Leases - Lease Costs (Details) $ in Millions	12 Months Ended
	Dec. 27, 2019 USD ($)
Leases [Abstract]
Finance lease cost, Amortization of lease assets	$ 0.1
Operating lease cost	92.5
Short-term lease cost	7.5
Variable lease cost	6.1
Total lease cost	106.2
Operating cash flows for operating leases	82.1
Financing cash flows for finance leases	$ 0.5