Pension Plans (Tables)

9 Months Ended

Sep. 25, 2020

Retirement Benefits [Abstract]

Schedule of Net Periodic Pension Costs

The following sets forth the components of our net periodic costs associated with our noncontributory defined benefit pension plans ($ in millions):

	Three Months Ended				Nine Months Ended
	September 25, 2020		September 27, 2019		September 25, 2020		September 27, 2019
U.S. Pension Benefits:
Interest cost	$	0.4	$	0.4	$	1.0	$	1.2
Expected return on plan assets	(0.4)		(0.3)		(1.0)		(1.0)
Amortization of net loss	—		—		0.2		—
Net periodic pension cost	$	—	$	0.1	$	0.2	$	0.2
Non-U.S. Pension Benefits:
Service cost	$	1.2	$	0.7	$	3.4	$	1.7
Interest cost	1.1		1.4		3.1		4.3
Expected return on plan assets	(1.4)		(1.5)		(4.2)		(4.4)
Amortization of net loss	1.1		0.7		3.2		2.1
Amortization of prior service cost	—		—		0.2		—
Net periodic pension cost	$	2.0	$	1.3	$	5.7	$	3.7