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Description of Business and Basis of Presentation (Tables)
12 Months Ended
Oct. 01, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Revenues Realized from Each of These Types of Contracts The percentage of revenues realized from each of these types of contracts for the fiscal years ended October 1, 2021, October 2, 2020 and September 27, 2019 was as follows:
 For the Years Ended
 October 1, 2021October 2, 2020 September 27, 2019
Cost-reimbursable76%76%76%
Fixed-price24%24%24%