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Revenue and Contract Balances - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 29, 2020 | Mar. 31, 2019 | Mar. 29, 2020 | Mar. 31, 2019 | Sep. 29, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Contract liability revenue recognized during the period |  |  | $ 105,000 | $ 74,000 |
Revenue recognition net unfavorable operating income adjustments | $ 2,800 |  | 2,800 |  |
Liabilities for anticipated losses | 14,600 |  | 14,600 |  | $ 11,500
Estimated cost to complete the related contracts | 57,000 |  | $ 57,000 |  |
Period for billing and collecting unbilled receivables |  |  | 12 months |  |
Unbilled accounts receivable related to claims and requests for equitable adjustment on contracts | 14,000 |  | $ 14,000 |  | $ 15,000
Remaining unsatisfied performance obligation | $ 2,972,097 |  | $ 2,972,097 |  |
Remaining performance obligation, termination notice period one |  |  | 30 days |  |
Remaining performance obligation, termination notice period two |  |  | 60 days |  |
Remaining performance obligation, termination notice period three |  |  | 90 days |  |
RCM |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Recognized reduction of revenue |  | $ 4,800 |  |  |
Losses from claim settlement |  | 5,900 |  |  |
CIG |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Recognized reduction of revenue |  | 3,600 |  |  |
Losses from claim settlement |  | $ 3,600 |  |  |

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