Significant Customers (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	$ 200.1	$ 252.8
Kratos Government Solutions
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	151.2	202.2
U.S. Government | Kratos Government Solutions
Revenue, Major Customer [Line Items]
Sales to the U.S. Government - amount	$ 116.3	$ 160.7
Sales to the U.S. Government - percentage of total revenue	58.00%	64.00%