forward]
Derivatives Measured with Unobservable Inputs, Beginning Balance
Derivatives Measured with Unobservable Inputs, Ending Balance
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs
Other Long-term Investments
Other Long-Term Investments [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]