Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 32.7	$ 27.3
Finance lease cost:
Amortization of right-of-use assets	3.7	3.8
Interest on lease liabilities	0.2	0.3
Total finance lease cost	$ 3.9	$ 4.1