Retirement and Other Employee Benefits (Tables)

9 Months Ended

Sep. 25, 2020

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				Nine months ended
	September 25, 2020		September 27, 2019		September 25, 2020		September 27, 2019
Service cost	$	1.6	$	1.4	$	4.8	$	4.1
Interest cost	1.5		1.7		4.4		5.1
Expected return on assets	(0.6)		(0.8)		(1.8)		(2.4)
Amortization of net actuarial loss	0.3		0.1		0.9		0.4
Net periodic benefit costs	$	2.8	$	2.4	$	8.3	$	7.2