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Summary of Significant Accounting Policies-Cash Flow Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Jan. 01, 2022
Jan. 02, 2021
Cash paid during the year for:        
Interest expense $ 51.0 $ 23.0 $ 0.3  
Income taxes 54.4 87.3 43.9  
Operating lease liabilities 22.4 17.2 7.3  
Non-cash operating activities:        
ROU assets obtained in exchange for lease liabilities 16.3 0.0 6.0  
Non-cash investing activities:        
Unpaid purchases of property and equipment 0.2 3.8 0.0  
Unsettled common stock proceeds from option exercises 0.0 0.0 0.7  
Reconciliation of cash, cash equivalents and restricted cash:        
Cash and cash equivalents 163.0 202.9 745.3  
Restricted cash 5.2 6.7 3.1  
Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 168.2 $ 209.6 $ 748.4 $ 645.0