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Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
Mar. 27, 2022
Dec. 27, 2021
Dec. 26, 2021
Business Acquisition [Line Items]      
Goodwill $ 522.9   $ 493.9
Cosmic Advanced Engineering Solutions, Inc.      
Business Acquisition [Line Items]      
Accounts receivable   $ 3.8  
Unbilled receivables   4.0  
Other current assets   0.1  
Property and equipment   1.3  
Intangible assets   10.0  
Total identifiable net assets acquired   19.2  
Total identifiable net liabilities assumed   (9.6)  
Goodwill   28.6  
Net assets acquired, excluding cash   $ 38.2