Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Lessee, Lease, Description [Line Items]
Rent expense	$ 92.5
Total expense for all operating leases and vessel charter agreements	100.0
Total expense for all operating leases and vessel charter agreements		$ 84.3	$ 92.1
Increase in operating lease, right-of-use assets	40.0
Increase in operating lease liabilities	29.6
Panama
Lessee, Lease, Description [Line Items]
Annual payments	$ 0.5
Operating lease term of contract	40 years
Minimum
Lessee, Lease, Description [Line Items]
Terms for vessel charter agreements (in years)	12 months
Maximum
Lessee, Lease, Description [Line Items]
Terms for vessel charter agreements (in years)	15 months