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Summary of Significant Accounting Policies-Cash Flow Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Jan. 01, 2022
Jan. 02, 2021
Dec. 28, 2019
Cash paid during the year for:        
Interest expense $ 23.0 $ 0.3 $ 0.3  
Income taxes 87.3 43.9 39.5  
Operating lease liabilities 17.2 7.3 6.3  
Non-cash operating activities:        
ROU assets obtained in exchange for lease liabilities 0.0 6.0 15.4  
Non-cash Investing and financing activities        
Unpaid purchases of property and equipment 3.8 0.0 2.1  
Settlement of promissory note receivable in connection with business combination 0.0 0.0 5.1  
Unsettled common stock proceeds from option exercises 0.0 0.7 3.0  
Fair value of common stock received for payment of stock option exercise price 0.0 0.0 1.6  
Reconciliation of cash, cash equivalents and restricted cash:        
Cash and cash equivalents 202.9 745.3 641.4  
Restricted cash 6.7 3.1 3.6  
Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 209.6 $ 748.4 $ 645.0 $ 568.1