Pension Plans (Tables)

3 Months Ended

Mar. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Periodic Pension Costs

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

	Three Months Ended
	March 31, 2017			April 1, 2016
Service cost	$	1.0		$	0.8
Interest cost	1.4			1.9
Expected return on plan assets	(1.8		)	(2.0		)
Amortization of net loss	1.1			1.3
Net periodic pension cost	$	1.7		$	2.0