Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 27, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies All references to the “Company” and “Kratos” refer to Kratos Defense & Security Solutions, Inc., a Delaware corporation, and its subsidiaries. (a) Basis of Presentation The information as of March 27, 2022 and for the three months ended March 27, 2022 and March 28, 2021 is unaudited. The condensed consolidated balance sheet as of December 26, 2021 was derived from the Company’s audited consolidated financial statements at that date. In the opinion of management, these unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the Company’s financial position, results of operations and cash flows for the interim periods presented. The results have been prepared in accordance with the instructions to Form 10-Q and do not necessarily include all information and footnotes necessary for presentation in accordance with accounting principles generally accepted in the U.S. (“GAAP”). These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the related notes included in the Company’s audited annual consolidated financial statements for the fiscal year ended December 26, 2021, included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 22, 2022 (the “Form 10-K”). Interim operating results are not necessarily indicative of operating results expected in subsequent periods or for the year as a whole. (b) Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company, its 100% owned subsidiaries and its majority owned subsidiary, KTT Core, which is 80.1% owned by the Company. All inter-company transactions have been eliminated in consolidation. Noncontrolling interest consists of the remaining 19.9% interest in KTT Core. See Note 12 for further information related to the redeemable noncontrolling interest. (c) Fiscal Year The Company has a 52/53 week fiscal year ending on the last Sunday of the calendar year. The three month periods ended March 27, 2022 and March 28, 2021 consisted of 13-week periods. There are 52 calendar weeks in the fiscal years ending on December 25, 2022 and December 26, 2021. (d) Accounting Estimates There have been no significant changes in the Company’s accounting estimates for the three months ended March 27, 2022 as compared to the accounting estimates described in the Annual Report on Form 10-K. (e) Accounting Standards Updates In October 2021, the FASB issued ASU 2021-08 (“ASU 2021-08”), Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires entities to recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with ASC 2014-09, Revenue from Contracts with Customers (Topic 606). The update will generally result in an entity recognizing contract assets and contract liabilities at amounts consistent with those recorded by the acquiree immediately before the acquisition date rather than at fair value. The new standard is effective on a prospective basis for fiscal years beginning after December 15, 2022, with early adoption permitted. The Company has adopted the new standard effective December 26, 2021. The adoption of the new standard did not have an impact on the Company’s consolidated financial statements. (f) Fair Value of Financial Instruments The carrying amounts and the related estimated fair values of the Company’s long-term debt financial instruments not measured at fair value on a recurring basis at March 27, 2022 and December 26, 2021 are presented in Note 10. The carrying value of all other financial instruments, including cash equivalents, accounts receivable, unbilled receivables, accounts payable, accrued expenses, billings in excess of cost and earnings on uncompleted contracts, income taxes payable and short-term debt, approximated their estimated fair values at March 27, 2022 and December 26, 2021 due to the short-term nature of these instruments.