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Revenue Recognition - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Sep. 25, 2022 | Jun. 26, 2022 | Sep. 26, 2021 | Sep. 25, 2022 | Sep. 26, 2021 | Dec. 26, 2021
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |  |  |  |  |  |
Contract assets, net change |  |  |  |  | $ 27.7 |  |
Contract liabilities, net change |  |  |  |  | (9.2) |  |
Revenue recognized |  | $ 6.6 |  | $ 1.8 | 42.6 | $ 24.6 |
Contract assets |  | 218.5 |  |  | 218.5 |  | $ 190.8
Litigation related charges |  |  | $ 5.5 |  | 5.5 | $ 0.0 |
Payments for legal settlements |  | 3.7 |  |  |  |  |
Unmanned Systems |  |  |  |  |  |  |
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |  |  |  |  |  |
Negotiation and settlement with the customer |  |  | $ 5.6 |  |  |  |
Litigation related charges |  |  |  |  | 5.5 |  |
Unbilled Revenues | T for C |  |  |  |  |  |  |
Revenue Recognition, Multiple-deliverable Arrangements [Line Items] |  |  |  |  |  |  |
Contract assets |  | $ 4.8 |  |  | 4.8 |  |
Amount agreed to settlement | $ 6.0 |  |  |  |  |  |
Negotiation and settlement with the customer |  |  |  |  | $ 4.8 |  |

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