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Significant Customers	3 Months Ended
Significant Customers	Mar. 29, 2015
Segment Reporting [Abstract]
Significant Customers	Significant Customers Revenue from the U.S. Government, which includes foreign military sales, includes revenue from contracts for which the Company is the prime contractor as well as those for which the Company is a subcontractor and the ultimate customer is the U.S. Government. The KGS and US segments have substantial revenue from the U.S. Government. Sales to the U.S. Government amounted to approximately $116.3 million and $112.1 million, or 58% and 61% of total Kratos revenue, for the three months ended March 30, 2014 and March 29, 2015.