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Significant Accounting Policies (Policies) | 9 Months Ended
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Sep. 30, 2023
Accounting Policies [Abstract] |
Basis of Accounting | Basis of Presentation. Effective January 1, 2023, Brunswick Corporation ("Brunswick" or "the Company") changed its management reporting and updated its reportable segments to Propulsion, Engine Parts and Accessories ("Engine P&A"), Navico Group and Boat to align with our internal operating structure. As a result of this change, the Company has recast all segment information for all prior periods presented. For further information, refer to Note 9 – Segment Data. Interim Financial Statements. Brunswick's unaudited interim condensed consolidated financial statements have been prepared pursuant to SEC rules and regulations. Therefore, certain information and disclosures normally included in financial statements and related notes prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted.
Fiscal Period Policy | The Company maintains its financial records on the basis of a fiscal year ending on December 31, with the fiscal quarters spanning approximately thirteen weeks. The first quarter ends on the Saturday closest to the end of the first thirteen-week period. The second and third quarters are thirteen weeks in duration and the fourth quarter is the remainder of the year. The third quarter of fiscal year 2023 ended on September 30, 2023 and the third quarter of fiscal year 2022 ended on October 1, 2022. IT Security Incident As previously announced on June 13, 2023, the Company experienced an IT security incident that impacted some of its systems and global facilities. The Company activated its response protocols, including pausing operations in some locations, engaging leading security experts and coordinating with relevant law enforcement agencies. Normal global business operations resumed over the course of nine days following the incident. While we were able to quickly restore our operations, the incident resulted in disruption to sales as well as non-recurring costs. We will attempt to recover a portion of the lost operating earnings from lost sales and non-recurring costs from our insurance carriers. Non-recurring costs include labor while plants were idle, IT-related costs and costs for legal, consulting and other professional services directly related to this incident. During the three and nine months ended September 30, 2023, we incurred non-recurring costs related to the IT security incident of $2.1 million and $10.2 million, respectively. A portion of the non-recurring costs are included in Cost of sales and a portion in Selling, general and administrative expense in the Condensed Consolidated Statements of Comprehensive Income. We estimate the incident resulted in lost revenue of approximately $80 million to $85 million and operating earnings of $35 million to $40 million in the nine months ended September 30, 2023. TN-BC Holdings LLC Joint Venture Impairment TN-BC Holdings LLC (the "Joint Venture") is a 50% owned joint venture, accounted for as an equity method investment, between the Company and TechNexus Holdings LLC formed in 2017. During the three months ended September 30, 2023, the Company recorded an impairment charge of $19.2 million due to a decline in the fair value of its investment in the Joint Venture, as a result of a reduction in value of certain of the Joint Venture's underlying investments. The impairment charge is included in Equity (loss) earnings in the Condensed Consolidated Statements of Comprehensive Income.

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- Definition Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References No definition available. + Details
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- Definition Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481231/810-10-45-12 + Details
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