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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions | Mar. 29, 2020 | Dec. 29, 2019
--- | --- | ---
Goodwill [Line Items] |  |
Gross value | $ 716.6 | $ 708.9
Less accumulated impairment | 253.3 | 253.3
Net | 463.3 | 455.6
Kratos Government Solutions |  |
Goodwill [Line Items] |  |
Gross value | 597.8 | 597.8
Less accumulated impairment | 239.5 | 239.5
Net | 358.3 | 358.3
Unmanned Systems |  |
Goodwill [Line Items] |  |
Gross value | 118.8 | 111.1
Less accumulated impairment | 13.8 | 13.8
Net | $ 105.0 | $ 97.3

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