ACCO Brands (ACCO) 10-Q 1 Nov 24 2024 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2024	Oct. 24, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
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 $0.01 per share
Trading Symbol	ACCO
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		92,881,008
Entity Central Index Key	0000712034
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 102	$ 66.4
Accounts receivable, net	325.7	430.7
Inventories	324.8	327.5
Other current assets	41.5	30.8
Total current assets	794	855.4
Total property, plant and equipment	577.6	599.6
Less: accumulated depreciation	(423.9)	(429.5)
Property, plant and equipment, net	153.7	170.1
Right of use asset, leases	86.3	91
Deferred income taxes	102.7	104.7
Goodwill	459	590
Identifiable intangibles, net	740.9	815.7
Other non-current assets	20.9	17.9
Total assets	2,357.5	2,644.8
Current liabilities:
Notes payable	7.9	0.2
Current portion of long-term debt	51.3	36.5
Accounts payable	182.4	183.7
Accrued compensation	42.4	53.3
Accrued customer program liabilities	77.4	104
Lease liabilities	22.3	20.5
Other current liabilities	114	143.8
Total current liabilities	497.7	542
Long-term debt, net	849.8	882.2
Long-term lease liabilities	71.3	76.8
Deferred income taxes	118.1	125.6
Pension and post-retirement benefit obligations	143.9	157.6
Other non-current liabilities	61.2	73.6
Total liabilities	1,742	1,857.8
Stockholders' equity:
Common stock	1	1
Treasury stock	(47)	(45.1)
Paid-in capital	1,911.1	1,913.4
Accumulated other comprehensive loss	(548.9)	(526.3)
Accumulated deficit	(700.7)	(556)
Total stockholders' equity	615.5	787
Total liabilities and stockholders' equity	$ 2,357.5	$ 2,644.8

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales		$ 420.9	$ 448	$ 1,218.1	$ 1,344.2
Cost of products sold		284	303.2	818.2	915.9
Gross profit		136.9	144.8	399.9	428.3
Operating costs and expenses:
Selling, general and administrative expenses		92.2	98.8	274.4	291.8
Amortization of intangibles		11.7	10.8	33.2	32.7
Restructuring		6.7	3	6.1	6.3
Impairment of goodwill and intangible assets		0	0	165.2	0
Total operating costs and expenses		110.6	112.6	478.9	330.8
Operating income (loss)	[1]	26.3	32.2	(79)	97.5
Non-operating expense (income):
Interest expense		13.7	15.6	40.8	45
Interest income		(2)	(1.6)	(6.1)	(6.2)
Non-operating pension expense		0.4	0.2	5.6	0.5
Other expense (income), net		0.4	(3.6)	(0.4)	(2.1)
Income (loss) before income tax		13.8	21.6	(118.9)	60.3
Income tax expense		4.5	6.7	3.3	22.7
Net income (loss)		$ 9.3	$ 14.9	$ (122.2)	$ 37.6
Per share:
Basic income (loss) per share		$ 0.1	$ 0.16	$ (1.27)	$ 0.4
Diluted income (loss) per share		$ 0.09	$ 0.15	$ (1.27)	$ 0.39
Weighted average number of shares outstanding:
Basic (in shares)		96	95.4	96.2	95.2
Diluted (in shares)	[2]	97.5	96.7	96.2	96.8
[1] Operating income (loss) is defined as i) net sales; ii) less cost of products sold; iii) less selling, general and administrative expenses; iv) less amortization of intangibles; v) less restructuring; and vi) less change in the fair value of contingent consideration. As a result of the net loss for the nine months ended September 30, 2024 , diluted earnings per share does not include the effects of the stock awards for which the average market price for the period exceeds the exercised price, as their effect would have been anti-dilutive.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 9.3	$ 14.9	$ (122.2)	$ 37.6
Other comprehensive income (loss) net of tax:
Unrealized (loss) gain on derivative instruments, net of tax benefit (expense) of $0.5 and $(0.3) and $0.3 and $(0.2), respectively	(1.3)	0.7	(0.7)	0.4
Foreign currency translation adjustments, net of tax expense of $(0.4) and $(0.4) and $(0.9) and $(0.2), respectively	13.1	(7)	(23.4)	0.2
Recognition of deferred pension and other post-retirement items, net of tax benefit (expense) of $1.3 and $(1.2) and $(0.8) and $(0.6), respectively	(4.8)	4.5	1.5	2.2
Other comprehensive income (loss) net of tax:	7	(1.8)	(22.6)	2.8
Comprehensive income (loss)	$ 16.3	$ 13.1	$ (144.8)	$ 40.4

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on derivative instruments, tax benefit (expense)	$ 0.5	$ (0.3)	$ 0.3	$ (0.2)
Foreign currency translation adjustments, tax expense	(0.4)	(0.4)	(0.9)	(0.2)
Recognition of deferred pension and other post-retirement items, tax benefit (expense)	$ 1.3	$ (1.2)	$ (0.8)	$ (0.6)

Condensed Consolidated Statemen

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating activities
Net (loss) income	$ (122.2)	$ 37.6
Loss (gain) on disposal of assets	0.2	(0.3)
Depreciation	21.2	25.2
Amortization of debt issuance costs	2.2	2.3
Amortization of intangibles	33.2	32.7
Stock-based compensation	9.2	10.4
Non-cash charge for impairment of goodwill and intangible assets	165.2	0
Changes in operating assets and liabilities:
Accounts receivable	88.5	30.9
Inventories	(3.1)	35.5
Other assets	(7.6)	(5.4)
Accounts payable	1.3	(72.8)
Accrued expenses and other liabilities	(63.5)	(17.8)
Accrued income taxes	(29.1)	(7.6)
Net cash provided by operating activities	95.5	70.7
Investing activities
Additions to property, plant and equipment	(8.6)	(9.7)
Proceeds from the disposition of assets	0.1	2.2
Net cash used by investing activities	(8.5)	(7.5)
Financing activities
Proceeds from long-term borrowings	96.1	121.9
Repayments of long-term debt	(117.2)	(145.4)
Borrowings (repayments) of notes payable, net	7.5	(7.3)
Dividends paid	(21.5)	(21.4)
Repurchases of common stock	(12.5)
Payments related to tax withholding for stock-based compensation	(1.9)	(1.7)
Net cash used by financing activities	(49.5)	(53.9)
Effect of foreign exchange rate changes on cash and cash equivalents	(1.9)	2.2
Net increase in cash and cash equivalents	35.6	11.5
Cash and cash equivalents
Beginning of the period	66.4	62.2
End of the period	102	73.7
Cash paid during the year for:
Interest	43.4	48.7
Income taxes	$ 32.4	$ 30.2

Consolidated Statements of Stoc

Consolidated Statements of Stockholders’ Equity (Unaudited) - 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, 2022	$ 810.1	$ 1	$ 1,897.2	$ (43.4)	$ (540.3)	$ (504.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(3.7)					(3.7)
Gain (loss) on derivative financial instruments, net of tax	(0.9)				(0.9)
Translation impact, net of tax	8.9				8.9
Pension and post-retirement adjustment, net of tax	(1.5)				(1.5)
Stock-based compensation	5.6		6.2			(0.6)
Common stock issued, net of shares withheld for employee taxes	(1.7)			(1.7)
Dividends declared	(7.1)					(7.1)
Other	0.1		(0.1)	0.1		0.1
Balance at end of period at Mar. 31, 2023	809.8	$ 1	1,903.3	$ (45)	(533.8)	(515.7)
Balance at start of period (in shares) at Dec. 31, 2022		98.9		4.6
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock issued, net of shares withheld for employee taxes (in shares)		0.9		0.3
Balance at end of period (in shares) at Mar. 31, 2023		99.8		4.9
Balance at start of period at Dec. 31, 2022	810.1	$ 1	1,897.2	$ (43.4)	(540.3)	(504.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	37.6
Gain (loss) on derivative financial instruments, net of tax	0.4
Pension and post-retirement adjustment, net of tax	2.2
Balance at end of period at Sep. 30, 2023	$ 838	$ 1	1,908.5	$ (45.1)	(537.5)	(488.9)
Balance at start of period (in shares) at Dec. 31, 2022		98.9		4.6
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock repurchases	0
Balance at end of period (in shares) at Sep. 30, 2023		99.8		4.9
Balance at start of period at Mar. 31, 2023	$ 809.8	$ 1	1,903.3	$ (45)	(533.8)	(515.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	26.4					26.4
Gain (loss) on derivative financial instruments, net of tax	0.6				0.6
Translation impact, net of tax	(1.7)				(1.7)
Pension and post-retirement adjustment, net of tax	(0.8)				(0.8)
Stock-based compensation	3.3		3.4			(0.1)
Dividends declared	(7.1)					(7.1)
Other	(0.1)		0.1			(0.2)
Balance at end of period at Jun. 30, 2023	830.4	$ 1	1,906.8	$ (45)	(535.7)	(496.7)
Balance at start of period (in shares) at Mar. 31, 2023		99.8		4.9
Balance at end of period (in shares) at Jun. 30, 2023		99.8		4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	14.9					14.9
Gain (loss) on derivative financial instruments, net of tax	0.7				0.7
Translation impact, net of tax	(7)				(7)
Pension and post-retirement adjustment, net of tax	4.5				4.5
Stock-based compensation	1.5		1.7			(0.2)
Dividends declared	(7.2)					(7.2)
Other	0.2			$ (0.1)		0.3
Balance at end of period at Sep. 30, 2023	$ 838	$ 1	1,908.5	$ (45.1)	(537.5)	(488.9)
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock repurchases	0
Balance at end of period (in shares) at Sep. 30, 2023		99.8		4.9
Balance at start of period at Dec. 31, 2023	$ 787	$ 1	1,913.4	$ (45.1)	(526.3)	(556)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(6.3)					(6.3)
Gain (loss) on derivative financial instruments, net of tax	0.5				0.5
Translation impact, net of tax	(21.2)				(21.2)
Pension and post-retirement adjustment, net of tax	2.4				2.4
Stock-based compensation	5.1		5.4			(0.3)
Common stock issued, net of shares withheld for employee taxes	(1.9)			(1.9)
Dividends declared	(7.2)					(7.2)
Other	0.1					0.1
Balance at end of period at Mar. 31, 2024	758.5	$ 1	1,918.8	$ (47)	(544.6)	(569.7)
Balance at start of period (in shares) at Dec. 31, 2023		99.8		4.9
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock issued, net of shares withheld for employee taxes (in shares)		1.1		0.3
Balance at end of period (in shares) at Mar. 31, 2024		100.9		5.2
Balance at start of period at Dec. 31, 2023	787	$ 1	1,913.4	$ (45.1)	(526.3)	(556)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(122.2)
Gain (loss) on derivative financial instruments, net of tax	(0.7)
Pension and post-retirement adjustment, net of tax	1.5
Balance at end of period at Sep. 30, 2024	$ 615.5	$ 1	1,911.1	$ (47)	(548.9)	(700.7)
Balance at start of period (in shares) at Dec. 31, 2023		99.8		4.9
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock repurchases	(2,400,000)
Balance at end of period (in shares) at Sep. 30, 2024		98.6		5.2
Balance at start of period at Mar. 31, 2024	$ 758.5	$ 1	1,918.8	$ (47)	(544.6)	(569.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(125.2)					(125.2)
Gain (loss) on derivative financial instruments, net of tax	0.1				0.1
Translation impact, net of tax	(15.3)				(15.3)
Pension and post-retirement adjustment, net of tax	3.9				3.9
Stock-based compensation	2.5		2.9			(0.4)
Dividends declared	(7.1)					(7.1)
Other	(0.3)					(0.3)
Balance at end of period at Jun. 30, 2024	617.1	$ 1	1,921.7	$ (47)	(555.9)	(702.7)
Balance at start of period (in shares) at Mar. 31, 2024		100.9		5.2
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock issued, net of shares withheld for employee taxes (in shares)		0.1
Balance at end of period (in shares) at Jun. 30, 2024		101		5.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	9.3					9.3
Gain (loss) on derivative financial instruments, net of tax	(1.3)				(1.3)
Translation impact, net of tax	13.1				13.1
Pension and post-retirement adjustment, net of tax	(4.8)				(4.8)
Common stock repurchases	(12.5)		(12.5)
Stock-based compensation	1.6		1.9			(0.3)
Dividends declared	(7.2)					(7.2)
Other	0.2					0.2
Balance at end of period at Sep. 30, 2024	$ 615.5	$ 1	$ 1,911.1	$ (47)	$ (548.9)	$ (700.7)
Increase (Decrease) In Capital Stock [Roll Forward]
Common stock repurchases	(2,400,000)	(2.4)
Balance at end of period (in shares) at Sep. 30, 2024		98.6		5.2

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Common stock, dividends per share, declared	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 9.3	$ (125.2)	$ (6.3)	$ 14.9	$ 26.4	$ (3.7)	$ (122.2)	$ 37.6

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	During the three months ended September 30, 2024 , no director or officer of the Company who is required to file reports under Section 16 of the Exchange Act informed us that he or she adopted , materially modified or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.
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
Rule10B51ArrModifiedFlag	false
NonRule10B51ArrModifiedFlag	false

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1 . Basis of Presentation As used in this Quarterly Report on Form 10-Q for the quarter ended September 30, 2024, the terms "ACCO Brands," "ACCO," the "Company," "we," "us," and "our" refer to ACCO Brands Corporation and its consolidated subsidiaries. The management of ACCO Brands Corporation is responsible for the accuracy and internal consistency of the preparation of the condensed consolidated financial statements and notes contained in this Quarterly Report on Form 10-Q. The condensed consolidated interim financial statements have been prepared pursuant to the rules and regulations of the SEC. Although the Company believes the disclosures are adequate to make the information presented not misleading, certain information and note disclosures normally included in annual financial statements prepared in accordance with generally accepted accounting principles in the U.S. ("GAAP") have been condensed or omitted pursuant to those rules and regulations. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The Condensed Consolidated Balance Sheet as of September 30, 2024 and the related Consolidated Statements of Income (Loss), Consolidated Statements of Comprehensive Income (Loss), and Consolidated Statements of Stockholders' Equity for the three and nine months ended September 30, 2024 and 2023, and the Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2024 and 2023 are unaudited. The December 31, 2023 Condensed Consolidated Balance Sheet data was derived from audited financial statements but does not include all annual disclosures required by GAAP. The financial statements included herein were prepared by management and reflect all adjustments (consisting solely of normal recurring items unless otherwise noted) which are, in the opinion of management, necessary for the fair presentation of the results of operations and cash flows for the interim periods ended September 30, 2024 and 2023, and the financial position of the Company as of September 30, 2024. Interim results may not be indicative of results for a full year. Effective January 1, 2024, the Company reorganized its previously reported North America, EMEA and International operating segments into two operating segments, 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 16. Information on Business Segments" for further details. The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported assets and liabilities at the date of the financial statements and the reported revenues and expenses during the reporting periods. Actual results could differ from those estimates.

Recent Accounting Pronouncement

Recent Accounting Pronouncements and Adopted Accounting Standards	9 Months Ended
	Sep. 30, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements and Adopted Accounting Standards	2 . Recent Accounting Pronouncements and Adopted Accounting Standards Recent Accounting Pronouncements In November 2023, the Financial Accounting Standards Board ("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. This ASU is effective for annual periods beginning after December 15, 2023, and for interim periods beginning after December 15, 2024, with early adoption permitted. We are evaluating the effect this guidance will have on our segment disclosures. 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 There were no accounting standards that were adopted in the first nine months of 2024 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	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Long-term Debt and Short-term Borrowings	4.50 to 1.00 2.50 % 1.50 % 0.500 % ≤ 4.50 to 1.00 and > 4.00 to 1.00 2.25 % 1.25 % 0.375 % ≤ 4.00 to 1.00 and > 3.50 to 1.00 2.00 % 1.00 % 0.350 % ≤ 3.50 to 1.00 and > 3.00 to 1.00 1.75 % 0.75 % 0.300 % ≤ 3.00 to 1.00 and > 2.00 to 1.00 1.50 % 0.50 % 0.250 % ≤ 2.00 to 1.00 1.25 % 0.25 % 0.200 % As of September 30, 2024, there were $ 22.5 million in borrowings outstanding under the Revolving Facility. The remaining amount available for borrowings was $ 569.0 million (allowing for $ 8.5 million of letters of credit outstanding on that date). As of September 30, 2024, our Consolidated Leverage Ratio was approximately 3.50 to 1.00 versus our maximum covenant of 4.00 to 1.00. On October 30, 2024, the Company entered into a seventh amendment to the Credit Agreement to extend the maturity of the senior secured credit facility to October 30, 2029 . The following are the key changes, among other things, to the Credit Agreement as a result of the seventh amendment: • the current Revolving Facility provides for outstanding borrowings not to exceed $ 467.5 million; • the outstanding USD Senior Secured Term Loan A of $ 72.8 million as well as the Australian Dollar Senior Secured Term Loan A of A$ 44.4 million (US$ 29.2 million based on October 30, 2024 exchange rates) were repaid in full by borrowing under the Revolving Facility; • € 61.2 million (US$ 66.4 million based on October 30, 2024 exchange rates) out of the total outstanding Euro Senior Secured Term Loan A of € 184.1 million (US$ 199.8 million based on October 30, 2024 exchange rates) was repaid by borrowing under the Revolving Facility; and • added a springing maturity covenant if the Senior Unsecured Notes are not refinanced before their maturity of March 15, 2029. No changes were made to the financial covenants and the pricing was updated as follows: Level Consolidated Leverage Ratio SOFR Spread Undrawn Fee I > 4.25x 225 bps 37.5 bps II > 3.50x 200 bps 35.0 bps III > 2.50x 175 bps 30.0 bps IV ≤ 2.50x 150 bps 25.0 bps Senior Unsecured Notes On March 15, 2021, the Company completed a private offering of $ 575.0 million in aggregate principal amount of 4.25 percent Senior Unsecured Notes (the "Notes") due March 2029. Interest on the Notes is payable semiannually on March 15 and September 15 of each year. The Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by each of the Company's existing and future U.S. subsidiaries, other than certain excluded subsidiaries. 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." 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 September 30, 2024 and December 31, 2023: (in millions) September 30, December 31, Euro Senior Secured Term Loan A, due March 2026 (floating interest rate of 5.35 % at September 30, 2024 and 5.93 % at December 31, 2023) $ 205.5 $ 218.2 USD Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.94 % at September 30, 2024 and 7.50 % at December 31, 2023) 72.8 78.0 Australian Dollar Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.48 % at September 30, 2024 and 6.42 % at December 31, 2023) 30.7 32.5 U.S. Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.94 % at September 30, 2024 and 7.4 % at December 31, 2023) 13.5 7.3 Australian Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.40 % at September 30, 2024 and 6.42 % at December 31, 2023) 9.0 14.3 Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25 %) 575.0 575.0 Other borrowings 7.9 0.3 Total debt 914.4 925.6 Less: Current portion 59.2 36.7 Debt issuance costs, unamortized 5.4 6.7 Long-term debt, net $ 849.8 $ 882.2 Credit Agreement The Company is party to a Third Amended and Restated Credit Agreement (the "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. The Credit Agreement, as amended, provides for a senior secured credit facility, which consists 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 "Revolving Facility"). From July 2018 to November 2022, the Company entered into six amendments (the "Amendments") to the Credit Agreement. The following are the key changes, among other things, to the Credit Agreement as a result of the Amendments: • replace the minimum fixed coverage ratio of 1.25 :1.00 with a minimum Interest Coverage Ratio (as defined in the Credit Agreement) of 3.00 :1.00; • increase the maximum Consolidated Leverage Ratio (as defined in the Credit Agreement) financial covenant for each of the five fiscal quarters beginning December 31, 2022, and ending December 31, 2023; • modify the maximum Consolidated Leverage Ratio financial covenant for all first and second fiscal quarters after December 31, 2023, from the current level of 4.00x to 4.50x, while maintaining the current level of 4.00x for all third and fourth fiscal quarters; • increase the Company’s flexibility under the restricted payments baskets; and • change the U.S. dollar reference rate from LIBOR-based pricing to SOFR-based pricing, with no changes to existing margins. As of September 30, 2024, the maturity of the Credit Agreement was March 31, 2026 and the pricing was as follows: Consolidated Leverage Ratio Applicable Rate on Euro/AUD/CDN Dollar Loans Applicable Rate on Base Rate Loans Undrawn Fee > 4.50 to 1.00 2.50 % 1.50 % 0.500 % ≤ 4.50 to 1.00 and > 4.00 to 1.00 2.25 % 1.25 % 0.375 % ≤ 4.00 to 1.00 and > 3.50 to 1.00 2.00 % 1.00 % 0.350 % ≤ 3.50 to 1.00 and > 3.00 to 1.00 1.75 % 0.75 % 0.300 % ≤ 3.00 to 1.00 and > 2.00 to 1.00 1.50 % 0.50 % 0.250 % ≤ 2.00 to 1.00 1.25 % 0.25 % 0.200 % As of September 30, 2024, there were $ 22.5 million in borrowings outstanding under the Revolving Facility. The remaining amount available for borrowings was $ 569.0 million (allowing for $ 8.5 million of letters of credit outstanding on that date). As of September 30, 2024, our Consolidated Leverage Ratio was approximately 3.50 to 1.00 versus our maximum covenant of 4.00 to 1.00. On October 30, 2024, the Company entered into a seventh amendment to the Credit Agreement to extend the maturity of the senior secured credit facility to October 30, 2029 . The following are the key changes, among other things, to the Credit Agreement as a result of the seventh amendment: • the current Revolving Facility provides for outstanding borrowings not to exceed $ 467.5 million; • the outstanding USD Senior Secured Term Loan A of $ 72.8 million as well as the Australian Dollar Senior Secured Term Loan A of A$ 44.4 million (US$ 29.2 million based on October 30, 2024 exchange rates) were repaid in full by borrowing under the Revolving Facility; • € 61.2 million (US$ 66.4 million based on October 30, 2024 exchange rates) out of the total outstanding Euro Senior Secured Term Loan A of € 184.1 million (US$ 199.8 million based on October 30, 2024 exchange rates) was repaid by borrowing under the Revolving Facility; and • added a springing maturity covenant if the Senior Unsecured Notes are not refinanced before their maturity of March 15, 2029. No changes were made to the financial covenants and the pricing was updated as follows: Level Consolidated Leverage Ratio SOFR Spread Undrawn Fee I > 4.25x 225 bps 37.5 bps II > 3.50x 200 bps 35.0 bps III > 2.50x 175 bps 30.0 bps IV ≤ 2.50x 150 bps 25.0 bps Senior Unsecured Notes On March 15, 2021, the Company completed a private offering of $ 575.0 million in aggregate principal amount of 4.25 percent Senior Unsecured Notes (the "Notes") due March 2029. Interest on the Notes is payable semiannually on March 15 and September 15 of each year. The Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by each of the Company's existing and future U.S. subsidiaries, other than certain excluded subsidiaries. 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.

Leases

Leases	9 Months Ended
	Sep. 30, 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 Condensed 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. Because most of the Company’s leases do not provide an implicit rate of return, the Company uses its incremental collateralized borrowing rate, on a regional basis, in determining the present value of lease payments. 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 were as follows: Three months ended Nine Months Ended (in millions) 2024 2023 2024 2023 Operating lease cost $ 7.2 $ 7.3 $ 21.8 $ 21.4 Sublease income ( 0.8 ) ( 0.6 ) ( 2.4 ) ( 1.9 ) Total lease cost $ 6.4 $ 6.7 $ 19.4 $ 19.5 Other information related to leases was as follows: Nine 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 $ 20.8 $ 22.6 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 14.4 $ 14.7 Weighted average remaining lease term: Operating leases 5.8 years Weighted average discount rate: Operating leases 5.2 % Future minimum lease payments, net of sublease income, for all non-cancelable leases as of September 30, 2024 were as follows: (in millions) Operating 2024 $ 7.1 2025 25.2 2026 20.6 2027 15.3 2028 12.8 2029 10.1 Thereafter 18.1 Total minimum lease payments 109.2 Less imputed interest 15.6 Future minimum payments for leases, net of sublease rental income and imputed interest $ 93.6

Pension and Other Retiree Benef

Pension and Other Retiree Benefits	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Pension and Other Retiree Benefits	5 . Pension and Other Retiree Benefits The components of net periodic benefit (income) cost for pension and post-retirement plans for the three and nine months ended September 30, 2024 and 2023 were as follows: Three Months Ended September 30, Pension Post-retirement U.S. International (in millions) 2024 2023 2024 2023 2024 2023 Service cost $ — $ — $ 0.1 $ 0.1 $ — $ — Interest cost 1.9 2.0 4.6 5.1 — — Expected return on plan assets ( 3.2 ) ( 3.0 ) ( 4.9 ) ( 5.5 ) — — Amortization of net loss (gain) 0.6 0.6 1.4 1.1 ( 0.1 ) ( 0.1 ) Amortization of prior service cost — — 0.1 0.1 — — Net periodic benefit (income) cost (2) $ ( 0.7 ) $ ( 0.4 ) $ 1.3 $ 0.9 $ ( 0.1 ) $ ( 0.1 ) Nine Months Ended September 30, Pension Post-retirement U.S. International (in millions) 2024 2023 2024 2023 2024 2023 Service cost $ — $ — $ 0.5 $ 0.3 $ — $ — Interest cost 5.7 6.0 13.8 15.0 — — Expected return on plan assets ( 9.6 ) ( 9.0 ) ( 14.6 ) ( 16.2 ) — — Amortization of net loss (gain) 1.8 1.8 4.0 3.2 ( 0.3 ) ( 0.3 ) Amortization of prior service cost — — 0.2 0.3 — — Settlement (1) — — 4.4 — — — Net periodic benefit (income) cost (2) $ ( 2.1 ) $ ( 1.2 ) $ 8.3 $ 2.6 $ ( 0.3 ) $ ( 0.3 ) (1) Settlement of $ 4.4 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans which was completed in the second quarter of 2024. (2) The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense" in the Consolidated Statements of Income (Loss) . We expect to contribute approximately $ 17.7 million to our defined benefit plans in 2024. For the nine months ended September 30, 2024, we have contributed $ 11.8 million to these plans.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	6 . Stock-Based Compensation The following table summarizes our stock-based compensation expense (including stock options, restricted stock units ("RSUs") and performance stock units ("PSUs") for the three and nine months ended September 30, 2024 and 2023: Three months ended Nine Months Ended (in millions) 2024 2023 2024 2023 Stock option compensation expense $ 0.1 $ 0.3 $ 0.4 $ 2.4 RSU compensation expense 1.3 1.3 6.3 4.9 PSU compensation expense 0.2 ( 0.1 ) 2.5 3.1 Total stock-based compensation expense $ 1.6 $ 1.5 $ 9.2 $ 10.4 The following table summarizes our unrecognized compensation expense and the weighted-average period over which the expense will be recognized as of September 30, 2024: September 30, 2024 (in millions, except weighted average years) Unrecognized Compensation Expense Weighted Average Years Expense To Be Recognized Over Stock options $ 0.2 0.5 RSUs $ 8.4 2.1 PSUs $ 4.5 1.7

Inventories

Inventories	9 Months Ended
	Sep. 30, 2024
Inventory Disclosure [Abstract]
Inventories	7 . Inventories The components of inventories were as follows: (in millions) September 30, 2024 December 31, 2023 Raw materials $ 39.4 $ 50.1 Work in process 4.3 4.7 Finished goods 281.1 272.7 Total inventories $ 324.8 $ 327.5

Goodwill and Identifiable Intan

Goodwill and Identifiable Intangible Assets	9 Months Ended
	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Identifiable Intangible Assets	8 . 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, 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 two 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 the uncertainties regarding the 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. 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, 2023 $ 383.6 $ 206.4 $ 590.0 Goodwill impairment ( 127.5 ) — ( 127.5 ) Foreign currency translation ( 1.5 ) ( 2.0 ) ( 3.5 ) Balance at September 30, 2024 $ 254.6 $ 204.4 $ 459.0 The goodwill balance includes $ 403.3 million and $ 530.8 million of accumulated impairment losses as of December 31, 2023 and September 30, 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, 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 three 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 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 gross carrying value and accumulated amortization by class of identifiable intangible assets as of September 30, 2024 and December 31, 2023, were as follows: September 30, 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) $ 101.2 $ ( 44.5 ) $ 56.7 $ 295.1 $ ( 44.5 ) $ 250.6 Amortizable intangible assets: Trade names (2) 648.5 ( 156.0 ) 492.5 497.1 ( 142.0 ) 355.1 Customer and contractual relationships 362.7 ( 235.0 ) 127.7 362.4 ( 221.3 ) 141.1 Vendor relationships 82.4 ( 20.8 ) 61.6 82.4 ( 16.7 ) 65.7 Patents 8.2 ( 5.8 ) 2.4 8.2 ( 5.0 ) 3.2 Subtotal 1,101.8 ( 417.6 ) 684.2 950.1 ( 385.0 ) 565.1 Total identifiable intangibles $ 1,203.0 $ ( 462.1 ) $ 740.9 $ 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 two indefinite-lived trade names from indefinite-lived intangibles to amortizable intangible assets as of June 1, 2024. The Company's intangible amortization expense for the three and nine months ended September 30, 2024 was $ 11.7 million and $ 33.2 million , respectively, and $ 10.8 million and $ 32.7 million for the three and nine months ended September 30, 2023, respectively. Estimated amortization expense for amortizable intangible assets, as of September 30, 2024, for the current year and the next five years is as follows: (in millions) 2024 2025 2026 2027 2028 2029 Estimated amortization expense (3) $ 45.1 $ 45.7 $ 43.6 $ 41.2 $ 39.0 $ 37.2 (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	9 Months Ended
	Sep. 30, 2024
Restructuring and Related Activities [Abstract]
Restructuring	9 . Restructuring The Company recorded $ 6.7 million and $ 6.1 million of net restructuring expense for the three and nine months ended September 30, 2024, respectively, which were primarily for severance costs related to cost reduction initiatives in both the Americas and International segments. The Company recorded $ 3.0 million and $ 6.3 million of restructuring expense for the three and nine months ended September 30, 2023, respectively, which were primarily related to severance costs associated with the footprint rationalization program in the International segment. The summary of the activity in the restructuring liability for the nine months ended September 30, 2024 was as follows: (in millions) Balance at December 31, 2023 Provision Cash Expenditures Non-cash Items/Currency Change Balance at September 30, 2024 Employee termination costs (1) $ 27.5 $ 6.1 $ ( 11.4 ) $ ( 0.1 ) $ 22.1 Other 0.9 — ( 0.9 ) — 0.0 Total restructuring liability $ 28.4 $ 6.1 $ ( 12.3 ) $ ( 0.1 ) $ 22.1 (1) We expect the remaining $ 22.1 million employee termination costs to be substantially paid in the next twelve months . The summary of the activity in the restructuring liability for the nine months ended September 30, 2023 was as follows: (in millions) Balance at December 31, 2022 Provision Cash Expenditures Non-cash Items/Currency Change Balance at September 30, 2023 Employee termination costs $ 8.7 $ 4.9 $ ( 6.9 ) $ — $ 6.7 Other — 1.4 ( 0.2 ) — 1.2 Total restructuring liability $ 8.7 $ 6.3 $ ( 7.1 ) $ — $ 7.9

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	10 . Income Taxes For the three months ended September 30, 2024, we recorded income tax expense of $ 4.5 million on income before taxes of $ 13.8 million . For the three months ended September 30, 2023, we recorded income tax expense of $ 6.7 million on income before taxes of $ 21.6 million . The $ 2.2 million decrease in tax expense compared to the three months ended September 30, 2023 was primarily driven by the decrease in income before taxes during the three months ended September 30, 2024. For the nine months ended September 30, 2024, we recorded income tax expense of $ 3.3 million on a loss before taxes of $ 118.9 million . For the nine months ended September 30, 2023, we recorded income tax expense of $ 22.7 million on income before taxes of $ 60.3 million . The $ 19.4 million decrease in tax expense was primarily driven by the tax benefits related to the impairment of indefinite-lived intangibles and the settlement of certain pension plans. In addition, there were changes to uncertain tax positions based on the statutes of limitations and Brazilian income tax refunded related to certain interest income generated. Income before taxes during the nine months ended September 30, 2024 was lower also driving a decrease in tax expense. The non-cash goodwill impairment charge of $ 127.5 million had no associated tax benefit. The U.S. federal statute of limitations remains open for the years 2020 and forward. Foreign and U.S. state jurisdictions have statutes of limitations generally ranging from 2 to 6 years. Years still open to examination by foreign tax authorities in major jurisdictions include Australia ( 2020 forward ), Brazil ( 2019 forward ), Canada ( 2020 forward ), Germany ( 2020 forward ), Sweden ( 2022 forward ) and the U.K. ( 2022 forward ). We are currently under examination in certain foreign and U.S. 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 applied on a country-by-country basis and for which many jurisdictions have now committed to an effective enactment date starting January 1, 2024. Management is currently assessing 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 its operating entity in Brazil ("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 the 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 at any time in the next twelve to eighteen months. 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 these disputes 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 a 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 nine months ended September 30, 2024 and 2023, we accrued additional interest as a charge to current income tax expense of $ 0.5 million and $ 1.3 million, respectively. At current exchange rates, our accrual as of September 30, 2024, including tax, penalties and interest is $ 20.0 million (reported in "Other non-current liabilities").

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Earnings per Share	11 . Earnings per Share Total outstanding shares as of September 30, 2024 and 2023, were 93.4 million and 94.9 million , respectively. Under our stock repurchase program, during each of the three and nine months ended September 30, 2024, we repurchased and retired 2.4 million shares, and during the three and nine months ended September 30, 2023 , we did no t repurchase or retire any shares. For each of the nine months ended September 30, 2024 and 2023, we acquired 0.4 million and 0.3 million shares, respectively, related to tax withholding for share-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. Our calculation of diluted earnings per share of common stock assumes that any shares of common stock outstanding were 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 number of shares outstanding for the three and nine months ended September 30, 2024 and 2023 was as follows: Three months ended September 30, Nine Months Ended September 30, (in millions) 2024 2023 2024 2023 Weighted-average number of shares of common stock outstanding - basic 96.0 95.4 96.2 95.2 Effect of dilutive securities: Restricted stock units 1.5 1.3 — 1.6 Weighted-average shares and assumed conversions - diluted (1) 97.5 96.7 96.2 96.8 (1) As a result of the net loss for the nine months ended September 30, 2024 , diluted earnings per share does not include the effects of the stock awards for which the average market price for the period exceeds the exercised price, as their effect would have been anti-dilutive. 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 three and nine months ended September 30, 2024, the number of anti-dilutive shares was approximately 10.0 million and 10.2 million , respectively. For the three and nine months ended September 30, 2023, the number of anti-dilutive shares was approximately 10.4 million and 9.8 million , respectively.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	12 . 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 Accumulated Other Comprehensive Income (Loss) ("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 (Loss). As of September 30, 2024 and December 31, 2023, we had cash flow foreign exchange contracts outstanding with a U.S. dollar equivalent notional value of $ 99.5 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 (income) expense, net" in the Consolidated Statements of Income (Loss) 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 September 2025. As of September 30, 2024 and December 31, 2023, we had foreign exchange contracts outstanding with a U.S. dollar equivalent notional value of $ 108.7 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 September 30, 2024 and December 31, 2023: Fair Value of Derivative Instruments Derivative Assets Derivative Liabilities (in millions) Balance Sheet Location September 30, December 31, Balance Sheet Location September 30, December 31, Derivatives designated as hedging instruments: Foreign exchange contracts Other current assets $ 0.2 $ 0.3 Other current liabilities $ 2.3 $ 1.6 Derivatives not designated as hedging instruments: Foreign exchange contracts Other current assets 0.9 1.0 Other current liabilities 0.3 0.1 Foreign exchange contracts Other non-current assets 4.9 3.2 Other non-current liabilities 4.9 3.2 Total derivatives $ 6.0 $ 4.5 $ 7.5 $ 4.9 The following tables summarize the pre-tax effect of our derivative financial instruments on the condensed consolidated financial statements for the three and nine months ended September 30, 2024 and 2023: 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) Three months ended September 30, Three months ended September 30, (in millions) 2024 2023 2024 2023 Cash flow hedges: Foreign exchange contracts $ ( 2.0 ) $ 1.5 Cost of products sold $ 0.3 $ ( 0.6 ) 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) Nine months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 Cash flow hedges: Foreign exchange contracts $ ( 0.4 ) $ 1.9 Cost of products sold $ ( 0.6 ) $ ( 1.4 ) 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 Amount of (Gain) Loss Recognized in Income Three months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 Foreign exchange contracts Other expense (income), net $ 1.1 $ ( 3.1 ) $ ( 1.0 ) $ ( 0.1 )

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	13 . 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 12 . 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 September 30, 2024 and December 31, 2023: (in millions) September 30, December 31, Assets: Forward currency contracts $ 6.0 $ 4.5 Liabilities: Forward currency contracts $ 7.5 $ 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 $ 914.4 million and $ 925.6 million and the estimated fair value of total debt was $ 874.9 million and $ 870.9 million at September 30, 2024 and December 31, 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. Nonrecurring Fair Value Measurements On a nonrecurring basis, we remeasure the fair value of the goodwill of our reporting units and 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 8 . Goodwill and Identifiable Intangible Assets" for more information.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	14 . 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, 2023 $ ( 0.7 ) $ ( 349.8 ) $ ( 175.8 ) $ ( 526.3 ) Other comprehensive loss before reclassifications, net of tax ( 0.3 ) ( 23.4 ) ( 5.5 ) ( 29.2 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax ( 0.4 ) — 7.0 6.6 Balance at September 30, 2024 $ ( 1.4 ) $ ( 373.2 ) $ ( 174.3 ) $ ( 548.9 ) The reclassifications out of AOCI for the three and nine months ended September 30, 2024 and 2023 were as follows: Three months ended Nine months ended September 30, (in millions) 2024 2023 2024 2023 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Location on Income Statement Gain (loss) on cash flow hedges: Foreign exchange contracts $ ( 0.3 ) $ 0.6 $ 0.6 $ 1.4 Cost of products sold Tax expense (benefit) 0.1 ( 0.2 ) ( 0.2 ) ( 0.4 ) Income tax expense Net of tax $ ( 0.2 ) $ 0.4 $ 0.4 $ 1.0 Defined benefit plan items: Amortization of net actuarial loss (1) $ ( 1.9 ) $ ( 1.6 ) $ ( 9.1 ) $ ( 4.7 ) Amortization of prior service cost (1) ( 0.1 ) ( 0.1 ) ( 0.2 ) ( 0.3 ) Total before tax ( 2.0 ) ( 1.7 ) ( 9.3 ) ( 5.0 ) Tax benefit 0.5 0.6 2.3 1.5 Income tax expense Net of tax $ ( 1.5 ) $ ( 1.1 ) $ ( 7.0 ) $ ( 3.5 ) Total reclassifications for the period, net of tax $ ( 1.7 ) $ ( 0.7 ) $ ( 6.6 ) $ ( 2.5 ) (1) These AOCI components are included in the computation of net periodic benefit (income) cost for pension and post-retirement plans including $ 3.6 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans in the second quarter of 2024. See "Note 5 . Pension and Other Retiree Benefits" for additional details.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition	15 . 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. 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. 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 three and nine months ended September 30, 2024 , $ 0.4 million and $ 2.2 million of the unearned revenue was earned and recognized. As of September 30, 2024 , the amount of unearned revenue from EMAs was $ 3.1 million. We expect to earn and recognize approximately $ 2.6 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, by reporting business segments and our net sales disaggregated by the timing of revenue recognition for the three and nine months ended September 30, 2024 and 2023: Three months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 United States $ 189.8 $ 195.0 $ 552.0 $ 613.1 Canada 23.7 25.3 71.1 78.6 Latin America 45.6 64.1 125.5 159.1 ACCO Brands Americas 259.1 284.4 748.6 850.8 EMEA (1) 125.5 126.6 370.2 388.1 Australia/N.Z. 28.6 29.7 76.9 82.1 Asia 7.7 7.3 22.4 23.2 ACCO Brands International 161.8 163.6 469.5 493.4 Net sales (2) $ 420.9 $ 448.0 $ 1,218.1 $ 1,344.2 (1) 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. Three months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 Product and services transferred at a point in time $ 416.3 $ 439.8 $ 1,195.0 $ 1,313.2 Product and services transferred over time 4.6 8.2 23.1 31.0 Net sales $ 420.9 $ 448.0 $ 1,218.1 $ 1,344.2

Information on Business Segment

Information on Business Segments	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Information on Business Segments	16 . Information on Business Segments Effective January 1, 2024, the Company reorganized its previously reported North America, EMEA and International operating segments into two operating segments, Americas and International. The Americas includes the U.S., Canada, Brazil, Mexico and Chile, and International includes EMEA, Australia, New Zealand and Asia. The new organizational structure aligns with how the Chief Operating Decision Maker ("CODM") analyzes and evaluates the Company's performance. This change will simplify and delayer the Company's operating structure and reduce costs through headcount reductions, supply chain optimization, global footprint rationalization, and better leverage of our sourcing capabilities. Prior period results have been reclassified to reflect this change in our operating segments. The Company's two 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. 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, technology distributors, discount, drug/grocery and variety chains, warehouse clubs, hardware and specialty stores, independent office product dealers, office superstores, wholesalers, and contract stationers. We also sell directly through e-commerce sites and our direct sales organization. Net sales by reportable business segment for the three and nine months ended September 30, 2024 and 2023 were as follows: Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2024 2023 2024 2023 ACCO Brands Americas $ 259.1 $ 284.4 $ 748.6 $ 850.8 ACCO Brands International 161.8 163.6 469.5 493.4 Net sales $ 420.9 $ 448.0 $ 1,218.1 $ 1,344.2 Operating income (loss) by business segment for the three and nine months ended September 30, 2024 and 2023 was as follows: Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2024 2023 2024 2023 ACCO Brands Americas $ 25.9 $ 33.8 $ ( 76.7 ) $ 106.5 ACCO Brands International 9.5 9.4 30.1 26.2 Segment operating income (loss) 35.4 43.2 ( 46.6 ) 132.7 Corporate ( 9.1 ) ( 11.0 ) ( 32.4 ) ( 35.2 ) Operating income (loss)⁽¹⁾ 26.3 32.2 ( 79.0 ) 97.5 Interest expense 13.7 15.6 40.8 45.0 Interest income ( 2.0 ) ( 1.6 ) ( 6.1 ) ( 6.2 ) Non-operating pension expense 0.4 0.2 5.6 0.5 Other expense (income), net 0.4 ( 3.6 ) ( 0.4 ) ( 2.1 ) Income (loss) before income tax $ 13.8 $ 21.6 $ ( 118.9 ) $ 60.3 (1) Operating income (loss) is defined as i) net sales; ii) less cost of products sold; iii) less selling, general and administrative expenses; iv) less amortization of intangibles; v) less restructuring; and vi) less change in the fair value of contingent consideration.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	17 . 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 10. 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. During the nine months ended September 30, 2024 , ACCO Brazil completed the necessary administrative steps which allowed it to benefit from additional Tax Credits and record a gain of $ 1.9 million, which is included in "Other (income) expense, net," on our Consolidated Statements of Income (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 applicable statute 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 nine months ended September 30, 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.

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements and Adopted Accounting Standards (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In November 2023, the Financial Accounting Standards Board ("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. This ASU is effective for annual periods beginning after December 15, 2023, and for interim periods beginning after December 15, 2024, with early adoption permitted. We are evaluating the effect this guidance will have on our segment disclosures. 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 There were no accounting standards that were adopted in the first nine months of 2024 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 Condensed 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. Because most of the Company’s leases do not provide an implicit rate of return, the Company uses its incremental collateralized borrowing rate, on a regional basis, in determining the present value of lease payments. 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.

Long-term Debt and Short-term_2

Long-term Debt and Short-term Borrowings (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2024 and December 31, 2023: (in millions) September 30, December 31, Euro Senior Secured Term Loan A, due March 2026 (floating interest rate of 5.35 % at September 30, 2024 and 5.93 % at December 31, 2023) $ 205.5 $ 218.2 USD Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.94 % at September 30, 2024 and 7.50 % at December 31, 2023) 72.8 78.0 Australian Dollar Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.48 % at September 30, 2024 and 6.42 % at December 31, 2023) 30.7 32.5 U.S. Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.94 % at September 30, 2024 and 7.4 % at December 31, 2023) 13.5 7.3 Australian Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.40 % at September 30, 2024 and 6.42 % at December 31, 2023) 9.0 14.3 Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25 %) 575.0 575.0 Other borrowings 7.9 0.3 Total debt 914.4 925.6 Less: Current portion 59.2 36.7 Debt issuance costs, unamortized 5.4 6.7 Long-term debt, net $ 849.8 $ 882.2
Schedule of Applicable Rate and Undrawn Fee Based on Company's Consolidated Leverage Ratio	As of September 30, 2024, the maturity of the Credit Agreement was March 31, 2026 and the pricing was as follows: Consolidated Leverage Ratio Applicable Rate on Euro/AUD/CDN Dollar Loans Applicable Rate on Base Rate Loans Undrawn Fee > 4.50 to 1.00 2.50 % 1.50 % 0.500 % ≤ 4.50 to 1.00 and > 4.00 to 1.00 2.25 % 1.25 % 0.375 % ≤ 4.00 to 1.00 and > 3.50 to 1.00 2.00 % 1.00 % 0.350 % ≤ 3.50 to 1.00 and > 3.00 to 1.00 1.75 % 0.75 % 0.300 % ≤ 3.00 to 1.00 and > 2.00 to 1.00 1.50 % 0.50 % 0.250 % ≤ 2.00 to 1.00 1.25 % 0.25 % 0.200 %
Summary of Financial Covenants and Pricing	No changes were made to the financial covenants and the pricing was updated as follows: Level Consolidated Leverage Ratio SOFR Spread Undrawn Fee I > 4.25x 225 bps 37.5 bps II > 3.50x 200 bps 35.0 bps III > 2.50x 175 bps 30.0 bps IV ≤ 2.50x 150 bps 25.0 bps

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2024
Leases [Abstract]
Components of Lease Expense and Other Information	The components of lease expense were as follows: Three months ended Nine Months Ended (in millions) 2024 2023 2024 2023 Operating lease cost $ 7.2 $ 7.3 $ 21.8 $ 21.4 Sublease income ( 0.8 ) ( 0.6 ) ( 2.4 ) ( 1.9 ) Total lease cost $ 6.4 $ 6.7 $ 19.4 $ 19.5 Other information related to leases was as follows: Nine 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 $ 20.8 $ 22.6 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 14.4 $ 14.7 Weighted average remaining lease term: Operating leases 5.8 years Weighted average discount rate: Operating leases 5.2 %
Schedule of Future Minimum Lease Payments, Net of Sublease Income	Future minimum lease payments, net of sublease income, for all non-cancelable leases as of September 30, 2024 were as follows: (in millions) Operating 2024 $ 7.1 2025 25.2 2026 20.6 2027 15.3 2028 12.8 2029 10.1 Thereafter 18.1 Total minimum lease payments 109.2 Less imputed interest 15.6 Future minimum payments for leases, net of sublease rental income and imputed interest $ 93.6

Pension and Other Retiree Ben_2

Pension and Other Retiree Benefits (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Cost for Pension and Post-Retirement Plans	The components of net periodic benefit (income) cost for pension and post-retirement plans for the three and nine months ended September 30, 2024 and 2023 were as follows: Three Months Ended September 30, Pension Post-retirement U.S. International (in millions) 2024 2023 2024 2023 2024 2023 Service cost $ — $ — $ 0.1 $ 0.1 $ — $ — Interest cost 1.9 2.0 4.6 5.1 — — Expected return on plan assets ( 3.2 ) ( 3.0 ) ( 4.9 ) ( 5.5 ) — — Amortization of net loss (gain) 0.6 0.6 1.4 1.1 ( 0.1 ) ( 0.1 ) Amortization of prior service cost — — 0.1 0.1 — — Net periodic benefit (income) cost (2) $ ( 0.7 ) $ ( 0.4 ) $ 1.3 $ 0.9 $ ( 0.1 ) $ ( 0.1 ) Nine Months Ended September 30, Pension Post-retirement U.S. International (in millions) 2024 2023 2024 2023 2024 2023 Service cost $ — $ — $ 0.5 $ 0.3 $ — $ — Interest cost 5.7 6.0 13.8 15.0 — — Expected return on plan assets ( 9.6 ) ( 9.0 ) ( 14.6 ) ( 16.2 ) — — Amortization of net loss (gain) 1.8 1.8 4.0 3.2 ( 0.3 ) ( 0.3 ) Amortization of prior service cost — — 0.2 0.3 — — Settlement (1) — — 4.4 — — — Net periodic benefit (income) cost (2) $ ( 2.1 ) $ ( 1.2 ) $ 8.3 $ 2.6 $ ( 0.3 ) $ ( 0.3 ) (1) Settlement of $ 4.4 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans which was completed in the second quarter of 2024. (2) The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense" in the Consolidated Statements of Income (Loss) .

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan	The following table summarizes our stock-based compensation expense (including stock options, restricted stock units ("RSUs") and performance stock units ("PSUs") for the three and nine months ended September 30, 2024 and 2023: Three months ended Nine Months Ended (in millions) 2024 2023 2024 2023 Stock option compensation expense $ 0.1 $ 0.3 $ 0.4 $ 2.4 RSU compensation expense 1.3 1.3 6.3 4.9 PSU compensation expense 0.2 ( 0.1 ) 2.5 3.1 Total stock-based compensation expense $ 1.6 $ 1.5 $ 9.2 $ 10.4
Schedule of Unrecognized Compensation Cost, Nonvested Awards	The following table summarizes our unrecognized compensation expense and the weighted-average period over which the expense will be recognized as of September 30, 2024: September 30, 2024 (in millions, except weighted average years) Unrecognized Compensation Expense Weighted Average Years Expense To Be Recognized Over Stock options $ 0.2 0.5 RSUs $ 8.4 2.1 PSUs $ 4.5 1.7

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2024
Inventory Disclosure [Abstract]
Components of Inventories	The components of inventories were as follows: (in millions) September 30, 2024 December 31, 2023 Raw materials $ 39.4 $ 50.1 Work in process 4.3 4.7 Finished goods 281.1 272.7 Total inventories $ 324.8 $ 327.5

Goodwill and Identifiable Int_2

Goodwill and Identifiable Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 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, 2023 $ 383.6 $ 206.4 $ 590.0 Goodwill impairment ( 127.5 ) — ( 127.5 ) Foreign currency translation ( 1.5 ) ( 2.0 ) ( 3.5 ) Balance at September 30, 2024 $ 254.6 $ 204.4 $ 459.0
Gross Carrying Value and Accumulated Amortization by Class of Identifiable Intangible Assets	The gross carrying value and accumulated amortization by class of identifiable intangible assets as of September 30, 2024 and December 31, 2023, were as follows: September 30, 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) $ 101.2 $ ( 44.5 ) $ 56.7 $ 295.1 $ ( 44.5 ) $ 250.6 Amortizable intangible assets: Trade names (2) 648.5 ( 156.0 ) 492.5 497.1 ( 142.0 ) 355.1 Customer and contractual relationships 362.7 ( 235.0 ) 127.7 362.4 ( 221.3 ) 141.1 Vendor relationships 82.4 ( 20.8 ) 61.6 82.4 ( 16.7 ) 65.7 Patents 8.2 ( 5.8 ) 2.4 8.2 ( 5.0 ) 3.2 Subtotal 1,101.8 ( 417.6 ) 684.2 950.1 ( 385.0 ) 565.1 Total identifiable intangibles $ 1,203.0 $ ( 462.1 ) $ 740.9 $ 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 two indefinite-lived trade names from indefinite-lived intangibles to amortizable intangible assets as of June 1, 2024.
Estimated Amortization Expense for Future Periods	Estimated amortization expense for amortizable intangible assets, as of September 30, 2024, for the current year and the next five years is as follows: (in millions) 2024 2025 2026 2027 2028 2029 Estimated amortization expense (3) $ 45.1 $ 45.7 $ 43.6 $ 41.2 $ 39.0 $ 37.2 (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)	9 Months Ended
	Sep. 30, 2024
Restructuring and Related Activities [Abstract]
Summary of Activity in Restructuring Accounts	The summary of the activity in the restructuring liability for the nine months ended September 30, 2024 was as follows: (in millions) Balance at December 31, 2023 Provision Cash Expenditures Non-cash Items/Currency Change Balance at September 30, 2024 Employee termination costs (1) $ 27.5 $ 6.1 $ ( 11.4 ) $ ( 0.1 ) $ 22.1 Other 0.9 — ( 0.9 ) — 0.0 Total restructuring liability $ 28.4 $ 6.1 $ ( 12.3 ) $ ( 0.1 ) $ 22.1 (1) We expect the remaining $ 22.1 million employee termination costs to be substantially paid in the next twelve months . The summary of the activity in the restructuring liability for the nine months ended September 30, 2023 was as follows: (in millions) Balance at December 31, 2022 Provision Cash Expenditures Non-cash Items/Currency Change Balance at September 30, 2023 Employee termination costs $ 8.7 $ 4.9 $ ( 6.9 ) $ — $ 6.7 Other — 1.4 ( 0.2 ) — 1.2 Total restructuring liability $ 8.7 $ 6.3 $ ( 7.1 ) $ — $ 7.9

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2024
Earnings Per Share [Abstract]
Summary of Weighted-Average Number of Shares Outstanding	Our weighted-average number of shares outstanding for the three and nine months ended September 30, 2024 and 2023 was as follows: Three months ended September 30, Nine Months Ended September 30, (in millions) 2024 2023 2024 2023 Weighted-average number of shares of common stock outstanding - basic 96.0 95.4 96.2 95.2 Effect of dilutive securities: Restricted stock units 1.5 1.3 — 1.6 Weighted-average shares and assumed conversions - diluted (1) 97.5 96.7 96.2 96.8 (1) As a result of the net loss for the nine months ended September 30, 2024 , diluted earnings per share does not include the effects of the stock awards for which the average market price for the period exceeds the exercised price, as their effect would have been anti-dilutive.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2024 and December 31, 2023: Fair Value of Derivative Instruments Derivative Assets Derivative Liabilities (in millions) Balance Sheet Location September 30, December 31, Balance Sheet Location September 30, December 31, Derivatives designated as hedging instruments: Foreign exchange contracts Other current assets $ 0.2 $ 0.3 Other current liabilities $ 2.3 $ 1.6 Derivatives not designated as hedging instruments: Foreign exchange contracts Other current assets 0.9 1.0 Other current liabilities 0.3 0.1 Foreign exchange contracts Other non-current assets 4.9 3.2 Other non-current liabilities 4.9 3.2 Total derivatives $ 6.0 $ 4.5 $ 7.5 $ 4.9
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The following tables summarize the pre-tax effect of our derivative financial instruments on the condensed consolidated financial statements for the three and nine months ended September 30, 2024 and 2023: 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) Three months ended September 30, Three months ended September 30, (in millions) 2024 2023 2024 2023 Cash flow hedges: Foreign exchange contracts $ ( 2.0 ) $ 1.5 Cost of products sold $ 0.3 $ ( 0.6 ) 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) Nine months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 Cash flow hedges: Foreign exchange contracts $ ( 0.4 ) $ 1.9 Cost of products sold $ ( 0.6 ) $ ( 1.4 ) 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 Amount of (Gain) Loss Recognized in Income Three months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 Foreign exchange contracts Other expense (income), net $ 1.1 $ ( 3.1 ) $ ( 1.0 ) $ ( 0.1 )

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets and Liabilities Measured on a 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 September 30, 2024 and December 31, 2023: (in millions) September 30, December 31, Assets: Forward currency contracts $ 6.0 $ 4.5 Liabilities: Forward currency contracts $ 7.5 $ 4.9

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 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, 2023 $ ( 0.7 ) $ ( 349.8 ) $ ( 175.8 ) $ ( 526.3 ) Other comprehensive loss before reclassifications, net of tax ( 0.3 ) ( 23.4 ) ( 5.5 ) ( 29.2 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax ( 0.4 ) — 7.0 6.6 Balance at September 30, 2024 $ ( 1.4 ) $ ( 373.2 ) $ ( 174.3 ) $ ( 548.9 )
Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	The reclassifications out of AOCI for the three and nine months ended September 30, 2024 and 2023 were as follows: Three months ended Nine months ended September 30, (in millions) 2024 2023 2024 2023 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Amount Reclassified from Accumulated Other Comprehensive Income (Loss) Location on Income Statement Gain (loss) on cash flow hedges: Foreign exchange contracts $ ( 0.3 ) $ 0.6 $ 0.6 $ 1.4 Cost of products sold Tax expense (benefit) 0.1 ( 0.2 ) ( 0.2 ) ( 0.4 ) Income tax expense Net of tax $ ( 0.2 ) $ 0.4 $ 0.4 $ 1.0 Defined benefit plan items: Amortization of net actuarial loss (1) $ ( 1.9 ) $ ( 1.6 ) $ ( 9.1 ) $ ( 4.7 ) Amortization of prior service cost (1) ( 0.1 ) ( 0.1 ) ( 0.2 ) ( 0.3 ) Total before tax ( 2.0 ) ( 1.7 ) ( 9.3 ) ( 5.0 ) Tax benefit 0.5 0.6 2.3 1.5 Income tax expense Net of tax $ ( 1.5 ) $ ( 1.1 ) $ ( 7.0 ) $ ( 3.5 ) Total reclassifications for the period, net of tax $ ( 1.7 ) $ ( 0.7 ) $ ( 6.6 ) $ ( 2.5 ) (1) These AOCI components are included in the computation of net periodic benefit (income) cost for pension and post-retirement plans including $ 3.6 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans in the second quarter of 2024. See "Note 5 . Pension and Other Retiree Benefits" for additional details.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables present our net sales disaggregated by regional geography, by reporting business segments and our net sales disaggregated by the timing of revenue recognition for the three and nine months ended September 30, 2024 and 2023: Three months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 United States $ 189.8 $ 195.0 $ 552.0 $ 613.1 Canada 23.7 25.3 71.1 78.6 Latin America 45.6 64.1 125.5 159.1 ACCO Brands Americas 259.1 284.4 748.6 850.8 EMEA (1) 125.5 126.6 370.2 388.1 Australia/N.Z. 28.6 29.7 76.9 82.1 Asia 7.7 7.3 22.4 23.2 ACCO Brands International 161.8 163.6 469.5 493.4 Net sales (2) $ 420.9 $ 448.0 $ 1,218.1 $ 1,344.2 (1) 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. Three months ended September 30, Nine months ended September 30, (in millions) 2024 2023 2024 2023 Product and services transferred at a point in time $ 416.3 $ 439.8 $ 1,195.0 $ 1,313.2 Product and services transferred over time 4.6 8.2 23.1 31.0 Net sales $ 420.9 $ 448.0 $ 1,218.1 $ 1,344.2

Information on Business Segme_2

Information on Business Segments (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Net Sales by Business Segment	Net sales by reportable business segment for the three and nine months ended September 30, 2024 and 2023 were as follows: Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2024 2023 2024 2023 ACCO Brands Americas $ 259.1 $ 284.4 $ 748.6 $ 850.8 ACCO Brands International 161.8 163.6 469.5 493.4 Net sales $ 420.9 $ 448.0 $ 1,218.1 $ 1,344.2
Schedule of Operating Income (Loss) by Business Segment	Operating income (loss) by business segment for the three and nine months ended September 30, 2024 and 2023 was as follows: Three Months Ended September 30, Nine Months Ended September 30, (in millions) 2024 2023 2024 2023 ACCO Brands Americas $ 25.9 $ 33.8 $ ( 76.7 ) $ 106.5 ACCO Brands International 9.5 9.4 30.1 26.2 Segment operating income (loss) 35.4 43.2 ( 46.6 ) 132.7 Corporate ( 9.1 ) ( 11.0 ) ( 32.4 ) ( 35.2 ) Operating income (loss)⁽¹⁾ 26.3 32.2 ( 79.0 ) 97.5 Interest expense 13.7 15.6 40.8 45.0 Interest income ( 2.0 ) ( 1.6 ) ( 6.1 ) ( 6.2 ) Non-operating pension expense 0.4 0.2 5.6 0.5 Other expense (income), net 0.4 ( 3.6 ) ( 0.4 ) ( 2.1 ) Income (loss) before income tax $ 13.8 $ 21.6 $ ( 118.9 ) $ 60.3 (1) Operating income (loss) is defined as i) net sales; ii) less cost of products sold; iii) less selling, general and administrative expenses; iv) less amortization of intangibles; v) less restructuring; and vi) less change in the fair value of contingent consideration.

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details) - Segment		9 Months Ended
	Jan. 01, 2024	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	2	2

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	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total debt	$ 914.4	$ 925.6
Current portion	59.2	36.7
Debt issuance costs, unamortized	5.4	6.7
Long-term debt, net	849.8	882.2
Euro Senior Secured Term Loan A, due March 2026 (floating interest rate 5.35% at September 30, 2024 and 5.93% at December 31, 2023
Debt Instrument [Line Items]
Total debt	205.5	218.2
USD Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.94% at September 30, 2024 and 7.50% at December 31, 2023)
Debt Instrument [Line Items]
Total debt	72.8	78
Australian Dollar Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.48% at September 30, 2024 and 6.42% at December 31, 2023
Debt Instrument [Line Items]
Total debt	30.7	32.5
U.S. Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.94% at September 30, 2024 and 7.4% at December 31, 2023
Debt Instrument [Line Items]
Total debt	13.5	7.3
Australian Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.40% at September 30, 2024 and 6.42% at December 31, 2023)
Debt Instrument [Line Items]
Total debt	9	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	$ 7.9	$ 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)	Sep. 30, 2024	Dec. 31, 2023
Senior Secured Notes | Euro Senior Secured Term Loan A, due March 2026 (floating interest rate 5.35% at September 30, 2024 and 5.93% at December 31, 2023
Debt Instrument [Line Items]
Floating interest rate (percent)	5.35%	5.93%
Senior Secured Notes | USD Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.94% at September 30, 2024 and 7.50% at December 31, 2023)
Debt Instrument [Line Items]
Floating interest rate (percent)	6.94%	7.50%
Senior Secured Notes | Australian Dollar Senior Secured Term Loan A, due March 2026 (floating interest rate of 6.48% at September 30, 2024 and 6.42% at December 31, 2023
Debt Instrument [Line Items]
Floating interest rate (percent)	6.48%	6.42%
Senior Secured Notes | U.S. Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.94% at September 30, 2024 and 7.4% at December 31, 2023
Debt Instrument [Line Items]
Floating interest rate (percent)	6.94%	7.40%
Senior Secured Notes | Australian Dollar Senior Secured Revolving Credit Facility, due March 2026 (floating interest rate of 6.40% at September 30, 2024 and 6.42% at December 31, 2023)
Debt Instrument [Line Items]
Floating interest rate (percent)	6.40%	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

9 Months Ended

Oct. 30, 2024 USD ($)

Oct. 30, 2024 EUR (€)

Oct. 30, 2024 AUD ($)

Sep. 30, 2024 USD ($)

Oct. 30, 2024 EUR (€)

Dec. 31, 2023 USD ($)

Mar. 15, 2021 USD ($)

May 23, 2019

May 22, 2019

Jan. 27, 2017 USD ($)

Jan. 27, 2017 EUR (€)

Jan. 27, 2017 AUD ($)

Debt Instrument [Line Items]

Total debt

$ 914,400,000

$ 925,600,000

Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25%)

Debt Instrument [Line Items]

Total debt

575,000,000

575,000,000

USD Senior Secured Term Loan A

Debt Instrument [Line Items]

Total debt

72,800,000

78,000,000

Australian Dollar Senior Secured Term Loan A

Debt Instrument [Line Items]

Total debt

30,700,000

32,500,000

Euro Senior Secured Term Loan A

Debt Instrument [Line Items]

Total debt

$ 205,500,000

$ 218,200,000

Senior Secured Notes

Debt Instrument [Line Items]

Credit agreement, face amount

$ 320,800,000

€ 300

Maximum borrowing capacity

100,000,000

Senior Secured Notes | Senior Secured Credit Facility Due January 2022 | Minimum

Debt Instrument [Line Items]

Fixed coverage ratio

1.25

Senior Secured Notes | AUD Term Loan A

Debt Instrument [Line Items]

Maximum borrowing capacity

60,400,000

$ 80

Senior Secured Notes | Senior Secured Credit Facility Due March 2026

Debt Instrument [Line Items]

Maximum consolidated leverage ratio

4

Consolidated leverage ratio

3.5

Senior Secured Notes | Senior Secured Credit Facility Due May 2024 | Minimum

Debt Instrument [Line Items]

Interest coverage ratio

3

Senior Notes | Senior Unsecured Notes, due March 2029 (fixed interest rate of 4.25%)

Debt Instrument [Line Items]

Credit agreement, face amount

$ 575,000,000

Stated percentage

4.25%

4.25%

Revolving Facility | Senior Secured Notes

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 600,000,000

Revolving Facility | Senior Secured Notes | Senior Secured Credit Facility Due March 2026

Debt Instrument [Line Items]

Credit agreement, maturity date

Mar. 31, 2026

Total debt

$ 22,500,000

Amount available for borrowings under Senior Secured Revolving Credit Facilities

569,000,000

Letters of credit outstanding

$ 8,500,000

Revolving Facility | Senior Secured Notes | Senior Secured Credit Facility Due October 30, 2029

Debt Instrument [Line Items]

Credit agreement, maturity date

Oct. 30, 2029

Subsequent Event | Senior Secured Notes | Euro Senior Secured Term Loan A

Debt Instrument [Line Items]

Credit agreement, face amount

$ 199,800,000

€ 184.1

Subsequent Event | Revolving Facility | Senior Secured Notes | Maximum

Debt Instrument [Line Items]

Total debt

467,500,000

Subsequent Event | Revolving Facility | Senior Secured Notes | USD Senior Secured Term Loan A

Debt Instrument [Line Items]

Repayments of outstanding borrowings

72,800,000

Subsequent Event | Revolving Facility | Senior Secured Notes | Australian Dollar Senior Secured Term Loan A

Debt Instrument [Line Items]

Repayments of outstanding borrowings

29,200,000

$ 44.4

Subsequent Event | Revolving Facility | Senior Secured Notes | Euro Senior Secured Term Loan A

Debt Instrument [Line Items]

Repayments of outstanding borrowings

$ 66,400,000

€ 61.2

Long-term Debt and Short-term_6

Long-term Debt and Short-term Borrowings - Summary of Financial Covenants and Pricing (Details) - Secured Debt - Subsequent Event	Oct. 30, 2024
Level I
Debt Instrument [Line Items]
Undrawn Fee	0.00375
Level II
Debt Instrument [Line Items]
Undrawn Fee	0.0035
Level III
Debt Instrument [Line Items]
Undrawn Fee	0.0030
Level IV
Debt Instrument [Line Items]
Undrawn Fee	0.0025
SOFR | Level I
Debt Instrument [Line Items]
SOFR Spread	0.0225
SOFR | Level II
Debt Instrument [Line Items]
SOFR Spread	0.0200
SOFR | Level III
Debt Instrument [Line Items]
SOFR Spread	0.0175
SOFR | Level IV
Debt Instrument [Line Items]
SOFR Spread	0.0150

Long-term Debt and Short-term_7

Long-term Debt and Short-term Borrowings - Schedule of Applicable Rate and Undrawn Fee Based on Company's Consolidated Leverage Ratio (Details) - Secured Debt - Senior Secured Credit Facility Due March 2026	9 Months Ended
	Sep. 30, 2024
> 4.50 to 1.00
Debt Instrument [Line Items]
Undrawn fee	0.50%
> 4.50 to 1.00 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	2.50%
> 4.50 to 1.00 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.50%
≤ 4.50 to 1.00 and > 4.00 to 1.00
Debt Instrument [Line Items]
Undrawn fee	0.375%
≤ 4.50 to 1.00 and > 4.00 to 1.00 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	2.25%
≤ 4.50 to 1.00 and > 4.00 to 1.00 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.25%
≤ 4.00 to 1.00 and > 3.50 to 1.00
Debt Instrument [Line Items]
Undrawn fee	0.35%
≤ 4.00 to 1.00 and > 3.50 to 1.00 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	2%
≤ 4.00 to 1.00 and > 3.50 to 1.00 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1%
≤ 3.50 to 1.00 and > 3.00 to 1.00
Debt Instrument [Line Items]
Undrawn fee	0.30%
≤ 3.50 to 1.00 and > 3.00 to 1.00 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.75%
≤ 3.50 to 1.00 and > 3.00 to 1.00 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.75%
≤ 3.00 to 1.00 and > 2.00 to 1.00
Debt Instrument [Line Items]
Undrawn fee	0.25%
≤ 3.00 to 1.00 and > 2.00 to 1.00 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.50%
≤ 3.00 to 1.00 and > 2.00 to 1.00 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.50%
≤ 2.00 to 1.00
Debt Instrument [Line Items]
Undrawn fee	0.20%
≤ 2.00 to 1.00 | Applicable Rate on Euro/AUD/CDN Dollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.25%
≤ 2.00 to 1.00 | Applicable Rate on Base Rate Loans
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.25%

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating lease cost	$ 7.2	$ 7.3	$ 21.8	$ 21.4
Sublease income	(0.8)	(0.6)	(2.4)	(1.9)
Total lease cost	$ 6.4	$ 6.7	$ 19.4	$ 19.5

Leases - Summary of Other Infor

Leases - Summary of Other Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating cash flows from operating leases	$ 20.8	$ 22.6
Right-of-use assets obtained in exchange for lease obligations, operating leases	$ 14.4	$ 14.7
Weighted average remaining lease term, operating leases (in years)	5 years 9 months 18 days
Weighted average discount rate, operating leases (as a percentage)	5.20%

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments, Net of Sublease Income (Details) $ in Millions	Sep. 30, 2024 USD ($)
Operating Leases
2024	$ 7.1
2025	25.2
2026	20.6
2027	15.3
2028	12.8
2029	10.1
Thereafter	18.1
Total minimum lease payments	109.2
Less imputed interest	15.6
Future minimum payments for leases, net of sublease rental income and imputed interest	$ 93.6

Pension and Other Retiree Ben_3

Pension and Other Retiree Benefits - Net Periodic Benefit Expense (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 0		$ 0	$ 0		$ 0
Interest cost		1.9		2	5.7		6
Expected return on plan assets		(3.2)		(3)	(9.6)		(9)
Amortization of net loss (gain)		0.6		0.6	1.8		1.8
Amortization of prior service cost		0		0	0		0
Settlement	[1]				0		0
Net periodic benefit (income) cost	[2]	(0.7)		(0.4)	(2.1)		(1.2)
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.1		0.1	0.5		0.3
Interest cost		4.6		5.1	13.8		15
Expected return on plan assets		(4.9)		(5.5)	(14.6)		(16.2)
Amortization of net loss (gain)		1.4		1.1	4		3.2
Amortization of prior service cost		0.1		0.1	0.2		0.3
Settlement			$ (4.4)		4.4	[1]	0	[1]
Net periodic benefit (income) cost	[2]	1.3		0.9	8.3		2.6
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost		0		0	0		0
Interest cost		0		0	0		0
Expected return on plan assets		0		0	0		0
Amortization of net loss (gain)		(0.1)		(0.1)	(0.3)		(0.3)
Amortization of prior service cost		0		0	0		0
Settlement	[1]				0		0
Net periodic benefit (income) cost	[2]	$ (0.1)		$ (0.1)	$ (0.3)		$ (0.3)
[1] Settlement of $ 4.4 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans which was completed in the second quarter of 2024. The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense" in the Consolidated Statements of Income (Loss) .

Pension and Other Retiree Ben_4

Pension and Other Retiree Benefits - Net Periodic Benefit Expense (Parenthetical) (Details) - Pension Plan [Member] - USD ($) $ in Millions		3 Months Ended	9 Months Ended
		Jun. 30, 2024	Sep. 30, 2024		Sep. 30, 2023
United States
Defined Benefit Plan Disclosure [Line Items]
Settlement	[1]		$ 0		$ 0
International
Defined Benefit Plan Disclosure [Line Items]
Settlement		$ 4.4	$ (4.4)	[1]	$ 0	[1]
[1] Settlement of $ 4.4 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans which was completed in the second quarter of 2024.

Pension and Other Retiree Ben_5

Pension and Other Retiree Benefits - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to defined benefit plans for 2024	$ 17.7
Contributions by company to date	$ 11.8

Stock-Based Compensation - Shar

Stock-Based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1.6	$ 1.5	$ 9.2	$ 10.4
Stock option compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0.1	0.3	0.4	2.4
RSU compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1.3	1.3	6.3	4.9
PSU compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 0.2	$ (0.1)	$ 2.5	$ 3.1

Stock-Based Compensation - Unre

Stock-Based Compensation - Unrecognized Compensation Expense (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 0.2
Weighted Average Years Expense To Be Recognized Over	6 months
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 8.4
Weighted Average Years Expense To Be Recognized Over	2 years 1 month 6 days
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 4.5
Weighted Average Years Expense To Be Recognized Over	1 year 8 months 12 days

Inventories - Components of Inv

Inventories - Components of Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 39.4	$ 50.1
Work in process	4.3	4.7
Finished goods	281.1	272.7
Total inventories	$ 324.8	$ 327.5

Goodwill and Identifiable Int_3

Goodwill and Identifiable Intangible Assets - Narrative (Details) $ in Millions		3 Months Ended		9 Months Ended
	May 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) TradeName Reportingunit	Sep. 30, 2023 USD ($)	Jun. 01, 2024	Dec. 31, 2023 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | Reportingunit				2
Amortization of intangibles		$ 11.7	$ 10.8	$ 33.2	$ 32.7
Goodwill impairment	$ 127.5			127.5
Accumulated impairment losses		$ 530.8		$ 530.8			$ 403.3
Indefinite-lived intangibles, impairment charge	$ 37.7
Number of indefinite-lived trade names | TradeName				3
Finite lived intangible asset useful life						30 years

Goodwill and Identifiable Int_4

Goodwill and Identifiable Intangible Assets - Summary of Changes in Net Carrying Amount Goodwill By Segment (Details) - USD ($) $ in Millions		9 Months Ended
	May 31, 2024	Sep. 30, 2024
Goodwill [Roll Forward]
Beginning balance		$ 590
Goodwill impairment	$ (127.5)	(127.5)
Foreign currency translation		(3.5)
Ending balance		459
ACCO Brands Americas
Goodwill [Roll Forward]
Beginning balance		383.6
Goodwill impairment		(127.5)
Foreign currency translation		(1.5)
Ending balance		254.6
ACCO Brands International
Goodwill [Roll Forward]
Beginning balance		206.4
Goodwill impairment		0
Foreign currency translation		(2)
Ending balance		$ 204.4

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		Sep. 30, 2024	Dec. 31, 2023
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		$ 1,101.8	$ 950.1
Amortizable intangible assets, Accumulated Amortization		(417.6)	(385)
Amortizable intangible assets, Net Book Value		684.2	565.1
Total identifiable intangibles
Total identifiable intangible assets, Gross Carrying Amounts		1,203	1,245.2
Total identifiable intangibles, Accumulated Amortization		(462.1)	(429.5)
Total identifiable intangibles, Net Book Value		740.9	815.7
Trade Names
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts	[1]	648.5	497.1
Amortizable intangible assets, Accumulated Amortization	[1]	(156)	(142)
Amortizable intangible assets, Net Book Value	[1]	492.5	355.1
Customer and contractual relationships
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		362.7	362.4
Amortizable intangible assets, Accumulated Amortization		(235)	(221.3)
Amortizable intangible assets, Net Book Value		127.7	141.1
Vendor Relationships
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		82.4	82.4
Amortizable intangible assets, Accumulated Amortization		(20.8)	(16.7)
Amortizable intangible assets, Net Book Value		61.6	65.7
Patents
Amortizable intangible assets:
Amortizable intangible assets, Gross Carrying Amounts		8.2	8.2
Amortizable intangible assets, Accumulated Amortization		(5.8)	(5)
Amortizable intangible assets, Net Book Value		2.4	3.2
Trade Names
Indefinite-lived intangible assets:
Indefinite-lived intangible assets, Gross Carrying Amount	[2]	101.2	295.1
Indefinite-lived intangible asset, Accumulated Amortization	[2]	(44.5)	(44.5)
Indefinite-lived intangible assets, Net Book Value	[2]	$ 56.7	$ 250.6
[1] Reflects the change of two indefinite-lived trade names from indefinite-lived intangibles 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	Sep. 30, 2024 USD ($)	[1]
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated amortization expense, 2024	$ 45.1
Estimated amortization expense, 2025	45.7
Estimated amortization expense, 2026	43.6
Estimated amortization expense, 2027	41.2
Estimated amortization expense, 2028	39
Estimated amortization expense, 2029	$ 37.2
[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	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Restructuring and Related Activities [Abstract]
Net restructuring expense	$ 6.7	$ 3	$ 6.1	$ 6.3

Restructuring - Summary of Acti

Restructuring - Summary of Activity in Restructuring Liability (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024		Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023
Restructuring Reserve [Roll Forward]
Balance at beginning of period				$ 28.4		$ 8.7
Provision	$ 6.7		$ 3	6.1		6.3
Cash expenditures				(12.3)		(7.1)
Non-cash Items/ Currency Change				(0.1)		0
Balance at end of period	22.1		7.9	22.1		7.9
Employee termination costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period				27.5	[1]	8.7
Provision				6.1	[1]	4.9
Cash expenditures				(11.4)	[1]	(6.9)
Non-cash Items/ Currency Change				(0.1)	[1]	0
Balance at end of period	22.1	[1]	6.7	22.1	[1]	6.7
Other
Restructuring Reserve [Roll Forward]
Balance at beginning of period				0.9		0
Provision				0		1.4
Cash expenditures				(0.9)		(0.2)
Non-cash Items/ Currency Change				0		0
Balance at end of period	$ 0		$ 1.2	$ 0		$ 1.2
[1] We expect the remaining $ 22.1 million employee termination costs to be substantially paid in the next twelve months .

Restructuring - Summary of Ac_2

Restructuring - Summary of Activity in Restructuring Liability (Parenthetical) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024		Dec. 31, 2023		Sep. 30, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 22.1		$ 28.4		$ 7.9	$ 8.7
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 22.1	[1]	$ 27.5	[1]	$ 6.7	$ 8.7
Payment period for restructuring costs	12 months
[1] We expect the remaining $ 22.1 million employee termination costs to be substantially paid in the next twelve months .

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
	May 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2019	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2012
Income Tax Examination [Line Items]
Income tax (benefit) expense		$ 4.5		$ 6.7		$ 3.3	$ 22.7
Income (loss) before income tax		$ 13.8		21.6		(118.9)	60.3
Increase (decrease) in income taxes				$ (2.2)			$ (19.4)
Non-cash charge for impairment of goodwill	$ 127.5					$ 127.5
Minimum global tax		15%				15%
Standard penalty cancellation percentage							75%
Penalties, interest and other fees penalties			$ 13.3
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 | 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 (benefit) expense						$ (2.6)
Open tax year						2019 2020 2021 2022 2023 2024
Income tax examination, interest expense						$ 0.5	$ 1.3
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2008 to 2010
Income Tax Examination [Line Items]
Additional reserve from a prior period					$ 5.6
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 to 2012
Income Tax Examination [Line Items]
Unrecognized tax benefits								$ 44.5
Potential tax adjustment related to related to acquisition purchase price								$ 43.3
Foreign Tax Authority | Canada Revenue Agency
Income Tax Examination [Line Items]
Open tax year						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						2022 2021 2022 2023 2024
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC)
Income Tax Examination [Line Items]
Open tax year						2022 2023 2024
Foreign Tax Authority | Other Noncurrent Liabilities | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 to 2010
Income Tax Examination [Line Items]
Unrecognized tax benefits		$ 20				$ 20
State and Local Jurisdiction | Minimum
Income Tax Examination [Line Items]
Statutes of limitation, period						2 years
State and Local Jurisdiction | Maximum
Income Tax Examination [Line Items]
Statutes of limitation, period						6 years

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Common stock outstanding (in shares)	93,400,000	94,900,000	93,400,000	94,900,000
Common stock repurchases (shares)	2,400,000	0	2,400,000	0
Shares related to tax withholding for share-based compensation (in shares)			400,000	300,000
Potentially dilutive shares excluded from computation of dilutive earnings per share (in shares)	10,000,000	10,400,000	10,200,000	9,800,000

Earnings Per Share - Summary of

Earnings Per Share - Summary of Weighted-Average Number of Shares Outstanding (Details) - shares shares in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average number of common shares outstanding - basic (in shares)		96	95.4	96.2	95.2
Weighted-average number of common shares outstanding - diluted (in shares)	[1]	97.5	96.7	96.2	96.8
Restricted stock units
Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract]
Incremental dilutive common shares (in shares)		1.5	1.3	0	1.6
[1] As a result of the net loss for the nine months ended September 30, 2024 , diluted earnings per share does not include the effects of the stock awards for which the average market price for the period exceeds the exercised price, as their effect would have been anti-dilutive.

Derivative Financial Instrume_3

Derivative Financial Instruments - Narrative (Details) - Foreign exchange contracts - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Derivatives not designated as hedging instruments
Derivative [Line Items]
U.S. dollar equivalent notional value	$ 108,700,000	$ 102,300,000
Cash Flow Hedging | Derivatives designated as hedging instruments
Derivative [Line Items]
U.S. dollar equivalent notional value	$ 99,500,000	$ 80,200,000

Derivative Financial Instrume_4

Derivative Financial Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 6	$ 4.5
Derivative Liabilities	7.5	4.9
Foreign exchange contracts | Derivatives designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	0.2	0.3
Foreign exchange contracts | Derivatives designated as hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	2.3	1.6
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Assets	0.9	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	4.9	3.2
Foreign exchange contracts | Derivatives not designated as hedging instruments | Other Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 4.9	$ 3.2

Derivative Financial Instrume_5

Derivative Financial Instruments - Effect of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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)	Other Nonoperating Income (Expense)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI (Effective Portion)	$ (2)	$ 1.5	$ (0.4)	$ 1.9
Foreign exchange contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Reclassified from AOCI to Income (Effective Portion)	0.3	(0.6)	(0.6)	(1.4)
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) Loss Recognized in Income	$ 1.1	$ (3.1)	$ (1)	$ (0.1)

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - Significant Other Observable Inputs (Level 2) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Forward currency contracts, assets	$ 6	$ 4.5
Forward currency contracts, liabilities	$ 7.5	$ 4.9

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt	$ 914.4	$ 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	$ 874.9	$ 870.9

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	$ 787
Balance at end of period	615.5
Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(0.7)
Other comprehensive loss before reclassifications, net of tax	(0.3)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(0.4)
Balance at end of period	(1.4)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(349.8)
Other comprehensive loss before reclassifications, net of tax	(23.4)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0
Balance at end of period	(373.2)
Unrecognized Pension and Other Post-retirement Benefit Costs
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(175.8)
Other comprehensive loss before reclassifications, net of tax	(5.5)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	7
Balance at end of period	(174.3)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at start of period	(526.3)
Other comprehensive loss before reclassifications, net of tax	(29.2)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	6.6
Balance at end of period	$ (548.9)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold		$ 284			$ 303.2			$ 818.2	$ 915.9
Other expense, net		(0.4)			3.6			0.4	2.1
Income tax expense (benefit)		4.5			6.7			3.3	22.7
Net Income (Loss)		9.3	$ (125.2)	$ (6.3)	14.9	$ 26.4	$ (3.7)	(122.2)	37.6
Income (loss) before income tax		13.8			21.6			(118.9)	60.3
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Net Income (Loss)		(1.7)			(0.7)			(6.6)	(2.5)
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]
Income tax expense (benefit)		(0.5)			(0.6)			(2.3)	(1.5)
Net Income (Loss)		(1.5)			(1.1)			(7)	(3.5)
Amortization of net actuarial loss	[1]	(1.9)			(1.6)			(9.1)	(4.7)
Amortization of prior service cost	[1]	(0.1)			(0.1)			(0.2)	(0.3)
Income (loss) before income tax		(2)			(1.7)			(9.3)	(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		(0.3)			0.6			0.6	1.4
Income tax expense (benefit)		0.1			(0.2)			(0.2)	(0.4)
Net Income (Loss)		$ (0.2)			$ 0.4			$ 0.4	$ 1
[1] These AOCI components are included in the computation of net periodic benefit (income) cost for pension and post-retirement plans including $ 3.6 million resulting from the wind-up of the ACCO Brands Canada Salaried and Hourly pension plans in the second quarter of 2024. See "Note 5 . Pension and Other Retiree Benefits" for additional details.

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Parenthetical) (Details) - Pension - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
United States
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit (income) cost	[1]	$ (0.7)		$ (0.4)	$ (2.1)	$ (1.2)
International
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit (income) cost	[1]	$ 1.3		$ 0.9	$ 8.3	$ 2.6
International | ACCO Brands International
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit (income) cost			$ 3.6
[1] The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense" in the Consolidated Statements of Income (Loss) .

Revenue Recognition - Service o

Revenue Recognition - Service or Extended Maintenance Agreements (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Unearned revenue associated with outstanding contracts	$ 3.1	$ 3.1	$ 2.9
Revenue recognized	$ 0.4	$ 2.2

Revenue Recognition - Unearned

Revenue Recognition - Unearned Revenue (Details) $ in Millions	Sep. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Unearned revenue	$ 2.6
Expected timing of satisfaction	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
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		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	[1]	$ 420.9	$ 448	$ 1,218.1	$ 1,344.2
Product and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales		416.3	439.8	1,195	1,313.2
Product and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales		4.6	8.2	23.1	31
ACCO Brands Americas
Disaggregation of Revenue [Line Items]
Net sales		259.1	284.4	748.6	850.8
ACCO Brands Americas | United States
Disaggregation of Revenue [Line Items]
Net sales		189.8	195	552	613.1
ACCO Brands Americas | Canada
Disaggregation of Revenue [Line Items]
Net sales		23.7	25.3	71.1	78.6
ACCO Brands Americas | Latin America
Disaggregation of Revenue [Line Items]
Net sales		45.6	64.1	125.5	159.1
ACCO Brands International
Disaggregation of Revenue [Line Items]
Net sales		161.8	163.6	469.5	493.4
ACCO Brands International | EMEA
Disaggregation of Revenue [Line Items]
Net sales	[2]	125.5	126.6	370.2	388.1
ACCO Brands International | Australia/N.Z.
Disaggregation of Revenue [Line Items]
Net sales		28.6	29.7	76.9	82.1
ACCO Brands International | Asia
Disaggregation of Revenue [Line Items]
Net sales		$ 7.7	$ 7.3	$ 22.4	$ 23.2
[1] (2) Net sales are attributed to geographic areas based on the location of the selling subsidiaries. (1) EMEA is comprised largely of Europe, but also includes export sales to the Middle East and Africa.

Information on Business Segme_3

Information on Business Segments - Narrative (Details) - Segment		9 Months Ended
	Jan. 01, 2024	Sep. 30, 2024
Segment Reporting [Abstract]
Number of operating segments	2	2

Information on Business Segme_4

Information on Business Segments - Net Sales by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net sales	$ 420.9	$ 448	$ 1,218.1	$ 1,344.2
ACCO Brands Americas
Segment Reporting Information [Line Items]
Net sales	259.1	284.4	748.6	850.8
ACCO Brands International
Segment Reporting Information [Line Items]
Net sales	$ 161.8	$ 163.6	$ 469.5	$ 493.4

Information on Business Segme_5

Information on Business Segments - Operating Income (Loss) by Segment (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Segment operating income (loss)	[1]	$ 26.3	$ 32.2	$ (79)	$ 97.5
Interest expense		13.7	15.6	40.8	45
Interest income		(2)	(1.6)	(6.1)	(6.2)
Non-operating pension expense		0.4	0.2	5.6	0.5
Other expense (income), net		0.4	(3.6)	(0.4)	(2.1)
Income (loss) before income tax		13.8	21.6	(118.9)	60.3
Operating Segments
Segment Reporting Information [Line Items]
Segment operating income (loss)		35.4	43.2	(46.6)	132.7
Corporate
Segment Reporting Information [Line Items]
Segment operating income (loss)		(9.1)	(11)	(32.4)	(35.2)
ACCO Brands Americas | Operating Segments
Segment Reporting Information [Line Items]
Segment operating income (loss)		25.9	33.8	(76.7)	106.5
ACCO Brands International | Operating Segments
Segment Reporting Information [Line Items]
Segment operating income (loss)		$ 9.5	$ 9.4	$ 30.1	$ 26.2
[1] Operating income (loss) is defined as i) net sales; ii) less cost of products sold; iii) less selling, general and administrative expenses; iv) less amortization of intangibles; v) less restructuring; and vi) less change in the fair value of contingent consideration.

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Loss Contingencies [Line Items]
Income tax expense (benefit)	$ 4.5	$ 6.7	$ 3.3	$ 22.7
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil
Loss Contingencies [Line Items]
Tax credits			1.9
Income tax expense (benefit)			$ (2.6)