ACCO Brands (ACCO) 10-K 21 Feb 25 2024 FY Annual report Financial data

Cover page

Cover page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Feb. 13, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-08454
Entity Registrant Name	ACCO Brands Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-2704017
Entity Address, Address Line One	Four Corporate Drive
Entity Address, City or Town	Lake Zurich
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60047
City Area Code	847
Local Phone Number	541-9500
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	ACCO
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 440.9
Entity Common Stock, Shares Outstanding		92,881,008
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s definitive proxy statement to be issued in connection with registrant’s annual stockholders' meeting expected to be held on May 20, 2025, are incorporated by reference into Part III of this report.
Entity Central Index Key	0000712034
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Auditor Information [Abstract]
Auditor Name	KPMG LLP
Auditor Location	Chicago, IL
Auditor Firm ID	185
Auditor Opinion [Text Block]	Opinions on the Consolidated Financial Statements and Internal Control Over Financial Reporting We have audited the accompanying consolidated balance sheets of ACCO Brands Corporation and subsidiaries (the Company) as of December 31, 2024 and 2023, the related consolidated statements of loss, comprehensive loss, stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2024, and the related notes and financial statement schedule II - Valuation and Qualifying Accounts and Reserves (collectively, the consolidated financial statements). We also have audited the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024 based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents		$ 74.1	$ 66.4
Accounts receivable less allowances of $16.2 and $22.9, respectively		348.9	430.7
Inventories		270.4	327.5
Other current assets		38.1	30.8
Total current assets		731.5	855.4
Total property, plant and equipment		505.5	599.6
Less: accumulated depreciation		(368)	(429.5)
Property, plant and equipment, net	[1]	137.5	170.1
Right of use asset, leases		81	91
Deferred income taxes		89.3	104.7
Goodwill		446.4	590
Identifiable intangibles, net of accumulated amortization of $460.0 and $429.5, respectively		709.6	815.7
Other non-current assets		33.1	17.9
Total assets		2,228.4	2,644.8
Current liabilities:
Notes payable		10.5	0.2
Current portion of long-term debt		40.8	36.5
Accounts payable		167.3	183.7
Accrued compensation		43.2	53.3
Accrued customer program liabilities		78.5	104
Lease liabilities		21.5	20.5
Other current liabilities		128.5	143.8
Total current liabilities		490.3	542
Long-term debt, net of debt issuance costs of $5.1 and $6.7, respectively		783.3	882.2
Long-term lease liabilities		66.9	76.8
Deferred income taxes		111.9	125.6
Pension and post-retirement benefit obligations		117.2	157.6
Other non-current liabilities		52.7	73.6
Total liabilities		1,622.3	1,857.8
Stockholders' equity:
Preferred stock, $0.01 par value, 25,000,000 shares authorized; none issued and none outstanding		0	0
Common stock, $0.01 par value, 200,000,000 shares authorized; 98,131,339 and 99,819,679 shares issued and 92,881,008 and 94,925,652 outstanding, respectively		1	1
Treasury stock, 5,250,331 and 4,894,027 shares, respectively		(47)	(45.1)
Paid-in capital		1,911.8	1,913.4
Accumulated other comprehensive loss		(572.1)	(526.3)
Accumulated deficit		(687.6)	(556)
Total stockholders' equity		606.1	787
Total liabilities and stockholders' equity		$ 2,228.4	$ 2,644.8
[1] Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowances	$ 16.2	$ 22.9
Amortizable intangible assets, accumulated amortization	460	429.5
Debt Issuance cost, unamortized	$ 5.1	$ 6.7
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	25,000,000	25,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares, issued (in shares)	98,131,339	99,819,679
Common stock, shares outstanding (in shares)	92,881,008	94,925,652
Treasury stock, shares (in shares)	5,250,331	4,894,027

Consolidated Statements of Loss

Consolidated Statements of Loss - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales		$ 1,666.2	$ 1,832.8	$ 1,947.6
Cost of products sold		1,110.8	1,234.5	1,395.3
Gross profit		555.4	598.3	552.3
Operating costs and expenses:
Selling, general and administrative expenses		365.7	393.5	376.7
Amortization of intangibles		44.7	43.4	41.5
Restructuring		16.8	27.2	9.6
Impairment of goodwill and intangible assets		165.2	89.5	98.7
Change in fair value of contingent consideration		0	0	(9)
Total operating costs and expenses		592.4	553.6	517.5
Operating (loss) income		(37)	44.7	34.8
Non-operating expense (income):
Interest expense		52.6	58.6	45.6
Interest income		(7.5)	(7.1)	(8.3)
Non-operating pension expense (income)		6.1	1.8	(4.5)
Other (income) expense, net		(0.9)	4.5	(12.9)
(Loss) income before income tax		(87.3)	(13.1)	14.9
Income tax expense		14.3	8.7	28.1
Net loss		$ (101.6)	$ (21.8)	$ (13.2)
Per share:
Basic loss per share		$ (1.06)	$ (0.23)	$ (0.14)
Diluted loss per share		$ (1.06)	$ (0.23)	$ (0.14)
Weighted average number of shares outstanding:
Basic (in shares)		95.6	95.3	95.3
Diluted (in shares)	[1]	95.6	95.3	95.3
[1] Due to the net loss during the twelve months ended December 31, 2024, 2023 and 2022 , diluted earnings per share are the same as basic earnings per share.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (101.6)	$ (21.8)	$ (13.2)
Other comprehensive (loss) income net of tax:
Unrealized gain (loss) on derivative instruments, net of tax (expense) benefit of $(1.1), $0.6 and $1.4, respectively	2.8	(1.8)	(2.9)
Foreign currency translation adjustments, net of tax (expense) benefit of $(1.1), $0.8 and $3.8, respectively	(66.1)	30.3	(37.9)
Recognition of deferred pension and other post-retirement items, net of tax (expense) benefit of $(6.0), $4.7 and $(15.5), respectively	17.5	(14.5)	36
Other comprehensive (loss) income net of tax:	(45.8)	14	(4.8)
Comprehensive loss	$ (147.4)	$ (7.8)	$ (18)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Loss (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on derivative instruments, tax benefit (expense)	$ (1.1)	$ 0.6	$ 1.4
Foreign currency translation adjustments, tax expense	(1.1)	0.8	3.8
Recognition of deferred pension and other post-retirement items, tax benefit (expense)	$ (6)	$ 4.7	$ (15.5)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net loss	$ (101.6)	$ (21.8)	$ (13.2)
Payments of contingent consideration	0	0	(9.2)
Gain on disposal of assets	(1.8)	(0.3)	(3.6)
Deferred income tax benefit	(6.9)	(20.1)	1.3
Change in fair value of contingent liability	0	0	(9)
Depreciation	28.4	32.7	37.9
Amortization of debt issuance costs	2.8	3	2.7
Amortization of intangibles	44.7	43.4	41.5
Stock-based compensation	11.9	14.8	9.5
Loss on debt extinguishment	1	0	0
Non-cash charge for impairment of goodwill and intangible assets	165.2	89.5	98.7
Changes in operating assets and liabilities:
Accounts receivable	43.3	(38.6)	31.6
Inventories	38.3	85.5	23.2
Other assets	(9)	5.9	0.4
Accounts payable	(6.3)	(68)	(66)
Accrued expenses and other liabilities	(41.5)	18.2	(57.5)
Accrued income taxes	(20.3)	(15.5)	(10.7)
Net cash provided by operating activities	148.2	128.7	77.6
Investing activities
Additions to property, plant and equipment	(15.9)	(13.8)	(16.5)
Proceeds from the disposition of assets	3.6	2.6	7.2
Net cash used by investing activities	(12.3)	(11.2)	(9.3)
Financing activities
Proceeds from long-term borrowings	207	121.9	236.7
Repayments of long-term debt	(292.5)	(199.2)	(220.5)
Borrowings (repayments) of notes payable, net	10.8	(10.2)	0.7
Payments for debt issuance costs	(2.5)	0	(1.2)
Dividends paid	(28.4)	(28.5)	(28.6)
Payments of contingent consideration	0	0	(17.8)
Repurchases of common stock	(15)	0	(19.4)
Payments related to tax withholding for stock-based compensation	(2)	(1.7)	(2.5)
Proceeds from the exercise of stock options	0	0	4.3
Net cash used by financing activities	(122.6)	(117.7)	(48.3)
Effect of foreign exchange rate changes on cash and cash equivalents	(5.6)	4.4	1
Net increase in cash and cash equivalents	7.7	4.2	21
Cash and cash equivalents
Beginning of the period	66.4	62.2	41.2
End of the period	74.1	66.4	62.2
Cash paid during the year for:
Interest	49.4	55.6	42.6
Income taxes	$ 41.6	$ 44.3	$ 37.5

Consolidated Statements of Stoc

Consolidated Statements of Stockholders’ Equity - USD ($) $ in Millions	Total	Common Stock	Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at start of period at Dec. 31, 2021	$ 864.8	$ 1	$ 1,902.2	$ (40.9)	$ (535.5)	$ (462)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(13.2)					(13.2)
Gain (loss) on derivative financial instruments, net of tax	(2.9)				(2.9)
Translation impact, net of tax	(37.9)				(37.9)
Pension and post-retirement adjustment, net of tax	36				36
Common stock repurchases	(19.4)		(19.4)
Stock-based compensation	9.5		10			(0.5)
Common stock issued, net of shares withheld for employee taxes	1.8		4.3	(2.5)
Dividends declared	(28.6)					(28.6)
Other			0.1			(0.1)
Balance at end of period at Dec. 31, 2022	$ 810.1	$ 1	1,897.2	$ (43.4)	(540.3)	(504.4)
Balance at start of period (in shares) at Dec. 31, 2021		100.1		4.3
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock issued, net of shares withheld for employee taxes (in shares)		1.5		0.3
Common stock repurchase (in shares)	(2,700,000)	(2.7)
Balance at end of period (in shares) at Dec. 31, 2022		98.9		4.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (21.8)					(21.8)
Gain (loss) on derivative financial instruments, net of tax	(1.8)				(1.8)
Translation impact, net of tax	30.3				30.3
Pension and post-retirement adjustment, net of tax	(14.5)				(14.5)
Stock-based compensation	14.8		16.3			(1.5)
Common stock issued, net of shares withheld for employee taxes	(1.7)			$ (1.7)
Dividends declared	(28.5)					(28.5)
Other	0.1		(0.1)			0.2
Balance at end of period at Dec. 31, 2023	$ 787	$ 1	1,913.4	$ (45.1)	(526.3)	(556)
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock issued, net of shares withheld for employee taxes (in shares)		0.9		0.3
Common stock repurchase (in shares)	0
Balance at end of period (in shares) at Dec. 31, 2023		99.8		4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (101.6)					(101.6)
Gain (loss) on derivative financial instruments, net of tax	2.8				2.8
Translation impact, net of tax	(66.1)				(66.1)
Pension and post-retirement adjustment, net of tax	17.5				17.5
Common stock repurchases	(15)		(15)
Stock-based compensation	11.9		13.3			(1.4)
Common stock issued, net of shares withheld for employee taxes	(2)			$ (2)
Dividends declared	(28.4)					(28.4)
Other			0.1			(0.2)
Balance at end of period at Dec. 31, 2024	$ 606.1	$ 1	$ 1,911.8	$ (47)	$ (572.1)	$ (687.6)
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock issued, net of shares withheld for employee taxes (in shares)		1.2		0.4
Common stock repurchase (in shares)	(2,900,000)	(2.9)
Balance at end of period (in shares) at Dec. 31, 2024		98.1		5.3

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Common stock, dividends per share, declared (in dollar per share)	$ 0.3	$ 0.3	$ 0.3

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ (101.6)	$ (21.8)	$ (13.2)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Rule 10b5-1 Arr Modified Flag	false
Non Rule 10b5-1 Arr Modified Flag	false

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management,

Cybersecurity Risk Management, Strategy and Governance	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	ITEM 1C. CYBERSECURITY Risk Management and Strategy The Company recognizes the importance of maintaining cybersecurity measures to safeguard our information systems and protect the confidentiality, integrity, and availability of our data. Our cybersecurity risk management is included within our overall enterprise risk management program. We have implemented a risk-based cybersecurity program to identify, assess, prioritize and manage risks from cybersecurity threats. Our efforts are designed to maintain the confidentiality, integrity and availability of our information and operational technology systems and data stored on those systems. In general, we seek to address cybersecurity risks through a risk-based, cross-functional approach that is focused on preserving the confidentiality, security and availability of our information and information systems, and to mitigate and respond effectively to cybersecurity incidents and threats. As appropriate, the Company engages external parties, including consultants, legal counsel and audit firms to enhance its cybersecurity oversight and assist with incident response. Our cybersecurity program includes: Technical Safeguards We deploy technical safeguards that are designed to protect our information systems from cybersecurity threats, including firewalls, intrusion prevention and endpoint detection and response systems, regular monitoring and access controls, which are evaluated and improved through vulnerability assessments and cybersecurity threat intelligence. Security Policy and Requirements We have an Information Security Policy that details the overall risk-based framework and governance for the management and security of our information technology assets and information. The policy applies to everyone who accesses our data or information resources, including third parties we engage. Cybersecurity Roadmap and Risk Assessment We have a cybersecurity roadmap that provides a framework for prioritizing and managing our ongoing cybersecurity program. We conduct periodic risk assessments based on the National Institute of Standards and Technology ("NIST") cybersecurity framework to identify and assess our cybersecurity risks, vulnerabilities and information security maturity assessments to evaluate the maturity stage of the overall cybersecurity program. The results of these assessments are reported to the Audit Committee of the Board, and we adjust our cybersecurity roadmap, policies, processes and practices as necessary based on the information provided by these assessments as well as the monitoring, testing and auditing noted below. Incident Response and Recovery Planning We have an established incident response and recovery plan based on the NIST cybersecurity framework. The plan specifies the process for identifying, classifying, documenting and responding to cybersecurity incidents, including escalation protocols to ensure the involvement of our executive leadership, including our CEO, CFO, CIO and General Counsel so that decisions regarding the public disclosure and reporting of any incident can be made by executive management in a timely manner. Third-Party Risk Management We use a risk-based approach to identify and oversee cybersecurity risks presented by third parties, including vendors and service providers, as well as the systems of third parties that could adversely impact our business in the event of a cybersecurity incident affecting those third-party systems. We also obtain assurances from outsourced service providers regarding the sufficiency of their security procedures and, where appropriate, assess the protections employed by these third parties. Monitoring, Testing and Auditing We monitor the evolving cybersecurity landscape that could result in new or increased cybersecurity threats. We also engage in the periodic assessment and testing of our policies, standards, processes and practices. These efforts include audits, vulnerability and penetration testing, tabletop exercises, social engineering campaigns and other internal and external assessments. We evaluate the effectiveness of our information technology-related internal controls annually. Education and Awareness The Company regularly conducts mandatory cybersecurity training for its employees, and all new hires are required to take cybersecurity training when they receive their Company computer. Failure to complete the training in a timely fashion results in their system access being suspended until completion. Management also regularly conducts "phishing" exercises to test the effectiveness of our training programs. The results of these exercises are reported to the Audit Committee. Employees also receive monthly newsletters highlighting cybersecurity developments as well as targeted email messages, as appropriate. Insurance The Company maintains cybersecurity insurance coverage in an amount that management believes to be appropriate for the Company's risk profile. Governance Audit Committee Oversight Our Audit Committee oversees the Company's cybersecurity risks. Ms. Dvorak has a certificate in Cybersecurity Oversight from the National Association of Corporate Directors and Mr. Burton is a technology expert with experience in online fraud and cybersecurity. Both Ms. Dvorak and Mr. Burton are members of our Audit Committee. Our Senior Vice President and Chief Information Officer and our Vice President, Global Cybersecurity, update the Audit Committee regularly regarding the status of ongoing cybersecurity initiatives and strategies and incident reports. They also present information to the Audit Committee regarding management's cybersecurity risk and maturity assessments, including changes to our cybersecurity roadmap as a result of these assessments. This briefing is also posted to the full Board, which also receives quarterly updates through the Audit Committee. In accordance with the Company's policies and incident response plans, based on the severity of the incident, the Audit Committee is notified and briefed. The Board and executive management participate in cybersecurity training and conduct tabletop exercises on a periodic basis. Management Oversight At a management level, our cybersecurity program is led by our Vice President, Global Cybersecurity who oversees a team with extensive knowledge and expertise. He is a Certified Information Security Professional and has over 20 years of cybersecurity experience and reports to our Chief Information Officer, who reports to our Chief Executive Officer. Our Vice President, Global Cybersecurity also chairs our Cybersecurity Management Committee which consists of senior business and functional leaders, including our Chief Information Officer and General Counsel. The Cybersecurity Management Committee is intended to provide cross-functional support for cybersecurity risk management. Cyber Risks, Threats and Incidents As a global company servicing customers in over 100 countries, we experience a variety of cybersecurity events and incidents. However, as of the date of this Annual Report on Form 10-K, we are not aware of any cybersecurity incident that has materially affected or is reasonably likely to materially affect our business, strategy, results of operations or financial condition ; though there can be no assurance that a cybersecurity incident that could have a material impact on us will not occur in the future. For further details regarding the cybersecurity risks and uncertainties we face see "Part I, Item 1A. Risk Factors -Technology and Cybersecurity Risks " of this report.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Governance Audit Committee Oversight Our Audit Committee oversees the Company's cybersecurity risks. Ms. Dvorak has a certificate in Cybersecurity Oversight from the National Association of Corporate Directors and Mr. Burton is a technology expert with experience in online fraud and cybersecurity. Both Ms. Dvorak and Mr. Burton are members of our Audit Committee. Our Senior Vice President and Chief Information Officer and our Vice President, Global Cybersecurity, update the Audit Committee regularly regarding the status of ongoing cybersecurity initiatives and strategies and incident reports. They also present information to the Audit Committee regarding management's cybersecurity risk and maturity assessments, including changes to our cybersecurity roadmap as a result of these assessments. This briefing is also posted to the full Board, which also receives quarterly updates through the Audit Committee. In accordance with the Company's policies and incident response plans, based on the severity of the incident, the Audit Committee is notified and briefed. The Board and executive management participate in cybersecurity training and conduct tabletop exercises on a periodic basis. Management Oversight At a management level, our cybersecurity program is led by our Vice President, Global Cybersecurity who oversees a team with extensive knowledge and expertise. He is a Certified Information Security Professional and has over 20 years of cybersecurity experience and reports to our Chief Information Officer, who reports to our Chief Executive Officer. Our Vice President, Global Cybersecurity also chairs our Cybersecurity Management Committee which consists of senior business and functional leaders, including our Chief Information Officer and General Counsel. The Cybersecurity Management Committee is intended to provide cross-functional support for cybersecurity risk management.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	Our Senior Vice President and Chief Information Officer and our Vice President, Global Cybersecurity, update the Audit Committee regularly regarding the status of ongoing cybersecurity initiatives and strategies and incident reports. They also present information to the Audit Committee regarding management's cybersecurity risk and maturity assessments, including changes to our cybersecurity roadmap as a result of these assessments.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	This briefing is also posted to the full Board, which also receives quarterly updates through the Audit Committee. In accordance with the Company's policies and incident response plans, based on the severity of the incident, the Audit Committee is notified and briefed. The Board and executive management participate in cybersecurity training and conduct tabletop exercises on a periodic basis.
Cybersecurity Risk Role of Management [Text Block]	Management Oversight At a management level, our cybersecurity program is led by our Vice President, Global Cybersecurity who oversees a team with extensive knowledge and expertise. He is a Certified Information Security Professional and has over 20 years of cybersecurity experience and reports to our Chief Information Officer, who reports to our Chief Executive Officer. Our Vice President, Global Cybersecurity also chairs our Cybersecurity Management Committee which consists of senior business and functional leaders, including our Chief Information Officer and General Counsel. The Cybersecurity Management Committee is intended to provide cross-functional support for cybersecurity risk management.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	Our Vice President, Global Cybersecurity also chairs our Cybersecurity Management Committee which consists of senior business and functional leaders, including our Chief Information Officer and General Counsel.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	He is a Certified Information Security Professional and has over 20 years of cybersecurity experience and reports to our Chief Information Officer, who reports to our Chief Executive Officer.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The Cybersecurity Management Committee is intended to provide cross-functional support for cybersecurity risk management.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1 . Basis of P resentation As used in this Annual Report on Form 10-K for the fiscal year ended December 31, 2024, the terms "ACCO Brands," "ACCO," the "Company," "we," "us," and "our" refer to ACCO Brands Corporation, a Delaware corporation incorporated in 2005, and its consolidated domestic and international subsidiaries. The management of ACCO Brands Corporation is responsible for the accuracy and internal consistency of the preparation of the consolidated financial statements and notes contained in this Annual Report on Form 10-K. The Company may, from time to time, reclassify certain amounts relating to its prior period disclosures to conform to its current period presentation within the notes to the consolidated financial statements. Effective January 1, 2024, the Company reorganized into two operating segments, the Americas and International. The Americas segment includes the U.S., Canada, Brazil, Mexico and Chile and the International segment includes EMEA, Australia, New Zealand and Asia. Prior period results have been reclassified to reflect this change in our operating segments. See "Note 17. Information on Operating Segments" for further details. The consolidated financial statements include the accounts of ACCO Brands Corporation and its domestic and international subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

Significant Accounting Policies

Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards	2 . Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards Nature of Business ACCO Brands has two operating segments based in different geographic regions: Americas and International. Each operating segment designs, markets, sources, manufactures and sells recognized consumer, technology and business branded products used in schools, homes and at work. Product designs are tailored to end-user preferences in each geographic region, and where possible, leverage common engineering, design and sourcing. Our product categories include gaming and computer accessories; storage and organization; notebooks; shredding; laminating and binding machines; stapling; punching; planners; dry erase boards; and do-it-yourself tools, among others. Our portfolio includes both globally and regionally recognized brands. We distribute our products through a wide variety of channels to ensure that our products are readily and conveniently available for purchase by consumers and other end-users, wherever they prefer to shop. These channels include mass retailers, e-tailers, discount, drug/grocery and variety chains, warehouse clubs, hardware and specialty stores, independent office product dealers, office superstores, wholesalers, contract stationers, and specialist technology businesses. We also sell directly through e-commerce sites and our direct sales organization. Use of Estimates Our financial statements are prepared in conformity with generally accepted accounting principles in the U.S. ("GAAP"). Preparation of our financial statements requires us to make judgments, estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses presented for each reporting period in the financial statements and the related accompanying notes. Actual results could differ significantly from those estimates. We regularly review our assumptions and estimates, which are based on historical experience and, where appropriate, current business trends. Cash and Cash Equivalents Highly liquid investments with an original maturity of three months or less are included in cash and cash equivalents. Accounts Receivable and Allowances for Sales/Pricing/Cash Discounts and Doubtful Accounts Trade receivables are recorded at the stated amount, less allowances for sales/pricing/cash discounts and doubtful accounts. The allowance for sales/pricing/cash discounts represents estimated uncollectible receivables associated with the products previously sold to customers and is recorded at the same time that the sales are recognized. The allowance is based on historical trends. The allowance for doubtful accounts represents estimated uncollectible receivables associated with potential customer defaults on contractual obligations, usually due to a customer's potential insolvency. The allowance includes amounts for certain customers where a risk of default has been specifically identified. In addition, the allowance includes a provision for customer defaults on a general formulaic basis when it is determined the risk of some default is probable and estimable but cannot yet be associated with a specific customer. The assessment of the likelihood of customer defaults is based on various factors, including the length of time the receivables are past due, historical experience and existing economic conditions. The allowances are recorded as reductions to "Net sales" and "Accounts receivable, net." Inventories Inventories are priced at the lower of cost (principally first-in, first-out) or net realizable value. When necessary, the write-down of inventory to its net realizable value is recorded for obsolete or slow-moving inventory based on assumptions about future demand and marketability of products, the impact of new product introductions and specific identification of items, such as product discontinuance or engineering/material changes. These estimates could vary significantly, either favorably or unfavorably, from actual requirements if future economic conditions, customer inventory levels or competitive conditions differ from our expectations. Property, Plant and Equipment Property, plant and equipment are carried at cost less accumulated depreciation, and depreciated principally on a straight-line basis, over the estimated useful lives of the assets. Gains or losses resulting from dispositions are included in operating income. Betterments and renewals, which improve and extend the life of an asset are capitalized; maintenance and repair costs are expensed. Purchased computer software is capitalized and amortized over the software’s useful life. The following table shows estimated useful lives of property, plant and equipment: Property, plant and equipment Useful Life Buildings 40 to 50 years Leasehold improvements Lesser of lease term or the life of the asset Machinery, equipment and furniture 3 to 10 years Computer software 5 to 10 years We capitalize interest for major capital projects. Capitalized interest is added to the cost of the underlying assets and is depreciated over the useful lives of those assets. We did no t capitalize any interest for the years ended December 31, 2024, 2023 and 2022 . Long-Lived Assets We test long-lived assets for impairment whenever events or changes in circumstances indicate that the assets’ carrying amount may not be recoverable from its undiscounted future cash flow. When such events occur, we compare the sum of the undiscounted cash flow expected to result from the use and eventual disposition of the asset or asset group to the carrying amount of a long-lived asset or asset group. The cash flows are based on our best estimate at the time of future cash flow, derived from the most recent business projections. If this comparison indicates that there is an impairment, the amount of the impairment is typically calculated using discounted expected future cash flow. The discount rate applied to these cash flows is based on our weighted average cost of capital, computed by selecting market rates at the valuation dates for debt and equity that are reflective of the risks associated with an investment in our industry as estimated by using comparable publicly traded companies. Identifiable Intangible Assets Identifiable intangible assets are comprised primarily of indefinite-lived and amortizable intangible assets acquired and arising from the application of purchase accounting. Indefinite-lived intangible assets are not amortized but are evaluated at least annually to determine whether the indefinite useful life is appropriate. Our ACCO ® trade name has been assigned an indefinite life as we currently anticipate that this trade name will contribute cash flows to ACCO Brands indefinitely. Amortizable intangible assets are amortized over their useful lives of 5 , 7 , 10 , 15 , 23 or 30 years. We test indefinite-lived intangibles for impairment annually, during the second quarter, and during any interim period when market or business events indicate there may be a potential adverse impact on a particular intangible. The test may be on a qualitative or quantitative basis as allowed by GAAP. We consider the implications of both external factors (e.g., market growth, pricing, competition, and technology) and internal factors (e.g., product costs, margins, support expenses, and capital investment) and their potential impact on cash flows in both the near and long term, as well as their impact on any identifiable intangible asset associated with the business. Based on recent business results, consideration of significant external and internal factors, and the resulting business projections, indefinite-lived intangible assets are reviewed to determine whether they are likely to remain indefinite-lived, or whether a finite life is more appropriate. In addition, based on events in the period and future expectations, management considers whether the potential for impairment exists. As of June 1, 2024, we changed our Five Star ® and Swingline ® indefinite-lived trade names to amortizable intangible assets as they no longer met the indefinite-lived criteria. We began amortizing both trade names on a straight-line basis over a life of 30 years as of June 1, 2024. Goodwill Goodwill has been recorded on our balance sheet and represents the excess of the cost of an acquisition when compared with the fair value of the net assets acquired. The authoritative guidance on goodwill and other intangible assets requires that goodwill be tested for impairment at a reporting unit level. We have determined that our reporting units are ACCO Brands Americas and ACCO Brands International. We test goodwill for impairment at least annually, during the second quarter, or any interim period when market or business events indicate there may be a potential adverse impact on goodwill. As permitted by GAAP, we may perform a qualitative assessment to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a quantitative goodwill impairment test as required by GAAP. Estimating the fair value of each reporting unit requires us to make assumptions and estimates regarding our future. We utilized a combination of discounted cash flows and market approach. The financial projections used in the valuation models reflected management's assumptions regarding revenue growth rates, economic and market trends, cost structure, discount rate and other expectations about the anticipated short-term and long-term operating results for each of our reporting units. We believe the assumptions used in our goodwill impairment analysis are appropriate and result in reasonable estimates of the implied fair value of each reporting unit. However, given the economic environment and other uncertainties that can negatively impact on our business, there can be no assurance that our estimates and assumptions, made for purposes of our goodwill impairment testing, will prove to be an accurate prediction of the future. If our assumptions regarding future performance are not achieved, or if future events occur that adversely affect our enterprise value, we may be required to record additional goodwill impairment charges in future periods. Employee Benefit Plans We provide a range of benefits to our employees and retired employees, including pension, post-retirement, post-employment and health care benefits. We record annual amounts relating to these plans based on calculations specified by GAAP, which include various actuarial assumptions, including discount rates, assumed rates of return, mortality rate tables, compensation increases, turnover rates and health care cost trends. Actuarial assumptions are reviewed on an annual basis and modifications to these assumptions are made based on current rates and trends when it is deemed appropriate. As required by GAAP, the effect of our modifications and unrecognized actuarial gains and losses are generally recorded to a separate component of accumulated other comprehensive income (loss) ("AOCI") in stockholders’ equity and amortized over future periods. Income Taxes Deferred tax liabilities or assets are established for temporary differences between financial and tax reporting basis and are subsequently adjusted to reflect changes in tax rates expected to be in effect when the temporary differences reverse. A valuation allowance is recorded to reduce deferred tax assets to an amount that is more likely than not to be realized. Facts and circumstances may change and cause us to revise our conclusions regarding our ability to realize certain net operating losses and other deferred tax attributes. The amount of income taxes that we pay is subject to ongoing audits by federal, state and foreign tax authorities. Our estimate of the potential outcome of any uncertain tax position is subject to management’s assessment of relevant risks, facts and circumstances existing at that time. We believe that we have adequately provided for reasonably foreseeable outcomes related to these matters. However, our future results may include favorable or unfavorable adjustments to our estimated tax liabilities in the period any assessments are received, revised or resolved. As of December 31, 2024, the Company has recorded $ 4.1 million of deferred taxes on approximately $ 330.7 million of unremitted earnings of non-U.S. subsidiaries that may be remitted to the U.S. The Company has approximately $ 319.5 million of additional unremitted earnings of non-U.S. subsidiaries, which are indefinitely reinvested and for which no deferred taxes have been provided. Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to our customers in an amount reflective of the consideration we expect to receive in exchange for those goods or services. Taxes we collect concurrent with revenue producing activities are excluded from revenue. Incidental items incurred that are immaterial in the context of the contract are expensed. At the inception of each contract, the Company assesses the products and services promised and identifies each distinct performance obligation. To identify the performance obligations, the Company considers all products and services promised regardless of whether they are explicitly stated or implied within the contract or by standard business practices. Products : For our products, we transfer control and recognize a sale primarily when we either ship the product from our manufacturing facility or distribution center, or upon delivery to a customer-specified location depending upon the terms in the customer agreement. In addition, we recognize revenue for private label products as the product is manufactured (or over time) when a contract has an enforceable right to payment. For consignment arrangements, revenue is not recognized until the products are sold to the end customer. Customer Program Costs : Customer programs and incentives ("Customer Program Costs") are a common practice in our industry. We incur Customer Program Costs to obtain favorable product placement, to promote sell-through of products and to maintain competitive pricing. The amount of consideration we receive and revenue we recognize is impacted by Customer Program Costs, including sales rebates; in-store promotional allowances; shared media and customer catalog allowances; other cooperative advertising arrangements; freight allowance programs offered to our customers; and allowances for discounts. We recognize Customer Program Costs, primarily as a deduction to gross sales, at the time that the associated revenue is recognized. Customer Program Costs are based on management's best estimates using the most likely amount method and is an amount that is probable of not being reversed. In the absence of a signed contract, estimates are based on historical or projected experience for each program type or customer. We adjust our estimate of revenue when the most likely amount of consideration we expect to receive changes. Service or Extended Maintenance Agreements ("EMAs"): Depending on the terms of the EMA, we may defer recognition of the consideration received for any unsatisfied obligations. We use an observable price to determine the stand-alone selling price for separate performance obligations or an estimated cost plus margin approach, for our separately priced service/maintenance agreements that extend mechanical and maintenance coverage beyond our base warranty coverage to our Print Finishing Solutions customers. These agreements range in duration from three to sixty month s, however, most agreements are one year or less. We generally receive payment at inception of the EMAs and recognize revenue over the term of the agreement on a straight-line basis. Shipping and Handling : Freight and distribution activities performed before the customer obtains control of the goods are not considered promised services under customer contracts and therefore are not distinct performance obligations. The Company has chosen to account for shipping and handling activities as a fulfillment activity, and therefore accrues the expense of freight and distribution in "Cost of products sold" when products are shipped. We reflect all amounts billed to customers for shipping and handling in net sales and the costs we incurred for shipping and handling (including costs to ship and move product from the seller’s place of business to the buyer’s place of business, as well as costs to store, move and prepare products for shipment) in cost of products sold. Reserve for Sales Returns: The reserve for sales returns represents estimated uncollectible receivables associated with the potential return of products previously sold to customers and is recorded at the same time that the sales are recognized. The reserve includes a general provision for product returns based on historical trends. In addition, the reserve includes amounts for currently authorized customer returns that are considered to be abnormal in comparison to the historical trends. We record the returns reserve, on a gross basis, as a reduction to "Net sales" and "Cost of products sold" with increases to "Other current liabilities" and "Inventories." Cost of Products Sold Cost of products sold includes all manufacturing, product sourcing and distribution costs, including depreciation related to assets used in the manufacturing, procurement and distribution process, allocation of certain information technology costs supporting those processes, inbound and outbound freight, shipping and handling costs, purchasing costs associated with materials and packaging used in the production processes and inventory valuation adjustments. Selling, General and Administrative Expenses Selling, general and administrative expenses ("SG&A") include advertising, marketing, and selling (including commissions) expenses, research and development, customer service, depreciation related to assets outside the manufacturing and distribution processes and all other general and administrative expenses outside the manufacturing and distribution functions (e.g., finance, human resources, information technology, legal and other corporate expenses). Advertising Expenses Advertising expenses were $ 99.3 million , $ 102.7 million and $ 108.8 million for the years ended December 31, 2024, 2023 and 2022, respectively. These costs primarily include, but are not limited to, cooperative advertising and promotional allowances as described in " Customer Program Costs " above and are principally expensed as incurred. Warranty Reserves We offer our customers various warranty terms based on the type of product that is sold. Estimated future obligations related to products sold under these warranty terms are provided by charges to cost of products sold in the same period in which the related revenue is recognized. Research and Development Expenses Research and development expenses were $ 23.0 million , $ 25.8 million and $ 26.3 million for the years ended December 31, 2024, 2023 and 2022 , respectively, are classified as SG&A expenses and are charged to expense as incurred. Stock-Based Compensation Our primary types of stock-based compensation provided for under our current incentive plan consist of stock options, restricted stock unit awards and performance stock unit awards. Stock-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense over the requisite service period. Where awards are made with non-substantive vesting periods (for example, where a portion of the award vests due to retirement eligibility), we estimate and recognize expense based on the period from the grant date to the date on which the employee is retirement eligible. The Company accounts for forfeitures as they occur. Foreign Currency Translation Foreign currency balance sheet accounts are translated into U.S. dollars at the rates of exchange at the balance sheet date. Income and expenses are translated at the average rates of exchange in effect during the period. The related translation adjustments are made directly to a separate component of AOCI in stockholders’ equity. Some transactions are made in currencies different from an entity’s functional currency; gains and losses on these foreign currency transactions are included in the income statement. Derivative Financial Instruments We recognize all derivatives as either assets or liabilities on the balance sheet and record those instruments at fair value. If the derivative is designated as a fair value hedge and is effective, the changes in the fair value of the derivative and of the hedged item attributable to the hedged risk are recognized in earnings in the same period. If the derivative is designated as a cash flow hedge, the effective portions of changes in the fair value of the derivative are recorded in AOCI and are recognized in the Consolidated Statements of Income when the hedged item affects earnings. Ineffective portions of changes in the fair value of cash flow hedges are recognized in earnings. Certain forecasted transactions, and assets and liabilities are exposed to foreign currency risk. We continually monitor our foreign currency exposures in order to maximize the overall effectiveness of our foreign currency hedge positions. Principal currencies hedged against the U.S. dollar include the Euro, Australian dollar, Canadian dollar, Swedish krona, British pound and Japanese yen. Recent Accounting Pronouncements In November 2024, the Financial Accounting Standards Board ("FASB") issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures, (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires a public entity to disaggregate certain expense captions into specified categories in disclosures within the footnotes to the financial statements. This ASU is effective for annual periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027, with early adoption permitted. We are evaluating the effect this guidance will have on the notes to our consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which enhances the income tax disclosures to provide information to better assess how an entity’s operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. This ASU is effective for annual periods beginning after December 15, 2024, with early adoption permitted. We are evaluating the effect this guidance will have on our tax disclosures. There were no other recently issued accounting standards that are expected to have an impact on the Company’s financial condition, results of operations or cash flow. Recently Adopted Accounting Standards In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires a public entity to disclose significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. The ASU does not change how a public entity identifies its operating segments, aggregates them, or applies the quantitative thresholds to determine its reportable segments. Effective in the fourth quarter of 2024, the Company adopted this standard. See "Note 17. Information on Operating Segments" for further details. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides optional expedients and exceptions for applying current GAAP to contracts, hedging relationships, and other transactions affected by the transition from the use of LIBOR to an alternative reference rate. Effective in the fourth quarter of 2022, the Company adopted this standard. The adoption of this standard did not have a material impact on our consolidated financial statements. There were no other accounting standards that were adopted in 2024, 2023 and 2022 that had a material effect on the Company’s financial condition, results of operations or cash flow.

Long-term Debt and Short-term B

Long-term Debt and Short-term Borrowings	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Long-term Debt and Short-term Borrowings	4.25 2.25 % 1.25 % 0.375 % > 3.5 2.00 % 1.00 % 0.350 % > 2.5 1.75 % 0.75 % 0.300 % ≤ 2.5 1.50 % 0.50 % 0.250 % As of December 31, 2024 , the applicable rate on Euro, Australian and Canadian dollar loans was 2.00 percent and the applicable rate on Base Rate loans was 1.00 percent. Undrawn amounts under the Revolving Facility are subject to a commitment fee rate of 0.25 percent to 0.375 percent per annum, depending on the Company's Consolidated Leverage Ratio. As of December 31, 2024 , the commitment fee rate was 0.35 percent. As of December 31, 2024, there was $ 126.3 million in borrowings outstanding under the Revolving Facility ( $ 34.4 million reported in "Current portion of long-term debt" and $ 91.9 million reported in "Long-term debt, net"), and the amount available for borrowings was $ 329.6 million (allowing for $ 11.6 million of letters of credit outstanding on that date). Amortization The outstanding principal amounts under the Euro Term Loan Facility are payable in quarterly installments in an amount representing, on an annual basis, 1.25 percent of the initial aggregate principal amount of such loan facility and increasing to 1.875 percent in March 2027 and further increasing to 2.50 percent in March 2029. Dividends and Share Repurchases Under the Credit Agreement, the Company may pay dividends and/or repurchase shares in an aggregate amount not to exceed the sum of: (i) the greater of $ 40.0 million and 1 percent of the Company’s Consolidated Total Assets (as defined in the Credit Agreement) during any fiscal year; plus (ii) an additional amount not to exceed $ 75.0 million during any fiscal year (provided the Company’s Consolidated Leverage Ratio after giving pro forma effect to the restricted payment is 0.25x inside the applicable Consolidated Leverage Ratio financial covenant); plus (iii) an additional amount so long as the Consolidated Leverage Ratio after giving pro forma effect to the restricted payment would be less than or equal to 3.25x; plus (iv) any Net Equity Proceeds (as defined in the Credit Agreement). Financial Covenants As of December 31, 2024, our Consolidated Leverage Ratio was approximately 3.38 to 1.00 versus our maximum covenant of 4.00 to 1.00. Our Interest Coverage Ratio was approximately 5.35 to 1.00 versus the minimum financial covenant of 3.00 to 1.00. Other Covenants and Restrictions The Credit Agreement, contains customary affirmative and negative covenants as well as events of default, including payment defaults, breach of representations and warranties, covenant defaults, cross-defaults, certain bankruptcy or insolvency events, certain ERISA-related events, changes in control or ownership and invalidity of any loan document. The Credit Agreement also establishes limitations on the aggregate amount of Permitted Acquisitions and Investments (each as defined in the Credit Agreement) that the Company and its subsidiaries may make during the term of the Credit Agreement. Incremental Facilities The Credit Agreement permits the Company to seek increases in the size of the Revolving Facility and the Term Loan Facility prior to maturity by up to $ 500.0 million in the aggregate, subject to lender commitment and the conditions set forth in the Credit Agreement. Senior Unsecured Notes due March 2029 (the "Senior Unsecured Notes") The Senior Unsecured Notes indenture contains covenants that could limit the ability of the Company and its restricted subsidiaries to, among other things: (i) incur additional indebtedness or issue disqualified stock or, in the case of the Company’s restricted subsidiaries, preferred stock; (ii) create liens; (iii) pay dividends, make certain investments or make other restricted payments; (iv) sell certain assets or merge with or into other companies; (v) enter into transactions with affiliates; and (vi) allow limitations on any restricted subsidiary to pay dividends, loans, or assets to the Company or other restricted subsidiaries. These covenants are subject to a number of important limitations and exceptions. The Senior Unsecured Notes indenture also provides for events of default, which, if any of them occurs, would permit or require the principal, premium, if any, and accrued but unpaid interest on all the then outstanding Senior Unsecured Notes to be immediately due and payable. Compliance with Loan Covenants As of and for the periods ended December 31, 2024, and December 31, 2023, the Company was in compliance with all applicable loan covenants under its senior secured credit facilities and the Senior Unsecured Notes. Guarantees and Security Generally, obligations under the Credit Agreement are guaranteed by certain of the Company's existing and future subsidiaries and are secured by substantially all of the Company's and certain guarantor subsidiaries' assets, subject to certain exclusions and limitations. The Senior Unsecured Notes are irrevocably and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by each of our existing and future domestic subsidiaries other than certain excluded subsidiaries. The Senior Unsecured Notes and the related guarantees rank equally in right of payment with all of the existing and future senior debt of the Company and the guarantors, senior in right of payment to all of the existing and future subordinated debt of the Company and the guarantors, and are effectively subordinated to all of the existing and future secured indebtedness of the Company and the guarantors to the extent of the value of the assets securing such indebtedness. The Senior Unsecured Notes and the guarantees are and will be structurally subordinated to all existing and future liabilities, including trade payables, of each of the Company's subsidiaries that do not guarantee the Senior Unsecured Notes." id="sjs-B4">3 . Long-term Debt and Short-term Borrowings Notes payable and long-term debt, listed in order of the priority of security interests in assets of the Company, consisted of the following as of December 31, 2024 and 2023: (in millions) December 31, December 31, Euro Senior Secured Term Loan A, due October 2029 (floating interest rate of 4.68 % at December 31, 2024 and 5.93 % at December 31, 2023) $ 127.9 $ 218.2 USD Senior Secured Term Loan A (floating interest rate of 7.50 % at December 31, 2023) — 78.0 Australian Dollar Senior Secured Term Loan A (floating interest rate of 6.42 % at December 31, 2023) — 32.5 Euro Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 4.68 % at December 31, 2024) 59.1 — U.S. Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.47 % at December 31, 2024 and 7.40 % at December 31, 2023) 34.4 7.3 Australian Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.44 % at December 31, 2024 and 6.42 % at December 31, 2023) 32.8 14.3 Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25 %) 575.0 575.0 Other borrowings 10.5 0.3 Total debt 839.7 925.6 Less: Current portion 51.3 36.7 Debt issuance costs, unamortized 5.1 6.7 Long-term debt, net $ 783.3 $ 882.2 The Company is party to a Third Amended and Restated Credit Agreement, dated as of January 27, 2017, among the Company, certain subsidiaries of the Company, Bank of America, N.A., as administrative agent, and the other agents and various lenders party thereto, which has been amended seven times between July 2018 and October 2024 (as amended, the "Credit Agreement"). The Credit Agreement currently provides for a senior secured credit facility, which consists of a € 184.8 million (US$ 200.0 million based on October 30, 2024 exchange rates) term loan facility, and a US$ 467.5 million multi-currency revolving credit facility (the "Revolving Facility"). Prior to the seventh amendment which was effective October 30, 2024, the Credit Agreement provided for a senior secured credit facility, which consisted of a € 300.0 million (US$ 320.8 million based on January 27, 2017, exchange rates) term loan facility, an A$ 80.0 million (US$ 60.4 million based on January 27, 2017, exchange rates) term loan facility, a US$ 100.0 million term loan facility and a US$ 600.0 million multi-currency revolving credit facility. The current financial covenants under the Credit Agreement are as follows: • Minimum Interest Coverage Ratio (as defined in the Credit Agreement) of 3.00 :1.00; and • Maximum Consolidated Leverage Ratio financial covenant for all first and second fiscal quarters is 4.50x dropping to 4.00x for all third and fourth fiscal quarters. The current pricing for borrowings under the Credit Agreement is as follows: Consolidated Leverage Ratio Applicable Rate on Euro/AUD/CDN Dollar Loans Applicable Rate on Base Rate Loans Undrawn Fee > 4.25 2.25 % 1.25 % 0.375 % > 3.5 2.00 % 1.00 % 0.350 % > 2.5 1.75 % 0.75 % 0.300 % ≤ 2.5 1.50 % 0.50 % 0.250 % As of December 31, 2024 , the applicable rate on Euro, Australian and Canadian dollar loans was 2.00 percent and the applicable rate on Base Rate loans was 1.00 percent. Undrawn amounts under the Revolving Facility are subject to a commitment fee rate of 0.25 percent to 0.375 percent per annum, depending on the Company's Consolidated Leverage Ratio. As of December 31, 2024 , the commitment fee rate was 0.35 percent. As of December 31, 2024, there was $ 126.3 million in borrowings outstanding under the Revolving Facility ( $ 34.4 million reported in "Current portion of long-term debt" and $ 91.9 million reported in "Long-term debt, net"), and the amount available for borrowings was $ 329.6 million (allowing for $ 11.6 million of letters of credit outstanding on that date). Amortization The outstanding principal amounts under the Euro Term Loan Facility are payable in quarterly installments in an amount representing, on an annual basis, 1.25 percent of the initial aggregate principal amount of such loan facility and increasing to 1.875 percent in March 2027 and further increasing to 2.50 percent in March 2029. Dividends and Share Repurchases Under the Credit Agreement, the Company may pay dividends and/or repurchase shares in an aggregate amount not to exceed the sum of: (i) the greater of $ 40.0 million and 1 percent of the Company’s Consolidated Total Assets (as defined in the Credit Agreement) during any fiscal year; plus (ii) an additional amount not to exceed $ 75.0 million during any fiscal year (provided the Company’s Consolidated Leverage Ratio after giving pro forma effect to the restricted payment is 0.25x inside the applicable Consolidated Leverage Ratio financial covenant); plus (iii) an additional amount so long as the Consolidated Leverage Ratio after giving pro forma effect to the restricted payment would be less than or equal to 3.25x; plus (iv) any Net Equity Proceeds (as defined in the Credit Agreement). Financial Covenants As of December 31, 2024, our Consolidated Leverage Ratio was approximately 3.38 to 1.00 versus our maximum covenant of 4.00 to 1.00. Our Interest Coverage Ratio was approximately 5.35 to 1.00 versus the minimum financial covenant of 3.00 to 1.00. Other Covenants and Restrictions The Credit Agreement, contains customary affirmative and negative covenants as well as events of default, including payment defaults, breach of representations and warranties, covenant defaults, cross-defaults, certain bankruptcy or insolvency events, certain ERISA-related events, changes in control or ownership and invalidity of any loan document. The Credit Agreement also establishes limitations on the aggregate amount of Permitted Acquisitions and Investments (each as defined in the Credit Agreement) that the Company and its subsidiaries may make during the term of the Credit Agreement. Incremental Facilities The Credit Agreement permits the Company to seek increases in the size of the Revolving Facility and the Term Loan Facility prior to maturity by up to $ 500.0 million in the aggregate, subject to lender commitment and the conditions set forth in the Credit Agreement. Senior Unsecured Notes due March 2029 (the "Senior Unsecured Notes") The Senior Unsecured Notes indenture contains covenants that could limit the ability of the Company and its restricted subsidiaries to, among other things: (i) incur additional indebtedness or issue disqualified stock or, in the case of the Company’s restricted subsidiaries, preferred stock; (ii) create liens; (iii) pay dividends, make certain investments or make other restricted payments; (iv) sell certain assets or merge with or into other companies; (v) enter into transactions with affiliates; and (vi) allow limitations on any restricted subsidiary to pay dividends, loans, or assets to the Company or other restricted subsidiaries. These covenants are subject to a number of important limitations and exceptions. The Senior Unsecured Notes indenture also provides for events of default, which, if any of them occurs, would permit or require the principal, premium, if any, and accrued but unpaid interest on all the then outstanding Senior Unsecured Notes to be immediately due and payable. Compliance with Loan Covenants As of and for the periods ended December 31, 2024, and December 31, 2023, the Company was in compliance with all applicable loan covenants under its senior secured credit facilities and the Senior Unsecured Notes. Guarantees and Security Generally, obligations under the Credit Agreement are guaranteed by certain of the Company's existing and future subsidiaries and are secured by substantially all of the Company's and certain guarantor subsidiaries' assets, subject to certain exclusions and limitations. The Senior Unsecured Notes are irrevocably and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by each of our existing and future domestic subsidiaries other than certain excluded subsidiaries. The Senior Unsecured Notes and the related guarantees rank equally in right of payment with all of the existing and future senior debt of the Company and the guarantors, senior in right of payment to all of the existing and future subordinated debt of the Company and the guarantors, and are effectively subordinated to all of the existing and future secured indebtedness of the Company and the guarantors to the extent of the value of the assets securing such indebtedness. The Senior Unsecured Notes and the guarantees are and will be structurally subordinated to all existing and future liabilities, including trade payables, of each of the Company's subsidiaries that do not guarantee the Senior Unsecured Notes.

Leases

Leases	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Leases	4 . Leases The Company leases its corporate headquarters, various other facilities for distribution, manufacturing and offices, as well as vehicles, forklifts and other equipment. The Company determines if an arrangement is a lease at inception. Leases are included in "Right of use asset, leases" ("ROU Assets"), and the current portion of the lease liability is included in "Lease liabilities" and the non-current portion is included in "Long-term lease liabilities" in the Consolidated Balance Sheets. The Company currently has an immaterial amount of financing leases and leases with terms of more than one month and less than 12 months. ROU Assets and Lease liabilities are recognized based on the present value of lease payments over the lease term. In determining the present value of leases, the Company uses its incremental collateralized borrowing rate, on a regional basis, due to the implicit rate of return is generally not readily determinable for our leases. The incremental borrowing rate is dependent upon the duration of the lease and has been segmented into three groups of time. All leases within the same region and the same group of time share the same incremental borrowing rate. The Company has lease agreements with lease and non-lease components, which are combined for accounting purposes for all classes of underlying assets except information technology equipment. The components of lease expense for the years ended December 31, 2024, 2023 and 2022, were as follows: (in millions) 2024 2023 2022 Operating lease cost $ 29.0 $ 28.6 $ 29.5 Sublease income ( 3.1 ) ( 2.5 ) ( 2.4 ) Total lease cost $ 25.9 $ 26.1 $ 27.1 Other information related to leases for the years ended December 31, 2024 and 2023 was as follows: Twelve Months Ended (in millions, except lease term and discount rate) 2024 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 27.9 $ 29.8 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 19.5 $ 23.2 Weighted average remaining lease term: Operating leases 5.6 years Weighted average discount rate: Operating leases 5.3 % Future minimum lease payments, net of sub-lease income, for all non-cancelable leases as of December 31, 2024 were as follows: (in millions) Operating 2025 26.2 2026 21.4 2027 16.6 2028 13.6 2029 10.6 Thereafter 17.8 Total minimum lease payments 106.2 Less imputed interest 17.8 Future minimum payments for leases, net of sublease rental income and imputed interest $ 88.4

Pension and Other Retiree Benef

Pension and Other Retiree Benefits	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Pension and Other Retiree Benefits	5 . Pension and Other Retiree Benefits We have a number of pension plans, principally in Germany, the U.K. and the U.S. The plans provide for payment of retirement benefits, primarily commencing between the ages of 60 and 65 , and also for payment of certain disability and severance benefits. After meeting certain qualifications, an employee acquires a vested right to future benefits. The benefits payable under the plans are generally determined based on an employee’s length of service and earnings. The majority of these plans have been frozen and are no longer accruing additional service benefits. Cash contributions to the plans are made as necessary to ensure legal funding requirements are satisfied. The ACCO Brands Corporation Pension Plan was fully and permanently frozen as of December 31, 2021. In 2019, the Esselte U.K. plan was frozen and merged with the legacy ACCO U.K. plan, which was frozen on September 30, 2012. As of December 31, 2016, our Canadian Salaried and Hourly pension plans were frozen. Effective July 1, 2022, the Company announced its plan to terminate those Canadian pension plans. During 2024, we finalized the settlement of the entire benefit obligation for the Canadian Salaried and Hourly pension plans resulting in a final settlement cost of $ 4.5 million. Our German Esselte Leitz Pension Plan had an unfunded liability of $ 98.0 million and $ 109.9 million for the years ended December 31, 2024, and 2023, respectively. As is customary, there are no plans to, and there is no requirement to, fund the German Pension Plan other than to meet the current liabilities. We also provide post-retirement health care and life insurance benefits to certain employees and retirees in the U.S., U.K. and Canada. All but one of these benefit plans is no longer open to new participants. Many employees and retirees outside of the U.S. are covered by government health care programs. In June 2023, the High Court handed down a decision in the case of Virgin Media Limited v NTL Pension Trustees II Limited and others relating to the validity of certain historical pension changes due to the lack of actuarial confirmation required by law. In July 2024, the Court of Appeal dismissed the appeal brought by Virgin Media Ltd against aspects of the June 2023 decision. The conclusions reached by the court in this case may have implications for other UK defined benefit plans. The following table sets forth our defined benefit pension and post-retirement plans funded status and the amounts recognized in our Consolidated Balance Sheets: Pension Post-retirement U.S. International (in millions) 2024 2023 2024 2023 2024 2023 Change in projected benefit obligation (PBO) Projected benefit obligation at beginning of year $ 162.6 $ 162.3 $ 467.4 $ 441.1 $ 3.3 $ 3.2 Service cost — — 0.6 0.5 — — Interest cost 7.7 7.9 18.5 20.0 0.2 0.2 Actuarial (gain) loss ( 9.1 ) 3.2 ( 34.4 ) 14.6 0.5 0.1 Participants’ contributions — — 0.1 0.1 — — Benefits paid ( 10.7 ) ( 10.8 ) ( 27.7 ) ( 27.0 ) ( 0.3 ) ( 0.3 ) Settlement — — ( 15.1 ) ( 3.9 ) — — Foreign exchange rate changes — — ( 12.9 ) 22.0 ( 0.1 ) 0.1 Projected benefit obligation at end of year 150.5 162.6 396.5 467.4 3.6 3.3 Change in plan assets Fair value of plan assets at beginning of year 145.5 140.2 324.9 306.4 — — Actual return on plan assets 7.6 13.6 ( 8.4 ) 18.9 — — Employer contributions 3.0 2.5 14.5 14.1 0.3 0.3 Participants’ contributions — — 0.1 0.1 — — Benefits paid ( 10.7 ) ( 10.8 ) ( 27.7 ) ( 27.0 ) ( 0.3 ) ( 0.3 ) Settlement — — ( 15.1 ) ( 4.0 ) — — Foreign exchange rate changes — — ( 5.4 ) 16.4 — — Fair value of plan assets at end of year 145.4 145.5 282.9 324.9 — — Funded status (Fair value of plan assets less PBO) $ ( 5.1 ) $ ( 17.1 ) $ ( 113.6 ) $ ( 142.5 ) $ ( 3.6 ) $ ( 3.3 ) Amounts recognized in the Consolidated Balance Sheets consist of: Other non-current assets $ — $ — $ 2.5 $ 2.5 $ — $ — Other current liabilities — — 7.2 7.5 0.4 0.3 Pension and post-retirement benefit obligations 5.1 17.1 108.9 137.5 3.2 3.0 Components of accumulated other comprehensive income (loss), net of tax: Unrecognized actuarial loss (gain) 84.4 90.7 121.9 139.9 ( 2.6 ) ( 3.6 ) Unrecognized prior service cost — — 4.9 5.2 — — Pension and post-retirement benefit obligations of $ 117.2 million as of December 31, 2024, decreased from $ 157.6 million as of December 31, 2023. The decrease was primarily due to updated assumptions and foreign exchange, partly offset by cash contributions. The accumulated benefit obligation for all pension plans was $ 542.9 million and $ 625.1 million at December 31, 2024 and 2023, respectively. The following table sets out information for pension plans with an accumulated benefit obligation in excess of plan assets: U.S. International (in millions) 2024 2023 2024 2023 Accumulated benefit obligation (1) $ 150.5 $ 162.6 $ 116.8 $ 437.4 Fair value of plan assets 145.4 145.5 4.0 297.2 (1) The decrease in 2024 under International as compared to 2023 is the result of the ACCO U.K. plan ABO no longer being in excess of plan assets as of December 31, 2024, unlike the prior year. The following table sets out information for pension plans with a projected benefit obligation in excess of plan assets: U.S. International (in millions) 2024 2023 2024 2023 Projected benefit obligation $ 150.5 $ 162.6 $ 385.1 $ 442.1 Fair value of plan assets 145.4 145.5 268.9 297.2 The components of net periodic benefit (income) cost for pension and post-retirement plans for the years ended December 31, 2024, 2023 and 2022, were as follows: Year Ended December 31, Pension Post-retirement U.S. International (in millions) 2024 2023 2022 2024 2023 2022 2024 2023 2022 Service cost $ — $ — $ — $ 0.6 $ 0.5 $ 1.0 $ — $ — $ — Interest cost 7.7 7.9 4.9 18.5 20.0 9.6 0.2 0.2 0.1 Expected return on plan assets ( 12.9 ) ( 12.0 ) ( 10.9 ) ( 19.6 ) ( 21.5 ) ( 17.5 ) — — — Amortization of net loss (gain) 2.5 2.2 3.7 5.4 4.2 5.0 ( 0.6 ) ( 0.5 ) ( 0.5 ) Amortization of prior service cost — — — 0.3 0.3 0.3 — — — Special termination benefit (2) — — — — — 0.8 — — — Settlement (3) — — — 4.6 1.2 — — — — Net periodic benefit (income) cost (4) $ ( 2.7 ) $ ( 1.9 ) $ ( 2.3 ) $ 9.8 $ 4.7 $ ( 0.8 ) $ ( 0.4 ) $ ( 0.3 ) $ ( 0.4 ) (2) Special termination benefit of $ 0.8 million due to the plan wind-up of our Canadian Salaried and Hourly pension plans effective July 1, 2022. (3) Settlement amounts of $ 4.6 million in 2024 and $ 1.2 million in 2023 are primarily related to the wind-up of our Canadian Salaried and Hourly pension plans. (4) The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense (income)" in the Consolidated Statements of Loss . Other changes in plan assets and benefit obligations that were recognized in accumulated other comprehensive income (loss) during the years ended December 31, 2024, 2023 and 2022 were as follows: Pension Post-retirement U.S. International (in millions) 2024 2023 2022 2024 2023 2022 2024 2023 2022 Current year actuarial (gain) loss $ ( 3.8 ) $ 1.6 $ ( 1.0 ) $ ( 6.5 ) $ 17.2 $ ( 23.9 ) $ 0.5 $ 0.1 $ ( 0.6 ) Amortization of actuarial (loss) gain ( 2.5 ) ( 2.2 ) ( 3.7 ) ( 9.9 ) ( 5.2 ) ( 5.1 ) 0.5 0.5 0.5 Amortization of prior service cost — — — ( 0.3 ) ( 0.3 ) ( 0.3 ) — — — Foreign exchange rate changes — — — ( 1.7 ) 7.5 ( 21.5 ) 0.1 ( 0.1 ) 0.2 Total recognized in other comprehensive (loss) income ( 6.3 ) ( 0.6 ) ( 4.7 ) ( 18.4 ) 19.2 ( 50.8 ) 1.1 0.5 0.1 Total recognized in net periodic benefit (income) cost and other comprehensive (loss) income $ ( 9.0 ) $ ( 2.5 ) $ ( 7.0 ) $ ( 8.6 ) $ 23.9 $ ( 51.6 ) $ 0.7 $ 0.2 $ ( 0.3 ) Assumptions The weighted average assumptions used to determine benefit obligations for the years ended December 31, 2024, 2023, and 2022 were as follows: Pension Post-retirement U.S. International 2024 2023 2022 2024 2023 2022 2024 2023 2022 Discount rate 5.7 % 5.0 % 5.1 % 4.8 % 4.2 % 4.5 % 5.2 % 4.8 % 3.8 % Rate of compensation increase N/A N/A N/A 3.0 % 2.9 % 3.0 % N/A N/A N/A The weighted average assumptions used to determine net periodic benefit (income) cost for the years ended December 31, 2024, 2023, and 2022 were as follows: Pension Post-retirement U.S. International 2024 2023 2022 2024 2023 2022 2024 2023 2022 Discount rate 5.0 % 5.1 % 2.9 % 4.2 % 4.5 % 1.8 % 4.8 % 5.0 % 2.4 % Expected long-term rate of return 8.0 % 7.5 % 6.5 % 6.2 % 6.9 % 4.0 % N/A N/A N/A Rate of compensation increase N/A N/A N/A 2.9 % 3.0 % 3.0 % N/A N/A N/A The weighted average health care cost trend rates used to determine post-retirement benefit obligations and net periodic benefit (income) cost as of December 31, 2024, 2023 and 2022 were as follows: Post-retirement 2024 2023 2022 Health care cost trend rate assumed for next year 10 % 9 % 6 % Rate that the cost trend rate is assumed to decline (the ultimate trend rate) 8 % 7 % 5 % Year that the rate reaches the ultimate trend rate 2031 2031 2030 Plan Assets The investment strategy for the Company is to optimize investment returns through a diversified portfolio of investments, taking into consideration underlying plan liabilities and asset volatility. Each plan has a different target asset allocation, which is reviewed periodically and is based on the underlying liability structure. The target asset allocation for our U.S. plan is 38 percent in equity securities, 54 percent in fixed income securities and 8 percent in alternative assets. The target asset allocation for non-U.S. plans is set by the local plan trustees. Our pension plan weighted average asset allocations as of December 31, 2024 and 2023 were as follows: 2024 2023 U.S. International U.S. International Asset category Equity securities 34 % 6 % 37 % 7 % Fixed income 59 % 59 % 57 % 63 % Real estate 4 % 2 % 4 % 3 % Other (5) 3 % 33 % 2 % 27 % Total 100 % 100 % 100 % 100 % (5) Multi-strategy hedge funds, commodity linked funds, private equity funds, and cash and cash equivalents for certain of our plans. U.S. Pension Plan Assets The fair value measurements of our U.S. pension plan assets by asset category as of December 31, 2024 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2024 Mutual funds $ 110.9 $ — $ — $ 110.9 Exchange traded funds 33.1 — — 33.1 Common collective trust funds — 1.4 — 1.4 Total $ 144.0 $ 1.4 $ — $ 145.4 The fair value measurements of our U.S. pension plan assets by asset category as of December 31, 2023 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2023 Mutual funds $ 106.1 $ — $ — $ 106.1 Exchange traded funds 38.3 — — 38.3 Common collective trust funds — 1.1 — 1.1 Total $ 144.4 $ 1.1 $ — $ 145.5 Mutual funds and exchange traded funds: The fair values of mutual fund and common stock fund investments are determined by obtaining quoted prices on nationally recognized securities exchanges (level 1 inputs). Common collective trusts : The fair values of participation units held in common collective trusts are based on their net asset values, as reported by the managers of the common collective trusts and as supported by the unit prices of actual purchase and sale transactions occurring as of or close to the financial statement date (level 2 inputs). International Pension Plans Assets The fair value measurements of our international pension plans assets by asset category as of December 31, 2024 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2024 Cash and cash equivalents $ 3.1 $ — $ — $ 3.1 Equity securities 17.4 — — 17.4 Corporate debt securities — 62.0 — 62.0 Multi-strategy hedge funds — 33.7 — 33.7 Insurance contracts — 4.2 — 4.2 Real estate — 0.8 — 0.8 Government debt securities — 105.5 — 105.5 Investments measured at net asset value (6) Multi-strategy hedge funds 29.2 Real estate 4.3 Private equity 22.7 Total $ 20.5 $ 206.2 $ — $ 282.9 (6) Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in these tables are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the table that presents our defined benefit pension and post-retirement plans funded status. The fair value measurements of our international pension plans assets by asset category as of December 31, 2023 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2023 Cash and cash equivalents $ 6.4 $ — $ — $ 6.4 Equity securities 20.4 2.7 — 23.1 Corporate debt securities — 73.6 — 73.6 Multi-strategy hedge funds — 30.2 — 30.2 Insurance contracts — 4.1 — 4.1 Real estate — 3.7 — 3.7 Government debt securities — 131.3 — 131.3 Investments measured at net asset value (6) Multi-strategy hedge funds 24.7 Real estate 5.9 Private equity 21.9 Total $ 26.8 $ 245.6 $ — $ 324.9 Equity securities and exchange traded funds: The fair values of equity securities are determined by obtaining quoted prices on nationally recognized securities exchanges (level 1 inputs). Debt securities: Fixed income securities, such as corporate and government bonds and other debt securities, consist of index-linked securities. These debt securities are valued using quotes from independent pricing vendors based on recent trading activity and other relevant information, including market interest rate curves, referenced credit spreads, and estimated prepayment rates, where applicable (level 2 inputs). Insurance contracts: Valued at contributions made, plus earnings, less participant withdrawals and administrative expenses, which approximate fair value (level 2 inputs). Multi-strategy hedge funds : The fair values of participation units held in multi-strategy hedge funds are based on their net asset values, as reported by the managers of the funds and are based on the daily closing prices of the underlying investments (level 2 inputs). Real estate: Real estate consists of managed real estate investment trust securities (level 2 inputs). Cash Contributions We contributed $ 17.8 million to our pension and post-retirement plans in 2024 and expect to contribute approximately $ 16.0 million in 2025. The following table presents estimated future benefit payments to participants for the next ten fiscal years: (in millions) Pension Benefits Post-retirement Benefits 2025 $ 40.2 $ 0.4 2026 39.0 0.4 2027 39.2 0.4 2028 40.0 0.4 2029 40.2 0.3 Years 2030 - 2034 208.3 1.5 We also sponsor a number of defined contribution plans. Contributions are determined under various formulas. Costs related to such plans amounted to $ 12.5 million , $ 12.5 million and $ 13.2 million for the years ended December 31, 2024, 2023 and 2022, respectively. Multi-Employer Pension Plan We are a participant in a multi-employer pension plan. The plan has reported significant underfunded liabilities and declared itself in critical and declining status (red). As a result, the trustees of the plan adopted a rehabilitation plan ("RP") in an effort to forestall insolvency. Our required contributions to this plan could increase due to the shrinking contribution base resulting from the insolvency of or withdrawal of other participating employers, from the inability or the failure of withdrawing participating employers to pay their withdrawal liability, from lower than expected returns on pension fund assets, and from other funding deficiencies. In the event that we withdraw from participation in the plan, we will be required to make withdrawal liability payments for a period of 20 years or longer in certain circumstances. The present value of our withdrawal liability payments would be recorded as an expense in our Consolidated Statements of Loss and as a liability on our Consolidated Balance Sheets in the first year of our withdrawal. The most recent Pension Protection Act ("PPA") zone status available in 2024 and 2023 is for the plan’s years ended December 31, 2023, and 2022, respectively. The zone status is based on information that we received from the plan and is certified by the plan’s actuary. Plans in the red zone (critical or critical and declining) are generally less than 65 percent funded, plans in the yellow zone (endangered) are less than 80 percent funded, and plans in the green zone (safe) are at least 80 percent funded. The Company's contributions are not more than 5 percent of the total contributions to the plan . Details regarding the plan are outlined in the table below. EIN/Pension Plan Pension Protection Act Zone Status FIP/RP Status Pending Contributions Year Ended December 31, Surcharge Expiration Date of Collective-Bargaining Pension Fund Number 2024 2023 Implemented 2024 2023 2022 Imposed Agreement PACE Industry Union-Management Pension Fund 11-6166763 / 001 Red Red Implemented $ 0.1 $ 0.1 $ 0.1 Yes 6/30/2028

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	6 . Stock-Based Compensation The 2022 ACCO Brands Corporation Incentive Plan, as amended (the "Plan") provides for stock-based awards generally in the form of stock options, restricted stock units ("RSUs") and performance stock units ("PSUs"), any of which may be granted alone or with other types of awards and dividend equivalents. The Plan authorizes the issuance of up to 15,994,631 shares to key employees and non-employee directors. The Company accrues dividend equivalents ("DEs") on all outstanding RSUs and PSUs as permitted by the Plan. DEs entitle holders of RSUs and PSUs to the same dividend value per share as holders of common stock. RSUs and PSUs are credited with DEs that are converted to RSUs and PSUs at the fair market value of our common stock on the dates the dividend payments are made and are subject to the same terms and conditions as the underlying award. DEs credited to RSUs and PSUs will only be paid to the extent the awards vest and any performance goals are achieved. We will satisfy the requirement for delivering shares of our common stock for the Plan by issuing new shares. The following table summarizes the impact of all stock-based compensation expense on our Consolidated Statements of Loss for the years ended December 31, 2024, 2023 and 2022: (in millions) 2024 2023 2022 Selling, general and administrative expense $ 11.9 $ 14.8 $ 9.5 (Loss) income before income tax ( 11.9 ) ( 14.8 ) ( 9.5 ) Income tax expense ( 2.9 ) ( 3.4 ) ( 2.2 ) Net loss $ ( 9.0 ) $ ( 11.4 ) $ ( 7.3 ) There was no capitalization of stock-based compensation expense. Stock-based compensation expense by award type for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 Stock option compensation expense $ 0.5 $ 2.7 $ 3.7 RSU compensation expense 7.5 6.4 4.4 PSU compensation expense 3.9 5.7 1.4 Total stock-based compensation expense $ 11.9 $ 14.8 $ 9.5 Stock Options The exercise price of each stock option equals or exceeds the fair market price of our stock on the date of grant. Options granted beginning in 2020 can generally be exercised over a term of ten years and prior to 2020 options could generally be exercised over a term of seven years . Stock options outstanding as of December 31, 2024 , generally vest ratably over three years from the grant date. There were no stock options granted during the years ended December 31, 2024 and 2023 . The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model and the weighted average assumptions as outlined in the following table: Year Ended December 31, 2022 Weighted average expected lives 6.0 years Weighted average risk-free interest rate 1.89 % Weighted average expected volatility 41.7 % Expected dividend yield 3.60 % Weighted average grant date fair value $ 2.43 The weighted average expected option term of the Company's "plain vanilla" stock options granted during the year ended December 31, 2022 reflect the application of the simplified method, as prescribed by Staff Accounting Bulletin Topic 14. The simplified method was used as the Company does not believe it has sufficient historical exercise data to provide a reasonable basis for the expected term of its stock option grants. The simplified method will be used until such time as the Company has stock option exercise experience in which to reasonably determine the expected life. The risk-free interest rate for the expected term of the option is based on the U.S. Treasury yield curve in effect at the time of grant. Volatility is calculated using ACCO Brands' historic volatility. A summary of the changes in stock options outstanding under the Plan during the year ended December 31, 2024 is presented below: Number Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Outstanding at December 31, 2023 6,625,226 $ 9.26 Forfeited/Expired ( 913,930 ) $ 11.27 Outstanding at December 31, 2024 5,711,296 $ 8.94 4.7 years zero Exercisable shares at December 31, 2024 5,212,811 4.5 years zero There were no options exercised during the years ended December 31, 2024 and 2023. We received cash of $ 4.3 million from the exercise of stock options during the year ended December 31, 2022. The aggregate intrinsic value of options exercised during the year ended December 31, 2022 totaled $ 0.5 million . The fair value of options vested during the years ended December 31, 2024, 2023, and 2022 was $ 2.5 million , $ 3.4 million and $ 3.1 million , respectively. As of December 31, 2024, we had unrecognized compensation expense related to stock options of $ 0.1 million , which will be recognized over a weighted-average period of 0.2 years. Stock Unit Awards RSUs vest over a pre-determined period of time, generally three years from the date of grant. Stock-based compensation expense for the years ended December 31, 2024, 2023 and 2022 includes $ 1.4 million , $ 1.3 million and $ 1.2 million , respectively, of expense related to RSUs granted to non-employee directors as a component of their compensation. RSUs granted to non-employee directors prior to 2021 became fully vested on the grant date; after 2021 non-employee director RSUs fully vest on the first anniversary of the grant date. PSUs also vest over a pre-determined period of time, generally not longer than three years , but are further subject to the achievement of certain business performance criteria being met. Based upon the level of achieved performance, the number of shares actually awarded can vary from 0 percent to 200 percent of the original grant. There were 4,241,889 RSUs outstanding as of December 31, 2024. All outstanding RSUs as of December 31, 2024 vest within three years of their date of grant. Upon vesting, all of the RSU awards will be converted into the right to receive one share of common stock of the Company for each unit that vests. The cost of these awards is determined using the fair value of the shares on the date of grant, and compensation expense is generally recognized over the period during which the employee provides the requisite service to the Company. A summary of the changes in the RSUs outstanding under the Plan during 2024 is presented below: Stock Weighted Average Grant Date Fair Value Outstanding at December 31, 2023 3,444,450 $ 6.63 Granted 1,501,759 $ 5.31 Vested and distributed ( 253,634 ) $ 8.43 Vested and deferred distributed ( 133,273 ) $ 7.71 Forfeited and cancelled ( 317,413 ) $ 6.09 Outstanding at December 31, 2024 4,241,889 $ 6.06 Vested and deferred at December 31, 2024 (1) 767,216 $ 7.80 (1) Included in outstanding at December 31, 2024 . Vested and deferred RSUs are primarily related to deferred compensation for non-employee directors. For the years ended December 31, 2023 and 2022, we granted 1,969,191 and 695,057 RSUs, respectively. The weighted-average grant date fair value of our RSUs was $ 5.31 , $ 5.23 , and $ 8.15 for the years ended December 31, 2024, 2023 and 2022, respectively. The fair value of RSUs that vested during the years ended December 31, 2024, 2023 and 2022 was $ 3.3 million , $ 4.4 million and $ 5.1 million , respectively. As of December 31, 2024, we have unrecognized compensation expense related to RSUs of $ 7.0 million , which will be recognized over a weighted-average period of 1.9 years. A summary of the changes in the PSUs outstanding under the Plan during 2024 is presented below: Stock Weighted Average Grant Date Fair Value Outstanding at December 31, 2023 1,771,690 $ 6.48 Granted 1,825,683 $ 5.80 Vested and distributed ( 685,998 ) $ 6.74 Forfeited and cancelled ( 319,295 ) $ 5.65 Other - increase due to performance of PSUs 954,162 $ 5.21 Outstanding at December 31, 2024 3,546,242 $ 5.81 For the years ended December 31, 2023 and 2022, we granted 2,301,907 and 1,170,884 PSUs, respectively. For the years ended December 31, 2024, 2023 and 2022, 685,998 , 336,077 and 350,656 PSUs vested, respectively. The weighted-average grant date fair value of our PSUs was $ 5.80 , $ 5.39 , and $ 8.88 for the years ended December 31, 2024, 2023 and 2022, respectively. The fair value of PSUs that vested during the years ended December 31, 2024, 2023 and 2022 was $ 4.6 million , $ 2.8 million and $ 3.0 million , respectively. Based on the level of achievement of the performance targets associated with the PSU awards, as of December 31, 2024, we have $ 4.4 million of unrecognized compensation expense, which will be recognized over a weighted-average period of 1.5 years.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2024
Inventory Disclosure [Abstract]
Inventories	7 . Inventories The components of inventories were as follows: (in millions) 2024 2023 Raw materials $ 35.9 $ 50.1 Work in process 3.3 4.7 Finished goods 231.2 272.7 Total inventories $ 270.4 $ 327.5

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net	8 . Property, Plant and Equipment, Net The components of net property, plant and equipment were as follows: December 31 (in millions) 2024 2023 Land and improvements $ 17.4 $ 20.9 Buildings and improvements to leaseholds 115.4 130.7 Machinery and equipment 365.2 442.9 Construction in progress 7.5 5.1 505.5 599.6 Less: accumulated depreciation ( 368.0 ) ( 429.5 ) Net property, plant and equipment (1) $ 137.5 $ 170.1 (1) Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

Goodwill and Identifiable Intan

Goodwill and Identifiable Intangible Assets	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Identifiable Intangible Assets	9 . Goodwill and Identifiable Intangible Assets Goodwill We test goodwill for impairment at least annually as of our measurement date of May 31st and on an interim basis if an event or circumstance indicates that it is more likely than not that an impairment loss has been incurred. During the second quarter of 2024, we identified triggering events within our Americas reporting unit indicating that it was more likely than not that an impairment loss had been incurred. The triggering events included a decline in forecasted cash flows within specific product categories, and a decline in our stock price. Accordingly, as of May 31, 2024, we completed an impairment assessment, on a quantitative basis, of goodwill for both the Americas and International reporting units. The result of our assessment was that the fair value of the Americas reporting unit did not exceed its carrying value resulting in an impairment charge of $ 127.5 million. The result of our assessment was that the fair value of the International reporting unit exceeded its carrying value and we concluded that no impairment existed. Estimating the fair value of each reporting unit requires us to make assumptions and estimates regarding our future. We utilized a combination of discounted cash flows and market approach. The financial projections used in the valuation models reflected management's assumptions regarding revenue growth rates, economic and market trends, cost structure, discount rate, and other expectations about the anticipated short-term and long-term operating results for each of our reporting units. We believe the assumptions used in our goodwill impairment analysis are appropriate and result in reasonable estimates of the implied fair value of each reporting unit. However, given the economic environment and uncertainties that can negatively impact our business, there can be no assurance that our estimates and assumptions, made for purposes of our goodwill impairment testing, will prove to be an accurate prediction of the future. If our assumptions regarding future performance are not achieved, or if future events occur that adversely affect our enterprise value, we may be required to record additional goodwill impairment charges in future periods. Changes in the net carrying amount of goodwill by segment were as follows: (in millions) ACCO Brands Americas ACCO Brands International Total Balance at December 31, 2022 $ 472.2 $ 199.3 $ 671.5 Goodwill impairment ( 89.5 ) — ( 89.5 ) Foreign currency translation 0.9 7.1 8.0 Balance at December 31, 2023 $ 383.6 $ 206.4 $ 590.0 Goodwill impairment ( 127.5 ) — ( 127.5 ) Foreign currency translation ( 2.8 ) ( 13.3 ) ( 16.1 ) Balance at December 31, 2024 $ 253.3 $ 193.1 $ 446.4 The goodwill balance includes $ 313.8 million, $ 403.3 million, and $ 530.8 million of accumulated impairment losses for the years ended December 31, 2022, 2023, and 2024, respectively. Identifiable Intangible Assets We test indefinite-lived intangibles for impairment at least annually as of our measurement date of May 31st and on an interim basis if an event or circumstance indicates that it is more likely than not that an impairment loss has been incurred. During the second quarter of 2024, we identified a triggering event for our indefinite-lived trade names within our Americas reporting unit indicating that it was more likely than not that an impairment loss had been incurred. The triggering event was a decline in forecasted cash flows within certain product categories. Accordingly, as of May 31, 2024, we completed an impairment assessment, on a quantitative basis, for our indefinite-lived trade names. The result of our assessment was that the fair value of the Five Star ® indefinite-lived trade name did not exceed its carrying value resulting in an impairment charge of $ 37.7 million. The result of our assessment of the Swingline ® and ACCO ® indefinite-lived trade names was that the fair value of each exceeded its carrying value and we concluded that no impairment existed. Estimating the fair value of each trade name requires us to make assumptions and estimates regarding our future. We utilized a relief-from-royalty discounted cash flows approach. The financial projections used in the valuation models reflected management's assumptions regarding revenue growth rates, economic and market trends, royalty rate, discount rate, and other expectations about the anticipated short-term and long-term operating results for each of our indefinite-lived trade names. We believe the assumptions used in our impairment analysis are appropriate and result in reasonable estimates of the implied fair value of each of our indefinite-lived trade names. However, given the economic environment and the uncertainties regarding the impact on our business, there can be no assurance that our estimates and assumptions, made for purposes of our indefinite-lived intangible impairment testing, will prove to be an accurate prediction of the future. As of June 1, 2024, we changed our Five Star ® and Swingline ® indefinite-lived trade names to amortizable intangible assets as they no longer met the indefinite-lived criteria. We began amortizing both trade names on a straight-line basis over a life of 30 years as of June 1, 2024. The Company's gross carrying value and accumulated amortization by class of identifiable intangible assets as of December 31, 2024 and 2023 were as follows: December 31, 2024 December 31, 2023 (in millions) Gross Carrying Amounts Accumulated Amortization Net Book Value Gross Carrying Amounts Accumulated Amortization Net Book Value Indefinite-lived intangible assets: Trade names (1) (2) $ 101.2 $ ( 44.5 ) $ 56.7 $ 295.1 $ ( 44.5 ) $ 250.6 Amortizable intangible assets: Trade names (2) 627.5 ( 157.5 ) 470.0 497.1 ( 142.0 ) 355.1 Customer and contractual relationships 350.7 ( 230.0 ) 120.7 362.4 ( 221.3 ) 141.1 Vendor relationships 82.4 ( 22.2 ) 60.2 82.4 ( 16.7 ) 65.7 Patents 7.8 ( 5.8 ) 2.0 8.2 ( 5.0 ) 3.2 Subtotal 1,068.4 ( 415.5 ) 652.9 950.1 ( 385.0 ) 565.1 Total identifiable intangibles $ 1,169.6 $ ( 460.0 ) $ 709.6 $ 1,245.2 $ ( 429.5 ) $ 815.7 (1) Accumulated amortization prior to the adoption of authoritative guidance on goodwill and other intangible assets, at which time further amortization ceased. (2) Reflects the change of our Five Star ® and Swingline ® indefinite-lived trade names to amortizable intangible assets as of June 1, 2024. The Company’s intangible amortization expense was $ 44.7 million , $ 43.4 million and $ 41.5 million for the years ended December 31, 2024, 2023 and 2022, respectively. Estimated amortization expense for amortizable intangible assets for the next five years is as follows: (in millions) 2025 2026 2027 2028 2029 Estimated amortization expense (3) $ 44.8 $ 42.8 $ 40.4 $ 38.3 $ 36.6 (3) Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization of intangible assets and other events.

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
Restructuring	10 . Restructuring The Company recorded $ 16.8 million , $ 27.2 million and $ 9.6 million of restructuring charges for the years ended December 31, 2024, 2023 and 2022, respectively. Restructuring charges were primarily for severance costs related to cost reduction initiatives for all segments in 2024, 2023 and 2022. The summary of the activity in the restructuring liability for the year ended December 31, 2024 was as follows: (in millions) Balance at December 31, 2023 Provision Cash Expenditures Non-cash Items/Currency Change Balance at December 31, 2024 Employee termination costs (1) $ 27.5 $ 16.6 $ ( 17.0 ) $ ( 0.5 ) $ 26.6 Other 0.9 0.2 ( 1.1 ) — — Total restructuring liability $ 28.4 $ 16.8 $ ( 18.1 ) $ ( 0.5 ) $ 26.6 (1) We expect the remaining $ 26.6 million of employee termination costs to be substantially paid within the next twelve months . The summary of the activity in the restructuring accounts for the year ended December 31, 2023 was as follows: (in millions) Balance at December 31, 2022 Provision Cash Expenditures Non-cash Items/Currency Change Balance at December 31, 2023 Employee termination costs $ 8.7 $ 26.1 $ ( 7.6 ) $ 0.3 $ 27.5 Other — 1.1 ( 0.2 ) — 0.9 Total restructuring liability $ 8.7 $ 27.2 $ ( 7.8 ) $ 0.3 $ 28.4 The summary of the activity in the restructuring accounts for the year ended December 31, 2022 was as follows: (in millions) Balance at December 31, 2021 Provision Cash Expenditures Non-cash Items/Currency Change Balance at December 31, 2022 Employee termination costs $ 3.4 $ 9.4 $ ( 4.0 ) $ ( 0.1 ) $ 8.7 Termination of lease agreements 1.1 ( 0.2 ) ( 0.9 ) — — Other — 0.4 ( 0.4 ) — — Total restructuring liability $ 4.5 $ 9.6 $ ( 5.3 ) $ ( 0.1 ) $ 8.7 Restructuring charges for the years ended December 31, 2024, 2023 and 2022 by reporting segment were as follows: (in millions) 2024 2023 2022 ACCO Brands Americas $ 6.5 $ 16.7 $ 6.0 ACCO Brands International 6.9 9.9 3.4 Corporate 3.4 0.6 0.2 Total restructuring charges $ 16.8 $ 27.2 $ 9.6

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	11 . Income Taxes The components of (loss) income before income tax for the years ended December 31, 2024, 2023 and 2022 were as follows: (in millions) 2024 2023 2022 Domestic operations $ ( 173.0 ) $ ( 124.8 ) $ ( 80.1 ) Foreign operations 85.7 111.7 95.0 Total $ ( 87.3 ) $ ( 13.1 ) $ 14.9 The reconciliation of income taxes computed at the U.S. federal statutory income tax rate of 21 percent to our effective income tax rate for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 Income tax at U.S. statutory rate; 21 % $ ( 18.3 ) $ ( 2.7 ) $ 3.1 Unrecognized tax expense (benefits) ( 2.8 ) 1.0 ( 7.6 ) Statutory tax rate changes — 0.4 0.6 Statutory tax law changes — ( 3.6 ) — State, local and other tax, net of federal benefit ( 2.0 ) ( 1.3 ) 1.6 Impact from foreign inclusions 0.6 ( 0.7 ) 4.0 U.S. effect of foreign dividends and withholding taxes 4.1 3.9 1.8 Foreign income taxed at a higher effective rate 4.3 4.2 3.1 Brazilian Tax Assessments impact ( 1.6 ) ( 13.3 ) 1.9 Increase (decrease) in valuation allowance 2.4 5.4 3.4 General business credit ( 0.4 ) ( 2.2 ) ( 1.9 ) Excess expense from stock-based compensation 1.3 0.6 0.5 Impairment of non-deductible goodwill 26.8 18.8 20.7 Impact of legal entity rationalization — ( 4.1 ) Prior period tax return adjustment 0.1 ( 1.0 ) ( 0.1 ) Other (decrease) increase ( 0.2 ) ( 0.8 ) 1.1 Income taxes as reported $ 14.3 $ 8.7 $ 28.1 Effective tax rate ( 16.4 )% ( 66.4 )% 188.6 % For 2024, we recorded income tax expense of $ 14.3 million on loss before taxes of $ 87.3 million , for an effective rate of ( 16.4 ) percent. The increase in the effective rate versus 2023 was primarily due to a larger non-cash impairment charge related to goodwill in 2024 compared to 2023. In addition, the release of certain unrecognized tax benefits related to the Brazil Tax Assessments in 2023 which did not repeat in 2024, partially offset by a reduction in pretax book income. For 2023, we recorded income tax expense of $ 8.7 million on a loss income before taxes of $ 13.1 million , for an effective rate of ( 66.4 ) percent. The decrease in the effective rate versus 2022 was primarily due to the reduction in pretax book income, tax law changes allowing Brazilian taxes paid to be creditable for U.S. tax purposes and the release of certain unrecognized tax benefits related to the Brazil Tax Assessments. For 2022, we recorded income tax expense of $ 28.1 million on income before taxes of $ 14.9 million , for an effective rate of 188.6 percent. The components of the income tax expense for the years ended December 31, 2024, 2023 and 2022 were as follows: (in millions) 2024 2023 2022 Current expense Federal and other $ ( 3.2 ) $ 0.2 $ 1.8 Foreign 24.4 28.6 25.0 Total current income tax expense 21.2 28.8 26.8 Deferred expense (benefit) Federal and other $ ( 7.0 ) $ ( 16.7 ) $ 6.8 Foreign 0.1 ( 3.4 ) ( 5.5 ) Total deferred income tax (benefit) expense ( 6.9 ) ( 20.1 ) 1.3 Total income tax expense $ 14.3 $ 8.7 $ 28.1 The components of deferred tax assets (liabilities) as of December 31, 2024 and 2023 were as follows: (in millions) 2024 2023 Deferred tax assets Compensation and benefits $ 20.3 $ 23.0 Pension 14.4 23.4 Inventory 8.1 10.4 Other reserves 13.9 18.9 Accounts receivable 5.1 7.4 Foreign tax credit carryforwards 6.8 6.4 Net operating loss carryforwards 74.8 76.7 Interest expense carryforwards 34.1 26.3 Section 174 capitalization 16.1 17.3 General business tax credit carryforwards 1.8 3.4 Other 2.1 5.2 Gross deferred income tax assets 197.5 218.4 Valuation allowance ( 60.3 ) ( 59.2 ) Net deferred tax assets 137.2 159.2 Deferred tax liabilities Depreciation ( 3.8 ) ( 5.7 ) Unremitted non-U.S. earnings accrual ( 4.1 ) ( 4.0 ) Identifiable intangibles ( 151.9 ) ( 170.4 ) Other — Gross deferred tax liabilities ( 159.8 ) ( 180.1 ) Net deferred tax liabilities $ ( 22.6 ) $ ( 20.9 ) A valuation allowance of $ 60.3 million and $ 59.2 million as of December 31, 2024 and 2023 , respectively, has been established for deferred income tax assets. The $ 1.1 million increase in the valuation allowance in 2024 reflects the increase in our existing valuation by $ 2.4 million, partly offset by a $ 1.3 million decrease resulting from foreign currency translation. The valuation allowance is primarily related to net operating loss (the "NOL") carryforwards that may not be realized. Realization of the net deferred income tax assets is dependent upon generating sufficient taxable income prior to the expiration of the applicable carryforward periods. Although realization is not certain, management believes that it is more likely than not that the net deferred income tax assets will be realized. However, the amount of net deferred tax assets considered realizable could change in the near term if estimates of future taxable income during the applicable carryforward periods fluctuate. As of December 31, 2024, the Company has state NOL tax benefits of $ 13.9 million which will expire between December 31, 2025 and December 31, 2034. As of December 31, 2024, the Company has $ 1.8 million of federal general business credit carryforwards which will expire on December 31, 2044. As of December 31, 2024, the Company had $ 6.8 million of foreign tax credit carryforwards of which $ 4.9 million will expire on December 31, 2027 and $ 1.9 million will expire on December 31, 2034. As of December 31, 2024, the Company has foreign NOLs of $ 266.2 million and tax benefits of $ 60.9 million , most of which have unlimited carryforward periods. As of December 31, 2024, the Company has recorded $ 4.1 million of deferred taxes on approximately $ 330.7 million of unremitted earnings of non-U.S. subsidiaries that may be remitted to the U.S. The Company has approximately $ 319.5 million of additional unremitted earnings of non-U.S. subsidiaries, which are indefinitely reinvested and for which no deferred taxes have been provided. A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 Balance at beginning of year $ 28.0 $ 39.1 $ 43.3 Additions for tax positions of prior years 3.5 3.6 2.5 Reductions for tax positions of prior years ( 5.6 ) ( 17.7 ) ( 8.3 ) Increase (decrease) resulting from foreign currency translation ( 5.2 ) 3.0 1.6 Balance at end of year $ 20.7 $ 28.0 $ 39.1 As of December 31, 2024, the amount of unrecognized tax benefits decreased to $ 20.7 million , all of which would impact our effective tax rate, if recognized. We expect the amount of unrecognized tax benefits to change within the next twelve months including releases of previously recorded reserves of approximately $ 2.4 million. Interest and penalties related to unrecognized tax benefits are recognized within "Income tax expense" in the Consolidated Statements of Income. As of December 31, 2024, we have accrued a cumulative $ 13.0 million for interest and penalties on the unrecognized tax benefits primarily related to the Brazil Tax Assessments. As of December 31, 2024 , the U.S. federal statute of limitations remains open for the year 2021 and forward. Foreign and U.S. state jurisdictions have statutes of limitations generally ranging from 2 to 6 years . As of December 31, 2024 , years still open to examination by foreign tax authorities in major jurisdictions include Australia ( 2020 forward), Brazil ( 2019 forward), Canada ( 2019 forward), Germany ( 2020 forward), Sweden ( 2023 forward) and the U.K. ( 2023 forward). We are currently under examination in the U.S. and various foreign jurisdictions. Organisation for Economic Co-operation and Development (“OECD”) Global Anti-Base Erosion Model Rules (Pillar Two) Legislatures and taxing authorities in many jurisdictions in which we operate may enact changes to, or seek to enforce, novel interpretations of their tax rules. These changes may include modifications that can be temporary or permanent. For example, the Organisation for Economic Cooperation and Development (the "OECD"), the European Union and other countries (including countries in which we operate) have committed to enacting substantial changes to numerous long-standing tax principles impacting how large multinational enterprises are taxed. In particular, the OECD's Pillar Two initiative introduces a 15 % global minimum tax (the "Global Minimum Tax") applied on a country-by-country basis and some jurisdictions have enacted a Global Minimum Tax effective January 1, 2024 while others are still evaluating the situation. As of December 31, 2024, there was no impact to our effective tax rate resulting from the enactment of a Global Minimum Tax in the jurisdictions in which we operate. Management will continue to assess the impact and materiality of these potential new rules as well as any other changes in domestic and international tax rules and regulations. Brazil Tax Assessments In connection with our May 1, 2012, acquisition of the Mead Consumer and Office Products business ("Mead C&OP"), we assumed all of the tax liabilities for the acquired foreign operations including ACCO Brazil. In December of 2012, the Federal Revenue Department of the Ministry of Finance of Brazil ("FRD") issued a tax assessment against ACCO Brazil, challenging the tax deduction of goodwill from ACCO Brazil's taxable income for the year 2007 (the "First Assessment"). A second assessment challenging the deduction of goodwill from ACCO Brazil's taxable income for the years 2008, 2009 and 2010 was issued by FRD in October 2013 (the "Second Assessment" and together with the First Assessment, the "Brazil Tax Assessments"). The final administrative appeal of the Second Assessment was decided against the Company in 2017. In 2018, we challenged this decision to the first judicial level. In the fourth quarter of 2022, this case was decided against the Company by the first level judicial court. We have appealed this decision to the second judicial level. In the event we do not prevail at the judicial level, we will be required to pay an additional penalty representing attorneys' costs and fees. Accordingly, in the first quarter of 2019, the Company recorded an additional reserve in the amount of $ 5.6 million. In connection with the judicial challenge, we were required to provide security to guarantee payment of the Second Assessment should we not prevail. In the third quarter of 2020, the final administrative appeal of the First Assessment was decided against the Company and we determined that we would challenge this decision. In 2022, we challenged this adverse decision in the tax authority's lawsuit at the judicial level seeking to collect the tax. In connection with the judicial challenge, we were required to provide security to guarantee payment of the First Assessment should we not prevail. We believe we have meritorious defenses and intend to vigorously contest both of the Brazil Tax Assessments; however, there can be no assurances that we will ultimately prevail. The ultimate outcome will not be determined until the Brazilian judicial process is complete. It is possible we could have a final decision regarding the Second Assessment in the next two years. If the FRD's initial position is ultimately sustained, payment of the amount assessed would materially and adversely affect our cash flow in the year of settlement. Because there is no settled legal precedent on which to base a definitive opinion as to whether we will ultimately prevail, we consider the outcome of this dispute to be uncertain. Since it is not more likely than not that we will prevail, in 2012, we recorded a reserve in the amount of $ 44.5 million (at December 31, 2012 exchange rates) in consideration of this contingency, of which $ 43.3 million was recorded as an adjustment to the purchase price and which included the 2007-2012 tax years plus penalties and interest through December 2012. During the third quarter of 2023, there was a change in Brazilian law which allowed us to seek cancellation of the 75 percent standard penalty that would be payable in the event we do not prevail in our actions challenging the Brazil Tax Assessments. Following completion of the necessary administrative procedures, during the fourth quarter of 2023, the Company reduced its reserve for this contingency by $ 13.3 million, representing the amount of the cancelled penalties, as well as interest and other fees related to those penalties. We will continue to actively monitor administrative and judicial court decisions and evaluate their impact, if any, on our legal assessment of the ultimate outcome of our disputes. In addition, we will continue to accrue interest related to this contingency until such time as the outcome is known or until evidence is presented that we are more likely than not to prevail. During the years ended December 31, 2024, 2023 and 2022, we accrued additional interest as a charge to current income tax expense of $ 0.6 million , $ 0.9 million and $ 1.5 million , respectively. Our accrual through December 31, 2024, including tax, penalties and interest, is $ 17.8 million (at December 31, 2024 exchange rates, reported in "Other non-current liabilities").

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Earnings per Share	12 . Earnings per Share Total outstanding shares as of December 31, 2024, 2023, and 2022 were 92.9 million , 94.9 million and 94.3 million , respectively. Under our stock repurchase authorization, for the years ended December 31, 2024 and 2022 there were 2.9 million and 2.7 million shares repurchased and retired, respectively. For the year ended December 31, 2023, we did no t repurchase any shares. For the years ended December 31, 2024, 2023, and 2022, we acquired 0.4 million , 0.3 million and 0.3 million shares, respectively, related to tax withholding in connection with stock-based compensation. The calculation of basic earnings per share of common stock is based on the weighted-average number of shares of common stock outstanding in the year, or period, over which they were outstanding. Except when the impact would be anti-dilutive, our calculation of diluted earnings per share of common stock assumes that the number of shares of common stock outstanding is increased by shares that would be issued upon exercise of those stock awards for which the average market price for the period exceeds the exercise price less the shares that could have been purchased by the Company with the related proceeds, including compensation expense measured but not yet recognized. Our weighted-average shares outstanding for the years ended December 31, 2024, 2023, and 2022 were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Weighted-average number of shares of common stock outstanding - basic 95.6 95.3 95.3 Effect of dilutive securities: Restricted stock units — — — Weighted-average shares and assumed conversions - diluted (1) 95.6 95.3 95.3 (1) Due to the net loss during the twelve months ended December 31, 2024, 2023 and 2022 , diluted earnings per share are the same as basic earnings per share. Awards of potentially dilutive shares of common stock, which have exercise prices that were higher than the average market price during the period, are not included in the computation of dilutive earnings per share as their effect would have been anti-dilutive. For the years ended December 31, 2024, 2023, and 2022, the number of anti-dilutive shares were approximately 10.1 million , 9.9 million and 9.8 million , respectively.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	13 . Derivative Financial Instruments We are exposed to various market risks, including changes in foreign currency exchange rates and interest rate changes. We enter into financial instruments to manage and reduce the impact of these risks, not for trading or speculative purposes. The counterparties to these financial instruments are major financial institutions. We continually monitor our foreign currency exposures in order to maximize the overall effectiveness of our foreign currency hedge positions. Principal currencies hedged against the U.S. dollar include the Euro, Australian dollar, Canadian dollar, Swedish krona, British pound and Japanese yen. We are subject to credit risk, which relates to the ability of counterparties to meet their contractual payment obligations or the potential non-performance by counterparties to financial instrument contracts. Management continues to monitor the status of our counterparties and will take action, as appropriate, to further manage our counterparty credit risk. There are no credit contingency features in our derivative financial instruments. When hedge accounting is applicable, on the date we enter into a derivative, the derivative is designated as a hedge of the identified exposure. We measure the effectiveness of our hedging relationships both at hedge inception and on an ongoing basis. Forward Currency Contracts We enter into forward foreign currency contracts with third parties to reduce the effect of fluctuating foreign currencies, primarily on foreign denominated inventory purchases and intercompany loans. Our primary exposure to currency movements is in the Euro, the Swedish krona, the British pound, the Brazilian real, the Australian dollar, the Canadian dollar, and the Mexican peso. Forward currency contracts are used to hedge foreign denominated inventory purchases for Europe, Australia, Canada, Japan and New Zealand, and are designated as cash flow hedges. Unrealized gains and losses on these contracts are deferred in AOCI until the contracts are settled and the underlying hedged transactions relating to inventory purchases are recognized, at which time the deferred gains or losses will be reported in the "Cost of products sold" line in the Consolidated Statements of Income. As of December 31, 2024 and 2023, we had cash flow foreign exchange contracts outstanding with a U.S. dollar equivalent notional value of $ 76.9 million and $ 80.2 million , respectively, which were designated as hedges. Forward currency contracts used to hedge foreign denominated intercompany loans are not designated as hedging instruments. Gains and losses on these derivative instruments are recognized within "Other expense (income), net" in the Consolidated Statements of Income and are largely offset by the change in the current translated value of the hedged item. The periods of the forward foreign exchange contracts correspond to the periods of the hedged transactions, with some relating to intercompany loans which extend beyond December 2025. As of December 31, 2024 and 2023, we had foreign exchange contracts outstanding with a U.S. dollar equivalent notional value of $ 73.6 million and $ 102.3 million , respectively, which were not designated as hedges. The following table summarizes the fair value of our derivative financial instruments as of December 31, 2024 and 2023: Fair Value of Derivative Instruments Derivative Assets Derivative Liabilities (in millions) Balance Sheet Location December 31, December 31, Balance Sheet Location December 31, December 31, Derivatives designated as hedging instruments: Foreign exchange contracts Other current assets $ 4.0 $ 0.3 Other current liabilities $ — $ 1.6 Derivatives not designated as hedging instruments: Foreign exchange contracts Other current assets 0.3 1.0 Other current liabilities 0.3 0.1 Foreign exchange contracts Other non-current assets 9.0 3.2 Other non-current liabilities 9.0 3.2 Total derivatives $ 13.3 $ 4.5 $ 9.3 $ 4.9 The following tables summarize the pre-tax effect of the Company’s derivative financial instruments on the Consolidated Statements of Income for the years ended December 31, 2024, 2023, and 2022: The Effect of Derivative Instruments in Cash Flow Hedging Relationships on the Consolidated Financial Statements Amount of Gain (Loss) Recognized in AOCI (Effective Portion) Location of (Gain) Loss Reclassified from AOCI to Income Amount of (Gain) Loss Reclassified from AOCI to Income (Effective Portion) (in millions) 2024 2023 2022 2024 2023 2022 Cash flow hedges: Foreign exchange contracts $ 5.1 $ 0.4 $ 9.8 Cost of products sold $ ( 1.3 ) $ ( 2.8 ) $ ( 14.0 ) The Effect of Derivatives Not Designated as Hedging Instruments on the Consolidated Financial Statements Location of (Gain) Loss Recognized in Income on Derivatives Amount of (Gain) Loss Recognized in Income (in millions) 2024 2023 2022 Foreign exchange contracts Other (income) expense, net $ ( 4.5 ) $ 0.1 $ ( 3.7 )

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	14 . Fair Value of Financial Instruments In establishing a fair value, there is a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The basis of the fair value measurement is categorized in three levels, in order of priority, as described below: Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities Level 2 Unadjusted quoted prices in active markets for similar assets or liabilities, or Unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or Inputs other than quoted prices that are observable for the asset or liability Level 3 Unobservable inputs for the asset or liability We utilize the best available information in measuring fair value. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. We have determined that our financial assets and liabilities described in "Note 13 . Derivative Financial Instruments" are Level 2 in the fair value hierarchy. The following table sets forth our financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2024 and 2023: (in millions) December 31, December 31, Assets: Forward currency contracts $ 13.3 $ 4.5 Liabilities: Forward currency contracts $ 9.3 $ 4.9 Our forward currency contracts are included in "Other current assets," "Other current liabilities," "Other non-current assets," or "Other non-current liabilities." The forward foreign currency exchange contracts are primarily valued based on the foreign currency spot and forward rates quoted by banks or foreign currency dealers. As such, these derivative instruments are classified within Level 2. The fair values of cash and cash equivalents, notes payable to banks, accounts receivable and accounts payable approximate carrying amounts due principally to their short maturities. The carrying amount of total debt was $ 839.7 million and $ 925.6 million , and the estimated fair value of total debt was $ 789.4 million and $ 870.9 million , each as of December 31, 2024 and 2023, respectively. The fair values are determined from quoted market prices, where available, and from using current interest rates based on credit ratings and the remaining terms of maturity. Non-recurring Fair Value Measurements On a non-recurring basis, we remeasure the fair value of the goodwill of our reporting units and of our trade name indefinite-lived intangibles if an event or circumstance indicates that it is more likely than not that an impairment loss has been incurred. The fair value of our reporting units and trade names are considered Level 3 measurements. Level 3 measurements require significant unobservable inputs that are reflected in our assumptions. See "Note 9 . Goodwill and Identifiable Intangible Assets" for more information.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	15 . Accumulated Other Comprehensive Income (Loss) AOCI is defined as net income (loss) and other changes in stockholders’ equity from transactions and other events from sources other than stockholders. The components of, and changes in, AOCI were as follows: (in millions) Derivative Financial Instruments Foreign Currency Adjustments Unrecognized Pension and Other Post-retirement Benefit Costs Accumulated Other Comprehensive Income (Loss) Balance at December 31, 2022 $ 1.1 $ ( 380.1 ) $ ( 161.3 ) $ ( 540.3 ) Other comprehensive income (loss) before reclassifications, net of tax 0.2 30.3 ( 20.0 ) 10.5 Amounts reclassified from accumulated other comprehensive income (loss), net of tax ( 2.0 ) — 5.5 3.5 Balance at December 31, 2023 $ ( 0.7 ) $ ( 349.8 ) $ ( 175.8 ) $ ( 526.3 ) Other comprehensive income (loss) before reclassifications, net of tax 3.6 ( 66.1 ) 9.1 ( 53.4 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax ( 0.8 ) — 8.4 7.6 Balance at December 31, 2024 $ 2.1 $ ( 415.9 ) $ ( 158.3 ) $ ( 572.1 ) The reclassifications out of AOCI for the years ended December 31, 2024, 2023, and 2022 were as follows: Year ended December 31, (in millions) 2024 2023 2022 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Location on Income Statement Gain (loss) on cash flow hedges: Foreign exchange contracts $ 1.3 $ 2.8 $ 14.0 Cost of products sold Tax benefit ( 0.5 ) ( 0.8 ) ( 4.1 ) Income tax expense Net of tax $ 0.8 $ 2.0 $ 9.9 Defined benefit plan items: Amortization of net actuarial loss (1) $ ( 11.1 ) $ ( 5.9 ) $ ( 8.2 ) Amortization of prior service cost (1) ( 0.3 ) ( 0.3 ) ( 0.3 ) Total before tax ( 11.4 ) ( 6.2 ) ( 8.5 ) Tax benefit 3.0 0.7 1.6 Income tax expense Net of tax $ ( 8.4 ) $ ( 5.5 ) $ ( 6.9 ) Total reclassifications for the period, net of tax $ ( 7.6 ) $ ( 3.5 ) $ 3.0 (1) These AOCI components are included in the computation of net periodic benefit (income) cost for pension and post-retirement plans (See "Note 5 . Pension and Other Retiree Benefits" for additional details).

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition	16 . Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to our customers in an amount reflective of the consideration we expect to be received in exchange for those goods or services. Taxes we collect concurrent with revenue producing activities are excluded from revenue. Incidental items incurred that are immaterial in the context of the contract are expensed. At the inception of each contract, the Company assesses the products and services promised and identifies each distinct performance obligation. To identify the performance obligations, the Company considers all products and services promised regardless of whether they are explicitly stated or implied within the contract or by standard business practices. Freight and distribution activities performed before the customer obtains control of the goods are not considered promised services under customer contracts and therefore are not distinct performance obligations. The Company has chosen to account for shipping and handling activities as a fulfillment activity, and therefore accrues the expense of freight and distribution in "Cost of products sold" when product is shipped. As of December 31, 2023, there was $ 2.9 million of unearned revenue associated with outstanding service or extended maintenance agreements ("EMAs"), primarily reported in "Other current liabilities." During the year ended December 31, 2024, $ 2.5 million of the unearned revenue was earned and recognized. As of December 31, 2024, the amount of unearned revenue from EMAs was $ 2.9 million . We expect to earn and recognize approximately $ 2.4 million of the unearned amount in the next 12 months and $ 0.5 million in periods beyond the next 12 months . The following tables present our net sales disaggregated by regional geography (1) , based upon our operating segments for the years ended December 31, 2024, 2023, and 2022, and our net sales disaggregated by the timing of revenue recognition for the years ended December 31, 2024, 2023, and 2022: (in millions) 2024 2023 2022 United States $ 719.7 $ 796.2 $ 894.1 Canada 88.0 95.0 108.8 Latin America 192.2 244.5 197.5 ACCO Brands Americas 999.9 1,135.7 1,200.4 EMEA (1) 521.8 547.2 580.3 Australia/N.Z. 112.3 118.5 125.6 Asia 32.2 31.4 41.3 ACCO Brands International 666.3 697.1 747.2 Net sales (2) $ 1,666.2 $ 1,832.8 $ 1,947.6 (1) ACCO Brands EMEA is comprised largely of Europe, but also includes export sales to the Middle East and Africa. (2) Net sales are attributed to geographic areas based on the location of the selling subsidiaries . (in millions) 2024 2023 2022 Product and services transferred at a point in time $ 1,629.7 $ 1,794.1 $ 1,899.5 Product and services transferred over time 36.5 38.7 48.1 Net sales $ 1,666.2 $ 1,832.8 $ 1,947.6

Information on Operating Segmen

Information on Operating Segments	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Information on Operating Segments	17 . Information on Operating Segments Effective January 1, 2024, the Company reorganized into two operating segments, the Americas and International. The Americas includes the U.S., Canada, Brazil, Mexico and Chile, and International includes EMEA, Australia, New Zealand and Asia. Prior period results have been reclassified to reflect this change in our operating segments. The new organization structure aligns with how our Chief Operating Decision Maker ("CODM"), Thomas W. Tedford, President and Chief Executive Officer , analyzes and evaluates the Company's performance. The CODM reviews discrete financial results at the operating segment level to assess performance and allocate resources. This includes net revenue, gross margins, operating income, restructuring expense, components of working capital investments, and other ratio performance metrics. The significant expense categories and amounts align with the segment-level information that is regularly provided to the CODM. The Company's two operating segments are as follows: Operating Segment Geography Primary Brands Primary Products ACCO Brands Americas United States, Canada and Latin America Five Star ® , PowerA ® , Tilibra ® , AT-A-GLANCE ® , Kensington ® , Quartet ® , GBC ® , Mead ® , Swingline ® , Barrilito ® , Foroni ® and Hilroy ® Note taking products, computer and gaming accessories; planners; workspace machines, tools and essentials and dry erase boards and accessories. ACCO Brands International EMEA, Australia/N.Z., and Asia Leitz ® , Rapid ® , Kensington ® , Esselte ® , Rexel ® , PowerA ® , GBC ® , NOBO ® , Franken ® , Derwent ® , Marbig ® , Artline ® * and Spirax ® *Australia/N.Z. only Filing and organization products; workspace machines, tools and essentials; computer and gaming accessories; dry erase boards and accessories; and writing and art products. Each operating segment designs, markets, sources, manufactures and sells recognized consumer, technology and business branded products used in schools, homes and at work. Product designs are tailored to end-user preferences in each geographic region, and where possible, leverage common engineering, design and sourcing. Customers We distribute our products through a wide variety of channels to ensure that our products are readily and conveniently available for purchase by consumers and other end-users, wherever they prefer to shop. These channels include mass retailers, e-tailers, discount, drug/grocery and variety chains, warehouse clubs, hardware and specialty stores, independent office product dealers, office superstores, wholesalers, contract stationers and specialist technology businesses. We also sell directly through e-commerce sites and our direct sales organization. The operating results regularly provided to the CODM for our operating segments for the years ended December 31, 2024, 2023 and 2022 were as follows: Twelve Months Ended December 31, 2024 ACCO Brands Americas ACCO Brands International Total Net sales $ 999.9 $ 666.3 $ 1,666.2 Cost of products sold 666.0 444.8 1,110.8 Gross profit 333.9 221.5 555.4 Sales and marketing expenses (1) 115.2 91.5 206.7 Administrative expenses (2) 64.9 51.9 116.8 Restructuring 6.5 6.9 13.4 Impairment of goodwill and intangible assets 165.2 — 165.2 All other (3) 27.6 17.1 44.7 Segment operating (loss) income ( 45.5 ) 54.1 8.6 Corporate expense 45.6 Total consolidated operating loss ( 37.0 ) Interest expense (income), net 45.1 Non-operating pension expense 6.1 Other (income) expense, net ( 0.9 ) Loss before income tax $ ( 87.3 ) Twelve Months Ended December 31, 2023 ACCO Brands Americas ACCO Brands International Total Net Sales $ 1,135.7 $ 697.1 $ 1,832.8 Cost of products sold 761.7 472.8 1,234.5 Gross profit 374.0 224.3 598.3 Sales and marketing expenses (1) 123.7 94.2 217.9 Administrative expenses (2) 75.2 52.3 127.5 Restructuring 16.7 9.9 26.6 Impairment of goodwill and intangible assets 89.5 — 89.5 All other (3) 25.0 18.3 43.3 Segment operating income 43.9 49.6 93.5 Corporate expense 48.8 Total consolidated operating income 44.7 Interest expense (income), net 51.5 Non-operating pension expense 1.8 Other expense (income), net 4.5 Loss before income tax $ ( 13.1 ) Twelve Months Ended December 31, 2022 ACCO Brands Americas ACCO Brands International Total Net Sales $ 1,200.4 $ 747.2 $ 1,947.6 Cost of products sold 845.9 549.4 1,395.3 Gross profit 354.5 197.8 552.3 Sales and marketing expenses (1) 132.0 90.1 222.1 Administrative expenses (2) 64.2 49.4 113.6 Restructuring 6.0 3.4 9.4 Impairment of goodwill and intangible assets 98.7 — 98.7 All other (3) 24.9 16.3 41.2 Segment operating income 28.7 38.6 67.3 Corporate expense 32.5 Total consolidated operating income 34.8 Interest expense (income), net 37.3 Non-operating pension income ( 4.5 ) Other (income) expense, net ( 12.9 ) Income before income tax $ 14.9 (1) Sales and Marketing consists primarily of advertising, marketing, selling, customer service expenses and research and development. (2) Admin expense consists primarily of executive, finance, information technology and human resources expenses. (3) All other expense primarily consists of amortization and, for 2022, changes in the fair value of contingent earnout. The following table presents the measure of operating segment assets used by the Company’s CODM as of December 31, 2024 and 2023: (in millions) 2024 2023 ACCO Brands Americas $ 418.0 $ 533.5 ACCO Brands International 201.3 224.7 Total segment assets (4) 619.3 758.2 Goodwill 446.4 590.0 Identifiable intangibles, net 709.6 815.7 Property, plant and equipment, net 137.5 170.1 Unallocated assets (5) 315.6 310.8 Total assets $ 2,228.4 $ 2,644.8 (4) Segment assets represent assets that are regularly provided to the CODM and consist of accounts receivable less allowances and inventory. (5) Unallocated assets consist primarily of cash, deferred taxes, derivatives, prepaid pension assets, prepaid debt issuance costs and right of use asset, leases. Capital spend by operating segment for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 ACCO Brands Americas $ 10.2 $ 7.7 $ 11.7 ACCO Brands International 6.8 7.6 6.0 Total capital spend $ 17.0 $ 15.3 $ 17.7 Depreciation expense by operating segment for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 ACCO Brands Americas $ 19.2 $ 20.4 $ 23.8 ACCO Brands International 9.2 12.3 14.1 Total depreciation $ 28.4 $ 32.7 $ 37.9 Property, plant and equipment, net by operating segment as of December 31, 2024 and 2023 was as follows: (in millions) 2024 2023 U.S. $ 51.1 $ 68.2 Canada 0.9 1.5 Latin America 22.7 29.1 ACCO Brands Americas 74.7 98.8 ACCO Brands EMEA 53.5 60.9 Australia/N.Z. 8.7 9.5 Asia-Pacific 0.6 0.9 ACCO Brands International 62.8 71.3 Property, plant and equipment, net $ 137.5 $ 170.1 Top Customers Net sales to our five largest customers totaled $ 532.9 million , $ 609.0 million and $ 663.3 million for the years ended December 31, 2024, 2023 and 2022 , respectively. No customer exceeded 10 percent of net sales for the years ended December 31, 2024, 2023 and 2022. As of December 31, 2024 and 2023, our top five trade accounts receivable totaled $ 116.3 million and $ 138.1 million , respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	18 . Commitments and Contingencies Pending Litigation - Brazil Tax Assessments In connection with our May 1, 2012 acquisition of the Mead C&OP business, we assumed all of the tax liabilities for the acquired foreign operations including ACCO Brazil. For further information, see "Note 11. Income Taxes - Brazil Tax Assessments " for details on tax assessments issued by the FRD against ACCO Brazil challenging the tax deduction of goodwill from ACCO Brazil's taxable income for the years 2007 through 2010. If the FRD's initial position is ultimately sustained, payment of the amount assessed would materially and adversely affect our cash flow in the year of settlement. Brazil Tax Credits In May 2021, the Supreme Court of Brazil issued its final ruling in a leading case related to the computation of certain indirect taxes which provides that the indirect tax base should not include the gross amount of the value-added tax known as "ICMS." The Supreme Court further ruled that taxpayers can recognize future operating credits ("Tax Credits") for excess indirect tax payments from past periods due to the inclusion of ICMS in the indirect tax base to the extent the taxpayer had filed judicial challenges seeking to recover excess tax payments prior to March 15, 2017 and for any excess tax payments made after March 15, 2017. ACCO Brazil filed legal actions requesting recovery of these excess tax payments by way of future Tax Credits covering various time periods prior to March 15, 2017. All of these cases have been finally decided in a court of law in favor of ACCO Brazil. In the first quarter of 2024, ACCO Brazil completed the necessary administrative steps which allowed it to benefit from additional Tax Credits. As of December 31, 2024, 2023 and 2022 we record a gain of $ 1.9 million, $ 1.3 million and $ 11.1 million, respectively, which is included in "Other (income) expense, net," on our Consolidated Statements of Loss. The Tax Credits will be utilized against future tax obligations. Indústria Gráfica Foroni Ltda. ("Foroni"), in years prior to its acquisition by ACCO Brazil, also filed a legal action in Brazil to recover these excess indirect tax payments and this legal action has been finalized. Upon the expiration of the application status of limitations, we are required under agreements with the former owners of the Foroni business to remit certain recovered tax credits, less the applicable tax and expenses, to the extent the tax credits relate to a tax period prior to the acquisition date. In September of 2021, the Supreme Court of Brazil issued its final ruling in a leading case which provides that corporate income tax (“IRPJ”) and social contribution on net income (“CSLL”) should not be levied on the Special System of Clearance and Custody (“SELIC”) interest rate received by taxpayers on the refund of overpaid taxes as in our Tax Credits. During the twelve months ended December 31, 2024 , ACCO Brazil filed legal actions requesting recovery of these excess tax payments and completed the necessary administrative steps which allowed it to record an income tax benefit of $ 2.6 million. Other Pending Litigation We are party to various lawsuits and regulatory proceedings, primarily related to alleged patent infringement, as well as other claims incidental to our business. In addition, we may be unaware of third-party claims of intellectual property infringement relating to our technology, brands, or products, and we may face other claims related to business operations. Any litigation regarding patents or other intellectual property could be costly and time-consuming and might require us to pay monetary damages or enter into costly license agreements. We also may be subject to injunctions against development and sale of certain of our products. It is the opinion of management that (other than the Brazil Tax Assessments) the ultimate resolution of currently outstanding matters will not have a material adverse effect on our financial condition, results of operations or cash flow. However, there is no assurance that we will ultimately be successful in our defense of any of these matters or that an adverse outcome in any matter will not affect our results of operations, financial condition or cash flow. Further, future claims, lawsuits and legal proceedings could materially and adversely affect our business, reputation, results of operations and financial condition. Unconditional Purchase Commitments Future minimum payments under unconditional purchase commitments, primarily for inventory purchase commitments as of December 31, 2024 were as follows: (in millions) 2025 $ 113.3 2026 4.2 2027 1.3 2028 and thereafter — Total unconditional purchase commitments $ 118.8

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts and Reserves	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts and Reserves	Allowances for Doubtful Accounts Changes in the allowances for doubtful accounts were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Balance at beginning of year $ 9.3 $ 9.1 $ 10.0 Additions charged to expense 0.7 1.3 0.5 Deductions - write offs ( 2.2 ) ( 1.6 ) ( 1.5 ) Foreign exchange changes ( 1.1 ) 0.5 0.1 Balance at end of year $ 6.7 $ 9.3 $ 9.1 Allowances for Sales Discounts and Other Credits Changes in the allowances for sales discounts and returns were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Balance at beginning of year $ 11.6 $ 15.6 $ 15.2 Additions charged to expense 5.2 8.1 15.7 Deductions ( 8.8 ) ( 11.8 ) ( 13.8 ) Foreign exchange changes ( 0.1 ) ( 0.3 ) ( 1.5 ) Balance at end of year $ 7.9 $ 11.6 $ 15.6 Allowances for Cash Discounts Changes in the allowances for cash discounts were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Balance at beginning of year $ 2.0 $ 1.9 $ 2.4 Additions charged to expense 18.4 20.7 22.9 Deductions - discounts taken ( 18.7 ) ( 20.7 ) ( 23.3 ) Foreign exchange changes ( 0.1 ) 0.1 ( 0.1 ) Balance at end of year $ 1.6 $ 2.0 $ 1.9 Warranty Reserves Changes in the reserve for warranty claims were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Balance at beginning of year $ 6.0 $ 6.4 $ 5.7 Provision for warranties issued 2.8 3.8 5.3 Deductions - settlements made (in cash or in kind) ( 3.6 ) ( 4.5 ) ( 4.3 ) Foreign exchange changes ( 0.3 ) 0.3 ( 0.3 ) Balance at end of year $ 4.9 $ 6.0 $ 6.4 Income Tax Valuation Allowance Changes in the deferred tax valuation allowances were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Balance at beginning of year $ 59.2 $ 51.9 $ 52.4 Net increase to valuation allowance - expense 2.4 5.4 3.2 Foreign exchange changes ( 1.3 ) 1.9 ( 3.7 ) Balance at end of year $ 60.3 $ 59.2 $ 51.9 Valuation and qualifying accounts and reserves fluctuate with company operating performance.

Significant Accounting Polici_2

Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Consolidation policy	The consolidated financial statements include the accounts of ACCO Brands Corporation and its domestic and international subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates Our financial statements are prepared in conformity with generally accepted accounting principles in the U.S. ("GAAP"). Preparation of our financial statements requires us to make judgments, estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses presented for each reporting period in the financial statements and the related accompanying notes. Actual results could differ significantly from those estimates. We regularly review our assumptions and estimates, which are based on historical experience and, where appropriate, current business trends.
Cash and Cash Equivalents	Cash and Cash Equivalents Highly liquid investments with an original maturity of three months or less are included in cash and cash equivalents.
Accounts Receivable and Allowances for Sales/Pricing/Cash Discounts and Doubtful Accounts	Accounts Receivable and Allowances for Sales/Pricing/Cash Discounts and Doubtful Accounts Trade receivables are recorded at the stated amount, less allowances for sales/pricing/cash discounts and doubtful accounts. The allowance for sales/pricing/cash discounts represents estimated uncollectible receivables associated with the products previously sold to customers and is recorded at the same time that the sales are recognized. The allowance is based on historical trends. The allowance for doubtful accounts represents estimated uncollectible receivables associated with potential customer defaults on contractual obligations, usually due to a customer's potential insolvency. The allowance includes amounts for certain customers where a risk of default has been specifically identified. In addition, the allowance includes a provision for customer defaults on a general formulaic basis when it is determined the risk of some default is probable and estimable but cannot yet be associated with a specific customer. The assessment of the likelihood of customer defaults is based on various factors, including the length of time the receivables are past due, historical experience and existing economic conditions. The allowances are recorded as reductions to "Net sales" and "Accounts receivable, net."
Inventories	Inventories Inventories are priced at the lower of cost (principally first-in, first-out) or net realizable value. When necessary, the write-down of inventory to its net realizable value is recorded for obsolete or slow-moving inventory based on assumptions about future demand and marketability of products, the impact of new product introductions and specific identification of items, such as product discontinuance or engineering/material changes. These estimates could vary significantly, either favorably or unfavorably, from actual requirements if future economic conditions, customer inventory levels or competitive conditions differ from our expectations.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are carried at cost less accumulated depreciation, and depreciated principally on a straight-line basis, over the estimated useful lives of the assets. Gains or losses resulting from dispositions are included in operating income. Betterments and renewals, which improve and extend the life of an asset are capitalized; maintenance and repair costs are expensed. Purchased computer software is capitalized and amortized over the software’s useful life. The following table shows estimated useful lives of property, plant and equipment: Property, plant and equipment Useful Life Buildings 40 to 50 years Leasehold improvements Lesser of lease term or the life of the asset Machinery, equipment and furniture 3 to 10 years Computer software 5 to 10 years We capitalize interest for major capital projects. Capitalized interest is added to the cost of the underlying assets and is depreciated over the useful lives of those assets. We did no t capitalize any interest for the years ended December 31, 2024, 2023 and 2022 .
Long-Lived Assets	Long-Lived Assets We test long-lived assets for impairment whenever events or changes in circumstances indicate that the assets’ carrying amount may not be recoverable from its undiscounted future cash flow. When such events occur, we compare the sum of the undiscounted cash flow expected to result from the use and eventual disposition of the asset or asset group to the carrying amount of a long-lived asset or asset group. The cash flows are based on our best estimate at the time of future cash flow, derived from the most recent business projections. If this comparison indicates that there is an impairment, the amount of the impairment is typically calculated using discounted expected future cash flow. The discount rate applied to these cash flows is based on our weighted average cost of capital, computed by selecting market rates at the valuation dates for debt and equity that are reflective of the risks associated with an investment in our industry as estimated by using comparable publicly traded companies.
Identifiable Intangible Assets	Identifiable Intangible Assets Identifiable intangible assets are comprised primarily of indefinite-lived and amortizable intangible assets acquired and arising from the application of purchase accounting. Indefinite-lived intangible assets are not amortized but are evaluated at least annually to determine whether the indefinite useful life is appropriate. Our ACCO ® trade name has been assigned an indefinite life as we currently anticipate that this trade name will contribute cash flows to ACCO Brands indefinitely. Amortizable intangible assets are amortized over their useful lives of 5 , 7 , 10 , 15 , 23 or 30 years. We test indefinite-lived intangibles for impairment annually, during the second quarter, and during any interim period when market or business events indicate there may be a potential adverse impact on a particular intangible. The test may be on a qualitative or quantitative basis as allowed by GAAP. We consider the implications of both external factors (e.g., market growth, pricing, competition, and technology) and internal factors (e.g., product costs, margins, support expenses, and capital investment) and their potential impact on cash flows in both the near and long term, as well as their impact on any identifiable intangible asset associated with the business. Based on recent business results, consideration of significant external and internal factors, and the resulting business projections, indefinite-lived intangible assets are reviewed to determine whether they are likely to remain indefinite-lived, or whether a finite life is more appropriate. In addition, based on events in the period and future expectations, management considers whether the potential for impairment exists. As of June 1, 2024, we changed our Five Star ® and Swingline ® indefinite-lived trade names to amortizable intangible assets as they no longer met the indefinite-lived criteria. We began amortizing both trade names on a straight-line basis over a life of 30 years as of June 1, 2024.
Goodwill	Goodwill Goodwill has been recorded on our balance sheet and represents the excess of the cost of an acquisition when compared with the fair value of the net assets acquired. The authoritative guidance on goodwill and other intangible assets requires that goodwill be tested for impairment at a reporting unit level. We have determined that our reporting units are ACCO Brands Americas and ACCO Brands International. We test goodwill for impairment at least annually, during the second quarter, or any interim period when market or business events indicate there may be a potential adverse impact on goodwill. As permitted by GAAP, we may perform a qualitative assessment to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a quantitative goodwill impairment test as required by GAAP. Estimating the fair value of each reporting unit requires us to make assumptions and estimates regarding our future. We utilized a combination of discounted cash flows and market approach. The financial projections used in the valuation models reflected management's assumptions regarding revenue growth rates, economic and market trends, cost structure, discount rate and other expectations about the anticipated short-term and long-term operating results for each of our reporting units. We believe the assumptions used in our goodwill impairment analysis are appropriate and result in reasonable estimates of the implied fair value of each reporting unit. However, given the economic environment and other uncertainties that can negatively impact on our business, there can be no assurance that our estimates and assumptions, made for purposes of our goodwill impairment testing, will prove to be an accurate prediction of the future. If our assumptions regarding future performance are not achieved, or if future events occur that adversely affect our enterprise value, we may be required to record additional goodwill impairment charges in future periods.
Employee Benefit Plans	Employee Benefit Plans We provide a range of benefits to our employees and retired employees, including pension, post-retirement, post-employment and health care benefits. We record annual amounts relating to these plans based on calculations specified by GAAP, which include various actuarial assumptions, including discount rates, assumed rates of return, mortality rate tables, compensation increases, turnover rates and health care cost trends. Actuarial assumptions are reviewed on an annual basis and modifications to these assumptions are made based on current rates and trends when it is deemed appropriate. As required by GAAP, the effect of our modifications and unrecognized actuarial gains and losses are generally recorded to a separate component of accumulated other comprehensive income (loss) ("AOCI") in stockholders’ equity and amortized over future periods.
Income Taxes	Income Taxes Deferred tax liabilities or assets are established for temporary differences between financial and tax reporting basis and are subsequently adjusted to reflect changes in tax rates expected to be in effect when the temporary differences reverse. A valuation allowance is recorded to reduce deferred tax assets to an amount that is more likely than not to be realized. Facts and circumstances may change and cause us to revise our conclusions regarding our ability to realize certain net operating losses and other deferred tax attributes. The amount of income taxes that we pay is subject to ongoing audits by federal, state and foreign tax authorities. Our estimate of the potential outcome of any uncertain tax position is subject to management’s assessment of relevant risks, facts and circumstances existing at that time. We believe that we have adequately provided for reasonably foreseeable outcomes related to these matters. However, our future results may include favorable or unfavorable adjustments to our estimated tax liabilities in the period any assessments are received, revised or resolved. As of December 31, 2024, the Company has recorded $ 4.1 million of deferred taxes on approximately $ 330.7 million of unremitted earnings of non-U.S. subsidiaries that may be remitted to the U.S. The Company has approximately $ 319.5 million of additional unremitted earnings of non-U.S. subsidiaries, which are indefinitely reinvested and for which no deferred taxes have been provided.
Revenue Recognition	Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to our customers in an amount reflective of the consideration we expect to receive in exchange for those goods or services. Taxes we collect concurrent with revenue producing activities are excluded from revenue. Incidental items incurred that are immaterial in the context of the contract are expensed. At the inception of each contract, the Company assesses the products and services promised and identifies each distinct performance obligation. To identify the performance obligations, the Company considers all products and services promised regardless of whether they are explicitly stated or implied within the contract or by standard business practices. Products : For our products, we transfer control and recognize a sale primarily when we either ship the product from our manufacturing facility or distribution center, or upon delivery to a customer-specified location depending upon the terms in the customer agreement. In addition, we recognize revenue for private label products as the product is manufactured (or over time) when a contract has an enforceable right to payment. For consignment arrangements, revenue is not recognized until the products are sold to the end customer. Customer Program Costs : Customer programs and incentives ("Customer Program Costs") are a common practice in our industry. We incur Customer Program Costs to obtain favorable product placement, to promote sell-through of products and to maintain competitive pricing. The amount of consideration we receive and revenue we recognize is impacted by Customer Program Costs, including sales rebates; in-store promotional allowances; shared media and customer catalog allowances; other cooperative advertising arrangements; freight allowance programs offered to our customers; and allowances for discounts. We recognize Customer Program Costs, primarily as a deduction to gross sales, at the time that the associated revenue is recognized. Customer Program Costs are based on management's best estimates using the most likely amount method and is an amount that is probable of not being reversed. In the absence of a signed contract, estimates are based on historical or projected experience for each program type or customer. We adjust our estimate of revenue when the most likely amount of consideration we expect to receive changes. Service or Extended Maintenance Agreements ("EMAs"): Depending on the terms of the EMA, we may defer recognition of the consideration received for any unsatisfied obligations. We use an observable price to determine the stand-alone selling price for separate performance obligations or an estimated cost plus margin approach, for our separately priced service/maintenance agreements that extend mechanical and maintenance coverage beyond our base warranty coverage to our Print Finishing Solutions customers. These agreements range in duration from three to sixty month s, however, most agreements are one year or less. We generally receive payment at inception of the EMAs and recognize revenue over the term of the agreement on a straight-line basis. Shipping and Handling : Freight and distribution activities performed before the customer obtains control of the goods are not considered promised services under customer contracts and therefore are not distinct performance obligations. The Company has chosen to account for shipping and handling activities as a fulfillment activity, and therefore accrues the expense of freight and distribution in "Cost of products sold" when products are shipped. We reflect all amounts billed to customers for shipping and handling in net sales and the costs we incurred for shipping and handling (including costs to ship and move product from the seller’s place of business to the buyer’s place of business, as well as costs to store, move and prepare products for shipment) in cost of products sold. Reserve for Sales Returns: The reserve for sales returns represents estimated uncollectible receivables associated with the potential return of products previously sold to customers and is recorded at the same time that the sales are recognized. The reserve includes a general provision for product returns based on historical trends. In addition, the reserve includes amounts for currently authorized customer returns that are considered to be abnormal in comparison to the historical trends. We record the returns reserve, on a gross basis, as a reduction to "Net sales" and "Cost of products sold" with increases to "Other current liabilities" and "Inventories."
Cost of Products Sold	Cost of Products Sold Cost of products sold includes all manufacturing, product sourcing and distribution costs, including depreciation related to assets used in the manufacturing, procurement and distribution process, allocation of certain information technology costs supporting those processes, inbound and outbound freight, shipping and handling costs, purchasing costs associated with materials and packaging used in the production processes and inventory valuation adjustments.
Selling, General and Administrative Expenses	Selling, General and Administrative Expenses Selling, general and administrative expenses ("SG&A") include advertising, marketing, and selling (including commissions) expenses, research and development, customer service, depreciation related to assets outside the manufacturing and distribution processes and all other general and administrative expenses outside the manufacturing and distribution functions (e.g., finance, human resources, information technology, legal and other corporate expenses).
Advertising Expenses	Advertising Expenses Advertising expenses were $ 99.3 million , $ 102.7 million and $ 108.8 million for the years ended December 31, 2024, 2023 and 2022, respectively. These costs primarily include, but are not limited to, cooperative advertising and promotional allowances as described in " Customer Program Costs " above and are principally expensed as incurred.
Warranty Reserves	Warranty Reserves We offer our customers various warranty terms based on the type of product that is sold. Estimated future obligations related to products sold under these warranty terms are provided by charges to cost of products sold in the same period in which the related revenue is recognized.
Research and Development Expenses	Research and Development Expenses Research and development expenses were $ 23.0 million , $ 25.8 million and $ 26.3 million for the years ended December 31, 2024, 2023 and 2022 , respectively, are classified as SG&A expenses and are charged to expense as incurred.
Stock-Based Compensation	Stock-Based Compensation Our primary types of stock-based compensation provided for under our current incentive plan consist of stock options, restricted stock unit awards and performance stock unit awards. Stock-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense over the requisite service period. Where awards are made with non-substantive vesting periods (for example, where a portion of the award vests due to retirement eligibility), we estimate and recognize expense based on the period from the grant date to the date on which the employee is retirement eligible. The Company accounts for forfeitures as they occur.
Foreign Currency Translation	Foreign Currency Translation Foreign currency balance sheet accounts are translated into U.S. dollars at the rates of exchange at the balance sheet date. Income and expenses are translated at the average rates of exchange in effect during the period. The related translation adjustments are made directly to a separate component of AOCI in stockholders’ equity. Some transactions are made in currencies different from an entity’s functional currency; gains and losses on these foreign currency transactions are included in the income statement.
Derivatives Financial Instruments	Derivative Financial Instruments We recognize all derivatives as either assets or liabilities on the balance sheet and record those instruments at fair value. If the derivative is designated as a fair value hedge and is effective, the changes in the fair value of the derivative and of the hedged item attributable to the hedged risk are recognized in earnings in the same period. If the derivative is designated as a cash flow hedge, the effective portions of changes in the fair value of the derivative are recorded in AOCI and are recognized in the Consolidated Statements of Income when the hedged item affects earnings. Ineffective portions of changes in the fair value of cash flow hedges are recognized in earnings. Certain forecasted transactions, and assets and liabilities are exposed to foreign currency risk. We continually monitor our foreign currency exposures in order to maximize the overall effectiveness of our foreign currency hedge positions. Principal currencies hedged against the U.S. dollar include the Euro, Australian dollar, Canadian dollar, Swedish krona, British pound and Japanese yen.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In November 2024, the Financial Accounting Standards Board ("FASB") issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures, (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires a public entity to disaggregate certain expense captions into specified categories in disclosures within the footnotes to the financial statements. This ASU is effective for annual periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027, with early adoption permitted. We are evaluating the effect this guidance will have on the notes to our consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which enhances the income tax disclosures to provide information to better assess how an entity’s operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. This ASU is effective for annual periods beginning after December 15, 2024, with early adoption permitted. We are evaluating the effect this guidance will have on our tax disclosures. There were no other recently issued accounting standards that are expected to have an impact on the Company’s financial condition, results of operations or cash flow. Recently Adopted Accounting Standards In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires a public entity to disclose significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. The ASU does not change how a public entity identifies its operating segments, aggregates them, or applies the quantitative thresholds to determine its reportable segments. Effective in the fourth quarter of 2024, the Company adopted this standard. See "Note 17. Information on Operating Segments" for further details. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides optional expedients and exceptions for applying current GAAP to contracts, hedging relationships, and other transactions affected by the transition from the use of LIBOR to an alternative reference rate. Effective in the fourth quarter of 2022, the Company adopted this standard. The adoption of this standard did not have a material impact on our consolidated financial statements. There were no other accounting standards that were adopted in 2024, 2023 and 2022 that had a material effect on the Company’s financial condition, results of operations or cash flow.
Leases	The Company determines if an arrangement is a lease at inception. Leases are included in "Right of use asset, leases" ("ROU Assets"), and the current portion of the lease liability is included in "Lease liabilities" and the non-current portion is included in "Long-term lease liabilities" in the Consolidated Balance Sheets. The Company currently has an immaterial amount of financing leases and leases with terms of more than one month and less than 12 months. ROU Assets and Lease liabilities are recognized based on the present value of lease payments over the lease term. In determining the present value of leases, the Company uses its incremental collateralized borrowing rate, on a regional basis, due to the implicit rate of return is generally not readily determinable for our leases. The incremental borrowing rate is dependent upon the duration of the lease and has been segmented into three groups of time. All leases within the same region and the same group of time share the same incremental borrowing rate. The Company has lease agreements with lease and non-lease components, which are combined for accounting purposes for all classes of underlying assets except information technology equipment.

Significant Accounting Polici_3

Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards (Tables)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Property, Plant and Equipment, Net	The following table shows estimated useful lives of property, plant and equipment: Property, plant and equipment Useful Life Buildings 40 to 50 years Leasehold improvements Lesser of lease term or the life of the asset Machinery, equipment and furniture 3 to 10 years Computer software 5 to 10 years The components of net property, plant and equipment were as follows: December 31 (in millions) 2024 2023 Land and improvements $ 17.4 $ 20.9 Buildings and improvements to leaseholds 115.4 130.7 Machinery and equipment 365.2 442.9 Construction in progress 7.5 5.1 505.5 599.6 Less: accumulated depreciation ( 368.0 ) ( 429.5 ) Net property, plant and equipment (1) $ 137.5 $ 170.1 (1) Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

Long-term Debt and Short-term_2

Long-term Debt and Short-term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Summary of Notes Payable and Long-Term Debt	Notes payable and long-term debt, listed in order of the priority of security interests in assets of the Company, consisted of the following as of December 31, 2024 and 2023: (in millions) December 31, December 31, Euro Senior Secured Term Loan A, due October 2029 (floating interest rate of 4.68 % at December 31, 2024 and 5.93 % at December 31, 2023) $ 127.9 $ 218.2 USD Senior Secured Term Loan A (floating interest rate of 7.50 % at December 31, 2023) — 78.0 Australian Dollar Senior Secured Term Loan A (floating interest rate of 6.42 % at December 31, 2023) — 32.5 Euro Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 4.68 % at December 31, 2024) 59.1 — U.S. Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.47 % at December 31, 2024 and 7.40 % at December 31, 2023) 34.4 7.3 Australian Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.44 % at December 31, 2024 and 6.42 % at December 31, 2023) 32.8 14.3 Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25 %) 575.0 575.0 Other borrowings 10.5 0.3 Total debt 839.7 925.6 Less: Current portion 51.3 36.7 Debt issuance costs, unamortized 5.1 6.7 Long-term debt, net $ 783.3 $ 882.2
Schedule of Applicable Rate and Undrawn Fee Based on Company's Consolidated Leverage Ratio	The current pricing for borrowings under the Credit Agreement is as follows: Consolidated Leverage Ratio Applicable Rate on Euro/AUD/CDN Dollar Loans Applicable Rate on Base Rate Loans Undrawn Fee > 4.25 2.25 % 1.25 % 0.375 % > 3.5 2.00 % 1.00 % 0.350 % > 2.5 1.75 % 0.75 % 0.300 % ≤ 2.5 1.50 % 0.50 % 0.250 %

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Components of Lease Expense and Other Information	The components of lease expense for the years ended December 31, 2024, 2023 and 2022, were as follows: (in millions) 2024 2023 2022 Operating lease cost $ 29.0 $ 28.6 $ 29.5 Sublease income ( 3.1 ) ( 2.5 ) ( 2.4 ) Total lease cost $ 25.9 $ 26.1 $ 27.1 Other information related to leases for the years ended December 31, 2024 and 2023 was as follows: Twelve Months Ended (in millions, except lease term and discount rate) 2024 2023 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 27.9 $ 29.8 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 19.5 $ 23.2 Weighted average remaining lease term: Operating leases 5.6 years Weighted average discount rate: Operating leases 5.3 %
Schedule of Future Minimum Lease Payments, Net of Sublease Income	Future minimum lease payments, net of sub-lease income, for all non-cancelable leases as of December 31, 2024 were as follows: (in millions) Operating 2025 26.2 2026 21.4 2027 16.6 2028 13.6 2029 10.6 Thereafter 17.8 Total minimum lease payments 106.2 Less imputed interest 17.8 Future minimum payments for leases, net of sublease rental income and imputed interest $ 88.4

Pension and Other Retiree Ben_2

Pension and Other Retiree Benefits (Tables)	12 Months Ended
	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Schedule of Amounts Recognized in Balance Sheet Net Funded Status	The following table sets forth our defined benefit pension and post-retirement plans funded status and the amounts recognized in our Consolidated Balance Sheets: Pension Post-retirement U.S. International (in millions) 2024 2023 2024 2023 2024 2023 Change in projected benefit obligation (PBO) Projected benefit obligation at beginning of year $ 162.6 $ 162.3 $ 467.4 $ 441.1 $ 3.3 $ 3.2 Service cost — — 0.6 0.5 — — Interest cost 7.7 7.9 18.5 20.0 0.2 0.2 Actuarial (gain) loss ( 9.1 ) 3.2 ( 34.4 ) 14.6 0.5 0.1 Participants’ contributions — — 0.1 0.1 — — Benefits paid ( 10.7 ) ( 10.8 ) ( 27.7 ) ( 27.0 ) ( 0.3 ) ( 0.3 ) Settlement — — ( 15.1 ) ( 3.9 ) — — Foreign exchange rate changes — — ( 12.9 ) 22.0 ( 0.1 ) 0.1 Projected benefit obligation at end of year 150.5 162.6 396.5 467.4 3.6 3.3 Change in plan assets Fair value of plan assets at beginning of year 145.5 140.2 324.9 306.4 — — Actual return on plan assets 7.6 13.6 ( 8.4 ) 18.9 — — Employer contributions 3.0 2.5 14.5 14.1 0.3 0.3 Participants’ contributions — — 0.1 0.1 — — Benefits paid ( 10.7 ) ( 10.8 ) ( 27.7 ) ( 27.0 ) ( 0.3 ) ( 0.3 ) Settlement — — ( 15.1 ) ( 4.0 ) — — Foreign exchange rate changes — — ( 5.4 ) 16.4 — — Fair value of plan assets at end of year 145.4 145.5 282.9 324.9 — — Funded status (Fair value of plan assets less PBO) $ ( 5.1 ) $ ( 17.1 ) $ ( 113.6 ) $ ( 142.5 ) $ ( 3.6 ) $ ( 3.3 ) Amounts recognized in the Consolidated Balance Sheets consist of: Other non-current assets $ — $ — $ 2.5 $ 2.5 $ — $ — Other current liabilities — — 7.2 7.5 0.4 0.3 Pension and post-retirement benefit obligations 5.1 17.1 108.9 137.5 3.2 3.0 Components of accumulated other comprehensive income (loss), net of tax: Unrecognized actuarial loss (gain) 84.4 90.7 121.9 139.9 ( 2.6 ) ( 3.6 ) Unrecognized prior service cost — — 4.9 5.2 — —
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	The following table sets out information for pension plans with an accumulated benefit obligation in excess of plan assets: U.S. International (in millions) 2024 2023 2024 2023 Accumulated benefit obligation (1) $ 150.5 $ 162.6 $ 116.8 $ 437.4 Fair value of plan assets 145.4 145.5 4.0 297.2 (1) The decrease in 2024 under International as compared to 2023 is the result of the ACCO U.K. plan ABO no longer being in excess of plan assets as of December 31, 2024, unlike the prior year.
Schedule of Defined Benefit Plan, Plan with Projected Benefit Obligations in Excess of Plan Assets	The following table sets out information for pension plans with a projected benefit obligation in excess of plan assets: U.S. International (in millions) 2024 2023 2024 2023 Projected benefit obligation $ 150.5 $ 162.6 $ 385.1 $ 442.1 Fair value of plan assets 145.4 145.5 268.9 297.2
Components of Net Periodic Benefit (Income) Expense for Pension and Post-Retirement Plans	The components of net periodic benefit (income) cost for pension and post-retirement plans for the years ended December 31, 2024, 2023 and 2022, were as follows: Year Ended December 31, Pension Post-retirement U.S. International (in millions) 2024 2023 2022 2024 2023 2022 2024 2023 2022 Service cost $ — $ — $ — $ 0.6 $ 0.5 $ 1.0 $ — $ — $ — Interest cost 7.7 7.9 4.9 18.5 20.0 9.6 0.2 0.2 0.1 Expected return on plan assets ( 12.9 ) ( 12.0 ) ( 10.9 ) ( 19.6 ) ( 21.5 ) ( 17.5 ) — — — Amortization of net loss (gain) 2.5 2.2 3.7 5.4 4.2 5.0 ( 0.6 ) ( 0.5 ) ( 0.5 ) Amortization of prior service cost — — — 0.3 0.3 0.3 — — — Special termination benefit (2) — — — — — 0.8 — — — Settlement (3) — — — 4.6 1.2 — — — — Net periodic benefit (income) cost (4) $ ( 2.7 ) $ ( 1.9 ) $ ( 2.3 ) $ 9.8 $ 4.7 $ ( 0.8 ) $ ( 0.4 ) $ ( 0.3 ) $ ( 0.4 ) (2) Special termination benefit of $ 0.8 million due to the plan wind-up of our Canadian Salaried and Hourly pension plans effective July 1, 2022. (3) Settlement amounts of $ 4.6 million in 2024 and $ 1.2 million in 2023 are primarily related to the wind-up of our Canadian Salaried and Hourly pension plans. (4) The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense (income)" in the Consolidated Statements of Loss .
Schedule of Defined Benefit Plan Amounts Recognized in Accumulated Other Comprehensive Income (Loss)	Other changes in plan assets and benefit obligations that were recognized in accumulated other comprehensive income (loss) during the years ended December 31, 2024, 2023 and 2022 were as follows: Pension Post-retirement U.S. International (in millions) 2024 2023 2022 2024 2023 2022 2024 2023 2022 Current year actuarial (gain) loss $ ( 3.8 ) $ 1.6 $ ( 1.0 ) $ ( 6.5 ) $ 17.2 $ ( 23.9 ) $ 0.5 $ 0.1 $ ( 0.6 ) Amortization of actuarial (loss) gain ( 2.5 ) ( 2.2 ) ( 3.7 ) ( 9.9 ) ( 5.2 ) ( 5.1 ) 0.5 0.5 0.5 Amortization of prior service cost — — — ( 0.3 ) ( 0.3 ) ( 0.3 ) — — — Foreign exchange rate changes — — — ( 1.7 ) 7.5 ( 21.5 ) 0.1 ( 0.1 ) 0.2 Total recognized in other comprehensive (loss) income ( 6.3 ) ( 0.6 ) ( 4.7 ) ( 18.4 ) 19.2 ( 50.8 ) 1.1 0.5 0.1 Total recognized in net periodic benefit (income) cost and other comprehensive (loss) income $ ( 9.0 ) $ ( 2.5 ) $ ( 7.0 ) $ ( 8.6 ) $ 23.9 $ ( 51.6 ) $ 0.7 $ 0.2 $ ( 0.3 )
Schedule of Assumptions Used	The weighted average assumptions used to determine benefit obligations for the years ended December 31, 2024, 2023, and 2022 were as follows: Pension Post-retirement U.S. International 2024 2023 2022 2024 2023 2022 2024 2023 2022 Discount rate 5.7 % 5.0 % 5.1 % 4.8 % 4.2 % 4.5 % 5.2 % 4.8 % 3.8 % Rate of compensation increase N/A N/A N/A 3.0 % 2.9 % 3.0 % N/A N/A N/A The weighted average assumptions used to determine net periodic benefit (income) cost for the years ended December 31, 2024, 2023, and 2022 were as follows: Pension Post-retirement U.S. International 2024 2023 2022 2024 2023 2022 2024 2023 2022 Discount rate 5.0 % 5.1 % 2.9 % 4.2 % 4.5 % 1.8 % 4.8 % 5.0 % 2.4 % Expected long-term rate of return 8.0 % 7.5 % 6.5 % 6.2 % 6.9 % 4.0 % N/A N/A N/A Rate of compensation increase N/A N/A N/A 2.9 % 3.0 % 3.0 % N/A N/A N/A The weighted average health care cost trend rates used to determine post-retirement benefit obligations and net periodic benefit (income) cost as of December 31, 2024, 2023 and 2022 were as follows: Post-retirement 2024 2023 2022 Health care cost trend rate assumed for next year 10 % 9 % 6 % Rate that the cost trend rate is assumed to decline (the ultimate trend rate) 8 % 7 % 5 % Year that the rate reaches the ultimate trend rate 2031 2031 2030
Schedule of Allocation of Plan Assets	Our pension plan weighted average asset allocations as of December 31, 2024 and 2023 were as follows: 2024 2023 U.S. International U.S. International Asset category Equity securities 34 % 6 % 37 % 7 % Fixed income 59 % 59 % 57 % 63 % Real estate 4 % 2 % 4 % 3 % Other (5) 3 % 33 % 2 % 27 % Total 100 % 100 % 100 % 100 % (5) Multi-strategy hedge funds, commodity linked funds, private equity funds, and cash and cash equivalents for certain of our plans.
Schedule of Expected Benefit Payments	The following table presents estimated future benefit payments to participants for the next ten fiscal years: (in millions) Pension Benefits Post-retirement Benefits 2025 $ 40.2 $ 0.4 2026 39.0 0.4 2027 39.2 0.4 2028 40.0 0.4 2029 40.2 0.3 Years 2030 - 2034 208.3 1.5
Schedule of Multi-employer Plans	Details regarding the plan are outlined in the table below. EIN/Pension Plan Pension Protection Act Zone Status FIP/RP Status Pending Contributions Year Ended December 31, Surcharge Expiration Date of Collective-Bargaining Pension Fund Number 2024 2023 Implemented 2024 2023 2022 Imposed Agreement PACE Industry Union-Management Pension Fund 11-6166763 / 001 Red Red Implemented $ 0.1 $ 0.1 $ 0.1 Yes 6/30/2028
U.S.
Defined Benefit Plan Disclosure [Line Items]
Schedule of Allocation of Plan Assets	U.S. Pension Plan Assets The fair value measurements of our U.S. pension plan assets by asset category as of December 31, 2024 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2024 Mutual funds $ 110.9 $ — $ — $ 110.9 Exchange traded funds 33.1 — — 33.1 Common collective trust funds — 1.4 — 1.4 Total $ 144.0 $ 1.4 $ — $ 145.4 The fair value measurements of our U.S. pension plan assets by asset category as of December 31, 2023 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2023 Mutual funds $ 106.1 $ — $ — $ 106.1 Exchange traded funds 38.3 — — 38.3 Common collective trust funds — 1.1 — 1.1 Total $ 144.4 $ 1.1 $ — $ 145.5
International
Defined Benefit Plan Disclosure [Line Items]
Schedule of Allocation of Plan Assets	International Pension Plans Assets The fair value measurements of our international pension plans assets by asset category as of December 31, 2024 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2024 Cash and cash equivalents $ 3.1 $ — $ — $ 3.1 Equity securities 17.4 — — 17.4 Corporate debt securities — 62.0 — 62.0 Multi-strategy hedge funds — 33.7 — 33.7 Insurance contracts — 4.2 — 4.2 Real estate — 0.8 — 0.8 Government debt securities — 105.5 — 105.5 Investments measured at net asset value (6) Multi-strategy hedge funds 29.2 Real estate 4.3 Private equity 22.7 Total $ 20.5 $ 206.2 $ — $ 282.9 (6) Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in these tables are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the table that presents our defined benefit pension and post-retirement plans funded status. The fair value measurements of our international pension plans assets by asset category as of December 31, 2023 were as follows: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value as of (in millions) (Level 1) (Level 2) (Level 3) December 31, 2023 Cash and cash equivalents $ 6.4 $ — $ — $ 6.4 Equity securities 20.4 2.7 — 23.1 Corporate debt securities — 73.6 — 73.6 Multi-strategy hedge funds — 30.2 — 30.2 Insurance contracts — 4.1 — 4.1 Real estate — 3.7 — 3.7 Government debt securities — 131.3 — 131.3 Investments measured at net asset value (6) Multi-strategy hedge funds 24.7 Real estate 5.9 Private equity 21.9 Total $ 26.8 $ 245.6 $ — $ 324.9

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	The following table summarizes the impact of all stock-based compensation expense on our Consolidated Statements of Loss for the years ended December 31, 2024, 2023 and 2022: (in millions) 2024 2023 2022 Selling, general and administrative expense $ 11.9 $ 14.8 $ 9.5 (Loss) income before income tax ( 11.9 ) ( 14.8 ) ( 9.5 ) Income tax expense ( 2.9 ) ( 3.4 ) ( 2.2 ) Net loss $ ( 9.0 ) $ ( 11.4 ) $ ( 7.3 )
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan	Stock-based compensation expense by award type for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 Stock option compensation expense $ 0.5 $ 2.7 $ 3.7 RSU compensation expense 7.5 6.4 4.4 PSU compensation expense 3.9 5.7 1.4 Total stock-based compensation expense $ 11.9 $ 14.8 $ 9.5
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model and the weighted average assumptions as outlined in the following table: Year Ended December 31, 2022 Weighted average expected lives 6.0 years Weighted average risk-free interest rate 1.89 % Weighted average expected volatility 41.7 % Expected dividend yield 3.60 % Weighted average grant date fair value $ 2.43
Summary of Changes in Stock Options Outstanding	A summary of the changes in stock options outstanding under the Plan during the year ended December 31, 2024 is presented below: Number Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Outstanding at December 31, 2023 6,625,226 $ 9.26 Forfeited/Expired ( 913,930 ) $ 11.27 Outstanding at December 31, 2024 5,711,296 $ 8.94 4.7 years zero Exercisable shares at December 31, 2024 5,212,811 4.5 years zero
Summary of Changes in RSUs Outstanding	A summary of the changes in the RSUs outstanding under the Plan during 2024 is presented below: Stock Weighted Average Grant Date Fair Value Outstanding at December 31, 2023 3,444,450 $ 6.63 Granted 1,501,759 $ 5.31 Vested and distributed ( 253,634 ) $ 8.43 Vested and deferred distributed ( 133,273 ) $ 7.71 Forfeited and cancelled ( 317,413 ) $ 6.09 Outstanding at December 31, 2024 4,241,889 $ 6.06 Vested and deferred at December 31, 2024 (1) 767,216 $ 7.80 (1) Included in outstanding at December 31, 2024 . Vested and deferred RSUs are primarily related to deferred compensation for non-employee directors.
Summary of Changes in PSUs Outstanding	A summary of the changes in the PSUs outstanding under the Plan during 2024 is presented below: Stock Weighted Average Grant Date Fair Value Outstanding at December 31, 2023 1,771,690 $ 6.48 Granted 1,825,683 $ 5.80 Vested and distributed ( 685,998 ) $ 6.74 Forfeited and cancelled ( 319,295 ) $ 5.65 Other - increase due to performance of PSUs 954,162 $ 5.21 Outstanding at December 31, 2024 3,546,242 $ 5.81

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2024
Inventory Disclosure [Abstract]
Components of Inventories	The components of inventories were as follows: (in millions) 2024 2023 Raw materials $ 35.9 $ 50.1 Work in process 3.3 4.7 Finished goods 231.2 272.7 Total inventories $ 270.4 $ 327.5

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Net	The following table shows estimated useful lives of property, plant and equipment: Property, plant and equipment Useful Life Buildings 40 to 50 years Leasehold improvements Lesser of lease term or the life of the asset Machinery, equipment and furniture 3 to 10 years Computer software 5 to 10 years The components of net property, plant and equipment were as follows: December 31 (in millions) 2024 2023 Land and improvements $ 17.4 $ 20.9 Buildings and improvements to leaseholds 115.4 130.7 Machinery and equipment 365.2 442.9 Construction in progress 7.5 5.1 505.5 599.6 Less: accumulated depreciation ( 368.0 ) ( 429.5 ) Net property, plant and equipment (1) $ 137.5 $ 170.1 (1) Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

Goodwill and Identifiable Int_2

Goodwill and Identifiable Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Net Carrying Amount of Goodwill by Segment	Changes in the net carrying amount of goodwill by segment were as follows: (in millions) ACCO Brands Americas ACCO Brands International Total Balance at December 31, 2022 $ 472.2 $ 199.3 $ 671.5 Goodwill impairment ( 89.5 ) — ( 89.5 ) Foreign currency translation 0.9 7.1 8.0 Balance at December 31, 2023 $ 383.6 $ 206.4 $ 590.0 Goodwill impairment ( 127.5 ) — ( 127.5 ) Foreign currency translation ( 2.8 ) ( 13.3 ) ( 16.1 ) Balance at December 31, 2024 $ 253.3 $ 193.1 $ 446.4
Gross Carrying Value and Accumulated Amortization by Class of Identifiable Intangible Assets	The Company's gross carrying value and accumulated amortization by class of identifiable intangible assets as of December 31, 2024 and 2023 were as follows: December 31, 2024 December 31, 2023 (in millions) Gross Carrying Amounts Accumulated Amortization Net Book Value Gross Carrying Amounts Accumulated Amortization Net Book Value Indefinite-lived intangible assets: Trade names (1) (2) $ 101.2 $ ( 44.5 ) $ 56.7 $ 295.1 $ ( 44.5 ) $ 250.6 Amortizable intangible assets: Trade names (2) 627.5 ( 157.5 ) 470.0 497.1 ( 142.0 ) 355.1 Customer and contractual relationships 350.7 ( 230.0 ) 120.7 362.4 ( 221.3 ) 141.1 Vendor relationships 82.4 ( 22.2 ) 60.2 82.4 ( 16.7 ) 65.7 Patents 7.8 ( 5.8 ) 2.0 8.2 ( 5.0 ) 3.2 Subtotal 1,068.4 ( 415.5 ) 652.9 950.1 ( 385.0 ) 565.1 Total identifiable intangibles $ 1,169.6 $ ( 460.0 ) $ 709.6 $ 1,245.2 $ ( 429.5 ) $ 815.7 (1) Accumulated amortization prior to the adoption of authoritative guidance on goodwill and other intangible assets, at which time further amortization ceased. (2) Reflects the change of our Five Star ® and Swingline ® indefinite-lived trade names to amortizable intangible assets as of June 1, 2024.
Estimated Amortization Expense for Future Periods	Estimated amortization expense for amortizable intangible assets for the next five years is as follows: (in millions) 2025 2026 2027 2028 2029 Estimated amortization expense (3) $ 44.8 $ 42.8 $ 40.4 $ 38.3 $ 36.6 (3) Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization of intangible assets and other events.

Restructuring (Tables)

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
Summary of Activity in Restructuring Accounts	The summary of the activity in the restructuring liability for the year ended December 31, 2024 was as follows: (in millions) Balance at December 31, 2023 Provision Cash Expenditures Non-cash Items/Currency Change Balance at December 31, 2024 Employee termination costs (1) $ 27.5 $ 16.6 $ ( 17.0 ) $ ( 0.5 ) $ 26.6 Other 0.9 0.2 ( 1.1 ) — — Total restructuring liability $ 28.4 $ 16.8 $ ( 18.1 ) $ ( 0.5 ) $ 26.6 (1) We expect the remaining $ 26.6 million of employee termination costs to be substantially paid within the next twelve months . The summary of the activity in the restructuring accounts for the year ended December 31, 2023 was as follows: (in millions) Balance at December 31, 2022 Provision Cash Expenditures Non-cash Items/Currency Change Balance at December 31, 2023 Employee termination costs $ 8.7 $ 26.1 $ ( 7.6 ) $ 0.3 $ 27.5 Other — 1.1 ( 0.2 ) — 0.9 Total restructuring liability $ 8.7 $ 27.2 $ ( 7.8 ) $ 0.3 $ 28.4 The summary of the activity in the restructuring accounts for the year ended December 31, 2022 was as follows: (in millions) Balance at December 31, 2021 Provision Cash Expenditures Non-cash Items/Currency Change Balance at December 31, 2022 Employee termination costs $ 3.4 $ 9.4 $ ( 4.0 ) $ ( 0.1 ) $ 8.7 Termination of lease agreements 1.1 ( 0.2 ) ( 0.9 ) — — Other — 0.4 ( 0.4 ) — — Total restructuring liability $ 4.5 $ 9.6 $ ( 5.3 ) $ ( 0.1 ) $ 8.7 Restructuring charges for the years ended December 31, 2024, 2023 and 2022 by reporting segment were as follows: (in millions) 2024 2023 2022 ACCO Brands Americas $ 6.5 $ 16.7 $ 6.0 ACCO Brands International 6.9 9.9 3.4 Corporate 3.4 0.6 0.2 Total restructuring charges $ 16.8 $ 27.2 $ 9.6

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of (Loss) Income before Income Tax, Domestic and Foreign	The components of (loss) income before income tax for the years ended December 31, 2024, 2023 and 2022 were as follows: (in millions) 2024 2023 2022 Domestic operations $ ( 173.0 ) $ ( 124.8 ) $ ( 80.1 ) Foreign operations 85.7 111.7 95.0 Total $ ( 87.3 ) $ ( 13.1 ) $ 14.9
Schedule of Effective Income Tax Rate Reconciliation	The reconciliation of income taxes computed at the U.S. federal statutory income tax rate of 21 percent to our effective income tax rate for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 Income tax at U.S. statutory rate; 21 % $ ( 18.3 ) $ ( 2.7 ) $ 3.1 Unrecognized tax expense (benefits) ( 2.8 ) 1.0 ( 7.6 ) Statutory tax rate changes — 0.4 0.6 Statutory tax law changes — ( 3.6 ) — State, local and other tax, net of federal benefit ( 2.0 ) ( 1.3 ) 1.6 Impact from foreign inclusions 0.6 ( 0.7 ) 4.0 U.S. effect of foreign dividends and withholding taxes 4.1 3.9 1.8 Foreign income taxed at a higher effective rate 4.3 4.2 3.1 Brazilian Tax Assessments impact ( 1.6 ) ( 13.3 ) 1.9 Increase (decrease) in valuation allowance 2.4 5.4 3.4 General business credit ( 0.4 ) ( 2.2 ) ( 1.9 ) Excess expense from stock-based compensation 1.3 0.6 0.5 Impairment of non-deductible goodwill 26.8 18.8 20.7 Impact of legal entity rationalization — ( 4.1 ) Prior period tax return adjustment 0.1 ( 1.0 ) ( 0.1 ) Other (decrease) increase ( 0.2 ) ( 0.8 ) 1.1 Income taxes as reported $ 14.3 $ 8.7 $ 28.1 Effective tax rate ( 16.4 )% ( 66.4 )% 188.6 %
Schedule of Components of Income Tax Expense (Benefit)	The components of the income tax expense for the years ended December 31, 2024, 2023 and 2022 were as follows: (in millions) 2024 2023 2022 Current expense Federal and other $ ( 3.2 ) $ 0.2 $ 1.8 Foreign 24.4 28.6 25.0 Total current income tax expense 21.2 28.8 26.8 Deferred expense (benefit) Federal and other $ ( 7.0 ) $ ( 16.7 ) $ 6.8 Foreign 0.1 ( 3.4 ) ( 5.5 ) Total deferred income tax (benefit) expense ( 6.9 ) ( 20.1 ) 1.3 Total income tax expense $ 14.3 $ 8.7 $ 28.1
Schedule of Deferred Tax Assets and Liabilities	The components of deferred tax assets (liabilities) as of December 31, 2024 and 2023 were as follows: (in millions) 2024 2023 Deferred tax assets Compensation and benefits $ 20.3 $ 23.0 Pension 14.4 23.4 Inventory 8.1 10.4 Other reserves 13.9 18.9 Accounts receivable 5.1 7.4 Foreign tax credit carryforwards 6.8 6.4 Net operating loss carryforwards 74.8 76.7 Interest expense carryforwards 34.1 26.3 Section 174 capitalization 16.1 17.3 General business tax credit carryforwards 1.8 3.4 Other 2.1 5.2 Gross deferred income tax assets 197.5 218.4 Valuation allowance ( 60.3 ) ( 59.2 ) Net deferred tax assets 137.2 159.2 Deferred tax liabilities Depreciation ( 3.8 ) ( 5.7 ) Unremitted non-U.S. earnings accrual ( 4.1 ) ( 4.0 ) Identifiable intangibles ( 151.9 ) ( 170.4 ) Other — Gross deferred tax liabilities ( 159.8 ) ( 180.1 ) Net deferred tax liabilities $ ( 22.6 ) $ ( 20.9 )
Schedule of Unrecognized Tax Benefits Roll Forward	A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 Balance at beginning of year $ 28.0 $ 39.1 $ 43.3 Additions for tax positions of prior years 3.5 3.6 2.5 Reductions for tax positions of prior years ( 5.6 ) ( 17.7 ) ( 8.3 ) Increase (decrease) resulting from foreign currency translation ( 5.2 ) 3.0 1.6 Balance at end of year $ 20.7 $ 28.0 $ 39.1

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Summary of Weighted-Average Number of Shares Outstanding	Our weighted-average shares outstanding for the years ended December 31, 2024, 2023, and 2022 were as follows: Year Ended December 31, (in millions) 2024 2023 2022 Weighted-average number of shares of common stock outstanding - basic 95.6 95.3 95.3 Effect of dilutive securities: Restricted stock units — — — Weighted-average shares and assumed conversions - diluted (1) 95.6 95.3 95.3 (1) Due to the net loss during the twelve months ended December 31, 2024, 2023 and 2022 , diluted earnings per share are the same as basic earnings per share.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table summarizes the fair value of our derivative financial instruments as of December 31, 2024 and 2023: Fair Value of Derivative Instruments Derivative Assets Derivative Liabilities (in millions) Balance Sheet Location December 31, December 31, Balance Sheet Location December 31, December 31, Derivatives designated as hedging instruments: Foreign exchange contracts Other current assets $ 4.0 $ 0.3 Other current liabilities $ — $ 1.6 Derivatives not designated as hedging instruments: Foreign exchange contracts Other current assets 0.3 1.0 Other current liabilities 0.3 0.1 Foreign exchange contracts Other non-current assets 9.0 3.2 Other non-current liabilities 9.0 3.2 Total derivatives $ 13.3 $ 4.5 $ 9.3 $ 4.9
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The following tables summarize the pre-tax effect of the Company’s derivative financial instruments on the Consolidated Statements of Income for the years ended December 31, 2024, 2023, and 2022: The Effect of Derivative Instruments in Cash Flow Hedging Relationships on the Consolidated Financial Statements Amount of Gain (Loss) Recognized in AOCI (Effective Portion) Location of (Gain) Loss Reclassified from AOCI to Income Amount of (Gain) Loss Reclassified from AOCI to Income (Effective Portion) (in millions) 2024 2023 2022 2024 2023 2022 Cash flow hedges: Foreign exchange contracts $ 5.1 $ 0.4 $ 9.8 Cost of products sold $ ( 1.3 ) $ ( 2.8 ) $ ( 14.0 ) The Effect of Derivatives Not Designated as Hedging Instruments on the Consolidated Financial Statements Location of (Gain) Loss Recognized in Income on Derivatives Amount of (Gain) Loss Recognized in Income (in millions) 2024 2023 2022 Foreign exchange contracts Other (income) expense, net $ ( 4.5 ) $ 0.1 $ ( 3.7 )

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table sets forth our financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2024 and 2023: (in millions) December 31, December 31, Assets: Forward currency contracts $ 13.3 $ 4.5 Liabilities: Forward currency contracts $ 9.3 $ 4.9

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The components of, and changes in, AOCI were as follows: (in millions) Derivative Financial Instruments Foreign Currency Adjustments Unrecognized Pension and Other Post-retirement Benefit Costs Accumulated Other Comprehensive Income (Loss) Balance at December 31, 2022 $ 1.1 $ ( 380.1 ) $ ( 161.3 ) $ ( 540.3 ) Other comprehensive income (loss) before reclassifications, net of tax 0.2 30.3 ( 20.0 ) 10.5 Amounts reclassified from accumulated other comprehensive income (loss), net of tax ( 2.0 ) — 5.5 3.5 Balance at December 31, 2023 $ ( 0.7 ) $ ( 349.8 ) $ ( 175.8 ) $ ( 526.3 ) Other comprehensive income (loss) before reclassifications, net of tax 3.6 ( 66.1 ) 9.1 ( 53.4 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax ( 0.8 ) — 8.4 7.6 Balance at December 31, 2024 $ 2.1 $ ( 415.9 ) $ ( 158.3 ) $ ( 572.1 )
Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	The reclassifications out of AOCI for the years ended December 31, 2024, 2023, and 2022 were as follows: Year ended December 31, (in millions) 2024 2023 2022 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Location on Income Statement Gain (loss) on cash flow hedges: Foreign exchange contracts $ 1.3 $ 2.8 $ 14.0 Cost of products sold Tax benefit ( 0.5 ) ( 0.8 ) ( 4.1 ) Income tax expense Net of tax $ 0.8 $ 2.0 $ 9.9 Defined benefit plan items: Amortization of net actuarial loss (1) $ ( 11.1 ) $ ( 5.9 ) $ ( 8.2 ) Amortization of prior service cost (1) ( 0.3 ) ( 0.3 ) ( 0.3 ) Total before tax ( 11.4 ) ( 6.2 ) ( 8.5 ) Tax benefit 3.0 0.7 1.6 Income tax expense Net of tax $ ( 8.4 ) $ ( 5.5 ) $ ( 6.9 ) Total reclassifications for the period, net of tax $ ( 7.6 ) $ ( 3.5 ) $ 3.0 (1) These AOCI components are included in the computation of net periodic benefit (income) cost for pension and post-retirement plans (See "Note 5 . Pension and Other Retiree Benefits" for additional details).

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables present our net sales disaggregated by regional geography (1) , based upon our operating segments for the years ended December 31, 2024, 2023, and 2022, and our net sales disaggregated by the timing of revenue recognition for the years ended December 31, 2024, 2023, and 2022: (in millions) 2024 2023 2022 United States $ 719.7 $ 796.2 $ 894.1 Canada 88.0 95.0 108.8 Latin America 192.2 244.5 197.5 ACCO Brands Americas 999.9 1,135.7 1,200.4 EMEA (1) 521.8 547.2 580.3 Australia/N.Z. 112.3 118.5 125.6 Asia 32.2 31.4 41.3 ACCO Brands International 666.3 697.1 747.2 Net sales (2) $ 1,666.2 $ 1,832.8 $ 1,947.6 (1) ACCO Brands EMEA is comprised largely of Europe, but also includes export sales to the Middle East and Africa. (2) Net sales are attributed to geographic areas based on the location of the selling subsidiaries . (in millions) 2024 2023 2022 Product and services transferred at a point in time $ 1,629.7 $ 1,794.1 $ 1,899.5 Product and services transferred over time 36.5 38.7 48.1 Net sales $ 1,666.2 $ 1,832.8 $ 1,947.6

Information on Operating Segm_2

Information on Operating Segments (Tables)	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Schedule of Operating Results for Operating Segments	The operating results regularly provided to the CODM for our operating segments for the years ended December 31, 2024, 2023 and 2022 were as follows: Twelve Months Ended December 31, 2024 ACCO Brands Americas ACCO Brands International Total Net sales $ 999.9 $ 666.3 $ 1,666.2 Cost of products sold 666.0 444.8 1,110.8 Gross profit 333.9 221.5 555.4 Sales and marketing expenses (1) 115.2 91.5 206.7 Administrative expenses (2) 64.9 51.9 116.8 Restructuring 6.5 6.9 13.4 Impairment of goodwill and intangible assets 165.2 — 165.2 All other (3) 27.6 17.1 44.7 Segment operating (loss) income ( 45.5 ) 54.1 8.6 Corporate expense 45.6 Total consolidated operating loss ( 37.0 ) Interest expense (income), net 45.1 Non-operating pension expense 6.1 Other (income) expense, net ( 0.9 ) Loss before income tax $ ( 87.3 ) Twelve Months Ended December 31, 2023 ACCO Brands Americas ACCO Brands International Total Net Sales $ 1,135.7 $ 697.1 $ 1,832.8 Cost of products sold 761.7 472.8 1,234.5 Gross profit 374.0 224.3 598.3 Sales and marketing expenses (1) 123.7 94.2 217.9 Administrative expenses (2) 75.2 52.3 127.5 Restructuring 16.7 9.9 26.6 Impairment of goodwill and intangible assets 89.5 — 89.5 All other (3) 25.0 18.3 43.3 Segment operating income 43.9 49.6 93.5 Corporate expense 48.8 Total consolidated operating income 44.7 Interest expense (income), net 51.5 Non-operating pension expense 1.8 Other expense (income), net 4.5 Loss before income tax $ ( 13.1 ) Twelve Months Ended December 31, 2022 ACCO Brands Americas ACCO Brands International Total Net Sales $ 1,200.4 $ 747.2 $ 1,947.6 Cost of products sold 845.9 549.4 1,395.3 Gross profit 354.5 197.8 552.3 Sales and marketing expenses (1) 132.0 90.1 222.1 Administrative expenses (2) 64.2 49.4 113.6 Restructuring 6.0 3.4 9.4 Impairment of goodwill and intangible assets 98.7 — 98.7 All other (3) 24.9 16.3 41.2 Segment operating income 28.7 38.6 67.3 Corporate expense 32.5 Total consolidated operating income 34.8 Interest expense (income), net 37.3 Non-operating pension income ( 4.5 ) Other (income) expense, net ( 12.9 ) Income before income tax $ 14.9 (1) Sales and Marketing consists primarily of advertising, marketing, selling, customer service expenses and research and development. (2) Admin expense consists primarily of executive, finance, information technology and human resources expenses. (3) All other expense primarily consists of amortization and, for 2022, changes in the fair value of contingent earnout.
Reconciliation of Assets from Segment to Consolidated	The following table presents the measure of operating segment assets used by the Company’s CODM as of December 31, 2024 and 2023: (in millions) 2024 2023 ACCO Brands Americas $ 418.0 $ 533.5 ACCO Brands International 201.3 224.7 Total segment assets (4) 619.3 758.2 Goodwill 446.4 590.0 Identifiable intangibles, net 709.6 815.7 Property, plant and equipment, net 137.5 170.1 Unallocated assets (5) 315.6 310.8 Total assets $ 2,228.4 $ 2,644.8 (4) Segment assets represent assets that are regularly provided to the CODM and consist of accounts receivable less allowances and inventory. (5) Unallocated assets consist primarily of cash, deferred taxes, derivatives, prepaid pension assets, prepaid debt issuance costs and right of use asset, leases.
Schedule of Capital Spend and Depreciation Expense by Segment	Capital spend by operating segment for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 ACCO Brands Americas $ 10.2 $ 7.7 $ 11.7 ACCO Brands International 6.8 7.6 6.0 Total capital spend $ 17.0 $ 15.3 $ 17.7 Depreciation expense by operating segment for the years ended December 31, 2024, 2023 and 2022 was as follows: (in millions) 2024 2023 2022 ACCO Brands Americas $ 19.2 $ 20.4 $ 23.8 ACCO Brands International 9.2 12.3 14.1 Total depreciation $ 28.4 $ 32.7 $ 37.9
Schedule of Property, Plant and Equipment, Net by Geographic Region	Property, plant and equipment, net by operating segment as of December 31, 2024 and 2023 was as follows: (in millions) 2024 2023 U.S. $ 51.1 $ 68.2 Canada 0.9 1.5 Latin America 22.7 29.1 ACCO Brands Americas 74.7 98.8 ACCO Brands EMEA 53.5 60.9 Australia/N.Z. 8.7 9.5 Asia-Pacific 0.6 0.9 ACCO Brands International 62.8 71.3 Property, plant and equipment, net $ 137.5 $ 170.1

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Payments Under Unconditional Purchase Commitments	Future minimum payments under unconditional purchase commitments, primarily for inventory purchase commitments as of December 31, 2024 were as follows: (in millions) 2025 $ 113.3 2026 4.2 2027 1.3 2028 and thereafter — Total unconditional purchase commitments $ 118.8

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details) - Segment		12 Months Ended
	Jan. 01, 2024	Dec. 31, 2024
Business Acquisition [Line Items]
Number of operating segments	2	2

Significant Accounting Polici_4

Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards - Narrative (Details)			12 Months Ended
	May 31, 2024 USD ($)	Jan. 01, 2024 Segment	Dec. 31, 2024 USD ($) Segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 01, 2024
Accounting Policies [Line Items]
Number of operating segments | Segment		2	2
Interest costs capitalized			$ 0	$ 0	$ 0
Intangible assets, amortizable life						30 years
Goodwill impairment	$ 127,500,000		127,500,000	89,500,000
Deferred taxes for undistributed earnings of foreign subsidiaries			4,100,000
Undistributed earnings of foreign subsidiaries not permanently reinvested			330,700,000
Undistributed earnings of foreign subsidiaries			319,500,000
Advertising expenses			99,300,000	102,700,000	108,800,000
Research and development expenses			$ 23,000,000	25,800,000	$ 26,300,000
Minimum
Accounting Policies [Line Items]
Service And Maintenance Agreement Term			3 months
Maximum
Accounting Policies [Line Items]
Service And Maintenance Agreement Term			60 months
Amortizable Period, Option 1 | Minimum
Accounting Policies [Line Items]
Intangible assets, amortizable life			5 years
Amortizable Period, Option 2
Accounting Policies [Line Items]
Intangible assets, amortizable life			7 years
Amortizable Period, Option 3
Accounting Policies [Line Items]
Intangible assets, amortizable life			10 years
Amortizable Period, Option 4
Accounting Policies [Line Items]
Intangible assets, amortizable life			15 years
Amortizable Period, Option 5
Accounting Policies [Line Items]
Intangible assets, amortizable life			23 years
Amortizable Period, Option 6 | Maximum
Accounting Policies [Line Items]
Intangible assets, amortizable life			30 years
Buildings | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life			40 years
Buildings | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life			50 years
Machinery, equipment and furniture | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life			3 years
Machinery, equipment and furniture | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life			10 years
Computer software | Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life			5 years
Computer software | Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life			10 years
ACCO Brands International
Accounting Policies [Line Items]
Goodwill impairment			$ 0	$ 0

Acquisitions - Allocation of Co

Acquisitions - Allocation of Consideration Given to Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Less fair value of assets acquired:
Goodwill	$ 446.4	$ 590	$ 671.5

Long-term Debt and Short-term_3

Long-term Debt and Short-term Borrowings - Summary of Notes Payable and Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total debt	$ 839.7	$ 925.6
Current portion	51.3	36.7
Debt issuance costs, unamortized	5.1	6.7
Long-term debt, net	783.3	882.2
Euro Senior Secured Term Loan A due October 2029 (floating interest rate of 4.68% at December 31, 2024 and 5.93% at December 31, 2023)
Debt Instrument [Line Items]
Total debt	127.9	218.2
USD Senior Secured Term Loan A (floating interest rate of 7.50% at December 31, 2023
Debt Instrument [Line Items]
Total debt	0	78
Australian Dollar Senior Secured Term Loan A (floating interest rate of 6.42% at December 31, 2023
Debt Instrument [Line Items]
Total debt	0	32.5
Euro Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 4.68% at December 31, 2024)
Debt Instrument [Line Items]
Total debt	59.1	0
U.S. Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.47% at December 31, 2024 and 7.40% at December 31, 2023)
Debt Instrument [Line Items]
Total debt	34.4	7.3
Australian Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.44% at December 31, 2024 and 6.42% at December 31, 2023)
Debt Instrument [Line Items]
Total debt	32.8	14.3
Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25%)
Debt Instrument [Line Items]
Total debt	575	575
Other borrowings
Debt Instrument [Line Items]
Total debt	$ 10.5	$ 0.3

Long-term Debt and Short-term_4

Long-term Debt and Short-term Borrowings - Summary of Notes Payable and Long-Term Debt (Parenthetical) (Details)	Dec. 31, 2024	Dec. 31, 2023
Senior Secured Notes | Euro Senior Secured Term Loan A due October 2029 (floating interest rate of 4.68% at December 31, 2024 and 5.93% at December 31, 2023)
Debt Instrument [Line Items]
Floating interest rate (percent)	4.68%	5.93%
Senior Secured Notes | USD Senior Secured Term Loan A (floating interest rate of 7.50% at December 31, 2023
Debt Instrument [Line Items]
Floating interest rate (percent)		7.50%
Senior Secured Notes | Australian Dollar Senior Secured Term Loan A (floating interest rate of 6.42% at December 31, 2023
Debt Instrument [Line Items]
Floating interest rate (percent)		6.42%
Senior Secured Notes | Euro Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 4.68% at December 31, 2024)
Debt Instrument [Line Items]
Floating interest rate (percent)	4.68%
Senior Secured Notes | U.S. Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.47% at December 31, 2024 and 7.40% at December 31, 2023)
Debt Instrument [Line Items]
Floating interest rate (percent)	6.47%	7.40%
Senior Secured Notes | Australian Dollar Senior Secured Revolving Credit Facility, due October 2029 (floating interest rate of 6.44% at December 31, 2024 and 6.42% at December 31, 2023)
Debt Instrument [Line Items]
Floating interest rate (percent)	6.44%	6.42%
Senior Notes | Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25%)
Debt Instrument [Line Items]
Stated interest rate (percent)	4.25%	4.25%

Long-term Debt and Short-term_5

Long-term Debt and Short-term Borrowings - Narrative (Details) € in Millions, $ in Millions, $ in Millions		1 Months Ended		12 Months Ended
	May 23, 2019	Mar. 31, 2029	Mar. 31, 2027	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 30, 2024 USD ($)	Oct. 30, 2024 EUR (€)	Jan. 27, 2017 USD ($)	Jan. 27, 2017 EUR (€)	Jan. 27, 2017 AUD ($)
Debt Instrument [Line Items]
Total debt				$ 839.7	$ 925.6
Debt issuance costs				2.5	0	$ 1.2
Current portion of long-term debt				40.8	36.5
Long-term debt, net				783.3	882.2
Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25%)
Debt Instrument [Line Items]
Total debt				$ 575	$ 575
Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				1%
Senior Secured Notes
Debt Instrument [Line Items]
Credit agreement, face amount							$ 200	€ 184.8	$ 320.8	€ 300
Maximum borrowing capacity									100
Interest Coverage Ratio				5.35
Maximum consolidated leverage ratio for payment of dividends or repurchase of shares				4
Leverage ratio				3.38
Dividends and/or purchase shares, threshold				$ 40
Dividends and/or purchase shares, threshold, percent of total assets				1%
Senior Secured Notes | AUD Term Loan A
Debt Instrument [Line Items]
Maximum borrowing capacity									60.4		$ 80
Senior Secured Notes | Senior Secured Credit Facility Due March 2026
Debt Instrument [Line Items]
Maximum borrowing capacity, potential increase				$ 500
Senior Secured Notes | > 3.5
Debt Instrument [Line Items]
Commitment fee percent				0.35%
Senior Secured Notes | Minimum
Debt Instrument [Line Items]
Interest Coverage Ratio				3
Quarterly principal payment, based on annual percentage	1.25%
Senior Secured Notes | Maximum
Debt Instrument [Line Items]
Dividends and/or purchase shares, threshold				$ 75
Senior Secured Notes | Euro/AUD/CDN | > 3.5
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				2%
Senior Secured Notes | Applicable Rate on Base Rate Loans | > 3.5
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate				1%
Senior Secured Notes | Forecast | Maximum
Debt Instrument [Line Items]
Quarterly principal payment, based on annual percentage		2.50%	1.875%
Revolving Facility | Senior Secured Notes
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 467.5		$ 600
Total debt				$ 126.3
Amount available for borrowings under the Restated Revolver Facility				329.6
Letters of credit outstanding, amount				$ 11.6
Commitment fee percent				0.35%
Current portion of long-term debt				$ 34.4
Long-term debt, net				$ 91.9
Revolving Facility | Senior Secured Notes | Minimum
Debt Instrument [Line Items]
Commitment fee percent				0.25%
Revolving Facility | Senior Secured Notes | Maximum
Debt Instrument [Line Items]
Commitment fee percent				0.375%

Long-term Debt and Short-term_6

Long-term Debt and Short-term Borrowings - Schedule of Applicable Rate and Undrawn Fee Based on Company's Consolidated Leverage Ratio (Details) - Secured Debt (Details)	12 Months Ended
	Dec. 31, 2024
Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1%
Secured Debt | > 4.25
Debt Instrument [Line Items]
Undrawn fee	0.375%
Secured Debt | > 4.25 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	2.25%
Secured Debt | > 4.25 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.25%
Secured Debt | > 3.5
Debt Instrument [Line Items]
Undrawn fee	0.35%
Secured Debt | > 3.5 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	2%
Secured Debt | > 3.5 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1%
Secured Debt | > 2.5
Debt Instrument [Line Items]
Undrawn fee	0.30%
Secured Debt | > 2.5 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.75%
Secured Debt | > 2.5 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.75%
Secured Debt | ≤ 2.5
Debt Instrument [Line Items]
Undrawn fee	0.25%
Secured Debt | ≤ 2.5 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.50%
Secured Debt | ≤ 2.5 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.50%

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease cost	$ 29	$ 28.6	$ 29.5
Sublease income	(3.1)	(2.5)	(2.4)
Total lease cost	$ 25.9	$ 26.1	$ 27.1

Leases - Summary of Other Infor

Leases - Summary of Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating cash flows from operating leases	$ 27.9	$ 29.8
Right-of-use assets obtained in exchange for lease obligations, operating leases	$ 19.5	$ 23.2
Weighted average remaining lease term, operating leases (in years)	5 years 7 months 6 days
Weighted average discount rate, operating leases (as a percentage)	5.30%

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments, Net of Sub-Lease Income (Details) $ in Millions	Dec. 31, 2024 USD ($)
Operating Leases
2025	$ 26.2
2026	21.4
2027	16.6
2028	13.6
2029	10.6
Thereafter	17.8
Total minimum lease payments	106.2
Less imputed interest	17.8
Future minimum payments for leases, net of sublease rental income and imputed interest	$ 88.4

Pension and Other Retiree Ben_3

Pension and Other Retiree Benefits - Pension Benefit Obligation and Funded Status (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in plan assets
Employer contributions		$ 17.8
Amounts recognized in the Consolidated Balance Sheets consist of:
Pension and post-retirement benefit obligations		117.2	$ 157.6
Pension | U.S.
Change in projected benefit obligation (PBO)
Projected benefit obligation at beginning of year		162.6	162.3
Service cost		0	0	$ 0
Interest cost		7.7	7.9	4.9
Actuarial (gain) loss		(9.1)	3.2
Participants’ contributions		0	0
Benefits paid		(10.7)	(10.8)
Settlement		0	0
Termination benefits	[1]	0	0	0
Foreign exchange rate changes		0	0
Projected benefit obligation at end of year		150.5	162.6	162.3
Change in plan assets
Fair value of plan assets at beginning of year		145.5	140.2
Actual return on plan assets		7.6	13.6
Employer contributions		3	2.5
Participants’ contributions		0	0
Benefits paid		(10.7)	(10.8)
Settlement		0	0
Foreign exchange rate changes		0	0
Fair value of plan assets at end of year		145.4	145.5	140.2
Funded status (Fair value of plan assets less PBO)		(5.1)	(17.1)
Amounts recognized in the Consolidated Balance Sheets consist of:
Other non-current assets		0	0
Other current liabilities		0	0
Pension and post-retirement benefit obligations		5.1	17.1
Components of accumulated other comprehensive income (loss), net of tax:
Unrecognized actuarial loss (gain)		84.4	90.7
Unrecognized prior service cost		0	0
Pension | International
Change in projected benefit obligation (PBO)
Projected benefit obligation at beginning of year		467.4	441.1
Service cost		0.6	0.5	1
Interest cost		18.5	20	9.6
Actuarial (gain) loss		(34.4)	14.6
Participants’ contributions		0.1	0.1
Benefits paid		(27.7)	(27)
Settlement		(15.1)	(3.9)
Termination benefits	[1]	0	0	0.8
Foreign exchange rate changes		(12.9)	22
Projected benefit obligation at end of year		396.5	467.4	441.1
Change in plan assets
Fair value of plan assets at beginning of year		324.9	306.4
Actual return on plan assets		(8.4)	18.9
Employer contributions		14.5	14.1
Participants’ contributions		0.1	0.1
Benefits paid		(27.7)	(27)
Settlement		(15.1)	(4)
Foreign exchange rate changes		(5.4)	16.4
Fair value of plan assets at end of year		282.9	324.9	306.4
Funded status (Fair value of plan assets less PBO)		(113.6)	(142.5)
Amounts recognized in the Consolidated Balance Sheets consist of:
Other non-current assets		2.5	2.5
Other current liabilities		7.2	7.5
Pension and post-retirement benefit obligations		108.9	137.5
Components of accumulated other comprehensive income (loss), net of tax:
Unrecognized actuarial loss (gain)		121.9	139.9
Unrecognized prior service cost		4.9	5.2
Post-retirement
Change in projected benefit obligation (PBO)
Projected benefit obligation at beginning of year		3.3	3.2
Service cost		0	0	0
Interest cost		0.2	0.2	0.1
Actuarial (gain) loss		0.5	0.1
Participants’ contributions		0	0
Benefits paid		(0.3)	(0.3)
Settlement		0	0
Termination benefits	[1]	0	0	0
Foreign exchange rate changes		(0.1)	0.1
Projected benefit obligation at end of year		3.6	3.3	3.2
Change in plan assets
Fair value of plan assets at beginning of year		0	0
Actual return on plan assets		0	0
Employer contributions		0.3	0.3
Participants’ contributions		0	0
Benefits paid		(0.3)	(0.3)
Settlement		0	0
Foreign exchange rate changes		0	0
Fair value of plan assets at end of year		0	0	$ 0
Funded status (Fair value of plan assets less PBO)		(3.6)	(3.3)
Amounts recognized in the Consolidated Balance Sheets consist of:
Other non-current assets		0	0
Other current liabilities		0.4	0.3
Pension and post-retirement benefit obligations		3.2	3
Components of accumulated other comprehensive income (loss), net of tax:
Unrecognized actuarial loss (gain)		(2.6)	(3.6)
Unrecognized prior service cost		$ 0	$ 0
[1] Special termination benefit of $ 0.8 million due to the plan wind-up of our Canadian Salaried and Hourly pension plans effective July 1, 2022.

Pension and Other Retiree Ben_4

Pension and Other Retiree Benefits (Accumulated Benefit Obligations in Excess of Plan Assets) (Details) - Pension - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
U.S.
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	[1]	$ 150.5	$ 162.6
Fair value of plan assets		145.4	145.5
International
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	[1]	116.8	437.4
Fair value of plan assets		$ 4	$ 297.2
[1] The decrease in 2024 under International as compared to 2023 is the result of the ACCO U.K. plan ABO no longer being in excess of plan assets as of December 31, 2024, unlike the prior year.

Pension and Other Retiree Ben_5

Pension and Other Retiree Benefits - Projected Benefit Obligations in Excess of Plan Assets (Details) - Pension - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
U.S.
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 150.5	$ 162.6
Fair value of plan assets	145.4	145.5
International
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	385.1	442.1
Fair value of plan assets	$ 268.9	$ 297.2

Pension and Other Retiree Ben_6

Pension and Other Retiree Benefits - Net Periodic Benefit Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 0	$ 0	$ 0
Interest cost		7.7	7.9	4.9
Expected return on plan assets		(12.9)	(12)	(10.9)
Amortization of net loss (gain)		2.5	2.2	3.7
Amortization of prior service cost		0	0	0
Special termination benefit	[1]	0	0	0
Settlement	[2]	0	0	0
Net periodic benefit cost (income) cost	[3]	(2.7)	(1.9)	(2.3)
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.6	0.5	1
Interest cost		18.5	20	9.6
Expected return on plan assets		(19.6)	(21.5)	(17.5)
Amortization of net loss (gain)		5.4	4.2	5
Amortization of prior service cost		0.3	0.3	0.3
Special termination benefit	[1]	0	0	0.8
Settlement	[2]	4.6	1.2	0
Net periodic benefit cost (income) cost	[3]	9.8	4.7	(0.8)
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost		0	0	0
Interest cost		0.2	0.2	0.1
Expected return on plan assets		0	0	0
Amortization of net loss (gain)		(0.6)	(0.5)	(0.5)
Amortization of prior service cost		0	0	0
Special termination benefit	[1]	0	0	0
Settlement	[2]	0	0	0
Net periodic benefit cost (income) cost	[3]	$ (0.4)	$ (0.3)	$ (0.4)
[1] Special termination benefit of $ 0.8 million due to the plan wind-up of our Canadian Salaried and Hourly pension plans effective July 1, 2022. Settlement amounts of $ 4.6 million in 2024 and $ 1.2 million in 2023 are primarily related to the wind-up of our Canadian Salaried and Hourly pension plans. The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense (income)" in the Consolidated Statements of Loss .

Pension and Other Retiree Ben_7

Pension and Other Retiree Benefits - Other Changes Recognized in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	$ (3.8)	$ 1.6	$ (1)
Amortization of actuarial (loss) gain	(2.5)	(2.2)	(3.7)
Amortization of prior service cost	0	0	0
Foreign exchange rate changes	0	0	0
Total recognized in other comprehensive (loss) income	(6.3)	(0.6)	(4.7)
Total recognized in net periodic benefit (income) cost and other comprehensive (loss) income	(9)	(2.5)	(7)
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	(6.5)	17.2	(23.9)
Amortization of actuarial (loss) gain	(9.9)	(5.2)	(5.1)
Amortization of prior service cost	(0.3)	(0.3)	(0.3)
Foreign exchange rate changes	(1.7)	7.5	(21.5)
Total recognized in other comprehensive (loss) income	(18.4)	19.2	(50.8)
Total recognized in net periodic benefit (income) cost and other comprehensive (loss) income	(8.6)	23.9	(51.6)
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	0.5	0.1	(0.6)
Amortization of actuarial (loss) gain	0.5	0.5	0.5
Amortization of prior service cost	0	0	0
Foreign exchange rate changes	0.1	(0.1)	0.2
Total recognized in other comprehensive (loss) income	1.1	0.5	0.1
Total recognized in net periodic benefit (income) cost and other comprehensive (loss) income	$ 0.7	$ 0.2	$ (0.3)

Pension and Other Retiree Ben_8

Pension and Other Retiree Benefits - Weighted Average Assumptions Used in Calculating Benefit Obligation (Details)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.70%	5%	5.10%
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.80%	4.20%	4.50%
Rate of compensation increase	3%	2.90%	3%
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.20%	4.80%	3.80%

Pension and Other Retiree Ben_9

Pension and Other Retiree Benefits - Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5%	5.10%	2.90%
Expected long-term rate of return	8%	7.50%	6.50%
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.20%	4.50%	1.80%
Expected long-term rate of return	6.20%	6.90%	4%
Rate of compensation increase	2.90%	3%	3%
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.80%	5%	2.40%

Pension and Other Retiree Be_10

Pension and Other Retiree Benefits - Assumed Health Care Cost Trend Rates (Details) - Post-retirement	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next year	10%	9%	6%
Rate that the cost trend rate is assumed to decline (the ultimate trend rate)	8%	7%	5%
Year that the rate reaches the ultimate trend rate	2031	2031	2030

Pension and Other Retiree Be_11

Pension and Other Retiree Benefits - Weighted Average Asset Allocation (Details) - Pension		Dec. 31, 2024	Dec. 31, 2023
U.S.
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		100%	100%
U.S. | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		34%	37%
U.S. | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		59%	57%
U.S. | Real estate
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		4%	4%
U.S. | Other
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations	[1]	3%	2%
International
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		100%	100%
International | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		6%	7%
International | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		59%	63%
International | Real estate
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations		2%	3%
International | Other
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocations	[1]	33%	27%
[1] Multi-strategy hedge funds, commodity linked funds, private equity funds, and cash and cash equivalents for certain of our plans.

Pension and Other Retiree Be_12

Pension and Other Retiree Benefits - Fair Value of Plan Assets (Details) - Pension - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 145.4	$ 145.5	$ 140.2
U.S. | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	144	144.4
U.S. | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1.4	1.1
U.S. | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	145.4	145.5
U.S. | Mutual funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	110.9	106.1
U.S. | Mutual funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Mutual funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Mutual funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	110.9	106.1
U.S. | Exchange traded funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	33.1	38.3
U.S. | Exchange traded funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Exchange traded funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Exchange traded funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	33.1	38.3
U.S. | Common collective trust funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Common collective trust funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1.4	1.1
U.S. | Common collective trust funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
U.S. | Common collective trust funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1.4	1.1
International
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	282.9	324.9	$ 306.4
International | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	20.5	26.8
International | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	206.2	245.6
International | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3.1	6.4
International | Cash and cash equivalents | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Cash and cash equivalents | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3.1	6.4
International | Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	17.4	20.4
International | Equity securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	2.7
International | Equity securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Equity securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	17.4	23.1
International | Corporate debt securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Corporate debt securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	62	73.6
International | Corporate debt securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Corporate debt securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	62	73.6
International | Multi-strategy hedge funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Multi-strategy hedge funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	33.7	30.2
International | Multi-strategy hedge funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Multi-strategy hedge funds | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	33.7	30.2
International | Multi-strategy hedge funds | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	29.2	24.7
International | Insurance contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Insurance contracts | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4.2	4.1
International | Insurance contracts | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Insurance contracts | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4.2	4.1
International | Real estate | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Real estate | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0.8	3.7
International | Real estate | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Real estate | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0.8	3.7
International | Government debt securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Government debt securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	105.5	131.3
International | Government debt securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
International | Government debt securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	105.5	131.3
International | Real estate | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4.3	5.9
International | Private equity | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 22.7	$ 21.9

Pension and Other Retiree Be_13

Pension and Other Retiree Benefits - Estimated Future Benefit Payments (Details) $ in Millions	Dec. 31, 2024 USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
2025	$ 40.2
2026	39
2027	39.2
2028	40
2029	40.2
Years 2030 - 2034	208.3
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
2025	0.4
2026	0.4
2027	0.4
2028	0.4
2029	0.3
Years 2030 - 2034	$ 1.5

Pension and Other Retiree Be_14

Pension and Other Retiree Benefits - Multi-Employer (Details) - Pension - PACE Industry Union-Management Pension Fund - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Multiemployer Plans [Line Items]
Minimum Period in Years for Withdrawal Liability	20 years
Multiemployer Plans, Period Contributions, Significance of Contributions [true false]	false
Multiemployer Plan, Pension, Significant, Certified Zone Status [Fixed List]	Red	Red
FIP/RP Status	Implemented
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost	$ 0.1	$ 0.1	$ 0.1
Surcharge Imposed	Yes
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	Jun. 30, 2028

Pension and Other Retiree Be_15

Pension and Other Retiree Benefits - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) Yr	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Pension and post-retirement benefit obligations	$ 117.2	$ 157.6
Employer contributions	17.8
Expected contributions to defined benefit plans for 2022	16
Costs related to defined contribution plans	12.5	12.5	$ 13.2
Pension settlement cost	4.5
Esselte Leitz Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Unfunded Pension Plan liability	$ 98	109.9
Minimum
Defined Benefit Plan Disclosure [Line Items]
Payment of retirement benefits, commencement age for participants | Yr	60
Maximum
Defined Benefit Plan Disclosure [Line Items]
Payment of retirement benefits, commencement age for participants | Yr	65
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 542.9	625.1
Pension Plan | U.S.
Defined Benefit Plan Disclosure [Line Items]
Pension and post-retirement benefit obligations	5.1	17.1
Employer contributions	$ 3	$ 2.5
Pension Plan | U.S. | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	38%
Pension Plan | U.S. | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	54%
Pension Plan | U.S. | Alternate assets
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	8%

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	15,994,631
Capitalization of stock based compensation expense	$ 0
Proceeds from stock options exercised	0	$ 0	$ 4,300,000
Share-based compensation expense, shares that vests on grant date	$ 11,900,000	$ 14,800,000	9,500,000
Stock options granted	0	0
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period	7 years			10 years
Award vesting period	3 years
Proceeds from stock options exercised	$ 0	$ 0	4,300,000
Options exercised			500,000
Fair value of options vested during the period	2,500,000	3,400,000	3,100,000
Unrecognized compensation expense	$ 100,000
Weighted average years expense to be recognized over	2 months 12 days
Share-based compensation expense, shares that vests on grant date	$ 500,000	$ 2,700,000	$ 3,700,000
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Unrecognized compensation expense	$ 7,000,000
Weighted average years expense to be recognized over	1 year 10 months 24 days
Granted (in shares)	1,501,759	1,969,191	695,057
Vested and distributed (in shares)	(253,634)
Share-based compensation expense, shares that vests on grant date	$ 7,500,000	$ 6,400,000	$ 4,400,000
Shares outstanding (in shares)	4,241,889	3,444,450
Weighted average grant date fair value (in dollar per share)	$ 5.31	$ 5.23	$ 8.15
Fair value of stock awards vested	$ 3,300,000	$ 4,400,000	$ 5,100,000
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 4,400,000
Weighted average years expense to be recognized over	1 year 6 months
Granted (in shares)	1,825,683	2,301,907	1,170,884
Vested and distributed (in shares)	(685,998)	(336,077)	(350,656)
Share-based compensation expense, shares that vests on grant date	$ 3,900,000	$ 5,700,000	$ 1,400,000
Shares outstanding (in shares)	3,546,242	1,771,690
Weighted average grant date fair value (in dollar per share)	$ 5.8	$ 5.39	$ 8.88
Fair value of stock awards vested	$ 4,600,000	$ 2,800,000	$ 3,000,000
Shares called upon vested (in shares)	1
Minimum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage awarded	0%
Maximum | Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Percentage awarded	200%
Fully Vested On The Grant Date | Restricted stock units | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense, shares that vests on grant date	$ 1,400,000	$ 1,300,000	$ 1,200,000

Stock-Based Compensation - Shar

Stock-Based Compensation - Share-Based Compensation Expense by Line Item (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ (11.9)	$ (14.8)	$ (9.5)
Income tax expense	(2.9)	(3.4)	(2.2)
Net loss	(9)	(11.4)	(7.3)
SG&A Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 11.9	$ 14.8	$ 9.5

Stock-Based Compensation - Sh_2

Stock-Based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 11.9	$ 14.8	$ 9.5
Stock option compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0.5	2.7	3.7
RSU compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	7.5	6.4	4.4
PSU compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 3.9	$ 5.7	$ 1.4

Stock-Based Compensation - Weig

Stock-Based Compensation - Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2022 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average expected lives	6 years
Weighted average risk-free interest rate	1.89%
Weighted average expected volatility	41.70%
Expected dividend yield	3.60%
Weighted average grant date fair value ( in dollars per share)	$ 2.43

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Number Outstanding [Roll Forward]
Granted (in shares)	0	0
Employee Stock Option
Number Outstanding [Roll Forward]
Outstanding at December 31, 2023 (in shares)	6,625,226
Forfeited/Expired (in shares)	(913,930)
Outstanding at December 31, 2024 (in shares)	5,711,296	6,625,226
Exercisable shares at December 31, 2024 (in shares)	5,212,811
Weighted Average Exercise Price [Roll Forward]
Outstanding at December 31, 2023 (in dollar per share)	$ 9.26
Forfeited/Expired (in dollar per share)	11.27
Outstanding at December 31, 2024 (in dollar per share)	$ 8.94	$ 9.26
Outstanding at December 31, 2024, Weighted Average Remaining Contractual Term	4 years 8 months 12 days
Exercisable shares at December 31, 2024, Weighted Average Contractual Term	4 years 6 months
Outstanding at December 31, 2024, Aggregate Intrinsic Value	$ 0
Exercisable shares at December 31, 2024, Aggregate Intrinsic Value	$ 0

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock Units Rollforward (Details) - $ / shares		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
RSUs
Stock Units [Roll Forward]
Outstanding at December 31, 2023 (in shares)		3,444,450
Granted (in shares)		1,501,759	1,969,191	695,057
Vested and distributed (in shares)		(253,634)
Vested and deferred distributed (in shares)		(133,273)
Forfeited and cancelled (in shares)		(317,413)
Outstanding at December 31, 2024 (in shares)		4,241,889	3,444,450
Vested and deferred RSUs related to deferred compensation for non-employee directors (in shares)	[1]	767,216
Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at December 31, 2023, Weighted Average Grant Date Fair Value (in dollar per share)		$ 6.63
Granted, Weighted Average Grant Date Fair Value (in dollar per share)		5.31	$ 5.23	$ 8.15
Vested and Distributed, Weighted Average Grant Date Fair Value (in dollar per share)		8.43
Vested and Deferred Distributed, Weighted Average Grant Date Fair Value (in dollar per share)		7.71
Forfeited and cancelled, Weighted Average Grant Date Fair Value (in dollar per share)		6.09
Outstanding at December 31, 2024, Weighted Average Grant Date Fair Value (in dollar per share)		6.06	$ 6.63
Weighted Average Grant Date Fair Value of Vested and Deferred RSUs (in dollar per share)	[1]	$ 7.8
PSUs
Stock Units [Roll Forward]
Outstanding at December 31, 2023 (in shares)		1,771,690
Granted (in shares)		1,825,683	2,301,907	1,170,884
Vested and distributed (in shares)		(685,998)	(336,077)	(350,656)
Forfeited and cancelled (in shares)		(319,295)
Other - decrease due to performance of PSUs (in shares)		954,162
Outstanding at December 31, 2024 (in shares)		3,546,242	1,771,690
Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at December 31, 2023, Weighted Average Grant Date Fair Value (in dollar per share)		$ 6.48
Granted, Weighted Average Grant Date Fair Value (in dollar per share)		5.8	$ 5.39	$ 8.88
Vested and Distributed, Weighted Average Grant Date Fair Value (in dollar per share)		6.74
Forfeited and cancelled, Weighted Average Grant Date Fair Value (in dollar per share)		5.65
Other decrease due to performance of PSU's, Weighted Average Grant Date Fair Value (in dollar per share)		5.21
Outstanding at December 31, 2024, Weighted Average Grant Date Fair Value (in dollar per share)		$ 5.81	$ 6.48
[1] Included in outstanding at December 31, 2024 . Vested and deferred RSUs are primarily related to deferred compensation for non-employee directors.

Inventories - Components of Inv

Inventories - Components of Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 35.9	$ 50.1
Work in process	3.3	4.7
Finished goods	231.2	272.7
Total inventories	$ 270.4	$ 327.5

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment		$ 505.5	$ 599.6
Less: accumulated depreciation		(368)	(429.5)
Property, plant and equipment, net	[1]	137.5	170.1
Computer software included in net property, plant and equipment		29.4	37.9
Amortization of software costs		13.8	14.1	$ 13.9
Land and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment		17.4	20.9
Buildings and improvements to leaseholds
Property, Plant and Equipment [Line Items]
Property, plant and equipment		115.4	130.7
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment		365.2	442.9
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment		$ 7.5	$ 5.1
[1] Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

Goodwill and Identifiable Int_3

Goodwill and Identifiable Intangible Assets - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	May 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jun. 01, 2024
Finite-Lived Intangible Assets [Line Items]
Accumulated impairment losses		$ 530.8	$ 403.3	$ 313.8
Goodwill impairment	$ 127.5	127.5	89.5
Finite lived intangible asset useful life					30 years
Amortization of intangibles		$ 44.7	$ 43.4	$ 41.5
Indefinite-lived intangibles, impairment charge	$ 37.7
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]	Impairment Of Intangible Assets Indefinite Lived Including Goodwill

Goodwill and Identifiable Int_4

Goodwill and Identifiable Intangible Assets - Summary of Changes in Net Carrying Amount Goodwill By Segment (Details) - USD ($) $ in Millions		12 Months Ended
	May 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance		$ 590	$ 671.5
Goodwill impairment	$ (127.5)	(127.5)	(89.5)
Foreign currency translation		(16.1)	8
Ending balance		446.4	590
ACCO Brands Americas
Goodwill [Roll Forward]
Beginning balance		383.6	472.2
Goodwill impairment		(127.5)	(89.5)
Foreign currency translation		(2.8)	0.9
Ending balance		253.3	383.6
ACCO Brands International
Goodwill [Roll Forward]
Beginning balance		206.4	199.3
Goodwill impairment		0	0
Foreign currency translation		(13.3)	7.1
Ending balance		$ 193.1	$ 206.4

Goodwill and Identifiable Int_5

Goodwill and Identifiable Intangible Assets - Summary of Gross Carrying Value and Accumulated Amortization By Class of Identifiable Intangible Assets (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		$ 1,068.4	$ 950.1
Amortizable intangible assets, Accumulated Amortization		(415.5)	(385)
Amortizable intangible assets, Net Book Value		652.9	565.1
Total identifiable intangibles
Total identifiable intangible assets, Gross Carrying Amounts		1,169.6	1,245.2
Total identifiable intangibles, Accumulated Amortization		(460)	(429.5)
Total identifiable intangibles, Net Book Value		709.6	815.7
Trade Names
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts	[1]	627.5	497.1
Amortizable intangible assets, Accumulated Amortization	[1]	(157.5)	(142)
Amortizable intangible assets, Net Book Value	[1]	470	355.1
Customer and contractual relationships
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		350.7	362.4
Amortizable intangible assets, Accumulated Amortization		(230)	(221.3)
Amortizable intangible assets, Net Book Value		120.7	141.1
Vendor Relationships
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		82.4	82.4
Amortizable intangible assets, Accumulated Amortization		(22.2)	(16.7)
Amortizable intangible assets, Net Book Value		60.2	65.7
Patents
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		7.8	8.2
Amortizable intangible assets, Accumulated Amortization		(5.8)	(5)
Amortizable intangible assets, Net Book Value		2	3.2
Trade Names
Indefinite-lived intangible assets:
Indefinite-lived intangible assets, Gross Carrying Amount	[1],[2]	101.2	295.1
Indefinite-lived intangible asset, Accumulated Amortization	[1],[2]	(44.5)	(44.5)
Indefinite-lived intangible assets, Net Book Value	[1],[2]	$ 56.7	$ 250.6
[1] Reflects the change of our Five Star ® and Swingline ® indefinite-lived trade names to amortizable intangible assets as of June 1, 2024. Accumulated amortization prior to the adoption of authoritative guidance on goodwill and other intangible assets, at which time further amortization ceased.

Goodwill and Identifiable Int_6

Goodwill and Identifiable Intangible Assets - Amortization Expense and Estimated Future Amortization (Details) $ in Millions	Dec. 31, 2024 USD ($)	[1]
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated amortization expense, 2025	$ 44.8
Estimated amortization expense, 2026	42.8
Estimated amortization expense, 2027	40.4
Estimated amortization expense, 2028	38.3
Estimated amortization expense, 2029	$ 36.6
[1] Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization of intangible assets and other events.

Restructuring - Narrative (Deta

Restructuring - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Net restructuring expenses	$ 16.8	$ 27.2	$ 9.6

Restructuring - Summary of Acti

Restructuring - Summary of Activity in Restructuring Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 28.4		$ 8.7		$ 4.5
Provision	16.8		27.2		9.6
Cash expenditures	(18.1)		(7.8)		(5.3)
Non-cash Items/ Currency Change	(0.5)		0.3		(0.1)
Balance at end of period	26.6		28.4		8.7
Employee termination costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	27.5	[1]	8.7		3.4
Provision	16.6	[1]	26.1		9.4
Cash expenditures	(17)	[1]	(7.6)		(4)
Non-cash Items/ Currency Change	(0.5)	[1]	0.3		(0.1)
Balance at end of period	26.6	[1]	27.5	[1]	8.7
Termination of lease agreements
Restructuring Reserve [Roll Forward]
Balance at beginning of period			0		1.1
Provision					(0.2)
Cash expenditures					(0.9)
Non-cash Items/ Currency Change					0
Balance at end of period					0
Other
Restructuring Reserve [Roll Forward]
Balance at beginning of period	0.9		0		0
Provision	0.2		1.1		0.4
Cash expenditures	(1.1)		(0.2)		(0.4)
Non-cash Items/ Currency Change	0		0		0
Balance at end of period	$ 0		$ 0.9		$ 0
[1] We expect the remaining $ 26.6 million of employee termination costs to be substantially paid within the next twelve months

Restructuring - Summary of Ac_2

Restructuring - Summary of Activity in Restructuring Liability (Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 26.6		$ 28.4		$ 8.7	$ 4.5
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 26.6	[1]	$ 27.5	[1]	$ 8.7	$ 3.4
Payment period for restructuring costs	12 months
[1] We expect the remaining $ 26.6 million of employee termination costs to be substantially paid within the next twelve months

Restructuring - Restructuring C

Restructuring - Restructuring Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 16.8		$ 27.2	$ 9.6
Operating Segments | ACCO Brands Americas
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6.5		16.7	6
Operating Segments | ACCO Brands International
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6.9		9.9	3.4
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.4		0.6	0.2
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	16.6	[1]	26.1	9.4
Termination of lease agreements
Restructuring Cost and Reserve [Line Items]
Restructuring charges				(0.2)
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0.2		$ 1.1	$ 0.4
[1] We expect the remaining $ 26.6 million of employee termination costs to be substantially paid within the next twelve months

Income Taxes - Components of (L

Income Taxes - Components of (Loss) Income Before Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Domestic operations	$ (173)	$ (124.8)	$ (80.1)
Foreign operations	85.7	111.7	95
Income before income tax	$ (87.3)	$ (13.1)	$ 14.9

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income tax at U.S. statutory rate; 21%	$ (18.3)	$ (2.7)	$ 3.1
Unrecognized tax expense (benefits)	(2.8)	1	(7.6)
Statutory tax rate changes	0	0.4	0.6
Statutory tax law changes	0	(3.6)	0
State, local and other tax, net of federal benefit	(2)	(1.3)	1.6
Impact from foreign inclusions	0.6	(0.7)	4
U.S. effect of foreign dividends and withholding taxes	4.1	3.9	1.8
Foreign income taxed at a higher effective rate	4.3	4.2	3.1
Brazilian Tax Assessments impact	(1.6)	(13.3)	1.9
Increase (decrease) in valuation allowance	2.4	5.4	3.4
General business credit	(0.4)	(2.2)	(1.9)
Excess expense from stock-based compensation	1.3	0.6	0.5
Impairment of non-deductible goodwill	26.8	18.8	20.7
Impact of legal entity rationalization		0	(4.1)
Prior period tax return adjustment	0.1	(1)	(0.1)
Other (decrease) increase	(0.2)	(0.8)	1.1
Total income tax expense	$ 14.3	$ 8.7	$ 28.1
Effective income tax rate	(16.40%)	(66.40%)	188.60%

Income Taxes - Components of In

Income Taxes - Components of Income Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current expense
Federal and other	$ (3.2)	$ 0.2	$ 1.8
Foreign	24.4	28.6	25
Total current income tax expense	21.2	28.8	26.8
Deferred expense (benefit)
Federal and other	(7)	(16.7)	6.8
Foreign	0.1	(3.4)	(5.5)
Total deferred income tax (benefit) expense	(6.9)	(20.1)	1.3
Total income tax expense	$ 14.3	$ 8.7	$ 28.1

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Compensation and benefits	$ 20,300,000	$ 23,000,000
Pension	14,400,000	23,400,000
Inventory	8,100,000	10,400,000
Other reserves	13,900,000	18,900,000
Accounts receivable	5,100,000	7,400,000
Foreign tax credit carryforwards	6,800,000	6,400,000
Net operating loss carryforwards	74,800,000	76,700,000
Interest expense carryforwards	34,100,000	26,300,000
Section 174 capitalization	16,100,000	17,300,000
General business tax credit carryforwards	1,800,000	3,400,000
Other	2,100,000	5,200,000
Gross deferred income tax assets	197,500,000	218,400,000
Valuation allowance	(60,300,000)	(59,200,000)
Net deferred tax assets	137,200,000	159,200,000
Deferred tax liabilities
Depreciation	(3,800,000)	(5,700,000)
Unremitted non-U.S. earnings accrual	(4,100,000)	(4,000,000)
Identifiable intangibles	(151,900,000)	(170,400,000)
Other		0
Gross deferred tax liabilities	(159,800,000)	(180,100,000)
Net deferred tax liabilities	$ (22,600,000)	$ (20,900,000)

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 28	$ 39.1	$ 43.3
Additions for tax positions of prior years	3.5	3.6	2.5
Reductions for tax positions of prior years	(5.6)	(17.7)	(8.3)
Increase (decrease) resulting from foreign currency translation	(5.2)	3	1.6
Balance at end of year	$ 20.7	$ 28	$ 39.1

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2023	Mar. 31, 2019	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2012
Income Tax Examination [Line Items]
U.S. statutory rate				21%	21%	21%
Income tax expense				$ 14,300,000	$ 8,700,000	$ 28,100,000
(Loss) income before income tax				$ (87,300,000)	$ (13,100,000)	$ 14,900,000
Effective tax rate				(16.40%)	(66.40%)	188.60%
Valuation allowance	$ 59,200,000			$ 60,300,000	$ 59,200,000
Increase in valuation allowance				1,100,000
Increase to existing valuation allowance				1,300,000
Operating loss carryforwards				13,900,000
Federal general business credit carryforwards	3,400,000			1,800,000	3,400,000
Operating loss carryforwards, valuation allowance	60,900,000				60,900,000
Deferred taxes for undistributed earnings of foreign subsidiaries				4,100,000
Undistributed earnings of foreign subsidiaries not permanently reinvested				330,700,000
Undistributed earnings of foreign subsidiaries				319,500,000
Foreign tax credit carryforwards	6,400,000			6,800,000	6,400,000
Unrecognized tax benefits	28,000,000			20,700,000	28,000,000	$ 39,100,000	$ 43,300,000
Unrecognized tax benefits, income tax penalties and interest accrued				13,000,000
Excess benefit from stock-based compensation				(1,300,000)	(600,000)	(500,000)
Additions for tax positions of prior years				$ 3,500,000	3,600,000	2,500,000
Minimum global tax				15%
Standard penalty cancellation percentage			75%
Penalties, interest and other fees penalties	13,300,000
Maximum
Income Tax Examination [Line Items]
Reasonably possible change in unrecognized tax benefit				$ 2,400,000
Foreign Currency Translation
Income Tax Examination [Line Items]
Increase in valuation allowance				$ 2,400,000
Foreign Tax Authority
Income Tax Examination [Line Items]
Operating loss carryforwards	$ 266,200,000				266,200,000
Foreign Tax Authority | Minimum
Income Tax Examination [Line Items]
Statutes of limitation, period				2 years
Foreign Tax Authority | Maximum
Income Tax Examination [Line Items]
Statutes of limitation, period				6 years
Foreign Tax Authority | Tax Year 2027
Income Tax Examination [Line Items]
Tax credit carryforward subject to expiration				$ 4,900,000
Foreign Tax Authority | Tax Year 2034
Income Tax Examination [Line Items]
Tax credit carryforward subject to expiration				$ 1,900,000
Foreign Tax Authority | Australian Taxation Office
Income Tax Examination [Line Items]
Open tax year				2020 2021 2022 2023 2024
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil
Income Tax Examination [Line Items]
Income tax expense				$ (2,600,000)
Open tax year				2019 2020 2021 2022 2023 2024
Income tax examination, interest expense				$ 600,000	$ 900,000	$ 1,500,000
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2008 to 2010
Income Tax Examination [Line Items]
Additions for tax positions of prior years		$ 5,600,000
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Years 2007-2012
Income Tax Examination [Line Items]
Unrecognized tax benefits								$ 44,500,000
Potential tax assessment, accrued reserve related to fair value of liabilities acquired								$ 43,300,000
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 to 2010 | Other Noncurrent Liabilities
Income Tax Examination [Line Items]
Unrecognized tax benefits				$ 17,800,000
Foreign Tax Authority | Canada Revenue Agency
Income Tax Examination [Line Items]
Open tax year				2019 2020 2021 2022 2023 2024
Foreign Tax Authority | Federal Ministry of Finance, Germany
Income Tax Examination [Line Items]
Open tax year				2020 2021 2022 2023 2024
Foreign Tax Authority | Swedish Tax Agency (Skatteverket)
Income Tax Examination [Line Items]
Open tax year				2023 2024
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC)
Income Tax Examination [Line Items]
Open tax year				2023 2024

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Common stock outstanding (in shares)	92,881,008	94,925,652	94,300,000
Common stock repurchases (in shares)	2,900,000	0	2,700,000
Shares related to tax withholding for share-based compensation (in shares)	400,000	300,000	300,000
Potentially dilutive shares excluded from computation of dilutive earnings per share (in shares)	10,100,000	9,900,000	9,800,000

Earnings Per Share - Summary of

Earnings Per Share - Summary of Weighted-Average Shares Outstanding (Details) - shares shares in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average number of common shares outstanding - basic (in shares)		95.6	95.3	95.3
Weighted-average number of common shares outstanding - diluted (in shares)	[1]	95.6	95.3	95.3
Restricted stock units
Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract]
Incremental dilutive common shares (in shares)		0	0
[1] Due to the net loss during the twelve months ended December 31, 2024, 2023 and 2022 , diluted earnings per share are the same as basic earnings per share.

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details) - Foreign exchange contracts - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Derivatives not designated as hedging instruments
Derivative [Line Items]
U.S. dollar equivalent notional value	$ 73,600,000	$ 102,300,000
Cash Flow Hedging | Derivatives designated as hedging instruments
Derivative [Line Items]
U.S. dollar equivalent notional value	$ 76,900,000	$ 80,200,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 13.3	$ 4.5
Derivative Liabilities	9.3	4.9
Foreign exchange contracts | Derivatives designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	4	0.3
Foreign exchange contracts | Derivatives designated as hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	1.6
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	0.3	1
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0.3	0.1
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	9	3.2
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 9	$ 3.2

Derivative Financial Instrume_5

Derivative Financial Instruments - Effect of Derivative Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI (Effective Portion)	$ 5.1	$ 0.4	$ 9.8
Foreign exchange contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Reclassified from AOCI to Income (Effective Portion)	(1.3)	(2.8)	(14)
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Income	$ (4.5)	$ 0.1	$ (3.7)

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Schedule of Fair Value Assets and Liabilities Measured on a Recurring Basis (Details) - Significant Other Observable Inputs (Level 2) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward currency contracts, assets	$ 13.3	$ 4.5
Forward currency contracts, liabilities	$ 9.3	$ 4.9

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt	$ 839.7	$ 925.6
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of total debt	$ 789.4	$ 870.9

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	$ 787	$ 810.1
Balance at end of period	606.1	787
Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(0.7)	1.1
Other comprehensive income (loss) before reclassifications, net of tax	3.6	0.2
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(0.8)	(2)
Balance at end of period	2.1	(0.7)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(349.8)	(380.1)
Other comprehensive income (loss) before reclassifications, net of tax	(66.1)	30.3
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0
Balance at end of period	(415.9)	(349.8)
Unrecognized Pension and Other Post-retirement Benefit Costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(175.8)	(161.3)
Other comprehensive income (loss) before reclassifications, net of tax	9.1	(20)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	8.4	5.5
Balance at end of period	(158.3)	(175.8)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(526.3)	(540.3)
Other comprehensive income (loss) before reclassifications, net of tax	(53.4)	10.5
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	7.6	3.5
Balance at end of period	$ (572.1)	$ (526.3)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold		$ 1,110.8	$ 1,234.5	$ 1,395.3
Tax benefit		(14.3)	(8.7)	(28.1)
Net Income (Loss)		(101.6)	(21.8)	(13.2)
Income before income tax		(87.3)	(13.1)	14.9
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income (Loss)		(7.6)	(3.5)	3
Unrecognized Pension and Other Post-retirement Benefit Costs | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit		3	0.7	1.6
Net Income (Loss)		(8.4)	(5.5)	(6.9)
Amortization of net actuarial loss	[1]	(11.1)	(5.9)	(8.2)
Amortization of prior service cost	[1]	(0.3)	(0.3)	(0.3)
Income before income tax		(11.4)	(6.2)	(8.5)
Foreign exchange contracts | Derivative Financial Instruments | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold		1.3	2.8	14
Tax benefit		(0.5)	(0.8)	(4.1)
Net Income (Loss)		$ 0.8	$ 2	$ 9.9
[1] These AOCI components are included in the computation of net periodic benefit (income) cost for pension and post-retirement plans (See "Note 5 . Pension and Other Retiree Benefits" for additional details).

Revenue Recognition - Service o

Revenue Recognition - Service or Extended Maintenance Agreements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Unearned revenue associated with outstanding contracts	$ 2.9	$ 2.9
Revenue recognized	$ 2.5

Revenue Recognition - Unearned

Revenue Recognition - Unearned Revenue (Details) $ in Millions	Dec. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unearned revenue	$ 2.4
Expected timing of satisfaction	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unearned revenue	$ 0.5
Expected timing of satisfaction	12 months

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 1,666.2	$ 1,832.8	$ 1,947.6
Product and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales		1,629.7	1,794.1	1,899.5
Product and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales		36.5	38.7	48.1
ACCO Brands Americas
Disaggregation of Revenue [Line Items]
Net sales		999.9	1,135.7	1,200.4
ACCO Brands Americas | United States
Disaggregation of Revenue [Line Items]
Net sales		719.7	796.2	894.1
ACCO Brands Americas | Canada
Disaggregation of Revenue [Line Items]
Net sales		88	95	108.8
ACCO Brands Americas | Latin America
Disaggregation of Revenue [Line Items]
Net sales		192.2	244.5	197.5
ACCO Brands International
Disaggregation of Revenue [Line Items]
Net sales		666.3	697.1	747.2
ACCO Brands International | EMEA
Disaggregation of Revenue [Line Items]
Net sales	[2]	521.8	547.2	580.3
ACCO Brands International | Australia/N.Z.
Disaggregation of Revenue [Line Items]
Net sales		112.3	118.5	125.6
ACCO Brands International | Asia
Disaggregation of Revenue [Line Items]
Net sales		$ 32.2	$ 31.4	$ 41.3
[1] Net sales are attributed to geographic areas based on the location of the selling subsidiaries ACCO Brands EMEA is comprised largely of Europe, but also includes export sales to the Middle East and Africa.

Information on Operating Segm_3

Information on Operating Segments - Narrative (Details) $ in Millions		12 Months Ended
	Jan. 01, 2024 Segment	Dec. 31, 2024 USD ($) Customer Segment	Dec. 31, 2023 USD ($) Customer	Dec. 31, 2022 USD ($) Customer
Segment Reporting Information [Line Items]
Number of operating segments | Segment	2	2
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]		President And Chief Executive Officer [Member]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description		The CODM reviews discrete financial results at the operating segment level to assess performance and allocate resources.
Number of customers exceeded 10 percent of net sales | Customer		0	0	0
Sales Revenue, Net | Customer Concentration Risk | Top five customers
Segment Reporting Information [Line Items]
Concentration risk, sales		$ 532.9	$ 609	$ 663.3
Accounts Receivable | Customer Concentration Risk | Top five customers
Segment Reporting Information [Line Items]
Concentration risk, trade accounts receivable		$ 116.3	$ 138.1

Information on Operating Segm_4

Information on Operating Segments - Schedule of Operating Results for Operating Segments (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales		$ 1,666.2	$ 1,832.8	$ 1,947.6
Cost of products sold		1,110.8	1,234.5	1,395.3
Gross profit		555.4	598.3	552.3
Sales and marketing expenses	[1]	206.7	217.9	222.1
Administrative expenses	[2]	116.8	127.5	113.6
Restructuring		13.4	26.6	9.4
Impairment of goodwill and intangible assets		165.2	89.5	98.7
All other	[3]	44.7	43.3	41.2
Total consolidated operating income (loss)		(37)	44.7	34.8
Interest expense (income), net		45.1	51.5	37.3
Non-operating pension expense (income)		6.1	1.8	(4.5)
Other (income) expense, net		(0.9)	4.5	(12.9)
(Loss) income before income tax		(87.3)	(13.1)	14.9
Operating Segments
Segment Reporting Information [Line Items]
Total consolidated operating income (loss)		8.6	93.5	67.3
Corporate Expense
Segment Reporting Information [Line Items]
Total consolidated operating income (loss)		45.6	48.8	32.5
ACCO Brands Americas
Segment Reporting Information [Line Items]
Net sales		999.9	1,135.7	1,200.4
Cost of products sold		666	761.7	845.9
Gross profit		333.9	374	354.5
Sales and marketing expenses	[1]	115.2	123.7	132
Administrative expenses	[2]	64.9	75.2	64.2
Restructuring		6.5	16.7	6
Impairment of goodwill and intangible assets		165.2	89.5	98.7
All other	[3]	27.6	25	24.9
ACCO Brands Americas | Operating Segments
Segment Reporting Information [Line Items]
Total consolidated operating income (loss)		(45.5)	43.9	28.7
ACCO Brands International
Segment Reporting Information [Line Items]
Net sales		666.3	697.1	747.2
Cost of products sold		444.8	472.8	549.4
Gross profit		221.5	224.3	197.8
Sales and marketing expenses	[1]	91.5	94.2	90.1
Administrative expenses	[2]	51.9	52.3	49.4
Restructuring		6.9	9.9	3.4
All other	[3]	17.1	18.3	16.3
ACCO Brands International | Operating Segments
Segment Reporting Information [Line Items]
Total consolidated operating income (loss)		$ 54.1	$ 49.6	$ 38.6
[1] Sales and Marketing consists primarily of advertising, marketing, selling, customer service expenses and research and development. Admin expense consists primarily of executive, finance, information technology and human resources expenses. All other expense primarily consists of amortization and, for 2022, changes in the fair value of contingent earnout.

Information on Operating Segm_5

Information on Operating Segments - Assets by Segment (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Assets		$ 2,228.4	$ 2,644.8
Goodwill		446.4	590	$ 671.5
Identifiable intangibles, net		709.6	815.7
Property, plant and equipment, net	[1]	137.5	170.1
Operating Segments
Segment Reporting Information [Line Items]
Assets	[2]	619.3	758.2
Unallocated Assets
Segment Reporting Information [Line Items]
Assets	[3]	315.6	310.8
ACCO Brands Americas
Segment Reporting Information [Line Items]
Goodwill		253.3	383.6	472.2
Property, plant and equipment, net		74.7	98.8
ACCO Brands Americas | Operating Segments
Segment Reporting Information [Line Items]
Assets		418	533.5
ACCO Brands International
Segment Reporting Information [Line Items]
Goodwill		193.1	206.4	$ 199.3
Property, plant and equipment, net		62.8	71.3
ACCO Brands International | Operating Segments
Segment Reporting Information [Line Items]
Assets		$ 201.3	$ 224.7
[1] Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively. Segment assets represent assets that are regularly provided to the CODM and consist of accounts receivable less allowances and inventory. Unallocated assets consist primarily of cash, deferred taxes, derivatives, prepaid pension assets, prepaid debt issuance costs and right of use asset, leases.

Information on Operating Segm_6

Information on Operating Segments - Capital Spend by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total capital spend	$ 17	$ 15.3	$ 17.7
ACCO Brands Americas
Segment Reporting Information [Line Items]
Total capital spend	10.2	7.7	11.7
ACCO Brands International
Segment Reporting Information [Line Items]
Total capital spend	$ 6.8	$ 7.6	$ 6

Information on Operating Segm_7

Information on Operating Segments - Depreciation Expense by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total depreciation	$ 28.4	$ 32.7	$ 37.9
ACCO Brands Americas
Segment Reporting Information [Line Items]
Total depreciation	19.2	20.4	23.8
ACCO Brands International
Segment Reporting Information [Line Items]
Total depreciation	$ 9.2	$ 12.3	$ 14.1

Information on Operating Segm_8

Information on Operating Segments - Property, Plant and Equipment by Geographic Region (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Property, plant and equipment, net	[1]	$ 137.5	$ 170.1
ACCO Brands Americas
Segment Reporting Information [Line Items]
Property, plant and equipment, net		74.7	98.8
ACCO Brands Americas | U.S.
Segment Reporting Information [Line Items]
Property, plant and equipment, net		51.1	68.2
ACCO Brands Americas | Canada
Segment Reporting Information [Line Items]
Property, plant and equipment, net		0.9	1.5
ACCO Brands Americas | Latin America
Segment Reporting Information [Line Items]
Property, plant and equipment, net		22.7	29.1
ACCO Brands International
Segment Reporting Information [Line Items]
Property, plant and equipment, net		62.8	71.3
ACCO Brands International | EMEA
Segment Reporting Information [Line Items]
Property, plant and equipment, net		53.5	60.9
ACCO Brands International | Australia/N.Z.
Segment Reporting Information [Line Items]
Property, plant and equipment, net		8.7	9.5
ACCO Brands International | Asia-Pacific
Segment Reporting Information [Line Items]
Property, plant and equipment, net		$ 0.6	$ 0.9
[1] Net property, plant and equipment as of December 31, 2024 and 2023 included $ 29.4 million and $ 37.9 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $ 13.8 million , $ 14.1 million and $ 13.9 million for the years ended December 31, 2024, 2023 and 2022 , respectively.

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Tax credits	$ 0.4	$ 2.2	$ 1.9
Tax benefit	(14.3)	(8.7)	(28.1)
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil
Loss Contingencies [Line Items]
Tax credits	1.9	$ 1.3	$ 11.1
Tax benefit	$ 2.6

Commitments and Contingencies_2

Commitments and Contingencies - Purchase Commitments (Details) $ in Millions	Dec. 31, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2025	$ 113.3
2026	4.2
2027	1.3
2028 and thereafter	0
Total unconditional purchase commitments	$ 118.8

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 9.3	$ 9.1	$ 10
Additions charged to expense	0.7	1.3	0.5
Deductions	(2.2)	(1.6)	(1.5)
Foreign exchange changes	(1.1)	0.5	0.1
Balance at end of year	6.7	9.3	9.1
Allowance for Sales Discounts and Other Credits
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	11.6	15.6	15.2
Additions charged to expense	5.2	8.1	15.7
Deductions	(8.8)	(11.8)	(13.8)
Foreign exchange changes	(0.1)	(0.3)	(1.5)
Balance at end of year	7.9	11.6	15.6
Allowance for Cash Discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	2	1.9	2.4
Additions charged to expense	18.4	20.7	22.9
Deductions	(18.7)	(20.7)	(23.3)
Foreign exchange changes	(0.1)	0.1	(0.1)
Balance at end of year	1.6	2	1.9
Warranty Reserves
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	6	6.4	5.7
Additions charged to expense	2.8	3.8	5.3
Deductions	(3.6)	(4.5)	(4.3)
Foreign exchange changes	(0.3)	0.3	(0.3)
Balance at end of year	4.9	6	6.4
Income Tax Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	59.2	51.9	52.4
Additions charged to expense	2.4	5.4	3.2
Foreign exchange changes	(1.3)	1.9	(3.7)
Balance at end of year	$ 60.3	$ 59.2	$ 51.9