Basis of Presentation and Accounting Policies	9 Months Ended
Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Accounting Policies	BASIS OF PRESENTATION AND ACCOUNTING POLICIES Basis of Presentation The interim consolidated financial statements include the accounts of The Travelers Companies, Inc. (together with its subsidiaries, the Company). These financial statements are prepared in conformity with U.S. generally accepted accounting principles (GAAP) and are unaudited. In the opinion of the Company’s management, all adjustments necessary for a fair presentation have been reflected. Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been omitted. All material intercompany transactions and balances have been eliminated. The accompanying interim consolidated financial statements and related notes should be read in conjunction with the Company’s consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 (the Company’s 2024 Annual Report). The preparation of the interim consolidated 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 interim consolidated financial statements and the reported amounts of revenues and claims and expenses during the reporting period. Actual results could differ from those estimates. To the extent that the Company changes its accounting for, or presentation of, items in the financial statements, the presentation of such amounts in prior periods is changed to conform to the current period presentation, if appropriate, and disclosed, if material. On May 27, 2025, the Company entered into an agreement to sell its Canadian personal insurance business and the majority of its Canadian commercial insurance business to Definity Financial Corporation for approximately US$2.4 billion. The Company will retain its surety business in Canada. The sale is subject to regulatory approvals and customary closing conditions, and is expected to close in the first quarter of 2026. Accounting Standards Not Yet Adopted In September 2025, the Financial Accounting Standards Board (FASB) issued updated guidance on the accounting for internal-use software costs. The updated guidance removes all references to software development project stages so that the guidance is neutral to different software development methods and allows for the application of iterative software development methods such as agile. The updated guidance requires that an entity capitalize software costs when both: 1) management has authorized and committed to the funding of the software project, and 2) it is probable that the project will be completed, and the software will be used to perform its intended function. Additionally, the updated guidance clarifies that internal and external training costs and maintenance costs must be expensed as incurred. The updated guidance is effective for the quarter ended March 31, 2028, and can be applied on a prospective, modified, or retrospective transition approach. Early adoption is permitted. The adoption of this guidance is not expected to have a material effect on the Company’s results of operations, financial position, or liquidity. Enactment of the One Big Beautiful Bill Act of 2025 On July 4, 2025, the U.S. enacted a budget reconciliation package known as the One Big Beautiful Bill Act of 2025 (OBBBA) which includes both tax and non-tax provisions. The changes resulting from the tax provisions in OBBBA are not expected to have a material impact on the Company’s results of operations.

The interim consolidated financial statements include the accounts of The Travelers Companies, Inc. (together with its subsidiaries, the Company). These financial statements are prepared in conformity with U.S. generally accepted accounting principles (GAAP) and are unaudited. In the opinion of the Company’s management, all adjustments necessary for a fair presentation have been reflected. Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been omitted. All material intercompany transactions and balances have been eliminated. The accompanying interim consolidated financial statements and related notes should be read in conjunction with the Company’s consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 (the Company’s 2024 Annual Report).

The preparation of the interim consolidated 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 interim consolidated financial statements and the reported amounts of revenues and claims and expenses during the reporting period. Actual results could differ from those estimates. To the extent that the Company changes its accounting for, or presentation of, items in the financial statements, the presentation of such amounts in prior periods is changed to conform to the current period presentation, if appropriate, and disclosed, if material.

On May 27, 2025, the Company entered into an agreement to sell its Canadian personal insurance business and the majority of its Canadian commercial insurance business to Definity Financial Corporation for approximately US$2.4 billion. The Company will retain its surety business in Canada. The sale is subject to regulatory approvals and customary closing conditions, and is expected to close in the first quarter of 2026.

In September 2025, the Financial Accounting Standards Board (FASB) issued updated guidance on the accounting for internal-use software costs. The updated guidance removes all references to software development project stages so that the guidance is neutral to different software development methods and allows for the application of iterative software development methods such as agile. The updated guidance requires that an entity capitalize software costs when both: 1) management has authorized and committed to the funding of the software project, and 2) it is probable that the project will be completed, and the software will be used to perform its intended function. Additionally, the updated guidance clarifies that internal and external training costs and maintenance costs must be expensed as incurred.

The updated guidance is effective for the quarter ended March 31, 2028, and can be applied on a prospective, modified, or retrospective transition approach. Early adoption is permitted. The adoption of this guidance is not expected to have a material effect on the Company’s results of operations, financial position, or liquidity.

On July 4, 2025, the U.S. enacted a budget reconciliation package known as the One Big Beautiful Bill Act of 2025 (OBBBA) which includes both tax and non-tax provisions. The changes resulting from the tax provisions in OBBBA are not expected to have a material impact on the Company’s results of operations.