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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions | Jul. 01, 2018 | Dec. 31, 2017
--- | --- | ---
Goodwill [Line Items] |  |
Gross value | $ 679.0 | $ 679.0
Less accumulated impairment | 253.3 | 253.3
Net | 425.7 | 425.7
Kratos Government Solutions |  |
Goodwill [Line Items] |  |
Gross value | 567.9 | 567.9
Less accumulated impairment | 239.5 | 239.5
Net | 328.4 | 328.4
Unmanned Systems |  |
Goodwill [Line Items] |  |
Gross value | 111.1 | 111.1
Less accumulated impairment | 13.8 | 13.8
Net | $ 97.3 | $ 97.3

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