Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Capitalized Computer Software, Additions	$ 0.9	$ 2.4	$ 3.6
Depreciation	$ 67.6	$ 63.3	$ 60.4
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	Shorter of the lease term or the estimated useful life
Minimum [Member] | Computer equipment and related software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	2
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	25
Minimum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	3
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	3
Maximum [Member] | Computer equipment and related software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	7
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	32
Maximum [Member] | Building improvements and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	32
Maximum [Member] | Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	5
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, estimated useful lives description	5