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Sale of Assets - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 20, 2020
USD ($)
headquarters
Sep. 27, 2020
USD ($)
Jun. 28, 2020
USD ($)
Sep. 29, 2019
USD ($)
Jun. 30, 2019
USD ($)
Sep. 27, 2020
USD ($)
Sep. 29, 2019
USD ($)
Sale of Assets [Line Items]              
Proceeds from wage subsidy receivables, net of fees and retainers     $ 16.9        
Percentage of receivables held as retainer     5.00%        
Number of headquarters properties sold | headquarters 3            
Number of headquarters properties | headquarters 4            
Sale leaseback transaction, gross proceeds $ 58.5            
Sale leaseback transaction, net proceeds 55.5            
Properties held-for-sale 23.4            
Gain on sale on properties $ 32.1            
Proceeds from sale of assets           $ 55.5 $ 13.8
Gain on sale of assets   $ 0.0   $ 0.0 $ 12.3 $ 32.1 $ 12.3
Land              
Sale of Assets [Line Items]              
Proceeds from sale of assets         11.7    
Transfer of customer contracts              
Sale of Assets [Line Items]              
Proceeds from sale of assets         $ 2.1