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Business and Basis of Presentation (Policies) | 9 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Basis of Presentation | Basis of Presentation The unaudited interim condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP). In management’s opinion, all material adjustments necessary for a fair statement of the financial condition, results of operations and cash flows of the Company, including its consolidated variable interest entities (VIEs), are reflected in the periods presented and are of a normal, recurring nature. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. These unaudited interim condensed consolidated financial statements are as of September 30, 2025 and cover the three-month period ended September 30, 2025 (third quarter 2025), the three-month period ended September 30, 2024 (third quarter 2024), the nine-month period ended September 30, 2025 (nine months 2025) and the nine-month period ended September 30, 2024 (nine months 2024). Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but is not required for interim reporting purposes, has been condensed or omitted. The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. Certain prior year balances have been reclassified to conform to the current period’s presentation.
Consolidation | The unaudited interim condensed consolidated financial statements include the accounts of AGL, its direct and indirect subsidiaries, and its consolidated financial guaranty VIEs (FG VIEs) and consolidated investment vehicles (CIVs). See Note 8, Variable Interest Entities. Intercompany accounts and transactions between and among all consolidated entities have been eliminated. All amounts are reported in U.S. dollars, unless otherwise specified.
Recent Accounting Standards Adopted And Recent Accounting Standards Not Yet Adopted | Recent Accounting Standards Adopted In September 2025, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract. This ASU refines the scope of Accounting Standards Codification (ASC) 815 to clarify which contracts are subject to derivative accounting and provides clarification under ASC 606 for share-based payments from a customer in a revenue contract. The Company elected to early adopt this ASU as of January 1, 2025, with no effect on the Company's consolidated financial statements. Recent Accounting Standards Not Yet Adopted In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments require enhanced annual disclosures regarding the rate reconciliation and income taxes paid. This ASU is effective for fiscal years beginning after December 15, 2024. The Company will apply the amendments in this ASU prospectively to all annual periods beginning after December 15, 2024. The adoption of this ASU will affect certain of the Company’s income tax disclosures. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40). The amendments in this ASU require disclosure about specific expense categories, including employee compensation, depreciation and intangible asset amortization, in the notes to financial statements at interim and annual reporting periods. This ASU is effective in fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. Early adoption is permitted. Prospective application is required, and retrospective application is permitted. The Company is evaluating when and how it will adopt this ASU and the effect that the amendments in this ASU may have on its expense disclosures. In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software. This ASU updates the capitalization guidance for internal-use software development costs by removing all references to software development project stages and providing new guidance requiring an entity to start capitalizing when both of the following occur: (i) management has authorized and committed to funding the software project; and (ii) it is probable that the project will be completed and the software will be used to perform the function intended. This ASU is effective for fiscal years beginning after December 15, 2027, and interim periods within those fiscal years, with early adoption permitted. This ASU allows entities to adopt the new guidance prospectively, retrospectively, or with a modified transition. The Company is evaluating when and how it will adopt this ASU and the effect it may have on its consolidated financial statements.
Segment Information | The Company reports its results of operations in two segments: Insurance and Asset Management. The Company separately reports the results of its Corporate division and the effects of consolidating FG VIEs and CIVs. This presentation is consistent with the manner in which the Chief Executive Officer and President, the chief operating decision maker (CODM), reviews the business to assess performance and allocate resources. The CODM predominantly uses adjusted operating income to allocate resources for each segment in the annual budget and forecasting process and to assess the performance for each segment.
Fair Value Measurement | The Company carries a significant portion of its assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., exit or transfer price). The price represents the price available in the principal market for the asset or liability. If there is no principal market, then the price is based on a hypothetical market that maximizes the value received for an asset or minimizes the amount paid for a liability (i.e., the most advantageous market). Fair value is based on quoted market prices, where available. If listed prices or quotes are not available, fair value is based on either (i) internally developed models that primarily use, as inputs, market-based or independently sourced market parameters (including, but not limited to, yield curves, interest rates and debt prices) or (ii) discounted cash flows using a third party’s proprietary pricing models. In addition to market information, when applicable, the models also incorporate transaction details, such as the instrument’s maturity and contractual features that reduce the Company’s credit exposure (e.g., collateral rights). Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments include amounts to reflect counterparty credit quality, the Company’s creditworthiness and constraints on liquidity. As markets and products develop and the pricing transparency for certain products changes, the Company may refine its methodologies and assumptions. During nine months 2025, no changes were made to the Company’s valuation models that had (or are expected to have) a material impact on the Company’s condensed consolidated balance sheets or statements of operations and comprehensive income. The Company’s valuation methods produce fair values that may not be indicative of net realizable value or future fair values. The use of different methodologies or assumptions to determine fair value of certain financial instruments could result in a materially different estimate of fair value at the reporting date. The categorization within the fair value hierarchy is determined based on whether the inputs to valuation techniques used to measure fair value are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Company estimates of market assumptions. The fair value hierarchy prioritizes model inputs into three broad levels, with Level 1 being the highest and Level 3 the lowest. The categorization, of an asset or liability, within the hierarchy is based on the lowest level of significant input to its valuation. Level 1—Quoted prices for identical instruments in active markets. The Company generally defines an active market as a market in which trading occurs at significant volumes. Active markets generally are more liquid and have a lower bid-ask spread than an inactive market. Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and observable inputs other than quoted prices, such as interest rates or yield curves and other inputs derived from or corroborated by observable market inputs. Level 3—Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. Financial instruments are considered Level 3 when their values are (i) determined using pricing models, discounted cash flow methodologies or similar techniques and (ii) at least one significant model assumption or input is unobservable. Level 3 financial instruments include those for which the determination of fair value requires significant management judgment or estimation.

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