Business and Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2020	Dec. 31, 2019	Jan. 01, 2019
Property, Plant and Equipment [Line Items]
Depreciation	$ 21.6	$ 22.0	$ 22.7
Internal payroll costs capitalized	0.2	0.4	0.2
Interest costs capitalized	$ 0.2	$ 0.3	$ 0.1
Leasehold Improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Furniture and Fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	15 years
Furniture and Fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years