Leases - Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Finance lease costs:
Amortization of ROU assets	$ 1.7	$ 1.5
Interest on lease liabilities	0.4	0.5
Operating lease costs	24.6	25.1
Total lease costs	$ 26.7	$ 27.1