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Revenue - Additional Information (Details) contract in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 04, 2021 USD ($) contract | Jun. 28, 2020 USD ($) | Jul. 04, 2021 USD ($) | Jun. 28, 2020 USD ($) | Dec. 31, 2020 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Number of active contracts | contract | 10 |  |  |  |
Revenue recognized in contract liability balance | $ 860 | $ 1,200 | $ 2,400 | $ 2,400 |
Technologies | COVID-19 Pandemic | Non-U.S. government |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Loss on contract with customer from COVID-related schedule delays |  |  |  |  | $ 40
Transferred over Time |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Revenue, percentage from products and services transferred to customers | 81.00% | 76.00% | 80.00% | 78.00% |
Transferred at Point in Time |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Revenue, percentage from products and services transferred to customers | 19.00% | 24.00% | 20.00% | 22.00% |

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