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Long-term Employee Benefits - Projected Benefit Obligations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 29, 2024
Dec. 31, 2023
Defined Benefit Plans    
Change in benefit obligation:    
PBO at beginning of year $ 36.9 $ 33.9
Service cost 2.1 2.0
Interest cost 1.1 1.0
Contributions by plan participants 0.1 0.0
Benefits paid (1.3) (0.2)
Actuarial (gain) loss (1.4) 2.8
Settlements (1.8) (2.4)
Foreign currency exchange rate changes (2.7) (0.2)
PBO at end of year 33.0 36.9
Change in plan assets:    
Fair value of plan assets at beginning of year 20.4 20.6
Actual return on plan assets 1.0 1.1
Employer contributions 2.6 2.1
Benefits paid (1.0) (0.2)
Settlements (1.9) (2.4)
Foreign currency exchange rate changes (1.8) (0.8)
Fair value of plan assets at end of year 19.3 20.4
Funded status at end of year (13.7) (16.5)
Amounts recognized on the Consolidated Balance Sheets:    
Other assets 1.3 0.7
Other current liabilities (0.4) (0.4)
Other liabilities (14.6) (16.8)
Net amount recognized (13.7) (16.5)
Other Post-employment Benefits    
Change in benefit obligation:    
PBO at beginning of year 18.5 18.6
Service cost 0.4 0.4
Interest cost 0.8 0.9
Benefits paid (1.3) (1.1)
Actuarial (gain) loss (1.0) (0.3)
PBO at end of year 17.4 18.5
Amounts recognized on the Consolidated Balance Sheets:    
Other current liabilities (3.8) (3.9)
Other liabilities (13.6) (14.6)
Net amount recognized $ (17.4) $ (18.5)