Goodwill, Access Of Fair Value Over Carrying Value, Percentage

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (a,h)

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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- Definition

Amount of other (increase) decrease of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Subparagraph (g)

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- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of transfers of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized among segments.

+ References

No definition available.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Glossary Impairment

-URI http://asc.fasb.org/extlink&oid=6515133

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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Goodwill and Other Intangible Assets - Goodwill (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Nov. 02, 2014	Dec. 28, 2014 Segment	Dec. 28, 2014 Segment	Dec. 29, 2013 Segment	Jun. 30, 2012	Dec. 30, 2012	Jun. 24, 2012	Dec. 27, 2015
Goodwill [Line Items]
Number of principal reportable segments		3us-gaap_NumberOfReportableSegments	3us-gaap_NumberOfReportableSegments	2us-gaap_NumberOfReportableSegments
Goodwill impairments	$ 0us-gaap_GoodwillImpairmentLoss
Goodwill [Roll Forward]
December 30, 2012 Balance prior to retrospective adjustments						596,500,000us-gaap_GoodwillGross
Retrospective adjustments				(100,000)us-gaap_GoodwillOtherChanges
Beginning Balance			596,400,000us-gaap_Goodwill	596,400,000us-gaap_Goodwill
2013 reorganization				0us-gaap_GoodwillTransfers
2014 transactions			0us-gaap_GoodwillPeriodIncreaseDecrease
Ending Balance		596,400,000us-gaap_Goodwill	596,400,000us-gaap_Goodwill	596,400,000us-gaap_Goodwill
Accumulated impairment losses		247,400,000	247,400,000
Public Safety & Security
Goodwill [Roll Forward]
December 30, 2012 Balance prior to retrospective adjustments						35,600,000
Retrospective adjustments				0
Beginning Balance			35,600,000	35,600,000
2013 reorganization				0
2014 transactions			0
Ending Balance		35,600,000	35,600,000	35,600,000
Accumulated impairment losses		18,300,000	18,300,000
Kratos Unmanned Systems (US)
Goodwill [Roll Forward]
December 30, 2012 Balance prior to retrospective adjustments						0
Retrospective adjustments
Beginning Balance			97,300,000	0
2013 reorganization				97,300,000
2014 transactions			0
Ending Balance		97,300,000	97,300,000	97,300,000
Accumulated impairment losses		13,800,000	13,800,000
Kratos Government Solutions (KGS)
Goodwill [Line Items]
Number of operating segments			5
Number of principal reportable segments		2
Goodwill impairments						82,000,000
Percentage by which goodwill fair value exceeded carrying value					7.40%
Goodwill [Roll Forward]
December 30, 2012 Balance prior to retrospective adjustments						560,900,000
Retrospective adjustments				(100,000)
Beginning Balance			463,500,000	560,800,000
2013 reorganization				(97,300,000)
2014 transactions			0
Ending Balance		463,500,000	463,500,000	463,500,000		560,800,000
Accumulated impairment losses		215,300,000	215,300,000
Discontinued operations
Goodwill [Line Items]
Goodwill impairments							1,500,000
Discontinued operations \| Integral Systems, Inc.
Goodwill [Line Items]
Goodwill impairments					1,500,000
Anticipated in the future
Goodwill [Line Items]
Goodwill impairments								596,400,000
Long-lived intangibles								$ 52,300,000