Acquisitions - Contingent Acquisition Consideration (Details) (DEI Services Corporation, USD $) In Millions, unless otherwise specified	1 Months Ended
Apr. 30, 2012	Sep. 29, 2013
DEI Services Corporation
Business Acquisition, Contingent Consideration [Line Items]
Cumulative amount of contingent consideration paid		$ 5.0
Cash payments	$ 2.1

Cumulative amount of contingent consideration paid to date

No definition available.

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Namespace Prefix:	ktos_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant