Significant Customers (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	$ 229.3	$ 235.2	$ 429.4	$ 488.5
Kratos Government Solutions
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	165.7	183.5	316.9	386.2
U.S. Government | Kratos Government Solutions
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	$ 123.0	$ 152.2	$ 239.3	$ 317.6
Sales to the U.S. Government - percentage of total revenue	54.00%	65.00%	56.00%	65.00%