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Information on Operating Segments - Schedule of Operating Results for Operating Segments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | $ 1,666.2 | $ 1,832.8 | $ 1,947.6
Cost of products sold |  | 1,110.8 | 1,234.5 | 1,395.3
Gross profit |  | 555.4 | 598.3 | 552.3
Sales and marketing expenses | [1] | 206.7 | 217.9 | 222.1
Administrative expenses | [2] | 116.8 | 127.5 | 113.6
Restructuring |  | 13.4 | 26.6 | 9.4
Impairment of goodwill and intangible assets |  | 165.2 | 89.5 | 98.7
All other | [3] | 44.7 | 43.3 | 41.2
Total consolidated operating income (loss) |  | (37.0) | 44.7 | 34.8
Interest expense (income), net |  | 45.1 | 51.5 | 37.3
Non-operating pension expense (income) |  | 6.1 | 1.8 | (4.5)
Other (income) expense, net |  | (0.9) | 4.5 | (12.9)
(Loss) income before income tax |  | (87.3) | (13.1) | 14.9
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated operating income (loss) |  | 8.6 | 93.5 | 67.3
Corporate Expense |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated operating income (loss) |  | 45.6 | 48.8 | 32.5
ACCO Brands Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 999.9 | 1,135.7 | 1,200.4
Cost of products sold |  | 666.0 | 761.7 | 845.9
Gross profit |  | 333.9 | 374.0 | 354.5
Sales and marketing expenses | [1] | 115.2 | 123.7 | 132.0
Administrative expenses | [2] | 64.9 | 75.2 | 64.2
Restructuring |  | 6.5 | 16.7 | 6.0
Impairment of goodwill and intangible assets |  | 165.2 | 89.5 | 98.7
All other | [3] | 27.6 | 25.0 | 24.9
ACCO Brands Americas | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated operating income (loss) |  | (45.5) | 43.9 | 28.7
ACCO Brands International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales |  | 666.3 | 697.1 | 747.2
Cost of products sold |  | 444.8 | 472.8 | 549.4
Gross profit |  | 221.5 | 224.3 | 197.8
Sales and marketing expenses | [1] | 91.5 | 94.2 | 90.1
Administrative expenses | [2] | 51.9 | 52.3 | 49.4
Restructuring |  | 6.9 | 9.9 | 3.4
All other | [3] | 17.1 | 18.3 | 16.3
ACCO Brands International | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated operating income (loss) |  | $ 54.1 | $ 49.6 | $ 38.6
[1] | Sales and Marketing consists primarily of advertising, marketing, selling, customer service expenses and research and development.
[2] | Admin expense consists primarily of executive, finance, information technology and human resources expenses.
[3] | All other expense primarily consists of amortization and, for 2022, changes in the fair value of contingent earnout.

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