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Business and Significant Accounting Policies - Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($)
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Accounting Policies [Abstract]      
Impairment of capitalized software costs $ 0 $ 1,500,000 $ 0
Minimum      
Intangible Assets      
Definite-lived intangible assets, estimated useful life (in years) 4 years    
Maximum      
Intangible Assets      
Definite-lived intangible assets, estimated useful life (in years) 23 years    
Long-lived tangible store assets held and used      
Property and Equipment      
Impairment of long-lived assets held and used $ 2,500,000 $ 1,600,000 $ 1,200,000
Assets impaired during 2018      
Property and Equipment      
Estimated fair value of impaired long-lived assets held and used 100,000    
Assets impaired during 2017      
Property and Equipment      
Estimated fair value of impaired long-lived assets held and used $ 0    
Buildings      
Property and Equipment      
Estimated useful life (in years) 34 years    
Equipment | Minimum      
Property and Equipment      
Estimated useful life (in years) 5 years    
Equipment | Maximum      
Property and Equipment      
Estimated useful life (in years) 7 years    
Information systems hardware and software | Minimum      
Property and Equipment      
Estimated useful life (in years) 2 years    
Information systems hardware and software | Maximum      
Property and Equipment      
Estimated useful life (in years) 5 years    
Furniture and fixtures      
Property and Equipment      
Estimated useful life (in years) 6 years    
Leasehold improvements      
Property and Equipment      
Estimated useful life (in years) 10 years    
P&E under capital leases      
Property and Equipment      
Estimated useful life (in years) 10 years