Leases - Maturities of Operating and Financing Lease Liabilities (Details) $ in Millions	Dec. 27, 2020 USD ($)
Operating Leases
2021	$ 11.7
2022	10.6
2023	10.3
2024	8.1
2025	7.1
Thereafter	8.8
Total lease payments	56.6
Less: imputed interest	(9.1)
Total present value of lease liabilities	47.5
Finance Leases
2021	3.4
2022	3.5
2023	3.5
2024	3.5
2025	3.6
Thereafter	51.3
Total lease payments	68.8
Less: imputed interest	(29.1)
Total present value of lease liabilities	$ 39.7