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Restructuring - Restructuring Charges (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 16.8 $ 27.2 $ 9.6
Operating Segments | ACCO Brands Americas      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 6.5 16.7 6.0
Operating Segments | ACCO Brands International      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 6.9 9.9 3.4
Corporate      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 3.4 0.6 0.2
Employee termination costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 16.6 [1] 26.1 9.4
Termination of lease agreements      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges     (0.2)
Other      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 0.2 $ 1.1 $ 0.4
[1] We expect the remaining $26.6 million of employee termination costs to be substantially paid within the next twelve months