Entity Wide Disclosure on Geographic Areas, Assets in Foreign Countries

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- Definition

Entity Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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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.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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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.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Segment Information - Narrative (Details) $ in Millions	3 Months Ended								9 Months Ended	12 Months Ended
Segment Information - Narrative (Details) $ in Millions	Dec. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)	Oct. 01, 2017 USD ($)	Jun. 25, 2017 USD ($)	Mar. 26, 2017 USD ($)	Oct. 01, 2017 Segment	Dec. 30, 2018 USD ($) Segment	Dec. 31, 2017 USD ($)	Dec. 25, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment									2	3
Total revenues	$ 164.4	$ 159.4	$ 151.2	$ 143.0	$ 166.3	$ 157.1	$ 147.9	$ 132.0		$ 618.0	$ 603.3	$ 541.9
Percentage of foreign revenue to total revenue (as a percent)										19.00%	14.00%	15.00%
Unmanned Systems
Segment Reporting Information [Line Items]
Total revenues										$ 132.9
Loss accrual												$ 18.7
Kratos Government Solutions
Segment Reporting Information [Line Items]
Total revenues										485.1
Impairment of goodwill					24.2						$ 24.2
Business exit costs												9.2
Assets of foreign subsidiaries	$ 126.7				$ 116.7					126.7	116.7	113.7
Non-US
Segment Reporting Information [Line Items]
Total revenues										$ 114.3	$ 84.7	$ 80.1