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Basis of Presentation | 9 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Nature of Operations and Basis of Presentation | Description of Business and Basis of Presentation Description of Business We are a premier manufacturer and supplier of bleached paperboard focused on servicing independent converters in North America. We also offer services that include custom sheeting, slitting, and cutting. During the year ended December 31, 2024, we sold our tissue (consumer products) operations. Accordingly, the results of our previously-owned tissue operations have been presented as discontinued operations in our Consolidated Statements of Operations for all periods presented. See Note 4, "Discontinued operations." Basis of Presentation The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) for interim financial information. Accordingly, they do not include all the information and footnotes required by U.S. GAAP for complete consolidated financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal and recurring nature. These consolidated financial statements and related Notes should be read in conjunction with our annual report on Form 10-K for the fiscal year ended December 31, 2024. Results of operations for interim periods are not necessarily indicative of results to be expected for an entire year. All dollar amounts are shown in millions, except per share amounts.

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- Definition The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 205 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/205/tableOfContent + Details
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