Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation As used in this Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, the terms "ACCO Brands," "ACCO," the "Company," "we," "us," and "our" refer to ACCO Brands Corporation and its consolidated subsidiaries. The management of ACCO Brands Corporation is responsible for the accuracy and internal consistency of the preparation of the condensed consolidated financial statements and notes contained in this Quarterly Report on Form 10-Q. The condensed consolidated interim financial statements have been prepared pursuant to the rules and regulations of the SEC. Although the Company believes the disclosures are adequate to make the information presented not misleading, certain information and note disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the U.S. ("GAAP") have been condensed or omitted pursuant to those rules and regulations. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. The Condensed Consolidated Balance Sheet as of June 30, 2021, the related Consolidated Statements of Income, the Consolidated Statements of Comprehensive Income (Loss), the Consolidated Statements of Stockholders' Equity for the three and six months ended June 30, 2021 and 2020 and Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2021 and 2020 are unaudited. The December 31, 2020 Condensed Consolidated Balance Sheet data was derived from audited financial statements but does not include all annual disclosures required by GAAP. The financial statements included herein were prepared by management and reflect all adjustments (consisting solely of normal recurring items unless otherwise noted) which are, in the opinion of management, necessary for the fair presentation of results of operations and cash flows for the interim periods ended June 30, 2021 and 2020, and the financial position of the Company as of June 30, 2021. Interim results may not be indicative of results for a full year. Effective December 17, 2020, we completed the acquisition of PowerA (the "PowerA Acquisition"), a leading provider of third-party video gaming console accessories primarily in North America. The results of PowerA are included in all three of the Company's operating business segments effective December 17, 2020. The preliminary purchase price was $321.8 million, plus an additional earnout of up to $55.0 million in cash, which is contingent upon PowerA achieving one- and two- year sales and profit growth objectives and has a fair value of $29.8 million as of June 30, 2021. The PowerA Acquisition and related expenses were funded by cash on hand, as well as borrowings from our revolving credit facility. See "Note 3. Acquisitions" for details on the PowerA Acquisition. On April 1, 2021, we completed the acquisition of Franken Planungs-und Organisationsmittel GmbH (“Franken”), for a purchase price of €2.4 million (US$2.8 million, based on April 1, 2021 exchange rates), net of cash acquired of $1.1 million. Franken is a provider of visual communication products, including boards, markers, planning tools, as well as creative and training products. Franken is a German company that is included in the Company’s EMEA reporting segment. The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported assets and liabilities at the date of the financial statements and the reported revenues and expenses during the reporting periods. Actual results could differ from those estimates.