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Long-term Employee Benefits - Critical Assumptions Used (Details)
 12 Months Ended
Dec. 29, 2024
Dec. 31, 2023
Defined Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average discounts rate, fair value assumptions (in percent) 3.30% 3.30%
Weighted average rate of compensation increases, fair value assumptions (in percent) 3.30% 3.20%
Weighted average discount rate, net periodic benefit cost assumptions (in percent) 3.30% 3.10%
Weighted average expected rate of compensation increases, net periodic benefit cost assumptions (in percent) 3.20% 3.00%
Weighted average expected return on plan assets, net periodic benefit cost assumptions (in percent) 2.90% 2.50%
Other Post-employment Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average discounts rate, fair value assumptions (in percent) 5.00% 4.80%
Weighted average discount rate, net periodic benefit cost assumptions (in percent) 4.80% 5.50%