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Leases - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 29, 2020
Jan. 03, 2021
Dec. 30, 2018
Dec. 29, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]          
Leases, remaining lease term (years) 15 years        
Operating lease right-of-use assets   $ 83.2   $ 60.4  
Operating lease current liabilities   19.6   20.1  
Operating lease noncurrent liabilities   $ 67.5   $ 43.3  
Lease expense     $ 31.4    
Operating lease, weighted average discount rate, percent 4.80% 5.10%   5.70%  
Sale of Main Headquarters          
Lessee, Lease, Description [Line Items]          
Operating lease right-of-use assets $ 37.6        
Operating lease current liabilities 1.2        
Operating lease noncurrent liabilities $ 36.1        
Accounting Standards Update 2016-02          
Lessee, Lease, Description [Line Items]          
Operating lease right-of-use assets         $ 74.1
Operating lease current liabilities         19.8
Operating lease noncurrent liabilities         $ 54.3
Minimum          
Lessee, Lease, Description [Line Items]          
Leases, remaining lease term (years)   1 year      
Maximum          
Lessee, Lease, Description [Line Items]          
Leases, remaining lease term (years)   10 years