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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Apr. 01, 2018
Disaggregation of Revenue [Line Items] |  |
Total Revenues | $ 160.4 | $ 143.0
Kratos Government Solutions |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 125.5 | 115.2
Kratos Government Solutions | U.S. Government |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 86.8 | 76.8
Kratos Government Solutions | International |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 24.9 | 21.0
Kratos Government Solutions | U.S. Commercial and other customers |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 13.8 | 17.4
Kratos Government Solutions | Fixed price |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 109.1 | 101.8
Kratos Government Solutions | Cost plus fee |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 9.2 | 7.2
Kratos Government Solutions | Time and materials |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 7.2 | 6.2
Unmanned Systems |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 34.9 | 27.8
Unmanned Systems | U.S. Government |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 30.1 | 24.2
Unmanned Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 4.5 | 3.6
Unmanned Systems | U.S. Commercial and other customers |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 0.3 | 0.0
Unmanned Systems | Fixed price |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 27.2 | 21.9
Unmanned Systems | Cost plus fee |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 7.4 | 5.5
Unmanned Systems | Time and materials |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | $ 0.3 | $ 0.4

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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