Significant Customers (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	$ 226.4	$ 276.3	$ 714.9	$ 705.6
Kratos Government Solutions
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	174.6	223.5	560.8	568.2
U.S. Government | Kratos Government Solutions
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	$ 143.4	$ 162.9	$ 460.9	$ 443.8
Sales to the U.S. Government - percentage of total revenue	63.00%	59.00%	64.00%	63.00%