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Information on Operating Segments - Property, Plant and Equipment by Geographic Region (Details) - USD ($) $ in Millions		Dec. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Property, plant and equipment, net	[1]	$ 138.8	$ 137.5
ACCO Brands Americas
Segment Reporting Information [Line Items]
Property, plant and equipment, net		73.5	74.7
ACCO Brands Americas | U.S.
Segment Reporting Information [Line Items]
Property, plant and equipment, net		48.5	51.1
ACCO Brands Americas | Canada
Segment Reporting Information [Line Items]
Property, plant and equipment, net		0.8	0.9
ACCO Brands Americas | Latin America
Segment Reporting Information [Line Items]
Property, plant and equipment, net		24.2	22.7
ACCO Brands International
Segment Reporting Information [Line Items]
Property, plant and equipment, net		65.3	62.8
ACCO Brands International | EMEA
Segment Reporting Information [Line Items]
Property, plant and equipment, net		55.8	53.5
ACCO Brands International | Australia/N.Z.
Segment Reporting Information [Line Items]
Property, plant and equipment, net		8.9	8.7
ACCO Brands International | Asia-Pacific
Segment Reporting Information [Line Items]
Property, plant and equipment, net		$ 0.6	$ 0.6
[1] Net property, plant and equipment as of December 31, 2025, and 2024 included $25.8 million and $29.4 million of computer software assets, respectively, which are classified within machinery and equipment and construction in progress. Depreciation expense for software was $13.7 million, $13.8 million, and $14.1 million for the years ended December 31, 2025, 2024 and 2023, respectively.

X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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