Balance Sheet Information and Other - Pension Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Balance Sheet Related Disclosures [Abstract]
Service cost	$ 2.7	$ 2.3
Interest cost	1.1	1.3
Expected return on plan assets	(1.5)	(1.5)
Total net periodic pension cost	$ 2.3	$ 2.1