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Goodwill and Identifiable Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2025
Finite-Lived Intangible Assets [Line Items] |
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, 2024 |  | $ | 253.3 |  |  | $ | 193.1 |  |  | $ | 446.4 |
Acquisitions(1) |  |  | — |  |  |  | 4.2 |  |  |  | 4.2 |
Foreign currency translation |  |  | 1.3 |  |  |  | 19.9 |  |  |  | 21.2 |
Balance at June 30, 2025 |  | $ | 254.6 |  |  | $ | 217.2 |  |  | $ | 471.8 |
(1) Represents goodwill from the Buro Acquisition.
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 June 30, 2025 and December 31, 2024, were as follows:
|  | June 30, 2025 |  |  | December 31, 2024 |
(in millions) |  | Gross Carrying Amounts |  |  | Accumulated Amortization |  |  | Net Book Value |  |  | Gross Carrying Amounts |  |  | Accumulated Amortization |  |  | Net Book Value |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names(2) |  | $ | 101.2 |  |  | $ | (44.5 | ) |  | $ | 56.7 |  |  | $ | 101.2 |  |  | $ | (44.5 | ) |  | $ | 56.7 |
Amortizable intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  |  | 657.9 |  |  |  | (174.0 | ) |  |  | 483.9 |  |  |  | 627.5 |  |  |  | (157.5 | ) |  |  | 470.0 |
Customer and contractual relationships |  |  | 370.7 |  |  |  | (250.8 | ) |  |  | 119.9 |  |  |  | 350.7 |  |  |  | (230.0 | ) |  |  | 120.7 |
Vendor relationships |  |  | 82.4 |  |  |  | (24.9 | ) |  |  | 57.5 |  |  |  | 82.4 |  |  |  | (22.2 | ) |  |  | 60.2 |
Patents |  |  | 8.2 |  |  |  | (6.7 | ) |  |  | 1.5 |  |  |  | 7.8 |  |  |  | (5.8 | ) |  |  | 2.0 |
Subtotal |  |  | 1,119.2 |  |  |  | (456.4 | ) |  |  | 662.8 |  |  |  | 1,068.4 |  |  |  | (415.5 | ) |  |  | 652.9 |
Total identifiable intangibles |  | $ | 1,220.4 |  |  | $ | (500.9 | ) |  | $ | 719.5 |  |  | $ | 1,169.6 |  |  | $ | (460.0 | ) |  | $ | 709.6 |
(2) Accumulated amortization prior to the adoption of authoritative guidance on goodwill and other intangible assets, at which time further amortization ceased.
Estimated Amortization Expense for Future Periods | Estimated amortization expense for amortizable intangible assets, as of June 30, 2025, for the current year and the next five years is as follows:
(in millions) |  | 2025 |  |  | 2026 |  |  | 2027 |  |  | 2028 |  |  | 2029 |  |  | 2030 |
Estimated amortization expense(3) |  | $ | 45.3 |  |  | $ | 43.3 |  |  | $ | 41.0 |  |  | $ | 38.9 |  |  | $ | 37.2 |  |  | $ | 36.3 |
(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.
Buro |
Finite-Lived Intangible Assets [Line Items] |
Schedule of Acquired Identifiable Intangible Assets | The allocation of the identifiable intangibles acquired in the Buro Acquisition was as follows:
(in millions) |  | Fair Value |  |  | Remaining Useful Life
Trade name |  | $ | 1.9 |  |  | 20 years
Customer relationships |  |  | 3.9 |  |  | 9 years
Total identifiable intangibles acquired |  | $ | 5.8 |  |  |

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