Retirement and Other Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2017

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 pension plans and post-retirement plans (U.S. dollars in millions):

	Quarter ended						Six months ended
	June 30, 2017			July 1, 2016			June 30, 2017			July 1, 2016
Service cost	$	1.4		$	1.3		$	2.8		$	2.6
Interest cost	1.5			1.6			3.1			3.3
Expected return on assets	(0.9		)	(0.9		)	(1.7		)	(1.9		)
Amortization of net actuarial loss	0.3			0.3			0.6			0.6
Net periodic benefit costs	$	2.3		$	2.3		$	4.8		$	4.6