Balance, beginning of period Balance, end of period Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change Interest expense on advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-Term Revision of Prior Period [Axis] Revision of Prior Period [Axis] Other contract holder funds Total other contract holder funds Other Policyholder Funds Hotel Hotel [Member] BBB NRSRO, BBB Rating [Member] NRSRO, BBB Rating Percent of total debt securities carrying value Debt and Equity Securities, FV-NI [Line Items] Net realized losses (gains) on investments Net realized investment gains (losses) Realized Investment Gains (Losses) Change in current discount rate related to reserve for future policy benefits, net of tax expense (benefit) OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, Tax Other future policy benefits and claims payable Liability For Future Policy Benefit, Before Reinsurance, Other Insurance And Annuity Liabilities Liability For Future Policy Benefit, Before Reinsurance, Other Insurance And Annuity Liabilities Award Timing Predetermined Award Timing Predetermined [Flag] Change in net unrealized gains (losses) on securities not impaired, tax expense (benefit) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Entity File Number Entity File Number Policy loans Loans, Gross, Insurance Policy, Excluding At Fair Value Under Fair Value Option Loans, Gross, Insurance Policy, Excluding At Fair Value Under Fair Value Option Additional Paid-In Capital Additional Paid-in Capital [Member] Non-cash financing activities Noncash Financing Items [Abstract] Noncash Financing Items Tabular List, Table Tabular List [Table Text Block] Tax expense recorded to other comprehensive income Other Comprehensive Income (Loss), Tax Total assets Funds Held Under Reinsurance Agreements, Asset (Liability), Net Funds Held Under Reinsurance Agreements, Asset (Liability), Net New Accounting Pronouncements – Issued but Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] External External Pricing Source [Member] External Pricing Source Other Other Operating Gain (Loss) Other Operating Gain (Loss) Due after 5 years through 10 years Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Five Through Year Ten Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Five Through Year Ten Schedule of Fair Value and Carrying Value of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Debt Securities Debt securities, available-for-sale Debt Securities [Member] Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other asset-backed securities Other Asset-Backed Securities [Member] Other Asset-Backed Securities Schedule of Long Term and Short Term Debt Instruments [Line Items] Schedule of Long Term and Short Term Debt Instruments [Line Items] Schedule of Long Term and Short Term Debt Instruments Dividends on preferred stock Payments of Ordinary Dividends, Preferred Stock and Preference Stock Limited partnerships Investments in Limited Partnerships and Alternative Investments Investments in Limited Partnerships and Alternative Investments Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Due after 10 years through 20 years Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Ten Through Year Twenty Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Ten Through Year Twenty Policyholder Account Balance [Roll Forward] Policyholder Account Balance [Roll Forward] Interest accrual Liability for Future Policy Benefit, Expected Net Premium, Interest Income Subprime Subprime [Member] Securities loaned Securities Loaned, Fair Value Disclosure Securities Loaned, Fair Value Disclosure Other asset-backed securities Other asset-backed securities Asset-Backed Securities, Other [Member] Asset-Backed Securities, Other Aggregate fair value of securities sold at a loss Aggregate Fair Value Of Securities Sold At A Loss Aggregate Fair Value Of Securities Sold At A Loss Adjustment to Compensation, Amount Adjustment to Compensation Amount Investment management arrangement, automatic renewal term Investment Management Arrangement, Automatic Renewal Term Investment Management Arrangement, Automatic Renewal Term Less than 12 months, fair value Debt Securities, Continuous Unrealized Loss Position, Less Than 12 Months Debt Securities, Continuous Unrealized Loss Position, Less Than 12 Months 1 Basis Point-50 Basis Points Above Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 [Member] Consolidation Consolidation, Policy [Policy Text Block] Contributions from partners of consolidated investments Proceeds from Contributions from Affiliates Share-based compensation Share-Based Payment Arrangement, Noncash Expense Contractual/Notional Amount Derivative Asset, Notional Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Consolidated net worth percentage Debt Instrument, Consolidated Net Worth Percentage Debt Instrument, Consolidated Net Worth Percentage Debt maximum issuable amount Debt Instrument, Maximum Issuable Amount Debt Instrument, Maximum Issuable Amount Total shareholders' equity Equity, Attributable to Parent Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Common stock, authorized (in shares) Common Stock, Shares Authorized Effective income tax rate Effective Income Tax Rate Reconciliation, Excluding Non-Controlling Interest, Percent Effective Income Tax Rate Reconciliation, Excluding Non-Controlling Interest, Percent Money Market Separate Account, Money Market Funds [Member] Separate Account, Money Market Funds Deferral of acquisition costs Deferral of acquisition costs Deferral Of Acquisition Costs And Sales Inducement Assets Deferral Of Acquisition Costs And Sales Inducement Assets Securities on deposit with regulatory authorities Securities Reserve Deposit Required and Made Variable annuity Variable Annuity Variable Annuities Variable Annuity [Member] Liabilities and Equity Liabilities and Equity [Abstract] Medium term notes Medium-Term Note [Member] Reserves Funds Held under Reinsurance Agreements, Asset Cover [Abstract] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Beginning of period cumulative effect of changes in discount rate assumptions End of period cumulative effect of changes in discount rate assumptions AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax Less: Net income (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Investment, Variable Interest Rate, Type [Extensible Enumeration] Investment, Variable Interest Rate, Type [Extensible Enumeration] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Composition of Fair Value of Debt Securities Classified by Rating Schedule Of Composition Of Fair Value Of Debt Securities Classified By Rating [Table Text Block] Schedule Of Composition Of Fair Value Of Debt Securities Classified By Rating Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Amortization of deferred acquisition costs Amortization of deferred acquisition costs Expense (Income) From Amortization Of Deferred Acquisition Costs Expense (Income) From Amortization Of Deferred Acquisition Costs Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 30-89 Days Past Due Financing Receivables 30 To 89 Days Past Due [Member] Financing Receivables 30 To 89 Days Past Due Extension of term Financing Receivable, Modified, Weighted Average Term Increase from Modification Pretax income (loss) Pretax adjusted operating earnings Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Utilization Measurement Input, Utilization Rate [Member] Additions from purchase of PCD mortgage loans Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase Reserves for future policy benefits, after reinsurance recoverable Liability for Future Policy Benefit, after Reinsurance Other investment income Other Investment [Member] Other Investment Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Unrealized Tax Losses, Available-For-Sale Securities Unrealized Tax Losses, Available-For-Sale Securities [Member] Unrealized Tax Losses, Available-For-Sale Securities Less: Comprehensive income (loss) attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Change in unrealized gains (losses) - other OCI, Other, Unrealized Gain (Loss), Before Reclassifications, Net Of Tax OCI, Other, Unrealized Gain (Loss), Before Reclassifications, Net Of Tax Institutional Products Institutional Products [Member] Institutional Products Letter of credit Letter of Credit [Member] Deferred Policy Acquisition Cost [Line Items] Deferred Policy Acquisition Cost [Line Items] Other borrowings on mortgage-related securities and commercial mortgage loans Borrowings On Mortgage-Related Securities And Commercial Mortgage Loans Borrowings On Mortgage-Related Securities And Commercial Mortgage Loans Document Fiscal Period Focus Document Fiscal Period Focus Market risk benefit liabilities Market Risk Benefit, Liability Amount [Member] Market Risk Benefit, Liability Amount Schedule of Fair Value Option Fair Value Option, Disclosures [Table Text Block] Award Timing Method Award Timing Method [Text Block] Debt securities, available for sale, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Award Type Award Type [Axis] Deferred acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Senior Notes 2036 And 2056 Senior Notes Due 2036 And 2056 [Member] Senior Notes Due 2036 And 2056 Interest accrual Interest Expense Additional Liability, Long-Duration Insurance, Interest Income (Expense) Reductions for mortgages disposed Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Loan Sold Trading Symbol Trading Symbol Accrued interest written off Financing Receivable, 90 Days or More Past Due, Still Accruing, Writeoff Financing Receivable, 90 Days or More Past Due, Still Accruing, Writeoff Total return swaps Total Return Swap [Member] Debt Service Coverage Ratios [Domain] Debt Service Coverage Ratios [Domain] Debt Service Coverage Ratios [Domain] Share-based compensation programs (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Other impaired securities AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Parent [Member] Net Amounts Presented in the Condensed Consolidated Balance Sheets Securities Sold under Agreements to Repurchase, Collateral Upgrade Securities Sold under Agreements to Repurchase, Collateral Upgrade Market risk benefit liabilities, at fair value Market risk benefit liabilities Market risk benefit - liabilities Market Risk Benefit, Liability, Amount Entity Address, City or Town Entity Address, City or Town Weighted average current discount rate Additional Liability, Long-Duration Insurance, Current Weighted-Average Discount Rate Securities lending Offsetting Securities Loaned [Abstract] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] Closed Block Life Liability For Future Policy Benefit, Before Reinsurance, Additional Liabilities For Insurance Guarantees Liability For Future Policy Benefit, Before Reinsurance, Additional Liabilities For Insurance Guarantees Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Settlements related to deferred premium on derivatives Amortization Of Settlements Related Deferred Premium On Derivatives Amortization Of Settlements Related Deferred Premium On Derivatives Entity Emerging Growth Company Entity Emerging Growth Company 2029 Long-Term Debt, Maturity, Year Three Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unfunded Loan Commitment Unfunded Loan Commitment [Member] Origination costs Debt Issuance Costs, Net Net losses (gains) on derivatives Net gains (losses) on hedging instruments Net gains (losses) on derivative instruments Derivative, Gain (Loss) on Derivative, Net Derivatives related to funds withheld under reinsurance treaties Derivatives Related To Funds Withheld Under Reinsurance Treaties [Member] Derivatives Related To Funds Withheld Under Reinsurance Treaties Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Payout Annuities Payout Annuity Payout Annuity [Member] Payout Annuity Common stock, outstanding (in shares) Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Common Stock, Shares, Outstanding Unrealized losses Debt Securities, Unrealized Loss Percentage Debt Securities, Unrealized Loss Percentage Insurance [Abstract] Schedule of Debt Securities - Amortized Cost, Gross Unrealized Gains and Losses, Fair Value and Allowance for Credit Loss and Maturities Marketable Securities [Table Text Block] Liabilities Reinsurance Liabilities [Abstract] Expected future benefit payments, undiscounted Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Increase in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 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] Allowance for Credit Loss Debt Securities, Maturity, Allocated and Single Maturity Date, Allowance For Credit Loss [Abstract] Debt Securities, Maturity, Allocated and Single Maturity Date, Allowance For Credit Loss Derivative Instruments and Hedging Activities Disclosure [Abstract] Other Product Lines Other Product Lines [Member] Other Product Lines Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Reinsurance recoverable on market risk benefits GMIB Reinsurance Recoverable GMIB Reinsurance Recoverable Income tax expense (benefit) Income tax expense (benefit) Income tax expense (benefit) Income Tax Expense (Benefit) Schedule of Impaired Financing Receivables Financing Receivables, Impaired [Table Text Block] Financing Receivables, Impaired Purchases of: Payments to Acquire Investments [Abstract] Other assets Other assets Other Assets Equity interest in entity acquired (in shares) Equity Interest In Entity Acquired, Number Of Shares Equity Interest In Entity Acquired, Number Of Shares Fair Value Fair Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Interest credited on other contract holder funds, net of deferrals and amortization Interest credited Policyholder Account Balance, Interest Expense Document Information [Line Items] Document Information [Line Items] 80% - 100% Debt-to-Value Ratio, 80 to 100 Percent [Member] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Limited partnerships Investments In Limited Partnerships Investments In Limited Partnerships Separate Account Asset Category [Axis] Separate Account Asset Category [Axis] Single corporate obligor Single Corporate Obligor [Member] Single Corporate Obligor Total investment income excluding funds withheld assets Investments, Excluding Funds Withheld Assets [Member] Investments, Excluding Funds Withheld Assets Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Deferred Acquisition Costs Deferred Policy Acquisition Costs [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Derivative claim Derivative Claim Derivative Claim Class of Treasury Stock [Table] Class of Treasury Stock [Table] Commitments and Contingencies Disclosure [Abstract] FHLBI capital stock FHLBI capital stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Beginning balance at original discount rate Ending balance at original discount rate Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance Not rated securities External Credit Rating, Not Rated [Member] External Credit Rating, Not Rated Interest credited Policyholder Account Balance, Interest Expense, Gross Of Reinsurance Policyholder Account Balance, Interest Expense, Gross Of Reinsurance Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Internal Internal Pricing Source [Member] Internal Pricing Source Debt instrument, term Debt Instrument, Term 12 months or longer, fair value Debt Securities, Continuous Unrealized Loss Position, 12 Months Or Longer Debt Securities, Continuous Unrealized Loss Position, 12 Months Or Longer Proceeds from sales of available-for-sale debt securities Proceeds from Sale of Debt Securities, Available-for-Sale Debt Securities, available-for-sale, net of allowance for credit losses of $17 and $11 at March 31, 2026 and December 31, 2025, respectively (amortized cost: 2026 $52,356; 2025 $50,491) Debt Securities, Available-for-Sale, Excluding Accrued Interest Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Funds withheld embedded derivative Funds Withheld Embedded Derivative [Member] Funds Withheld Embedded Derivative Separate Account Asset Category [Domain] Separate Account Asset Category [Domain] Equity Components [Axis] Equity Components [Axis] Year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Schedule of Market Risk Benefit, Activity Market Risk Benefit, Activity [Table Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Operating Benefits and Expenses Operating Costs and Expenses [Abstract] Change in non-performance risk on market risk benefits, net of tax expense (benefit) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Debt Service Coverage Ratios [Axis] Debt Service Coverage Ratios [Axis] Debt Service Coverage Ratios Corporate securities Interest Income, Securities, US Treasury and Other US Government Net amount at risk Policyholder Account Balance, Net Amount at Risk Number of reportable segments Number of Reportable Segments Schedule of Portion of Gains (Losses) Included in Net Income or Other Comprehensive Income Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Assets And Liabilities, Gain (Loss) Included In Earnings And Other Comprehensive Income (Loss) [Table Text Block] Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Assets And Liabilities, Gain (Loss) Included In Earnings And Other Comprehensive Income (Loss) Schedule of Roll forward of the Separate Account Balance Separate Account, Liability [Table Text Block] Funds withheld payable under reinsurance treaties Funds Withheld, Payable Under Reinsurance Treaties Funds Withheld, Payable Under Reinsurance Treaties Issuance of treasury stock Stock Issued During Period, Value, Treasury Stock Reissued Entity Address, State or Province Entity Address, State or Province Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] % of Total Financing Receivable, before Allowance for Credit Loss, to Total, Percent Dividends on common stock Dividends, Common Stock Effects of Reinsurance [Line Items] Effects of Reinsurance [Line Items] Debt Securities, Available-for-sale, Allowance for Credit Loss [Table] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table] Mortgage loans Loans Receivable, Fair Value Disclosure Bond forwards Bond Forwards [Member] Bond Forwards Interest credited on other contract holder funds, gross Interest Credited to Policy Owner Account Individual: Individual [Axis] Market risk benefit, liabilities, measurement input Market Risk Benefit, Liability, Measurement Input Market Risk Benefit, Liability, Measurement Input Without single maturity Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, Without Single Maturity Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, Without Single Maturity Separate account assets Separate account assets Separate Account Asset Dividends on common stock Payments of Ordinary Dividends, Common Stock Financing receivables, collateralized by properties, number of states Financing Receivable, Collateralized By Properties, Number Of States Financing Receivable, Collateralized By Properties, Number Of States Deposits Policyholder Account Balance, Issuance Unconsolidated VIEs, exposure to loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Schedule of Components of Amounts Included in Purchases, Sales, Issuances and Settlements Schedule Of Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Assets And Liabilities, Purchases, Sales, Issuances, And Settlements [Table Text Block] Schedule Of Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Assets And Liabilities, Purchases, Sales, Issuances, And Settlements Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Due after 5 years through 10 years Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, After Year Five Through Ten Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, After Year Five Through Ten Repayments of debt of consolidated investment entities Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current 30-89 Days Past Due Financial Asset, 30-89 Days Past Due [Member] Financial Asset, 30-89 Days Past Due Total investment income excluding funds withheld assets Gross Investment Income (Loss) Gross Investment Income (Loss) Gross Unrealized Gains Gross Unrealized Gains Debt Securities, Accumulated Gross Unrealized Gain, Before Tax Debt Securities, Accumulated Gross Unrealized Gain, Before Tax Market risk benefit liabilities Market Risk Benefit Liabilities [Member] Market Risk Benefit Liabilities Due after 20 years Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Twenty Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Twenty Fixed Annuity Fixed Annuities Fixed Annuity [Member] Sales, maturities and repayments of: Proceeds from Sale, Maturity and Collection of Investments [Abstract] Effect of changes in interest rates Market Risk Benefit, Increase (Decrease) from Interest Rate Change Commercial paper Commercial Paper Pre-tax reconciling items from adjusted operating income to net income (loss) attributable to Jackson Financial Inc.: Segment Non Operating Adjustments [Abstract] Segment Non Operating Adjustments Prime Prime [Member] Entity Central Index Key Entity Central Index Key Deferrals of acquisition costs Deferred Policy Acquisition Cost, Capitalization PEO Name PEO Name Schedule of Contractual Maturities of Long-term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Total revenues Total revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Net worth percentage, increase adjustment from equity issuances Debt Instrument, Consolidated Net Worth Percentage, Increase Adjustment From Equity Issuances Debt Instrument, Consolidated Net Worth Percentage, Increase Adjustment From Equity Issuances Schedule of Information About Credit Quality and Vintage Year of Commercial Mortgage Loans Financing Receivable Credit Quality Indicators [Table Text Block] Operating Costs and Other Expenses Operating Costs And Other Expenses [Text Block] Operating Costs And Other Expenses Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Equity index put options Equity Index Put Option [Member] Equity Index Put Option 12 months or longer, # of securities Debt Securities, Continuous Unrealized Loss Position, 12 Months Or Longer, Number Of Positions Debt Securities, Continuous Unrealized Loss Position, 12 Months Or Longer, Number Of Positions Fair Value Fair Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral Upgrade, Collateral, Right to Reclaim Cash Not Offset Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral Upgrade, Collateral, Right to Reclaim Cash Not Offset Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Office Office Building [Member] Schedule of Operating Costs and Other Expenses Schedule of Other Operating Cost and Expense, by Component [Table Text Block] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) [Abstract] Transfers from Level 2 to Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into (Out Of) Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into (Out Of) Level 3 Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Total Product and Service, Excluding Institutional And Other Product Lines [Member] Product and Service, Excluding Institutional And Other Product Lines Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] Reserves for future policy benefits and claims payable Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense Subsequent Event Type [Axis] Subsequent Event Type [Axis] Net realized investment gains (losses) on funds withheld assets Realized Investment Gains (Losses), Funds Withheld Assets Realized Investment Gains (Losses), Funds Withheld Assets Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Gross Unrealized Losses Debt Securities, Maturity, Allocated and Single Maturity Date, Gross Unrealized Losses [Abstract] Debt Securities, Maturity, Allocated and Single Maturity Date, Gross Unrealized Losses Gross Unrealized Losses Gross Unrealized Losses Debt Securities, Accumulated Gross Unrealized Loss, Before Tax Debt Securities, Accumulated Gross Unrealized Loss, Before Tax Deposits Additions to Contract Holders Funds Nonrelated Party Nonrelated Party [Member] Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Debt-to-Value [Domain] Debt-to-Value [Domain] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Uncommitted Money Market Line Credit Agreement Uncommitted Money Market Line Credit Agreement [Member] Uncommitted Money Market Line Credit Agreement Reinsurance agreement, ceding commission Reinsurance Agreement, Ceding Commission Reinsurance Agreement, Ceding Commission AAA NRSRO, AAA Rating [Member] NRSRO, AAA Rating Total benefits and expenses Benefits, Losses and Expenses Number of states in which entity operates Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Less than 1.00x Debt Service Coverage Ratio, Less Than 1.00X [Member] Debt Service Coverage Ratio, Less Than 1.00X Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Repurchase agreements Assets Sold under Agreements to Repurchase, Repurchase Liability Schedule of Policyholder Account Balance and Liability for Unpaid Claims and Claims Adjustment Expense Policyholder Account Balance And Liability For Unpaid Claims And Claims Adjustment Expense [Table Text Block] Policyholder Account Balance And Liability For Unpaid Claims And Claims Adjustment Expense Investments [Domain] Investments [Domain] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Net gains (losses) on funds withheld reinsurance treaties Net gains (losses) on funds withheld reinsurance treaties (see Note 8) Gain (Loss) On Funds Withheld, Reinsurance Treaties Gain (Loss) On Funds Withheld, Reinsurance Treaties Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivatives excluding funds withheld under reinsurance treaties and non-qualified voluntary deferred compensation plan Derivatives Excluding Funds Withheld Under Reinsurance Treaties [Member] Derivatives Excluding Funds Withheld Under Reinsurance Treaties Net investment income: Net Investment Income [Abstract] Fair Value as of Grant Date Award Grant Date Fair Value Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Total, # of securities Debt Securities, Unrealized Loss Position, Number of Positions Debt Securities, Unrealized Loss Position, Number of Positions Mortgage loans, at fair value under fair value option Fair value Mortgage loans Financing Receivable, Fair Value Option Financing Receivable, Fair Value Option Current discount rate Liability for Future Policy Benefit, Current Weighted-Average Discount Rate Separate Account, Liability [Line Items] Separate Account, Liability [Line Items] Schedule of Policyholder Account Balance, Guaranteed Minimum Crediting Rate Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table Text Block] Amortization of DAC associated with non-operating items at date of transition to LDTI DAC And DSI Impact DAC And DSI Impact Operating costs and other expenses, net of deferrals Total operating costs and other expenses Costs and Expenses Market Risk Benefit [Line Items] Market Risk Benefit [Line Items] Settlements related to derivatives and collateral on investments Payments For (Proceeds From) Derivative Instruments And Collateral On Investments Payments For (Proceeds From) Derivative Instruments And Collateral On Investments Document Quarterly Report Document Quarterly Report Schedule of Quantitative Information on Significant Internally-Priced Level 3 Assets and Liabilities Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Accrued investment income Accrued Investment Income Receivable Investment Type [Axis] Investment Type [Axis] Total, gross unrealized losses Debt Securities, Unrealized Loss Position, Accumulated Loss Debt Securities, Unrealized Loss Position, Accumulated Loss Total investments Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount All Annuity Accounts All Annuity Accounts [Member] All Annuity Accounts Derivative deferred premium payable Derivative Deferred Premium Contract [Member] Derivative Deferred Premium Contract Increase (decrease) in fair value of notes issued Notes Issued At Fair Value, Period Increase (Decrease) Notes Issued At Fair Value, Period Increase (Decrease) Other product lines, end of period Present Value of Future Insurance Profits, Net Changes for securities with previously recorded credit loss Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal) Derivative assets, held collateral Derivative Asset, Fair Value of Collateral Non-PEO NEO Non-PEO NEO [Member] Initial dividend rate Preferred Stock, Dividend Rate, Percentage Fee income Fee income Fee Income Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Sale of Stock [Axis] Sale of Stock [Axis] Mortgage loans, net of allowance for credit losses of $159 and $133 at March 31, 2026 and December 31, 2025, respectively Financing Receivable, Excluding Accrued Interest And Fair Value Option, After Allowance For Credit Loss Financing Receivable, Excluding Accrued Interest And Fair Value Option, After Allowance For Credit Loss Schedule of Gross and Net Information About Financial Instruments Subject to Master Netting Arrangements - Assets Offsetting Assets [Table Text Block] Amortized Cost Amortized Cost Debt Securities, Amortized Cost Debt Securities, Amortized Cost All Award Types Award Type [Domain] Embedded derivative liabilities Embedded Derivative, Fair Value of Embedded Derivative Liability Cash surrender value Separate Account, Liability, Cash Surrender Value, Amount Noncontrolling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other income Other income (loss) Other Income Net investment income on funds withheld assets Net investment income on funds withheld assets Net investment income on funds withheld assets Net Investment Income, Funds Withheld Assets Net Investment Income, Funds Withheld Assets Compensation Amount Outstanding Recovery Compensation Amount Total net gains (losses) on derivatives and investments Total net gains (losses) on derivatives and investments Gain (Loss) On Investments And Derivative Instruments, Net Gain (Loss) On Investments And Derivative Instruments, Net Derivative liabilities Derivative Financial Instruments, Liabilities [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Funds withheld assets Policy loans Funds Withheld Reinsurance Assets [Member] Funds Withheld Reinsurance Assets Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair 
Value Fair Value Estimate of Fair Value Measurement [Member] Balance adjusted for variances from expectation Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change Transfers from Level 3 to Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers In (Out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers In (Out) of Level 3 Performing Performing Financial Instruments [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Weighted average attained age (years) Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Change in non-performance risk on market risk benefits Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Revenues Operating Revenues Revenues [Abstract] 51 Basis Points-150 Basis Points Above Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 [Member] Guaranteed Insurance Contract, Type of Benefit [Axis] Guaranteed Insurance Contract, Type of Benefit [Axis] Additions for purchases of PCD debt securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Schedule of Balances of and Changes in Liability for Future Policy Benefits, and Revenue and Interest Recognized Liability for Future Policy Benefit, Activity [Table Text Block] Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Accrued investment income Increase (Decrease) in Accrued Investment Income Receivable Accumulated other comprehensive income (loss), net of tax expense (benefit) of $(287) and $(377) at March 31, 2026 and December 31, 2025, respectively Accumulated Other Comprehensive Income (Loss), Net of Tax 2027 Long-Term Debt, Maturity, Year One Financial Instruments [Domain] Financial Instruments [Domain] Change in unrealized gains (losses) on securities with no credit impairment, net of tax expense (benefit) of: $2 and $40, for the three months ended March 31, 2026 and 2025, respectively OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Variable dividend rate Preferred Stock, Dividend Rate, Variable Rate, Percentage Preferred Stock, Dividend Rate, Variable Rate, Percentage Without single maturity Debt Securities, Maturity, Without Single Maturity Date, Amortized Cost Debt Securities, Maturity, Without Single Maturity Date, Amortized Cost Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) AA NRSRO, AA Rating [Member] NRSRO, AA Rating Net Investment Income [Line Items] Net Investment Income [Line Items] Surplus notes due 2027 Surplus Notes [Member] Surplus Notes Minimum Minimum [Member] Limited partnerships Other invested assets Partnership Interest [Member] Balance adjusted for variances from expectation Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change Company Selected Measure Name Company Selected Measure Name Effect of actual policyholder behavior different from expected Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected U.S. government securities U.S. government securities US Government Debt Securities [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Derivative liabilities by counterparty Derivative Liabilities By Counterparty Derivative Liabilities By Counterparty Long-Term Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Effect of actual variances from expected experience Effect of actual variances from expected experience Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net income (loss) attributable to Jackson Financial Inc. common shareholders, Diluted Net Income (Loss) Available to Common Stockholders, Diluted Derivative disbursement obligation Derivative, Downgrade Provision Triggered, Disbursement Obligation Derivative, Downgrade Provision Triggered, Disbursement Obligation Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward] Net Fair Value, Asset (Liability) Net fair value, derivative asset (liability) Derivative Assets (Liabilities), at Fair Value, Net Weighted average shares of common stock outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Securities Collateral Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Liability for Future Policy Benefit, Activity [Line Items] Liability for Future Policy Benefit, Activity [Line Items] Closed Block Annuity Closed Block Annuity Closed Block Annuity [Member] Closed Block Annuity Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Summary of Investment Holdings [Line Items] Summary of Investment Holdings [Line Items] Surrenders, withdrawals, and benefits Separate Account, Liability, Surrender and Withdrawal Schedule of Carrying Amount and Fair Value by Hierarchy of Certain Financial Instruments Not Reported at Fair Value Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] Underlying Securities Award Underlying Securities Amount Realized gains on sale Realized gains on sale Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Effect of changes in cash flow assumptions Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change Income Taxes Income Tax Disclosure [Text Block] Interest accrual Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense Fixed index annuity embedded derivatives Fixed Index Annuity Embedded Derivative [Member] Fixed Index Annuity Embedded Derivative Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Gross Amounts Offset in the Condensed Consolidated Balance Sheets Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Asset Offset Due after 1 year through 5 years Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year One Through Five Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year One Through Five Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Net Amount Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Policy loans Policy Loans [Member] Total equity Balance beginning of period Balance end of period Noncontrolling interests Equity, Including Portion Attributable to Noncontrolling Interest Average Price Paid Per Share (in usd per share) Shares Acquired, Average Cost Per Share Deferred tax asset for credit carryover resulting in no impact to total tax expense Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Funds withheld, net of reinsurance Increase (Decrease) in Funds Held under Reinsurance Agreements Policy loans (including $3,556 and $3,537 at fair value under the fair value option at March 31, 2026 and December 31, 2025, respectively) Policy loans Loans, Gross, Insurance Policy Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Below investment grade or not rated External Credit Rating, Non Investment Grade Or Not Rated [Member] External Credit Rating, Non Investment Grade Or Not Rated Mortality Measurement Input, Mortality Rate [Member] Investment Income [Table] Investment Income [Table] Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] Statistical Measurement [Axis] Statistical Measurement [Axis] Other Liabilities Disclosure [Abstract] Effect of changes in cash flow assumptions Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change Federal home loan bank advances Federal Home Loan Bank, Advance, Branch of FHLBank, Amount Lapse Measurement Input, Lapse Rate [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Due in 1 year or less Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, Year One Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, Year One Period of notice prior to termination Security Sold under Agreement to Repurchase, Collateral Upgrade, Subject to Master Netting Arrangement, Termination Notice Security Sold under Agreement to Repurchase, Collateral Upgrade, Subject to Master Netting Arrangement, Termination Notice Debt-to-Value [Axis] Debt-to-Value [Axis] Corporate securities, collateral upgrade Interest Income, Securities, Collateral Upgrade, US Treasury and Other US Government Interest Income, Securities, Collateral Upgrade, US Treasury and Other US Government Securities loaned, cash collateral Securities Loaned, Fair Value of Collateral Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] BB NRSRO, BB Rating [Member] NRSRO, BB Rating Net income (loss) attributable to Jackson Financial Inc. common shareholders, Basic Net Income (Loss) Available to Common Stockholders, Basic Beginning of period cumulative effect of changes in non-performance risk End of period cumulative effect of changes in non-performance risk AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax Share Repurchase Program [Domain] Share Repurchase Program [Domain] Schedule of Reconciliation of Segment Pretax Adjusted Operating Earnings to Net Income Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Claims liability and other Reinsurance Recoverables, Case Basis Credit Rating, NRSRO [Axis] Credit Rating, NRSRO [Axis] Credit Rating, NRSRO Schedule of Gains and Losses, and Change in Fair Value of Derivatives Derivative Instruments, Gain (Loss) [Table Text Block] Balance, beginning of period Balance, end of period Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change Schedule of Roll forward of the Separate Account Balance in the Consolidated Balance Sheet Separate Account, Reconciliation [Table Text Block] Separate Account, Reconciliation Level 1 Fair Value, Inputs, Level 1 [Member] Pre-capitalized trust securities issuance costs Payments Of Pre-Capitalized Trust Securities Issuance Costs Payments Of Pre-Capitalized Trust Securities Issuance Costs Deposits Separate Account, Liability, Deposit Diluted (in usd per share) Earnings Per Share, Diluted Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Credit Rating, NRSRO [Domain] Credit Rating, NRSRO [Domain] Credit Rating, NRSRO [Domain] Modified loans, unfunded commitment Amortized Cost Basis Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Shares issued and sold (in shares) Sale of Stock, Number of Shares Issued in Transaction Policyholder Account Balance [Table] Policyholder Account Balance [Table] Commercial mortgage loans Commercial Loan [Member] Sub-advisor expenses Sub-advisor expenses Sub-Advisor Expenses Sub-Advisor Expenses Treasury stock (in shares) Beginning balance, Treasury Stock (in shares) Ending balance, Treasury Stock (in shares) Treasury Stock, Common, Shares Consolidation Items [Domain] Consolidation Items [Domain] Investments, Debt and Equity Securities [Abstract] On or after March 30, 2028 Redemption Period Three [Member] Redemption Period Three Unconsolidated VIEs Variable Interest Entity, Not Primary Beneficiary [Member] Jackson National Separate Account II Jackson National Separate Account II [Member] Jackson National Separate Account II Credit loss expense Debt Securities, Available-for-Sale, Allowance for Credit Loss, Not Previously Recorded FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Reinsurance recoverable, net of allowance for credit losses of $30 and $30 at March 31, 2026 and December 31, 2025, respectively Reinsurance recoverable on market risk benefits Total Reinsurance Recoverables, Including Reinsurance Premium Paid Issuances Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance Equity securities Proceeds from Sale of Equity Securities, FV-NI Expected future gross premiums, undiscounted Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance Income taxes paid (received) Income Taxes Paid, Net Non-agency RMBS Non Agency Residential Mortgage Backed Securities [Member] Non Agency Residential Mortgage Backed Securities Market risk benefits (gains) losses, net Net (gain) loss on market risk benefits Market risk benefits gains (losses), net Market Risk Benefit, Change in Fair Value, Gain (Loss) Due after 10 years through 20 years Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year Ten Through Twenty Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year Ten Through Twenty Gross Amounts Recognized Security Loaned, Subject to Master Netting Arrangement, before Offset Earnings per share—common stock Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Unfunded partnership investment commitment Unfunded Partnership Investment Commitment [Member] Unfunded Partnership Investment Commitment TPG, Inc. TPG, Inc. [Member] TPG, Inc. Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments Security Loaned, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Accruing Loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Outstanding repurchase agreement balance Net Amounts Presented in the Condensed Consolidated Balance Sheets Securities Sold under Agreements to Repurchase Net gains (losses) on derivative instruments (see Note 5) Net gains (losses) on derivative instruments Embedded derivative gain (loss) Gain (Loss) on Derivative Instruments, Net, Pretax Bond Separate Account, Bond [Member] Separate Account, Bond Intersegment eliminations Intersegment Eliminations [Member] Schedule of Total Carrying Value Debt Securities in Unrealized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Noncumulative Preferred Stock Noncumulative Preferred Stock [Member] Net Amount Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Other Commitments [Domain] Other Commitments [Domain] Issuance of treasury stock Proceeds from Sale of Treasury Stock Equity Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Increase in authorized amount Stock Repurchase Program , Increase (Decrease) In Authorized Amount Stock Repurchase Program , Increase (Decrease) In Authorized Amount Without single maturity Debt Securities, Allowance For Credit Loss, Maturity, Without Single Maturity Debt Securities, Allowance For Credit Loss, Maturity, Without Single Maturity Due after 20 years Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Twenty Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Twenty Equity index futures Equity Index Futures [Member] Equity Index Futures Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Total financial liabilities Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract] Stressed loans Financing Receivable, Stressed Loans Financing Receivable, Stressed Loans Net gains (losses) on derivatives and investments Net gains (losses) on hedging instruments and investments Net unrealized gain (loss) Gain (Loss) On Investments And Derivative Instruments Gain (Loss) On Investments And Derivative Instruments Entity Current Reporting Status Entity Current Reporting Status Derivative [Line Items] Derivative [Line Items] Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Consolidated Entities [Domain] Consolidated Entities [Domain] Unpaid principal balance Financing Receivable, Impaired, Unpaid Principal Balance Financing Receivable, Impaired, Unpaid Principal Balance Non-performance risk adjustment Measurement Input, Entity Credit Risk [Member] Financial Instrument [Axis] Financial Instrument [Axis] Securities intended/required to be sold before recovery of amortized cost basis Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sell before Recovery Benefits and Expenses Benefits, Losses and Expenses [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Due after 1 year through 5 years Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, After Year One Through Five Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, After Year One Through Five Market risk benefit, assets, measurement input Market Risk Benefit, Assets, Measurement Input Market Risk Benefit, Assets, Measurement Input Issuance of debt of consolidated investment entities Proceeds from Issuance of Long-Term Debt Interest expense Interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Collateral payable for derivative instruments Obligation to Return Securities Received as Collateral Freestanding derivative instruments Fair Value Net Amounts Presented in the Condensed Consolidated Balance Sheets Freestanding derivative instruments Derivative Liability Policy loans not held as collateral for reinsurance Loans, Gross, Insurance Policy, Not Held As Collateral Loans, Gross, Insurance Policy, Not Held As Collateral Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Due after 10 years through 20 years Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, After Year Ten Through Twenty Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, After Year Ten Through Twenty Schedule of Reserves for Future Policy Benefits and Claims Payable Balances Schedule of Liability for Future Policy Benefits, by Product Segment [Table Text Block] Effect of expected policyholder behavior Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption Due in 1 year or less Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, Year One Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, Year One Reinsurance quota share basis Reinsurance, Percentage Of Basis Reinsurance, Percentage Of Basis Schedule of Assets and Liabilities Carried at Fair Value by Hierarchy Levels Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Shares excluded from diluted EPS calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Net proceeds received Proceeds from Issuance of Preferred Stock and Preference Stock Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] 2028 Long-Term Debt, Maturity, Year Two 5.170% Senior Notes due 2027 Senior Notes Due 2027 [Member] Senior Notes Due 2027 Other Other Property [Member] Change in unrealized gains (losses) on securities with credit impairment, net of tax expense (benefit) of: nil and nil, for the three months ended March 31, 2026 and 2025, respectively OCI, Debt Securities, Available-for-Sale, Impaired, Unrealized Holding Gain (Loss), After Adjustment And Tax OCI, Debt Securities, Available-for-Sale, Impaired, Unrealized Holding Gain (Loss), After Adjustment And Tax Pretax income (loss) attributable to Jackson Financial Inc. Income (Loss) Attributable to Parent, before Tax Other Commitments [Table] Other Commitments [Table] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Investment grade Investment grade securities External Credit Rating, Investment Grade [Member] SRZ Swiss Reinsurance Company Ltd [Member] Swiss Reinsurance Company Ltd Measure: Measure [Axis] Credit loss expense on mortgage loans Financing Receivable, Credit Loss, Expense (Reversal) Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Cash surrender value Policyholder Account Balance, Cash Surrender Value Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Securities Collateral Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral Upgrade, Collateral, Right to Reclaim Security Not Offset Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral Upgrade, Collateral, Right to Reclaim Security Not Offset Share repurchase remaining Share Repurchase Program, Remaining Authorized, Amount Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Schedule of Amounts Reclassified Out of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Investment expenses Other investment expenses on funds withheld assets Investment Income, Investment Expense Entity Tax Identification Number Entity Tax Identification Number Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Greater than 1.20x Debt Service Coverage Ratio, Greater Than 1.20X [Member] Debt Service Coverage Ratio, Greater Than 1.20X Schedule of Asset and Liability Information for Consolidated VIEs Schedule of Variable Interest Entities [Table Text Block] Derivative Derivative [Member] Common stock, issued (in shares) Common Stock, Shares, Issued 2030 Long-Term Debt, Maturity, Year Four 1.00x - 1.20x Debt Service Coverage Ratio, 1.00X To 1.20X [Member] Debt Service Coverage Ratio, 1.00X To 1.20X Commercial mortgage-backed Commercial mortgage-backed Commercial Mortgage-Backed Securities [Member] Less: Reinsurance recoverable Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance Agreement-Backed Commercial Paper Program Agreement-Backed Commercial Paper Program [Member] Agreement-Backed Commercial Paper Program Reductions for securities disposed Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sold Trading Arrangement: Trading Arrangement [Axis] B and below NRSRO, B And Below Rating [Member] NRSRO, B And Below Rating Total Shareholder Return Amount Total Shareholder Return Amount Repurchase agreements Offsetting Securities Sold under Agreements to Repurchase [Abstract] Total Realized/Unrealized Gains (Losses) Included in Net Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Corporate and Other Corporate and Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Schedule of Reconciliation of Segment Operating Revenues to Total Revenues Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Mortgage loans Payments to Acquire Finance Receivables Reinsurance recoverable, allowance for credit losses Reinsurance Recoverable, Allowance for Credit Loss Separate Accounts Disclosure [Abstract] Effect of actual variances from expected experience Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience Investment performance / change in value of equity option Policyholder Account Balance, Increase (Decrease) from Other Change Retail Retail Site [Member] Annuity reserves Liability For Future Policy Benefits, Annuity Reserves Liability For Future Policy Benefits, Annuity Reserves Funding agreements Funding Agreement Funding Agreement Due after 1 year through 5 years Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year One Through Year Five Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year One Through Year Five Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Dividends on preferred stock Dividends, Preferred Stock Shares repurchased under repurchase program (in shares) Stock Repurchased During Period, Shares Asset Class [Domain] Asset Class [Domain] Beginning of period cumulative effect of changes in discount rate assumptions End of period cumulative effect of changes in discount rate assumptions AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax Total Realized/Unrealized Gains (Losses) Included in Net Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Statement [Line Items] Statement [Line Items] Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Securities Collateral Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Percent of Total Debt Securities Carrying Value Debt Securities, Percentage Debt Securities, Percentage Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Real estate, foreclosed properties Real Estate, Foreclosed Properties [Member] Real Estate, Foreclosed Properties Subsequent Event [Line Items] Subsequent Event [Line Items] Closed Block Life Closed Block Life Closed Block Life [Member] Closed Block Life Net gains (losses) on non-derivative investments Nonoperating Gains (Losses), Non-Derivative Instruments Nonoperating Gains (Losses), Non-Derivative Instruments Securities loaned, minimum percent of fair value required as collateral Securities Loaned, Minimum Fair Value Collateral Percent Securities Loaned, Minimum Fair Value Collateral Percent Common Stock Common Stock Issued Common Stock [Member] Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Repurchase agreements and securities lending payable Securities Sold Under Agreements To Repurchase And Securities Loaned Securities Sold Under Agreements To Repurchase And Securities Loaned Depositary Shares Depositary Shares [Member] Depositary Shares Dilutive common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Investment management arrangement, term Investment Management Arrangement, Term Investment Management Arrangement, Term Balance, beginning of period Balance, end of period Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change Unrealized losses Unrealized Gain (Loss) on Investments A NRSRO, A Rating [Member] NRSRO, A Rating Asset-based commission expenses Asset-based commission expenses Asset-Based Commission Expense Asset-Based Commission Expense Statistical Measurement [Domain] Statistical Measurement [Domain] Interest Income on Non-accrual Loans Financing Receivable, Nonaccrual, Interest Income Benefits payments Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment Amortized Cost Debt Securities, Maturity, Allocated And Single Maturity Date, Amortized Cost [Abstract] Debt Securities, Maturity, Allocated And Single Maturity Date, Amortized Cost Effect of changes in assumptions Market Risk Benefit, Increase (Decrease) from Changes In Assumptions Market Risk Benefit, Increase (Decrease) from Changes In Assumptions FABN funding agreements FABN Funding Agreements [Member] FABN Funding Agreements Real Estate [Domain] Real Estate [Domain] Greater Than 150 Basis Points Above Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater [Member] Asset Class [Axis] 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[Domain] Fair Value Debt Securities, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Debt Securities, Maturity, Allocated and Single Maturity Date, Fair Value Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Gross Amounts Offset in the Condensed Consolidated Balance Sheets Security Loaned, Subject to Master Netting Arrangement, Asset Offset Due after 5 years through 10 years Debt Securities, Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year Five Through Ten Debt Securities, Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year Five Through Ten Charitable Contribution Carryforward Charitable Contribution Carryforward [Member] Charitable Contribution Carryforward Assets Derivative Asset [Abstract] Net unrealized gain (loss) AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Account values with crediting rates Policyholder Account Balance Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Mortality, expense and surrender charges Mortality Expense And Surrender Charges Mortality Expense And Surrender Charges Senior Notes Senior Notes [Member] Gross Amounts Offset in the Condensed Consolidated Balance Sheets Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Series A non-cumulative preferred stock and additional paid in capital, $1.00 par value per share: 24,000 shares authorized; 22,000 shares issued and outstanding at March 31, 2026 and December 31, 2025; liquidation preference $25,000 per share (see Note 19) Preferred Stock, Value, Issued 0.00%-1.50% Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0000 To 0150 [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0000 To 0150 Due after 1 year through 5 years Debt Securities, Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year One Through Five Debt Securities, Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year One Through Five Year two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Due after 20 years Debt Securities, Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year Twenty Debt Securities, Allowance For Credit Loss, Maturity, Allocated And Single Maturity Date, After Year Twenty Greater than 2.50% Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater Than 0250 [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater Than 0250 Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Amortization Deferred Policy Acquisition Costs, Amortization Expense Common stock; 1,000,000,000 shares authorized, $0.01 par value per share and 70,270,752 and 66,825,632 shares issued and outstanding at March 31, 2026 and December 31, 2025, respectively (see Note 19) Common Stock, Value, Issued Premiums Premiums Premiums Earned, Net Funds withheld payable under reinsurance treaties, fair value under fair value option Funds Held Under Reinsurance Agreements, Fair Value Option Funds Held Under Reinsurance Agreements, Fair Value Option Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Commitments, Contingencies, and Guarantees (see Note 16) Commitments and Contingencies Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Non-Controlling Interests Noncontrolling Interest [Member] Collateral upgrade transactions Securities Sold under Agreements to Repurchase, Collateral Upgrade [Member] Securities Sold under Agreements to Repurchase, Collateral Upgrade Schedule of Sources of Net Investment Income Schedule of Sources of Income Related to Funds Withheld Under Reinsurance Treaties Investment Income [Table Text Block] Mortgage loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount New Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Policyholders' account balances: Net Change Contract Holders Funds [Abstract] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Without single maturity Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, Without Single Maturity Date Debt Securities, Fair Value, Maturity, Allocated And Single Maturity Date, Without Single Maturity Date Derivative assets Freestanding derivative instruments, net Derivative Financial Instruments, Assets [Member] Federal Home Loan Bank Advances Federal Home Loan Bank Advances, Disclosure [Text Block] Closed Life and Annuity Blocks Closed Life and Annuity Blocks Closed Life And Annuity Blocks Segment [Member] Closed Life And Annuity Blocks Segment Life Life Insurance Product Line [Member] Long-term debt Long-term debt Debt Instrument, Fair Value Disclosure Warehouse Warehouse [Member] Debt securities Payments To Acquire Debt Securities Payments To Acquire Debt Securities Investment management arrangement, automatic renewal, permissible period Investment Management Arrangement, Automatic Renewal, Permissible Period Investment Management Arrangement, Automatic Renewal, Permissible Period Unobservable Inputs Unobservable Inputs [Member] Unobservable Inputs FHLBI capital stock, stock price (in usd per share) Federal Home Loan Bank Capital Stock Share Price Federal Home Loan Bank Capital Stock Share Price Reserves for Future Policy Benefits and Claims Payable Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Net Amount Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Transfers in and/or (out of ) Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Realized losses on sale Realized losses on sale Debt Securities, Available-for-Sale, Realized Loss All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Residential Mortgage Residential Residential Real Estate [Member] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Derivative Investments, Excluding Non-Qualified Voluntary Deferred Compensation Derivative Investments, Excluding Non-Qualified Voluntary Deferred Compensation [Member] Derivative Investments, Excluding Non-Qualified Voluntary Deferred Compensation Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] Market risk benefit assets, at fair value Market risk benefit assets Market risk benefit - (assets) Market Risk Benefit, Asset, Amount Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Recorded investment Financing Receivable, Impaired, Recorded Investment Financing Receivable, Impaired, Recorded Investment Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Repurchase agreements Securities Sold under Agreements to Repurchase [Member] Reconciliation to Condensed Consolidated Balance Sheets Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Net Amounts Presented in the Condensed Consolidated Balance Sheets Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned Schedule of Aggregate Contractual Notional Amounts and Fair Values of Derivatives Schedule of Derivative Instruments [Table Text Block] Liability for Future Policy Benefit Activity [Table] Liability for Future Policy Benefit Activity [Table] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Accumulated other comprehensive income, tax expense (benefit) AOCI Tax, Attributable to Parent Change in unrealized gains (losses) of investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Mortgage loans Mortgage loans, at fair value under the fair value option Financing Receivable, Fair Value Option [Member] Financing Receivable, Fair Value Option Liabilities Derivative Liability [Abstract] Other items Other Segment Reconciling Items, Net Income (Loss) Other Segment Reconciling Items, Net Income (Loss) Other assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Within 90 days after the occurrence of a regulatory capital event Redemption Period Two [Member] Redemption Period Two Debt securities in an unrealized loss position, percentage Debt Securities In Unrealized Loss Position, Percentage Debt Securities In Unrealized Loss Position, Percentage Title of 12(b) Security Title of 12(b) Security Interest accretion rate Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate Provision (release) Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] Deferred Policy Acquisition Cost [Table] Deferred Policy Acquisition Cost [Table] Earnings per share Earnings Per Share [Abstract] Earnings Per Share [Abstract] Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral Upgrade, Deduction of Financial Instrument Not Offset Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral Upgrade, Deduction of Financial Instrument Not Offset Included in Net Income Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) Less than 70% Debt-To-Value Ratio, Less Than 70 Percent [Member] Debt-To-Value Ratio, Less Than 70 Percent Debt securities, at fair value under the fair value option Debt Securities, Fair Value Option [Member] Debt Securities, Fair Value Option Athene Athene Life Re Ltd [Member] Athene Life Re Ltd Corporate debt securities, financial services Corporate Debt Securities, Financial Services [Member] Corporate Debt Securities, Financial Services TPG Inc common stock acquired Stock Acquired Stock Acquired Embedded derivatives Embedded Derivative Financial Instruments [Member] Derivative instrument, deferred option premiums Derivative Instrument, Deferred Option Premiums Derivative Instrument, Deferred Option Premiums Collateral upgrade transactions Gross Amounts Recognized Security Sold under Agreement to Repurchase, Collateral Upgrade, Subject to Master Netting Arrangement, before Offset Security Sold under Agreement to Repurchase, Collateral Upgrade, Subject to Master Netting Arrangement, before Offset Net losses (gains) on funds withheld reinsurance treaties Net gains (losses) on funds withheld payable under reinsurance treaties Net Gains (Losses) On Funds Withheld Payable Under Reinsurance Treaties Net Gains (Losses) On Funds Withheld Payable Under Reinsurance Treaties Fee percentage Debt Instrument, Fee Percentage Debt Instrument, Fee Percentage Change in current discount rate - reserve for future policy benefits OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment, before Tax Balance as of beginning of year Balance as of ending of year Other Policyholder Funds, Gross Other Policyholder Funds, Gross Less: Dividends on preferred stock Less: Dividends on preferred stock Less: Preferred stock dividends Preferred Stock Dividends and Other Adjustments Net MRB balance, end of period, net of reinsurance Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change Fair value option, market risk benefit, debt securities Debts Securities, Market Risk Benefits, Fair Value Option Debts Securities, Market Risk Benefits, Fair Value Option Transfers from Level 3 to NAV Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers In (Out) of Level 3 To NAV Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers In (Out) of Level 3 To NAV Number of Shares Repurchased Treasury Stock, Shares, Acquired Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] External Credit Rating by Grouping [Axis] External Credit Rating by Grouping [Axis] Total Operating Benefits and Expenses Total operating benefits and expenses Benefits, Losses and Expenses, Operating Benefits, Losses and Expenses, Operating Award Timing Disclosures [Line Items] Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table] Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table] Gross Amounts Recognized Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset Equity Equity [Text Block] Proceeds from (payments on) repurchase agreements and securities lending Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase Greater than 100% Debt-To-Value Ratio, Greater Than 100 Percent [Member] Debt-To-Value Ratio, Greater Than 100 Percent Mortgage loans Total with ACL Aggregate contractual principal Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Effect of changes in cash flow assumptions Additional Liability, Increase (Decrease) from Cash Flow Assumption Additional Liability, Increase (Decrease) from Cash Flow Assumption Reinsurance Reinsurance [Text Block] Net income (loss) attributable to Jackson Financial Inc. Net income (loss) attributable to Jackson Financial Inc. Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Policy charges and other Policyholder Account Balance, Policy Income (Charge) Policyholder Account Balance, Policy Income (Charge) Net transfers from (to) separate accounts Transfer to (from) Policyholder Account Balance (to) from Separate Account Reserves for future policy benefits Liability for Future Policy Benefit, before Reinsurance Derivatives related to non-qualified voluntary deferred compensation plan Derivatives Related To Non-Qualified Voluntary Deferred Compensation [Member] Derivatives Related To Non-Qualified Voluntary Deferred Compensation Preferred Stock, Redemption Period [Axis] Preferred Stock, Redemption Period [Axis] Preferred Stock, Redemption Period Without single maturity Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, Without Single Maturity Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, Without Single Maturity Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Purchase of treasury stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Fractional interest Sale of Stock, Number of Shares Issued in Transaction, Fractional Value Sale of Stock, Number of Shares Issued in Transaction, Fractional Value Net premiums collected Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected Accordion feature, higher borrowing capacity option Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option Reductions from charge-offs Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Fair value option, assets carrying amount Fair Value, Option, Assets, Carrying Amount Fair Value, Option, Assets, Carrying Amount Other government securities Other government securities Other Government Debt Securities [Member] Other Government Debt Securities 2036 Senior Notes Senior Notes Due 2036 [Member] Senior Notes Due 2036 Line of Credit Line of Credit [Member] Schedule of Gross and Net Information About Financial Instruments Subject to Master Netting Arrangements - Liabilities Offsetting Liabilities [Table Text Block] RILA Registered Index Linked Annuity (RILA) [Member] Registered Index Linked Annuity (RILA) Purchases, Sales, Issuances and Settlements Total Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Share Repurchase Activities Class of Treasury Stock [Table Text Block] Net reserve and embedded derivative movements Embedded Derivative, Gain (Loss) on Embedded Derivative, Net Cross-currency swaps Cross Currency Interest Rate Contract [Member] Alt-A Alt-A [Member] Alt-A Balanced Separate Account, Balanced [Member] Separate Account, Balanced At Guaranteed Minimum Policyholder Account Balance, at Guaranteed Minimum Crediting Rate [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Cumulative effect of changes in shadow adjustments Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For The Changes In Shadow Adjustments [Member] Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For The Changes In Shadow Adjustments [Member] Due after 5 years through 10 years Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Five Through Year Ten Debt Securities, Accumulated Gross Unrealized Loss, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Five Through Year Ten Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accident and health Accident and Health Insurance Product Line [Member] Gross Amounts Recognized Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, before Offset 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] Death, other policy benefits and change in policy reserves, net of deferrals Death, other policy benefits and change in policy reserves, net of deferrals Death, Other Policy Benefits And Change In Policy Reserves, Net Of Deferrals Death, Other Policy Benefits And Change In Policy Reserves, Net Of Deferrals Effect of time Market Risk Benefit, Increase (Decrease) from Time Market Risk Benefit, Increase (Decrease) from Time Statement [Table] Statement [Table] Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) 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] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Due after 20 years Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year Twenty Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year Twenty Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Net Amount Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, Collateral Upgrade, after Offset and Deduction Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, Collateral Upgrade, after Offset and Deduction Schedule of Rollforwards of Financial Instruments for Which Significant Unobservable Inputs (Level 3) are Used - Assets Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Interest Expense Liability for Future Policy Benefit, Interest Expense Gross Amounts Recognized Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral Amendment Flag Amendment Flag Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Accrued interest receivable on debt securities Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Treasury stock, at cost; 24,217,563 and 27,662,683 shares at March 31, 2026 and December 31, 2025, respectively Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Beginning balance at original discount rate (including DPL of $110, nil and $546 in March 31, 2026, and $91, nil and $588 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) Ending balance of original discount rate (including DPL of $106, nil and $534 in March 31, 2026, and $110, nil and $546 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance Apartment Apartment Building [Member] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Mortgage loans, allowance for credit loss Beginning Balance Ending Balance ACL Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Reinsurance recoverable on market risk benefits, at fair value Reinsurance recoverable on market risk benefits at fair value, end of period Market Risk Benefit, Reinsurance Recoverable, after Allowance 3.125% Senior Notes due 2031 Senior Notes Due 2031 [Member] Senior Notes Due 2031 Change in unrealized gains (losses) on securities for which an allowance for credit losses has been recorded, tax expense (benefit) OCI, Debt Securities, Available-for-Sale, Impaired, Unrealized Holding Gain (Loss), after Adjustment, Tax OCI, Debt Securities, Available-for-Sale, Impaired, Unrealized Holding Gain (Loss), after Adjustment, Tax Weighted average shares of common stock outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Share Repurchase Program [Table] Share Repurchase Program [Table] Subsequent Events [Abstract] Segment Reporting [Abstract] Market Risk Benefit [Roll Forward] Market Risk Benefit [Roll Forward] Schedule of Residential Mortgage-Backed Securities Schedule Of Residential Mortgage Backed Securities [Table Text Block] Schedule Of Residential Mortgage Backed Securities Debt Disclosure [Abstract] Due after 5 years through 10 years Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year Five Through Ten Debt Securities, Amortized Cost, Maturity, Allocated And Single Maturity Date, After Year Five Through Ten Expected future gross premiums, discounted Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance Fair Value, Separate Account Investment [Line Items] Fair Value, Separate Account Investment [Line Items] Range of Guaranteed Minimum Crediting Rate Policyholder Account Balance, Guaranteed Minimum Credit Rating Offsetting Derivative Liabilities [Abstract] Offsetting Derivative Liabilities [Abstract] Issuances Liability for Future Policy Benefit, Expected Net Premium, Issuance Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Change in current discount rate related to reserve for future policy benefits, net of tax expense (benefit) of $16 and $(16), for the three months ended March 31, 2026 and 2025, respectively OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax (Gain) loss from updating future policy benefits cash flow assumptions, net (Gain) loss from updating future policy benefits cash flow assumptions, net (Gain) loss from updating future policy benefits cash flow assumptions, net Liability for Future Policy Benefit, Remeasurement Gain (Loss) Registered index linked annuity embedded derivatives RILA embedded derivatives Registered Index Linked Annuity (RILA) Derivative [Member] Registered Index Linked Annuity (RILA) Derivative Mortgage loans Mortgage loans Financing Receivable [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 5.670% Senior Notes due 2032 Senior Notes Due 2032 [Member] Senior Notes Due 2032 Below investment grade Below investment grade securities External Credit Rating, Noninvestment Grade [Member] Net Amount Security Loaned, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Gross Amounts Offset in the Condensed Consolidated Balance Sheets Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Subsequent Events Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Credit loss income (expense) on mortgage loans Financing Receivable, Credit Loss, Expense (Reversal) And Other (Gain) Loss Financing Receivable, Credit Loss, Expense (Reversal) And Other (Gain) Loss Coinsurance percentage Coinsurance Percentage Coinsurance Percentage Current Financial Asset, Not Past Due [Member] Accrued interest written off Debt Securities, Available-for-Sale, Accrued Interest, Allowance for Credit Loss, Writeoff Debt Securities, Available-for-Sale, Accrued Interest, Allowance for Credit Loss, Writeoff Equity securities Equity securities Equity Securities [Member] Debt securities, available for sale, allowance for credit losses Beginning Balance Ending Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Net amount at risk Market Risk Benefit, Net Amount at Risk Other product lines Other Product Lines Product and Service, Other [Member] Schedule of Commercial Mortgage Loans and Residential Mortgage Loans Schedule of Participating Mortgage Loans [Table Text Block] Total liabilities Liabilities Percent of Total Class Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Mortgage loans Proceeds from Sale and Collection of Finance Receivables Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Future policy benefits Increase Decrease In Future Policy Benefits Increase Decrease In Future Policy Benefits Equity Separate Account, Equity Security [Member] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Gross Premiums Liability for Future Policy Benefit, Gross Premium Income Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Securities Collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Fair Value, Separate Account Investment [Table] Fair Value, Separate Account Investment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Schedule of Policyholder Account Balance Policyholder Account Balance [Table Text Block] Counterparty Name [Axis] Counterparty Name [Axis] Net gains (losses) on derivatives and investments: Gain (Loss) On Derivative Instruments And Investments, Net [Abstract] Gain (Loss) On Derivative Instruments And Investments, Net Policy charges and other Separate Account, Liability, Policy Charge Included in OCI Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Market Risk Benefit [Table] Market Risk Benefit [Table] Schedule of Balances of Level 3 Assets and Liabilities Measured at Fair Value with Corresponding Pricing Sources Disclosure Of Level 3 Assets And Liabilities Measured At Fair Value With Corresponding Pricing Sources [Table Text Block] Disclosure Of Level 3 Assets And Liabilities Measured At Fair Value With Corresponding Pricing Sources Debt securities, at fair value under fair value option Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate securities Corporate securities Corporate Debt Securities [Member] Due after 10 years through 20 years Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Ten Through Year Twenty Debt Securities, Accumulated Gross Unrealized Gain, Before Tax, Maturity, Allocated And Single Maturity Date, After Year Ten Through Year Twenty Corporate debt securities, healthcare Corporate Debt Securities, Healthcare [Member] Corporate Debt Securities, Healthcare US Treasury (UST) Interest Rate [Member]