Revision of Prior Period [Axis] Revision of Prior Period [Axis] Bonds available for sale Debt Securities, Available for Sale [Member] Debt Securities, Available for Sale Other policyholder funds Other Policyholder Funds Hotel Hotel [Member] Investments Investment, Policy [Policy Text Block] Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Total net realized losses Realized gains (losses) Realized Investment Gains (Losses) Constant default rate Measurement Input, Default Rate [Member] Cash Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Credit contracts Credit Risk Contract [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Integration and transaction costs associated with acquiring or divesting businesses Business Combination And Divestiture Acquisition And Integration Related Costs Acquisition and integration related costs incurred to effect a business combination which have been expensed during the period. Reinsurance asset, allowance for credit loss Reinsurance Asset, Allowance For Credit Loss Reinsurance Asset, Allowance For Credit Loss Tabular List, Table Tabular List [Table Text Block] Change in deferred tax asset (liability) Less: Income tax expense (benefit) Other Comprehensive Income (Loss), Tax Future Application of Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Net loss reserve discount Total reserve discount Loss Reserve Discount Represents the discount of loss reserves to present value for claims that won't be paid for an extended period of time. Schedule of Fair Values of Financial Instruments not Measured at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Fair value option gain (loss) Fair Value, Option, Changes in Fair Value, Gain (Loss) Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Cash Collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk (as a percent) Percentage of mortgage loans in geographic area Concentration Risk, Percentage Notional Amount Derivative Asset, Notional Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Change in other Other Comprehensive Income Deferred Acquisition Cost And Other Adjustments Before Tax Period Increase (Decrease) Represents the amount recorded in other comprehensive income due to the adjustment in deferred acquisition costs and other adjustments. Impairments of assets Asset Impairment Charges Total AIG shareholders’ equity Equity, Attributable to Parent Deposit accounting liabilities Deposit Contracts, Liabilities Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] New York NEW YORK Common stock, shares authorized (in shares) Common Stock, Shares Authorized Investments [Table] Investments [Table] This table lists the investments. The line items identify information about the investment. Shares issued (in shares) Stock Issued During Period, Shares, New Issues Recurring Basis Fair Value, Recurring [Member] Long-short Hedge Funds, Equity Long (Short) [Member] Funds withheld investment assets Funds Held under Reinsurance Agreements, Asset Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Less: Net income (loss) attributable to noncontrolling interests Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Fair Value, Total Debt Securities, Available-for-Sale, Unrealized Loss Position Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Investment Grade Internal Investment Grade [Member] Contractual deductible recoverable amount Contractual Deductible Recoverable Amount Represents contractual deductible recoverable amounts due from policyholders. 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] Structured Structured Investment [Member] Structured Investment Aggregate fair value of available for sale securities sold Debt Securities, Available-for-Sale, Sold at Par Value Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other assets Other Assets [Member] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before income tax expense Income before income tax expense Income (loss) before income tax expense (benefit) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Net results of businesses in run-off, net investment income, reconciliation to income (loss) from continuing operations before income tax expense Income (Loss) From Businesses In Run-Off, Adjusted Pre-Tax Income (Loss) Income (Loss) From Businesses In Run-Off, Adjusted Pre-Tax Income (Loss) Insurance reserves Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Statement of Stockholders' Equity [Abstract] Reportable Segments Operating Segments [Member] Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Less: Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Non-recurring costs related to regulatory or accounting changes Other Nonrecurring Expense Number of countries in which the entity operates Number of Countries in which Entity Operates Document Fiscal Period Focus Document Fiscal Period Focus Leveraged buyout Leveraged Buyout [Member] Represents debt and/or equity investments made as a part of a transaction in which assets of mature companies are acquired from the current shareholders, typically with the use of financial leverage. Fair Value Option Fair Value Option, Disclosures [Table Text Block] Award Timing Method Award Timing Method [Text Block] Total Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Award Type Award Type [Axis] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Capitalization of deferred policy acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which Allowance for Credit Losses Was Taken AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Parent [Member] Sales or distributions of: Proceeds from Investing Activity [Abstract] Entity Address, City or Town Entity Address, City or Town Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Effect of exchange rate changes on cash and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company 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] Gains/(losses) recognized in earnings on hedging derivatives Total Derivative, Gain (Loss) on Derivative, Net Other, including foreign exchange Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss), And Other Deferred Policy Acquisition Costs, Foreign Currency Translation Gain (Loss), And Other Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Shares outstanding, beginning of year (in shares) Shares outstanding, end of period (in shares) Common Stock, Shares, Outstanding Insurance [Abstract] CLO/ABS Certain Collateralized Loan Obligations And Asset Backed Securities Securitized Loans And Receivables [Member] Certain Securities that are collateralized by a pool of assets and asset-backed securities that are repaid with cash flows derived from credit card receivables, car loans, recreational vehicle loans, mobile home loans and similar financial assets that are being securitized. Other assets Other, fair value Other Assets, Fair Value Disclosure Other bond securities Debt Securities, Fixed Maturity [Member] Debt Securities, Fixed Maturity Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Deferred tax asset, increase (decrease) in valuation allowance recognized 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] Derivative Instruments and Hedging Activities Disclosure [Abstract] Foreign exchange effect Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss) Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income tax expense Income tax benefit Income Tax Expense (Benefit) Other assets, including restricted cash of $17 in 2026 and $16 in 2025 (portion measured at fair value: 2026 - $0; 2025 - $135) Other assets Other Other Assets Fair Value Beginning of Period Fair Value End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Greater than 80% Debt-to-Value Ratio, 80 to 100 Percent [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Derivatives designated as hedging instruments Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] AIG Financial Products AIG Financial Products [Member] AIG Financial Products Losses and loss adjustment expenses incurred: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Other Acquisition Expenses Deferred Policy Acquisition Cost, Amortization Expense, Other Other Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis Liabilities, Other Increase (Decrease) Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis Liabilities, Other Increase (Decrease) Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Text Block] Other fixed maturity securities Fixed Maturity Securities, Other [Member] Other fixed maturity securities [Member] 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] Commitments and Contingencies Disclosure [Abstract] Fixed maturity securities and other invested assets transferred in connection with reinsurance transactions Noncash Or Part Noncash, Securities Transferred In Connection With Reinsurance Transaction Noncash Or Part Noncash, Securities Transferred In Connection With Reinsurance Transaction Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Changes in the fair values of equity securities, AIG's investment in Corebridge and gain/loss on sale of shares Change in fair value of equity method investment Increase (Decrease) in Equity Securities, FV-NI Available for sale securities Proceeds from Sale of Debt Securities, Available-for-Sale Bonds available for sale, at fair value, net of allowance for credit losses of $38 in 2026 and $37 in 2025 (amortized cost: 2026 - $71,936; 2025 - $71,772) Bonds available for sale Total Fixed maturity securities - available for sale Debt Securities, Available-for-Sale, Excluding Accrued Interest Total investment income Investment Income, Interest and Dividend, Income (Loss) Investment Income, Interest and Dividend, Income (Loss) Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 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 Derivative liabilities Fair Value Derivative Liability, Subject to Master Netting Arrangement, before Offset Amortized Cost, Net of Allowance Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Equity Components [Axis] Equity Components [Axis] 2023 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Less: Noncontrolling interests AOCI Attributable to Noncontrolling Interest [Member] Liability for unpaid losses and loss adjustment expenses, allowance for credit losses Liability For Unpaid Claims And Claims Adjustment Expense, Allowance For Credit Loss Liability For Unpaid Claims And Claims Adjustment Expense, Adjustments Common stock issued under stock plans Stock Issued During Period, Value, Treasury Stock Reissued Losses and loss adjustment expenses incurred Loss and Loss Adjustment Expenses Incurred Policyholder Benefits and Claims Incurred, Net Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Entity Address, State or Province Entity Address, State or Province Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Percent of Total Financing Receivable, before Allowance for Credit Loss, to Total, Percent Number of Loans Financing Receivable, Number Of Loans Indicates the number of financing receivables under each classification. Dividends on common stock Dividends, Common Stock Effects of Reinsurance [Line Items] Effects of Reinsurance [Line Items] Loans, fair value Loans Receivable, Fair Value Disclosure Individual: Individual [Axis] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Dividends on common stock Payments of Ordinary Dividends, Common Stock Exposure to loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Mortgage-backed, asset-backed and collateralized Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Per share purchase price (in dollars per share) Sale of Equity Method Investments, Price Per Share Sale of Equity Method Investments, Price Per Share Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Percentage of outstanding common stock Subsidiary, Ownership Percentage, Noncontrolling Owner Repayments of debt Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current 65% to 80% Debt-To-Value Ratio, 65 To 80 Percent [Member] Debt-To-Value Ratio, 65 To 80 Percent Foreign currency translation gain (loss) adjustment related to net investment hedge relationships Derivatives used in Net Investment Hedge, Increase (Decrease), Gross of Tax Change in foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] All other derivatives and hedge accounting Gain (Loss) on Sale of Derivatives NICO NICO [Member] National Indemnity Company, a subsidiary of Berkshire Hathaway. Ownership [Domain] Ownership [Domain] Fortitude Re funds withheld embedded derivative Modified Coinsurance And Funds Withheld Embedded Derivatives [Member] Modified Coinsurance And Funds Withheld Embedded Derivatives [Member] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Entity Central Index Key Entity Central Index Key Capitalization Deferred Policy Acquisition Cost, Capitalization PEO Name PEO Name 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 Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Schedule of Credit Quality Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Total losses and loss adjustment expenses incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Other changes: Liability For Unpaid Claims And Claims Adjustment Expense Other Incurred Claims [Abstract] Liability For Unpaid Claims And Claims Adjustment Expense Other Incurred Claims [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Offices Office Building [Member] Credit Risk Related Contingent Features Credit Risk Related Contingent Features [Member] Credit Risk Related Contingent Features [Member] Net Premiums Written Premiums Written, Net Total carrying values of cash and securities deposited under requirements of regulatory authorities or other insurance-related arrangements Assets Held by Insurance Regulators Exercise Price Award Exercise Price Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which Allowance for Credit Losses Was Taken AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Noncontrolling Interest [Member] Entity Filer Category Entity Filer Category Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] U.S. federal income tax at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event Type [Axis] Subsequent Event Type [Axis] Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Other bond securities Bonds [Member] Debt-to-Value [Domain] Debt-to-Value [Domain] Less: Reclassification adjustments included in net income Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 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] Total benefits, losses and expenses Benefits, Losses and Expenses Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Income (Loss) Total AOCI Attributable to Parent [Member] Risk Transferred - U.S. Commercial long-tail exposures for accident years 2015 and prior (as a percent) Reinsurance Transfer Of Reserve Risk Percentage Reinsurance Transfer Of Reserve Risk Percentage Consideration paid, including interest Reinsurance Recoverables, Aggregate Consideration Aggregate consideration paid for reinsurance ceded. Investments [Domain] Investments [Domain] Reinsurance recoverable Reinsurance recoverable Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Ownership [Axis] Ownership [Axis] Derivatives and Hedge Accounting Derivative Instruments and Hedging Activities Disclosure [Text Block] Other invested assets Proceeds from Sale and Maturity of Other Investments Rollforward of Common Stock Outstanding Schedule of Stock by Class [Table Text Block] Net investment income: Net Investment Income [Abstract] Retirement Plan Liabilities Adjustment Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Other Liabilities Other Liabilities [Member] Fair Value as of Grant Date Award Grant Date Fair Value Percent of net present value of scheduled interest payments required to be collateralized by Corebridge Debt instrument, Collateral, Percent Of Net Present Value Of Scheduled Interest Payments Debt instrument, Collateral, Percent Of Net Present Value Of Scheduled Interest Payments Weighted average loan-to-value ratio (as a percent) Weighted Average Loan To Value Ratio Weighted Average Loan To Value Ratio Real Estate and Investment Entities Real Estate and Investment Funds [Member] Variable interest entities consisting of real estate and investment funds. 2022 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Levels 1, 2 and 3 Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Total adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Addition to (release of) allowance for expected credit losses and disputes, net Reinsurance Recoverable, Credit Loss Expense (Reversal) Document Quarterly Report Document Quarterly Report Fair Value, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 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 Schedule of Net Asset Value Per Share Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block] Investment Type [Axis] Investment Type [Axis] Total investments Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Proceeds from (payments for) Payments for (Proceeds from) Financing Activities [Abstract] Payments for (Proceeds from) Financing Activities [Abstract] Addition to (release of) the allowance for credit losses on securities that had an allowance recorded in a previous period, for which there was no intent to sell before recovery of amortized cost basis Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal) Derivative asset, Fair value of collateral Derivative Asset, Fair Value of Collateral Reinsurance assets, net of allowance for credit losses and disputes Reinsurance Assets Net Of Allowance Represents reinsurance assets, including amounts due from reinsurers for claims and unearned reinsurance premiums, net of an allowance for loss. Premiums and other receivables, net of allowance for credit losses and disputes of $135 in 2026 and $131 in 2025 Premiums and Other Receivables, Net Non-PEO NEO Non-PEO NEO [Member] Net change in short-term investments Payments for (Proceeds from) Short-Term Investments Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Notional Amount Derivative Liability, Notional Amount Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax All Award Types Award Type [Domain] Bifurcated embedded derivative liabilities, fair value Embedded Derivative, Fair Value of Embedded Derivative Liability Non-redeemable noncontrolling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Non-U.S. governments Non-US Governments [Member] Non-US Governments Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other income Other Income Compensation Amount Outstanding Recovery Compensation Amount Rollforward of Activity in Loss Reserves Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Percent of principal required to be collateralized by Corebridge Debt Instrument, Collateral, Percent Of Principal Debt Instrument, Collateral, Percent Of Principal Foreign exchange contracts Foreign Exchange Contract [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimated Fair Value Estimate of Fair Value Measurement [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 Fair Value, Option, Quantitative Disclosures [Line Items] Denominator for EPS: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Non-operating pension expenses Pension Expense One Time Payment Pension Expense One Time Payment Revenues: Revenues [Abstract] Number of individual securities in continuous unrealized loss position for longer than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Non-operating litigation reserves and settlements Nonoperating Litigation Reserves And Settlements, Pre-Tax Income (Loss) Nonoperating Litigation Reserves And Settlements, Pre-Tax Income (Loss) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Financial Instruments [Domain] Financial Instruments [Domain] Other Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis Assets Other Increase (Decrease) Fair Value Measurement With Unobservable Inputs Reconciliation, Recurring Basis Assets Other Increase (Decrease) Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other Comprehensive (Income) Loss Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Current and deferred income taxes - net Increase (Decrease) In Current and Deferred Income Taxes The net cash inflow (outflow) during the reporting period related to the current and deferred income taxes. Retroactive reinsurance Retroactive Reinsurance Discount, Amount Retroactive Reinsurance Discount, Amount Net Investment Income [Line Items] Net Investment Income [Line Items] Minimum Minimum [Member] Commissions and premium taxes payable Accrued Commissions And Accrued Premium Taxes Accrued Commissions And Accrued Premium Taxes Composition of Mortgages and other loans receivable Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Total other comprehensive income (loss), before of income tax expense (benefit) Other Comprehensive Income (Loss), before Tax Stockholders' Equity Note [Abstract] Diluted (in shares) Weighted average common shares outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Information Segment Reporting, Policy [Policy Text Block] Average original expected lives (in years) Fair Value, Investments Entities That Calculate Net Asset Value Per Share Liquidating Investment Average Original Expected Lives Average original expected period the underlying assets are expected to be liquidated by the investees for investments for which net asset value per share is calculated. 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] Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Commercial loans, other loans and notes receivable Commercial, Other And Notes Portfolio Segment [Member] Commercial, Other And Notes Portfolio Segment Reinsurance percentage Equity Method Investments, Reinsurance Percentage Equity Method Investments, Reinsurance Percentage Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Premiums and other receivables and payables - net Increase (Decrease) In Premiums And Insurance Balances Receivable And Payable, Net Represents (a) changes in the carrying amount, net of allowance for doubtful accounts, of all premiums and other types of receivables due from other persons or entities and (b) changes in the carrying amount of the following combination (1) the known and estimated amounts owed to insurers under reinsurance treaties or other arrangements and (2) any reserves for outstanding life insurance and accident and health claims, net of applicable reinsurance. Unrealized change arising during period Other Comprehensive Income (Loss), before Reclassifications, before Tax Gross Realized Gains Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Income Taxes Income Tax Disclosure [Text Block] Contractual obligation Contractual Obligation United Kingdom UNITED KINGDOM Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Aggregate fair value of net liability position Derivative, Net Liability Position, Aggregate Fair Value Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs, Policy [Policy Text Block] Total equity Balance, beginning of period Balance, end of period Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Corebridge retained investment Equity Method Investments, Fair Value Disclosure Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Common Share (EPS) Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Net Realized Gains (Losses) On Fortitude Re funds Withheld Assets Net Realized Gains (Losses) On Fortitude Re funds Withheld Assets [Member] Net Realized Gains (Losses) On Fortitude Re funds Withheld Assets Ceded Credit Risk, Reinsurer [Domain] Reinsurer, Name [Domain] Investment Income [Table] Investment Income [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Prior-service credit Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] Write-offs charged against the allowance for credit losses and disputes Reinsurance, Loss on Uncollectible Accounts in Period, Amount 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 Schedule of Other Comprehensive Income (Loss) Reclassification Adjustments Schedule Of Other Comprehensive Income Loss Reclassification Adjustments [Table Text Block] Schedule Of Other Comprehensive Income Loss Reclassification Adjustments Debt-to-Value [Axis] Debt-to-Value [Axis] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts AOCI, Market Risk Benefit, Change In Discount Rates, Noncontrolling Interest [Member] AOCI, Market Risk Benefit, Change In Discount Rates, Noncontrolling Interest Net income attributable to AIG common shareholders Net Income (Loss) Available to Common Stockholders, Basic Other liabilities Other Liabilities, Fair Value Disclosure Level 1 Fair Value, Inputs, Level 1 [Member] Fortitude Re funds withheld assets Modified Coinsurance And Funds Withheld Assets [Member] Modified Coinsurance And Funds Withheld Assets [Member] Diluted (in dollars per share) Earnings Per Share, Diluted Private Equity Funds and Hedge Funds Private Equity Funds And Hedge Funds [Member] Private Equity Funds And Hedge Funds Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Fortitude Re Funds Withheld Assets Fortitude [Member] Fortitude [Member] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Reinsurance Reinsurance Accounting Policy [Policy Text Block] Treasury stock, shares of common stock (in shares) Treasury stock, beginning of year (in shares) Treasury stock, end of period (in shares) Treasury Stock, Common, Shares Consolidation Items [Domain] Consolidation Items [Domain] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Investments, Debt and Equity Securities [Abstract] Unconsolidated VIE Variable Interest Entity, Not Primary Beneficiary [Member] Ceded Credit Risk, Reinsurer [Axis] Reinsurer, Name [Axis] Convex Group Limited Convex Group Limited [Member] Convex Group Limited Yield Measurement Input, Yield [Member] Measurement Input Yield [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] Other Stockholders' Equity, Other Components of net realized capital gains (losses) Gain (Loss) on Securities [Line Items] Taxes Income Taxes Paid, Net Current accident year Increase (Decrease) In Loss Reserve Discount, Current Year Represents the increase (decrease) in discount of loss reserves attributable to current accident year loss reserve activities. Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Total other changes Liability For Unpaid Claims and Claims Adjustment Expense Other Net Represents the total liability as of the balance sheet date for amounts representing the estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. Total mortgage and other loans receivable Total Total Loans, carrying value Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Schedule of Fair Value and Gross Unrealized Loss on Available for Sale Securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Other Commitments [Domain] Other Commitments [Domain] Schedule of Net Realized and Unrealized Gains and Losses Included in Income, Level 3 Assets Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date Equity Securities, FV-NI, Unrealized Gain (Loss) Non-U.S. governments Non-U.S. governments Debt Security, Government, Non-US [Member] Retained investment in Corebridge Other investments Other Investments [Member] Investments Investments [Member] Restructuring and other costs Restructuring Charges Geographic Concentration Risk Geographic Concentration Risk [Member] Net losses on sales of securities available for sale and other assets Gain (Loss) On Sale Of Debt Securities, Available For Sale And Other Assets, Net Net gains and losses on sales of securities available for sale and other assets. Event-driven Hedge Funds, Event Driven [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Prior years, discount charge (benefit) Prior Year Claims And Claims Adjustment Expense, Discount Represents the amount of discount accreted to the prior years' liability for unpaid claims and claims adjustment expense. Percentage of total, allowance for credit losses Financing Receivable, Allowance for Credit Loss to Outstanding, Percent Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Derivative [Line Items] Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Consolidated Entities [Domain] Consolidated Entities [Domain] Current and deferred income tax liabilities Income Taxes Payable, Current And Deferred Income Tax Liabilities, Net Income Taxes Payable, Current And Deferred Income Tax Liabilities, Net Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Financial Instrument [Axis] Financial Instrument [Axis] Noncash revenues, expenses, gains and losses included in income (loss): Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Benefits, losses and expenses: Benefits, Losses and Expenses [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Gross Unrealized Losses, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Hedge funds Hedge Funds [Member] Other securities Payment for Acquisition, Trading Security, Held-for-Investment Interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Gross Unrealized Losses, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Composition of Mortgages and Other Loans Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Federal Home Loan Bank stock Federal Home Loan Bank Stock Net realized gains (losses): Realized Investment Gains (Losses) [Abstract] Derivative liabilities Total derivative liabilities on consolidated balance sheet Derivative Liability Change in net actuarial loss Other Comprehensive (Income) Loss, Defined Benefit Plan Net Actuarial Gain (Loss), After Reclassification Adjustment, Before Tax Other Comprehensive (Income) Loss, Defined Benefit Plan Net Actuarial Gain (Loss), After Reclassification Adjustment, Before Tax Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Interest rate contracts Interest Rate Contract [Member] Deposit accounting assets, net of allowance for credit losses of $49 in 2026 and $49 in 2025 Deposit Contracts, Assets Gross Unrealized Losses, Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Liabilities: 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] Other Commitments [Table] Other Commitments [Table] Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Fortitude Re funds withheld payable Funds Held Under Reinsurance Agreements, Liability [Member] Funds Held Under Reinsurance Agreements, Liability Non- Structured Non Structured Investment [Member] Non Structured Investment Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Workers compensation tabular discount amount Workers Compensation Discount, Amount, Tabular Current year monetary amount of the change in worker's compensation tabular reserve liability resulting from the discount applied to reduce the reserve to present value. Unfavorable (favorable) prior year loss reserve development Prior years, excluding discount and amortization of deferred gain Prior Year Claims And Claims Adjustment Expense Excluding Discount And Deferred Gain Amortization Represents the increase decrease in the liability for unpaid claims and claims adjustment expense related to the period for claims incurred in prior reporting periods and related claims settlement costs, excluding discount and amortization of deferred gain. Derivative assets, net Derivative, Fair Value, Net Reinsurance recoverable (as a percent) Reinsurance Recoverables, Gross, Percent Reinsurance Recoverables, Gross, Percent Remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Intangible assets and other Intangible Assets, Net Excluding Goodwill and Other Intangible Assets, Net Excluding Goodwill and Other National Indemnity Company National Indemnity Company [Member] National Indemnity Company Net Investment Income Investment Income [Member] Schedule of Effect of the Reclassification of Significant Items out of Accumulated Other Comprehensive Income on the Respective Line Items in the Consolidated Statements of Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Collateral held for deductible recoverable amounts Collateral Held For Subrogation Represents the amount of collateral held for subrogation. Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Investment expenses Investment Income, Investment Expense Entity Tax Identification Number Entity Tax Identification Number Aggregate proceeds Proceeds from Sale of Equity Method Investments Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Mortgage-backed, asset-backed and collateralized Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Gross Unrealized Losses Debt Securities, Gross Unrealized Losses [Abstract] Debt Securities, Gross Unrealized Losses Common stock, shares issued (in shares) Shares issued, beginning of year (in shares) Shares issued, end of period (in shares) Common Stock, Shares, Issued Change in allowance for credit losses on fixed maturity securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other reserves Liability for Future Policy Benefit, Other Liability for Future Policy Benefit, Other CMBS Commercial Mortgage-Backed Securities [Member] Derivatives Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Change in unrealized appreciation (depreciation) of fixed maturity securities on which allowance for credit losses was taken OCI, Debt Securities, Available-For-Sale, With Allowance For Credit Loss, Unrealized Holding Gain (Loss), After Adjustment, after Tax Change in unrealized appreciation (depreciation) of fixed maturity securities on which allowance for credit losses were taken. Securities sold during the period Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sold U.S. workers' compensation Workers Compensation Discount, Value Amount Workers Compensation Discount, Value Amount Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Net Realized and Unrealized (Gains) Losses Included in Income Net realized gains (losses), liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Other Operations Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Balance, beginning of year Balance, end of year Reinsurance Recoverable, Allowance for Credit Loss Workers compensation non tabular discount amount Workers Compensation Discount, Amount, Nontabular Current year monetary amount of the change in worker's compensation non tabular reserve liability resulting from the discount applied to reduce the reserve to present value. Mortgage-backed, asset-backed and collateralized Collateralized Mortgage-Backed Securities [Member] Lending Activities Financing Receivables [Text Block] Proceeds from (payments for) Payments for (Proceeds from) Investing Activities [Abstract] Payments for (Proceeds from) Investing Activities [Abstract] Venture capital Venture Capital Funds [Member] Asset Class [Domain] Asset Class [Domain] Net Realized and Unrealized Gains (Losses) Included in Income Net realized gains (losses), assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Investment Concentration Risk Investment Concentration Risk [Member] Investment Concentration Risk Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Fixed maturity securities: Debt Securities [Abstract] Common Stock Common Stock [Member] Issuances, liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Accumulated depreciation on investment in real estate Real Estate Investment Property, Accumulated Depreciation Net increase in cash and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Dilutive common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Unrealized (gains) losses in earnings - net Change in unrealized appreciation on available for sale securities Unrealized Gain (Loss) on Investments Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Bonds available for sale, amortized cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Ceded percentage Liability For Future Policy Benefit, Ceded, Percent Liability For Future Policy Benefit, Ceded, Percent Other Other Hedge Funds [Member] Represents the other hedge funds category of investment which includes multi strategy and relative value strategies. Asset Class [Axis] Asset Class [Axis] Fixed maturity securities available for sale Debt Securities, Available-for-Sale, Restricted Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Other Comprehensive Income (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Unearned premiums Unearned Premiums Change in unrealized appreciation (depreciation) of all other investments OCI, Debt Securities, Available-For-Sale, Without Allowance For Credit Loss, Unrealized Holding Gain (Loss), After Adjustment, after Tax Gross appreciation or the gross loss in value of the total of unsold fixed maturity investments other than investments which had been determined to have had an other than temporary credit impairment in fair value below its amortized cost basis at the end of an accounting period due to credit impairment, net of reclassification adjustments and taxes. Net loss reserve discount benefit (charge) Net reserve discount benefit (charge) Increase (Decrease) In Loss Reserve Discount Represents the increase (decrease) in discount of loss reserves. Operating Activities [Axis] Operating Activities [Axis] Pledged Status [Axis] Pledged Status [Axis] Discount and spread, ceiling (as a percent) Workers Compensation Discount And Spread, Percent, Ceiling Workers Compensation Discount And Spread, Percent, Ceiling Growth equity Growth Equity [Member] Investments in equity securities of mature companies that are aiming for growth. Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Carrying value of reverse repurchase agreements Securities for Reverse Repurchase Agreements Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in dollars per share) Earnings Per Share, Basic Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward] Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward] Actuarial losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Change in discount rates Other​ Comprehensive ​Income​, Change In Discount Rates Used To Measure Traditional And Limited Payment Long-Duration Insurance Contracts, Before Tax Other​ Comprehensive ​Income​, Change In Discount Rates Used To Measure Traditional And Limited Payment Long-Duration Insurance Contracts, Before Tax Collateral obtained from third parties for derivative transactions Additional Collateral, Aggregate Fair Value Tabular discount rate (as a percent) Workers Compensation Discount, Percent, Tabular For tabular calculations of the workers compensation reserve, the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value. Other comprehensive income (loss) Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Purchases, Sales, Issuances and Settlements, Net Purchases, Sales, Issuances and Settlements, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Net change in total reserve discount Increase (Decrease) In Loss Reserve Discount, Including Reinsurance Represents the net change in discount of loss reserves. Maximum exposure to loss, Off-Balance Sheet Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Asset Measurement Input Type [Domain] Measurement Input Type [Domain] Summary of Assets Supporting Funds Withheld Arrangements Summary Of Assets Supporting Funds Withheld Arrangements [Table Text Block] Summary Of Assets Supporting Funds Withheld Arrangements Schedule of Amortized Cost and Fair Value of Available For Sale Securities Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Underwriting Income (Loss) Underwriting Income (Loss) Ceded reserves Liability for Future Policy Benefits, Losses, Claims and Loss Expense Reserves Ceded Liability for Future Policy Benefits, Losses, Claims and Loss Expense Reserves Ceded Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Consolidated VIE Variable Interest Entity, Primary Beneficiary [Member] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Liabilities: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Liabilities [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Liabilities Consideration for equity method ownership Payments to Acquire Equity Method Investments Derivative instruments gain (loss): Derivative Instruments, Gain (Loss) [Line Items] Long-Duration Insurance Long-Duration Insurance, Other [Member] Rollforward of the Changes in Allowance for Credit Losses on Available for Sale Fixed Maturity Securities Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table Text Block] Hedging Designation [Domain] Hedging Designation [Domain] Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] Total liabilities and equity Liabilities and Equity Prior years, amortization of deferred gain on retroactive reinsurance Prior Year Claims And Claims Adjustment Expense Deferred Gain Amortization On Retroactive Reinsurance Represents the increase decrease in the liability for unpaid claims and claims adjustment expense related to the amortization of deferred gain on retroactive reinsurance. Fair Value Beginning of Year Fair Value End of Period Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, (Asset) Liability Value Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, (Asset) Liability Value Retirement Plan Liabilities Adjustment Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Balance, beginning of year Balance, end of year Deferred Policy Acquisition Cost Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Cash and restricted cash at beginning of year Cash and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Reclassification of significant items out of Accumulated Other Comprehensive Income Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] North America Commercial North America Operating Segment [Member] Consists of legal entity General Insurance businesses in the United States, Canada and Bermuda. Summary of the Impact of Funds Withheld Arrangements Summary Of The Impact Of Funds Withheld Arrangements [Table Text Block] Summary Of The Impact Of Funds Withheld Arrangements Credit Derivative [Table] Credit Derivative [Table] Accounting Policies [Abstract] Nontabular discount rate (as a percent) Workers Compensation Discount, Percent, Nontabular For non tabular calculations of the workers compensation reserve, the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value. Concentration Risk Type [Domain] Concentration Risk Type [Domain] Total Operating Segments and Corporate Non Segment [Member] Represents the sum of total operating segments and consolidation and elmination. Other invested assets Payments to Acquire Other Investments Treasury Stock Treasury Stock, Common [Member] 2026 Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Other securities Proceeds from Sale, Debt Security, Trading, and Equity Security, FV-NI, Held-for-Investment Pay vs Performance Disclosure [Line Items] Effects of Reinsurance [Table] Effects of Reinsurance [Table] Liabilities: Liabilities [Abstract] Deferred policy acquisition costs Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net Transfers into Level 3 at end of reporting period, net gains (losses) not included in realized and unrealized gains and losses related to Level 3 for the period Fair Value, Level 3 Transfers In At End Of Period, Net Gain (Loss) Excluded From Level 3 Gains (Losses) Net gains or losses for the period (realized and unrealized) related to assets and liabilities transferred into Level 3 at fair value at the end of the reporting period and are therefore not reflected in realized and unrealized gains and losses related to Level 3 for the period. Deposit accounting assets, allowance for credit loss Deposit Contracts Assets, Allowance For Credit Loss Deposit Contracts Assets, Allowance For Credit Loss Assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Gains/(losses) recognized in earnings for hedged items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Variable Interest Entity [Table] Variable Interest Entity [Table] 2024 Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Change in net unrealized gains (losses), net of tax Debt Securities Available For Sale, Unrealized Gain Loss, Net Of Tax Debt Securities Available For Sale, Unrealized Gain Loss, Net Of Tax Cash Cash Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Comprehensive income attributable to AIG Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Issuances, assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Schedule of Liabilities Measured on a Recurring Basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Maturities of fixed maturity securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Class of Stock [Line Items] Class of Stock [Line Items] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments [Table Text Block] Other Investment Companies Other Investment Companies [Member] Revision of Prior Period, Adjustment Revision of Prior Period, Adjustment [Member] Long-term debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Total assets Maximum exposure to loss, On-Balance Sheet Assets Estimated Fair Value Portion at Other than Fair Value Measurement [Member] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Credit Derivatives Contract Type [Axis] Credit Derivatives Contract Type [Axis] Geographical [Domain] Geographical [Domain] Shares sold (in shares) Sale of Equity Method Investments, Shares Sold Sale of Equity Method Investments, Shares Sold Net results of businesses in run-off Income (Loss) From Businesses In Run-Off, Net Investment Income Income (Loss) From Businesses In Run-Off, Net Investment Income Income Taxes Income Tax, Policy [Policy Text Block] Changes in the allowance for losses on Mortgage and other loans receivable Financing Receivable, Allowance for Credit Loss [Roll Forward] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Supplementary Disclosure of Condensed Consolidated Cash Flow Information Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Other Other Investment Charges Represents other investment charges not specified in the taxonomy. Concentration Risk Type [Axis] Concentration Risk Type [Axis] Mezzanine Mezzanine Tranches [Member] The mezzanine portion of the credit default swap portfolio written for financial institutions in Europe for the purpose of providing regulatory capital relief. Private equity funds Private Equity Funds [Member] Cash Equivalents, Restricted Cash and Restricted Cash Equivalents: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation [Abstract] Assets: Assets, Fair Value Disclosure [Abstract] Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Transfers out Level 3 at end of reporting period, net gains (losses) included in realized and unrealized gains and losses related to Level 3 for the period Fair Value, Level 3 Transfers Out At End Of Period, Net Gain (Loss) Included In Level 3 Gains (Losses) Net gains or losses for the period (realized and unrealized) related to assets and liabilities transferred out of Level 3 at fair value at the end of the reporting period and are therefore reflected in realized and unrealized gains and losses related to Level 3 for the period. Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Dividends declared, common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Other invested assets (portion measured at fair value: 2026 - $3,305; 2025 - $5,011) Other investments Total Other Investments Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Level 2 Fair Value, Inputs, Level 2 [Member] Premiums and other receivables, allowance for credit losses and disputes Allowance for Doubtful Accounts, Premiums and Other Receivables Equity method investments Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Net (gain) loss on divestitures and other Net (gain) loss on divestitures and other Net gain (loss) on divestitures and other Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Related Party Related Party [Member] Asset Pledged as Collateral Asset Pledged as Collateral [Member] Excluding Fortitude Re funds withheld assets Excluding Fortitude Re Funds Withheld Assets Investments Excluding Modified Coinsurance And Funds Withheld Assets [Member] Investments Excluding Modified Coinsurance And Funds Withheld Assets [Member] Fortitude RE Fortitude RE [Member] Fortitude RE [Member] PEO PEO [Member] Gross Transfers In Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Other bond securities, at fair value Other bond securities Fixed maturity securities - fair value option Debt Securities, Trading Non-cash investing activities: Noncash Investing and Financing Items [Abstract] Ceded to NICO percent of paid losses (as a percent) Reinsurance Percent Ceded on Paid Losses Percent Reinsurance Percent Ceded on Paid Losses Percent Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Reinsurance recoverables Reinsurance Recoverables, Gross Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Retained Earnings Retained Earnings [Member] Total losses and loss adjustment expenses paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Total cash and restricted cash shown in the Condensed Consolidated Statements of Cash Flows Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative assets Derivative Asset Fair Value, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Total Investments, Fair Value Disclosure Product and Service [Domain] Product and Service [Domain] Gross Transfers Out Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Total net investment income Net Investment Income Net investment income Net Investment Income Total AIG Share- holders' Equity Parent [Member] Net income Net income Net income attributable to AIG or noncontrolling interests Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total Liabilities, Fair Value Disclosure Organization, Consolidation and Presentation of Financial Statements [Abstract] Fair value of securities pledges under reverse repurchase agreements Securities Received as Collateral Extension period (in years) Fair Value, Investments Entities That Calculate Net Asset Value Per Share Liquidating Investment Average Original Expected Lives, Extension Increment Fair Value, Investments Entities That Calculate Net Asset Value Per Share Liquidating Investment Average Original Expected Lives, Extension Increment City Area Code City Area Code Rollforward of the Changes in the Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Issuances and Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Ceded to NICO net paid losses in excess, aggregate limit Reinsurance Amount Threshold Ceded On Paid Losses Aggregate Reinsurance Amount Threshold Ceded On Paid Losses Aggregate Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Amortization of deferred gain on retroactive reinsurance Amortization Of Deferred Gain On Retroactive Reinsurance Amortization Of Deferred Gain On Retroactive Reinsurance Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts AOCI, Market Risk Benefit, Change In Discount Rates, Including Portion Attributable to Noncontrolling Interest [Member] AOCI, Market Risk Benefit, Change In Discount Rates, Including Portion Attributable to Noncontrolling Interest Lending Activities, Interest Income Financing Receivable, Fee and Interest Income [Policy Text Block] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Accrued interest receivable Interest Receivable Assets: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Assets [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Assets Fair value hedging Fair Value Hedging [Member] Real assets Real Estate And Infrastructure Private Equity Funds [Member] Represents the other private equity funds category of investment, which includes investments with portfolio exposure primarily in real estate properties and infrastructure positions, including power plants and other energy generating facilities. Losses and loss adjustment expenses recognized within net (gain) loss on divestitures Liability for Unpaid Claims and Claims Adjustment Expense, Divestitures Liability for Unpaid Claims and Claims Adjustment Expense, Divestitures Other liabilities (portion measured at fair value: 2026 - $181; 2025 - $162) Other Liabilities Goodwill Goodwill Equity securities, at fair value Equity securities Equity Securities, FV-NI Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Net realized gains (losses) Net realized losses on Fortitude Re funds withheld assets Gain (Loss) on Investments Global Personal Global Personal Travel Insurance Segment [Member] Global Personal Travel Insurance Segment Gross Transfers Out Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Retail Retail [Member] Corebridge Financial Inc Corebridge Financial Inc [Member] Corebridge Financial Inc Excluding Fortitude Excluding Fortitude [Member] Excluding Fortitude [Member] Other invested assets Other Invested Assets [Member] Other investments not otherwise specified in the taxonomy. Cash paid during the period for: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount U.S. government and government sponsored entities US Treasury and Government [Member] Principal payments received on and sales of mortgage and other loans receivable Proceeds from Sale and Collection of Mortgage Notes Receivable Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Deferred Tax Asset [Domain] Deferred Tax Asset [Domain] Related Party [Domain] Related and Nonrelated Parties [Domain] Credit Concentration Risk Credit Concentration Risk [Member] Constant prepayment rate Measurement Input, Constant Prepayment Rate [Member] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] (Unfavorable) favorable prior year development and related amortization changes ceded under retroactive reinsurance agreements Prior Year Development And Change In Amortization Of Deferred Gain On Retroactive Reinsurance Represents the portion of favorable or unfavorable prior year reserve development for which we have ceded the risk under retroactive reinsurance agreements and related changes in amortization of the deferred gain. Net gains (losses) recognized during the period on equity securities and other investments Equity Securities, FV-NI, Gain (Loss) Derivative Instrument [Axis] Derivative Instrument [Axis] Restricted cash Restricted Cash Additional paid-in capital Additional Paid in Capital, Common Stock Investments: Investments [Abstract] Entity [Domain] Entity [Domain] Fair Value Debt Securities, Fair Value Losses [Abstract] Debt Securities, Fair Value Losses Net cash provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Less than 65% Debt-To-Value Ratio, Less than 65 Percent [Member] Loan to value ratio which is less than 65 percent. Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Premiums and other related payables Accrued Premiums And Other Accrued Expenses Accrued Premiums And Other Accrued Expenses Document Fiscal Year Focus Document Fiscal Year Focus Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Effective tax rates on income from continuing operations (as a percent) Effective Income Tax Rate Reconciliation, Percent Captive Insurers Captive Insurers [Member] Captive Insurers [Member] Rollforward of Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Table Text Block] Carrying Value Reported Value Measurement [Member] Valuation allowance Deferred Tax Assets, Valuation Allowance Loans on nonaccrual status Financing Receivable, Nonaccrual Derivatives and Hedge Accounting Derivatives, Policy [Policy Text Block] Segment Information Segment Reporting Disclosure [Text Block] Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Rated Not Rated [Member] Not Rated [Member] Other Commitments [Line Items] Other Commitments [Line Items] Summary of Significant Accounting Policies [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Fair value and gross unrealized losses on AIG's available for sale securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Gross Transfers In Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Weighted-average Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Amortization of intangible assets and renewal rights Amortization of Intangible Assets Loans Receivable Loans Receivable [Member] Restricted cash included in Short-term investments Restricted Cash and Cash Equivalent, Current General operating and other expenses General Operating Expense Selling, General and Administrative Expense Deferred income tax assets Deferred Income Tax Assets, Net Bonds available for sale, measurement input Debt Securities, Available-for-Sale, Measurement Input Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Onex Corporation Onex Corporation [Member] Onex Corporation Industrial Industrial Property [Member] RMBS Residential Mortgage-Backed Securities [Member] Fixed Maturities And Equity Securities Fixed Maturities And Equity Securities [Member] Fixed Maturities And Equity Securities Fortitude Re funds withheld payable (portion measured at fair value: 2026 - $(85); 2025 - $(92)) Fortitude Re funds withheld payable, portion measured at fair value Fortitude Re funds withheld payable Fortitude Re funds withheld payable Funds Held under Reinsurance Agreements, Liability Arrangement Duration Trading Arrangement Duration Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value of Fixed Maturity Securities Measured at Fair Value Based on Election of the Fair Value Option Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Segments [Axis] Segments [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other, net Payment for (Proceeds from) Other Investing Activity Shares repurchased (in shares) Stock Repurchased and Retired During Period, Shares Credit Derivatives Contract Type [Domain] Credit Derivatives Contract Type [Domain] Off-balance-sheet commitments Off-Balance-Sheet, Credit Loss, Liability Assets: Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other Commitments [Axis] Other Commitments [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] AIG shareholders’ equity: Equity, Attributable to Parent [Abstract] Others Other Financing Receivable [Member] Class of financing receivables related to other commercial financing receivables not otherwise specified. Purchase of common stock Aggregate repurchases of common stock Treasury Stock, Value, Acquired, Cost Method Net realized gains (losses), reconciliation to income (loss) from continuing operations before income tax expense Realized Other Investment Gains (Losses) Realized Other Investment Gains (Losses) Investment, Name [Axis] Investment, Name [Axis] Securities for which allowance for credit losses was not previously recorded Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded Schedule of Other Invested Assets Schedule Of Other Invested Assets [Table Text Block] Schedule Of Other Invested Assets Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] Short-duration Insurance Contracts, Accident Year [Domain] Short-Duration Insurance Contracts, Accident Year [Domain] Contingencies, Commitments and Guarantees Commitments Contingencies and Guarantees [Text Block] Derivative assets Fair Value Derivative Asset, Subject to Master Netting Arrangement, before Offset Depreciation and other amortization Depreciation, Amortization and Accretion, Net Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Change in prior service cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), After Reclassification, Before Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), After Reclassification, Before Tax Discounting of Reserves [Line Items] Discounting of Reserves [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Additional collateral postings and termination payments Credit Derivative, Additional Collateral Termination Payments Credit Derivative, Additional Collateral Termination Payments Other income (expense) - net Other Operating Income (Expense), Net, Investment Income Other Operating Income (Expense), Net, Investment Income Other State and Local Tax Jurisdiction, Other [Member] Total Assets, Fair Value Disclosure Fortitude Holdings Fortitude Holdings Fortitude Holdings [Member] Fortitude Holdings [Member] Number of securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Revision of Prior Period [Domain] Revision of Prior Period [Domain] Net Loss Reserve Discount Benefit (Charge) [Line Items] Net Loss Reserve Discount Benefit (Charge) [Line Items] Net loss reserve discount benefit (charge) [Line Items] Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts AOCI, Market Risk Benefit, Change In Discount Rates, Parent [Member] AOCI, Market Risk Benefit, Change In Discount Rates, Parent Rollforward of the Reinsurance Recoverable Allowance Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Restatement Determination Date: Restatement Determination Date [Axis] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Other, net Proceeds from (Payment for) Other Financing Activity Name Trading Arrangement, Individual Name Bifurcated embedded derivatives assets, fair value Embedded Derivative, Fair Value of Embedded Derivative Asset Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which Allowance for Credit Losses Was Taken AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Including Noncontrolling Interest [Member] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Name Awards Close in Time to MNPI Disclosures, Individual Name Accident Years 2015 and Prior Accident Years 2015 And Prior [Member] Accident Years 2015 and Prior [Member] Gains/(losses) recognized in earnings for excluded components Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net Other Other Private Equity Funds [Member] Represents the other private equity funds category of investment which includes multi strategy and mezzanine strategies. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Other commitments Other Commitment Retirement Plan Liabilities Adjustment Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member] Less: Noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Discount ceded on sale (as a percent) Percent Of Discount Ceded Percent Of Discount Ceded Fair Value Using NAV Per Share (or its equivalent) Alternative investments Alternative Investment Net Loss Reserve Discount Benefit (Charge) [Table] Net Loss Reserve Discount Benefit (Charge) [Table] Net Loss Reserve Discount Benefit (Charge) Derivative liability, Fair value of collateral Derivative Liability, Fair Value of Collateral AOCI Including Portion Attributable to Noncontrolling Interest AOCI Including Portion Attributable to Noncontrolling Interest [Member] Liability Class [Axis] Liability Class [Axis] Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets [Member] Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets Segments [Domain] Segments [Domain] Excluding modified coinsurance and funds withheld embedded derivative Excluding Modified Coinsurance And Funds Withheld Embedded Derivative [Member] Excluding Modified Coinsurance And Funds Withheld Embedded Derivative [Member] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Fixed maturity securities Available for sale fixed maturity securities, including short-term investments Fixed Maturities [Member] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other changes Reinsurance Recoverables, Allowance, Other Increase (Decrease) Amount of allowance for credit loss on reinsurance recoverables classified as other. Consolidated Entity, Excluding Consolidated VIE Consolidated Entity, Excluding Consolidated VIE [Member] Alternative investments Alternative Investments [Member] Represents the investment in hedge funds, private equity funds, affordable housing partnerships and other investment partnerships by the entity. Other invested assets Invested Assets, Other, Fair Value This element represents the portion of the balance sheet assertion valued at fair value by the entity. The fair value of investments not otherwise specified in the taxonomy. Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Gross Derivative Assets Derivative Asset [Abstract] Unrealized Appreciation (Depreciation) of All Other Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Discount and spread (as a percent) Workers Compensation Discount And Spread, Percent Workers Compensation Discount And Spread, Percent Counterparty netting Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Available for sale securities Payments to Acquire Debt Securities, Available-for-Sale Obligations of states, municipalities and political subdivisions US States and Political Subdivisions Debt Securities [Member] 2025 Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Current year Current Year Claims and Claims Adjustment Expense Amortization expense Deferred Policy Acquisition Costs, Amortization Expense Equity in income from equity method investments, net of dividends or distributions Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Premiums Net Premiums Earned Premiums Earned, Net Operating Activities [Domain] Operating Activities [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Realized Gain (Loss) on Investments Realized Gain (Loss) on Investments [Table Text Block] Contingencies, commitments and guarantees (See Note 12) Commitments and Contingencies Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] Comprehensive income Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Summary of Significant Accounting Policies [Table] Accounting Standards Update and Change in Accounting Principle [Table] Non- redeemable Non- controlling Interests Noncontrolling Interest [Member] Investments [Line Items] Investments [Line Items] Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Schedule of Net Investment Income Investment Income [Table Text Block] Hedge Funds Hedge Funds, Equity [Member] Ownership (as a percent) Equity Method Investment, Ownership Percentage Short-term investments Short-Term Investments [Member] Numerator for EPS: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Schedule of Components of Loss Reserve Discount Schedule of Components of Loss Reserve Discount [Table Text Block] Schedule of Components of Loss Reserve Discount Mortgage and other loans receivable Payments to Acquire Mortgage Notes Receivable Hedging Designation [Axis] Hedging Designation [Axis] Scenario [Axis] Scenario [Axis] Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Ceded to NICO net paid losses in excess Reinsurance Amount Threshold Ceded On Paid Losses Minimum Reinsurance Amount Threshold Ceded On Paid Losses Minimum Insurance Liabilities Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Change in retirement plan liabilities adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax California CALIFORNIA Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Gross Realized Losses Debt Securities, Available-for-Sale, Realized Loss All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Excluding AIGFP Operating Excluding AIGFP Operating [Member] Excluding AIGFP Operating Purchases of: Payment for Investing Activity [Abstract] Name Forgone Recovery, Individual Name Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] 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] Amount Reclassified from AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Net income (loss) per common share attributable to AIG common shareholders: Earnings Per Share, Attributable To Common Shareholders [Abstract] Earnings Per Share, Attributable To Common Shareholders Short-term investments, including restricted cash of $57 in 2026 and $55 in 2025 (portion measured at fair value: 2026 - $4,877; 2025 - $5,909) Short-term investments Short-term investments Other Short-Term Investments Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Total VIE Assets Variable Interest Entity, Nonconsolidated Entities, Assets Variable Interest Entity, Nonconsolidated Entities, Assets Unrealized Appreciation (Depreciation) of All Other Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest [Member] Liability for Future Policy Benefit Activity [Table] Liability for Future Policy Benefit Activity [Table] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Geographical [Axis] Geographical [Axis] Change in unrealized appreciation (depreciation) of investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Schedule of Gain (Loss) Recognized in Income on Derivative Instruments in Fair Value Hedging Relationships Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Gross Derivative Liabilities Derivative Liability [Abstract] Commercial mortgages Commercial mortgage and other loans Commercial Portfolio Segment [Member] Sales of alternative investments Gain Loss On Sale Of Alternative Investments Gain Loss On Sale Of Alternative Investments Amortization of deferred policy acquisition costs Amortization of DAC Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization Continuing Operations, Excluding Held-For-Sale Continuing Operations, Excluding Held-For-Sale [Member] Continuing Operations, Excluding Held-For-Sale Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Percentage increase in dividends per share declared Common Stock, Dividends, Per Share, Declared, Percentage Increase Common Stock, Dividends, Per Share, Declared, Percentage Increase Foreign exchange transactions Gain (Loss), Foreign Currency Transaction, before Tax Forecast Forecast [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Change in allowance for credit losses on loans Addition to (release of) allowance for loan losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Non-Investment Grade Internal Noninvestment Grade [Member] Net Income per common share attributable to AIG common shareholders: Earnings Per Share [Abstract] Losses and loss adjustment expenses paid: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] All other investments Other Investments and Securities, at Cost Net Impact Gain (Loss) on Fair Value Hedges Recognized in Earnings Embedded derivatives Embedded Derivative Financial Instruments [Member] Change in discount on loss reserves ceded under retroactive reinsurance Liability For Unpaid Claims And Claims Adjustment Expense, Retroactive Reinsurance Discount Represents the increase (decrease) in discount of loss reserves due to reinsurance transaction. Bonds available for sale and short-term investments held in escrow Restricted Investments, Current Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio [Member] Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio Shares purchased (in shares) Treasury Stock, Shares, Acquired Allowance for losses on Mortgage and other loans receivable Financing Receivable, Allowance for Credit Loss [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Scenario, Plan Scenario, Plan [Member] Award Timing Disclosures [Line Items] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Measurement Frequency [Domain] Measurement Frequency [Domain] Net Liability for unpaid loss and loss adjustment expenses, beginning of year Net liability for unpaid losses and loss adjustment expenses Liability for Unpaid Claims and Claims Adjustment Expense, Net Unfunded Commitments Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio [Member] U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio Loss severity Measurement Input, Loss Severity [Member] Net Realized Gains (Losses) Realized Investment Gains (Losses) [Member] Primary financial statement caption encompassing net realized gains and losses. Equity Equity [Text Block] Mortgage and other loans receivable, net of allowance for credit losses of $37,713 in 2026 and $37,747 in 2025 Mortgage and other loans receivable Mortgage and other loans receivable, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Net income attributable to AIG Total reclassifications for the period Net Income (Loss) Attributable to Parent Reinsurance Reinsurance [Text Block] Ceded reserves Liability for Future Policy Benefit, Ceded Liability for Future Policy Benefit, Ceded CDS Credit Default Swap [Member] Future policy benefits Liability for Future Policy Benefit, before Reinsurance Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Purchase of common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Out of Period Adjustments Reclassification, Comparability Adjustment [Policy Text Block] Write-offs charged against the allowance Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Elimination and consolidations Consolidation, Eliminations [Member] Accretion and other adjustments to prior year discount Increase (Decrease) In Loss Reserve Discount, Prior Year Represents the increase (decrease) in discount of loss reserves attributable to prior year year loss reserve development and payout pattern Purchases, Sales, Issuances and Settlements, Net Purchases, Sales, Issuances and Settlements, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) Unrealized Appreciation (Depreciation) of All Other Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest [Member] Retained earnings Retained Earnings (Accumulated Deficit) >90 days delinquent or in process of foreclosure Financial Asset, Greater Than 90 Days Past Due [Member] Financial Asset, Greater Than 90 Days Past Due 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] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Dividend income Investment Income, Dividend Fortitude RE Funds Withheld Assets Fortitude RE Funds Withheld Assets [Member] Fortitude RE Funds Withheld Assets 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] Credit derivatives: Credit Derivatives [Line Items] Statement [Table] Statement [Table] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Short-duration Insurance Contracts, Accident Year [Axis] Short-Duration Insurance Contracts, Accident Year [Axis] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] Other jurisdictions Foreign Tax Jurisdiction, Other [Member] Retroactive reinsurance adjustment (net of discount) Liability For Unpaid Claims And Claims Adjustment Expense, Retroactive Reinsurance Adjustment Net Of Discount Represents the increase decrease in the liability for unpaid claims and claims adjustment expense due to reinsurance transaction net of discount. International Commercial International Operating Segment [Member] Consists of legal entity General Insurance businesses for all other regions within General Insurance including The American International Oversees Association and all other countries including Puerto Rico. Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Assets Measured on a Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Liability for unpaid losses and loss adjustment expenses, including allowance for credit losses of $14 in 2026 and $14 in 2025 Liability for unpaid loss and loss adjustment expenses, beginning of year Total Liability for Claims and Claims Adjustment Expense Treasury stock, at cost; 2026 - 1,373,766,971 shares; 2025 - 1,368,489,324 shares of common stock Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date NICO's limit of liability under the contract Assumed Liability for Unpaid Claims and Claims Adjustment Expense Apartments Apartment Building [Member] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] 90 days or less delinquent Financial Asset, Less Than Or Equal To 90 Days Past Due [Member] Financial Asset, Less Than Or Equal To 90 Days Past Due Mortgage and other loans receivable, allowance for credit losses Allowance for credit losses Allowance for credit losses Allowance, beginning of year Allowance, end of period Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Receivable [Domain] Receivable [Domain] Basic (in shares) Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Computation of Basic and Diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Option Fair Value Option Election [Member] Fair Value Option Election [Member] Net realized gains (losses), net investment income Realized Other Investment Gains (Losses, Adjustment To Net Investment Income Realized Other Investment Gains (Losses, Adjustment To Net Investment Income Restricted cash included in Other assets Restricted Cash and Cash Equivalent, Noncurrent Segment Reporting [Abstract] Scenario [Domain] Scenario [Domain] Liability for Unpaid Losses and Loss Adjustment Expenses (Loss Reserves) Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] Net realized gains (losses) Sales of fixed maturity securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Increase (decrease) in unrealized appreciation (depreciation) of investments OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] U.S. Run-Off Long Tail Insurance Lines U.S. Long Tail Insurance Lines [Member] U.S. Long Tail Insurance lines member Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period Equity Securities, FV-NI, Realized Gain (Loss) Change in net unrealized gains (losses), gross Debt Securities, Available-for-Sale, Unrealized Gain (Loss) Interest on mortgage and other loans Financing Receivable [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Issuances and Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Counterparty netting Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Change in foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year In good standing Financial Asset, Not Past Due [Member] Equity securities Equities Equity Securities [Member] Schedule of Loss Reserve Discount Schedule Of Loss Reserve Discount [Table Text Block] Tabular disclosure of net loss reserve discount and net loss reserve discount benefit (charge). Bonds available for sale, allowance for credit losses Allowance for Credit Losses Balance, beginning of period Balance, end of period Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Total liabilities Liabilities Common stock, $2.50 par value; 5,000,000,000 shares authorized; shares issued: 2026 - 1,906,671,492 and 2025 - 1,906,671,492 Common Stock, Value, Outstanding Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Alternative equity security Other Security Investments [Member] Discounting of Reserves [Table] Discounting of Reserves [Table] Reflects the change in reserve liability resulting from the discount applied to reduce the reserve to present value. Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense: Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Consolidation Items [Axis] Consolidation Items [Axis] Counterparty Name [Axis] Counterparty Name [Axis] CLO/ABS CLO/ABS Collateralized Debt Obligations And Asset-backed Securities [Member] Securities that are collateralized by a pool of assets and asset-backed securities that are repaid with cash flows derived from credit card receivables, car loans, recreational vehicle loans, mobile home loans and similar financial assets that are being securitized. Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Reinsurance assets, net Increase (Decrease) In Reinsurance Assets, Net The net change during the reporting period in the amount of benefits the ceding insurer expects to recover on insurance policies ceded to other insurance entities as of the balance sheet date for all guaranteed benefit types and the change in funds held under reinsurance agreements or treaty (contract between the reinsurer and the ceding entity stipulating the manner in which insurance written on various risks is to be shared). Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate debt Corporate Debt Securities [Member] Collateral posted Collateral Already Posted, Aggregate Fair Value