Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Jun. 28, 2020	Dec. 29, 2019
Operating Leases:
Operating lease right-of-use assets	$ 38.0	$ 42.1
Current portion of operating lease liabilities	8.3	9.9
Operating lease liabilities, net of current portion	34.3	37.6
Finance leases:
Property, plant and equipment, net	37.4	38.1
Other current liabilities	0.7	0.6
Other long-term liabilities	$ 38.4	$ 38.4
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent