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Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Property, Plant and Equipment [Line Items]      
Operating lease, weighted average remaining lease term 5 years 1 month 6 days    
Capitalized Computer Software, For Internal Use, Additions $ 2.4 $ 3.6 $ 2.2
Depreciation $ 63.3 $ 60.4 $ 52.9
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    
Building improvements and land improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives description Estimated useful life up to 32 years    
Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Operating lease, weighted average remaining lease term 1 year    
Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term 1 year    
Minimum [Member] | Computer equipment and related software [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 2 years    
Minimum [Member] | Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 25 years    
Minimum [Member] | Furniture and fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 3 years    
Minimum [Member] | Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 3 years    
Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Operating lease, weighted average remaining lease term 11 years    
Lessee, Operating Lease, Lease Not yet Commenced, Renewal Term 10 years    
Maximum [Member] | Computer equipment and related software [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 7 years    
Maximum [Member] | Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 32 years    
Maximum [Member] | Furniture and fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 5 years    
Maximum [Member] | Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, useful life 5 years