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Pension and Other Retiree Benefits - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Yr
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Pension and post-retirement benefit obligations $ 117.5 $ 117.2  
Employer contributions 17.3    
Expected contributions to defined benefit plans for 2026 18.0    
Costs related to defined contribution plans 11.9 12.5 $ 12.5
Pension settlement cost   4.5  
Esselte Leitz Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Unfunded Pension Plan liability $ 103.6 98.0  
Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Payment of retirement benefits, commencement age for participants | Yr 60    
Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Payment of retirement benefits, commencement age for participants | Yr 65    
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated benefit obligation $ 567.0 542.9  
Pension Plan | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Pension and post-retirement benefit obligations 0.0 5.1  
Employer contributions $ 1.9 $ 3.0  
Pension Plan | U.S. | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Target asset allocation 38.00%    
Pension Plan | U.S. | Fixed income securities      
Defined Benefit Plan Disclosure [Line Items]      
Target asset allocation 54.00%    
Pension Plan | U.S. | Alternate assets      
Defined Benefit Plan Disclosure [Line Items]      
Target asset allocation 8.00%