General	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	Note 1. General The accompanying unaudited Consolidated Financial Statements include the accounts of Berkshire Hathaway Inc. (“Berkshire” or “Company”) consolidated with the accounts of all subsidiaries and affiliates in which Berkshire holds a controlling financial interest as of the financial statement date. In these notes, the terms “us,” “we” or “our” refer to Berkshire and its consolidated subsidiaries. Reference is made to Berkshire’s most recently issued Annual Report on Form 10-K (“Annual Report”), which includes information necessary or useful to understanding Berkshire’s businesses and financial statement presentations. Our significant accounting policies and practices were presented as Note 1 to the Consolidated Financial Statements included in the Annual Report. Financial information in this Quarterly Report reflects all adjustments that are, in the opinion of management, necessary to a fair statement of results for the interim periods in accordance with accounting principles generally accepted in the United States (“GAAP”). For several reasons, our results for interim periods may not be indicative of results to be expected for the year. The timing and magnitude of catastrophe losses incurred by insurance subsidiaries and the estimation error inherent to the process of determining liabilities for unpaid losses of insurance subsidiaries can be more significant to results of interim periods than to results for a full year. Changes in market prices of our investments in equity securities and the related changes in unrealized gains and losses will produce significant volatility in our interim and annual earnings. In addition, gains and losses from the periodic revaluation of certain assets and liabilities denominated in foreign currencies and asset impairment charges may cause significant variations in periodic net earnings. Significant estimates are used in the preparation of our Consolidated Financial Statements, including those associated with evaluations of certain long-lived assets, goodwill and indefinite-lived intangible assets for impairment, expected credit losses on amounts owed to us and the estimation of losses assumed under insurance and reinsurance contracts. Estimates may be subject to significant adjustments in future periods due to ongoing macroeconomic and geopolitical events, as well as changes in industry or company-specific factors. Actual results may differ from the estimates used in preparing our Consolidated Financial Statements. In November 2024, the FASB issued Accounting Standards Update 2024-03, “Disaggregation of Income Statement Expenses” (“ASU 2024-03”), which requires disclosure in the notes to the financial statements of specific categories underlying certain expense captions on the income statement, as well as certain qualitative disclosures. ASU 2024-03 may be adopted prospectively or retrospectively and is effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted. We are evaluating the impacts this pronouncement will have on disclosures in our Consolidated Financial Statements.

The accompanying unaudited Consolidated Financial Statements include the accounts of Berkshire Hathaway Inc. (“Berkshire” or “Company”) consolidated with the accounts of all subsidiaries and affiliates in which Berkshire holds a controlling financial interest as of the financial statement date. In these notes, the terms “us,” “we” or “our” refer to Berkshire and its consolidated subsidiaries. Reference is made to Berkshire’s most recently issued Annual Report on Form 10-K (“Annual Report”), which includes information necessary or useful to understanding Berkshire’s businesses and financial statement presentations. Our significant accounting policies and practices were presented as Note 1 to the Consolidated Financial Statements included in the Annual Report.

Financial information in this Quarterly Report reflects all adjustments that are, in the opinion of management, necessary to a fair statement of results for the interim periods in accordance with accounting principles generally accepted in the United States (“GAAP”). For several reasons, our results for interim periods may not be indicative of results to be expected for the year. The timing and magnitude of catastrophe losses incurred by insurance subsidiaries and the estimation error inherent to the process of determining liabilities for unpaid losses of insurance subsidiaries can be more significant to results of interim periods than to results for a full year. Changes in market prices of our investments in equity securities and the related changes in unrealized gains and losses will produce significant volatility in our interim and annual earnings. In addition, gains and losses from the periodic revaluation of certain assets and liabilities denominated in foreign currencies and asset impairment charges may cause significant variations in periodic net earnings.

Significant estimates are used in the preparation of our Consolidated Financial Statements, including those associated with evaluations of certain long-lived assets, goodwill and indefinite-lived intangible assets for impairment, expected credit losses on amounts owed to us and the estimation of losses assumed under insurance and reinsurance contracts. Estimates may be subject to significant adjustments in future periods due to ongoing macroeconomic and geopolitical events, as well as changes in industry or company-specific factors. Actual results may differ from the estimates used in preparing our Consolidated Financial Statements.

In November 2024, the FASB issued Accounting Standards Update 2024-03, “Disaggregation of Income Statement Expenses” (“ASU 2024-03”), which requires disclosure in the notes to the financial statements of specific categories underlying certain expense captions on the income statement, as well as certain qualitative disclosures. ASU 2024-03 may be adopted prospectively or retrospectively and is effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted. We are evaluating the impacts this pronouncement will have on disclosures in our Consolidated Financial Statements.