Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Sep. 26, 2021	Dec. 27, 2020
Operating Leases:
Operating lease right-of-use assets	$ 38.8	$ 42.9
Current portion of operating lease liabilities	9.2	8.9
Operating lease liabilities, net of current portion	34.0	38.6
Finance leases:
Property, plant and equipment, net	39.6	36.5
Other current liabilities	1.2	0.9
Other long-term liabilities	$ 43.5	$ 38.8
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net	Property, plant and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities