Pension Plans - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 0.4	$ 0.3
Expected return on plan assets	(0.3)	(0.4)
Net periodic pension cost	0.1	(0.1)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.3	0.3
Interest cost	1.4	1.4
Expected return on plan assets	(1.4)	(1.5)
Amortization of net loss	0.7	0.7
Net curtailment and settlement loss recognized	0.0	0.2
Net periodic pension cost	$ 1.0	$ 1.1