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Retirement and Other Employee Benefits (Tables)
3 Months Ended
Mar. 29, 2024
Retirement Benefits [Abstract]  
Net periodic benefit costs of pension plans and post-retirement plans
The following table sets forth the net periodic benefit costs of our defined benefit pension plans and post-retirement benefit plans (U.S. dollars in millions):
 Quarter ended
March 29,
2024
March 31,
2023
Service cost$1.8 $1.4 
Interest cost2.1 1.8 
Expected return on assets(0.9)(0.8)
Amortization of net actuarial loss0.5 0.2 
Net periodic benefit costs$3.5 $2.6