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Unbilled Receivables - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 04, 2021 | Jul. 04, 2021 | Dec. 31, 2020
Contracts In Process [Line Items] |  |  |
Net unbilled receivables |  | $ 7,923 | $ 8,024
Large International Wheel Armored Vehicle | Combat Systems |  |  |
Contracts In Process [Line Items] |  |  |
Net unbilled receivables |  | 1,800 | $ 2,800
Progress payments received | $ 1,000 | $ 1,500 |

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