Leases Balance Sheet Information (Details) - USD ($) $ in Millions	Mar. 30, 2019	Dec. 30, 2018	Dec. 29, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 210.5	$ 228.0	$ 0.0
Current operating lease obligations	42.3		0.0
Operating lease obligations	173.9		0.0
Total operating lease obligations	216.2	$ 234.3
Property, plant and equipment, net			$ 6.7
Current maturities of long-term debt	2.9
Long-term debt	10.7
Total finance lease obligations	$ 13.6
Operating leases	8 years 4 months 24 days
Finance leases	5 years 7 months 6 days
Weighted Average Discount Rate, Operating	6.20%
Weighted Average Discount Rate, Finance	6.30%
Property, Plant and Equipment
Lessee, Lease, Description [Line Items]
Property, plant and equipment, net	$ 13.3