Description of Business	6 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]
Description of Business	Description of Business Mercury Systems, Inc. is a leading high-tech commercial provider of more affordable secure and sensor processing subsystems designed and made in the U.S.A. for critical defense and intelligence applications. The Company delivers innovative solutions, rapid time-to-value and service and support to its defense prime contractor customers. The Company’s products and solutions have been deployed in more than 300 programs with over 25 different defense prime contractors. Key programs include Aegis, Patriot, Surface Electronic Warfare Improvement Program ("SEWIP"), Gorgon Stare, Predator, F-35 and Reaper. The Company’s organizational structure allows it to deliver capabilities that combine technology building blocks and deep domain expertise in the defense sector. The Company believes its total portfolio of services and solutions is unique in the industry for a commercial company. The Company's goal is to grow and build on its position as a critical component of the defense industrial base and become the leading provider of open and affordable secure and sensor processing subsystems. The Mercury Commercial Electronics (“MCE”) operating segment designs, develops and builds open sensor processing products and subsystems that include embedded processing modules and subsystems, radio frequency (“RF”) and microwave multi-function assemblies as well as subsystems, and RF and microwave components. The Mercury Defense Systems (“MDS”) operating segment provides significant capabilities relating to pre-integrated, open, affordable electronic warfare ("EW"), electronic attack ("EA") and electronic counter measure ("ECM") subsystems and significant capabilities in signals intelligence ("SIGINT"), electro-optical/infrared ("EO/IR") processing technologies and radar environment test and simulation systems. In June 2014, the Company initiated a plan to divest the Mercury Intelligence Systems (“MIS”) operating segment, based on the Company's strategic direction and investment priorities focusing on its core business. As a result, the Company's MIS operating segment met the “held for sale” criteria in accordance with Financial Accounting Standard Boards (“FASB”) Accounting Standards Codification (“ASC”) 205, Presentation of Financial Statements, (“FASB ASC 205”) as of June 30, 2014 and all reporting periods thereafter (see Note C to the Consolidated Financial Statements). The consolidated financial statements, excluding the statements of cash flows, and the notes to the consolidated financial statements were restated for all periods presented to reflect the discontinuation of the MIS operating segment, in accordance with FASB ASC 205. On January 23, 2015, the Company completed the sale of the MIS operating segment.

Description of Business

Mercury Systems, Inc. is a leading high-tech commercial provider of more affordable secure and sensor processing subsystems designed and made in the U.S.A. for critical defense and intelligence applications. The Company delivers innovative solutions, rapid time-to-value and service and support to its defense prime contractor customers. The Company’s products and solutions have been deployed in more than 300 programs with over 25 different defense prime contractors. Key programs include Aegis, Patriot, Surface Electronic Warfare Improvement Program ("SEWIP"), Gorgon Stare, Predator, F-35 and Reaper. The Company’s organizational structure allows it to deliver capabilities that combine technology building blocks and deep domain expertise in the defense sector. The Company believes its total portfolio of services and solutions is unique in the industry for a commercial company.

The Company's goal is to grow and build on its position as a critical component of the defense industrial base and become the leading provider of open and affordable secure and sensor processing subsystems. The Mercury Commercial Electronics (“MCE”) operating segment designs, develops and builds open sensor processing products and subsystems that include embedded processing modules and subsystems, radio frequency (“RF”) and microwave multi-function assemblies as well as subsystems, and RF and microwave components. The Mercury Defense Systems (“MDS”) operating segment provides significant capabilities relating to pre-integrated, open, affordable electronic warfare ("EW"), electronic attack ("EA") and electronic counter measure ("ECM") subsystems and significant capabilities in signals intelligence ("SIGINT"), electro-optical/infrared ("EO/IR") processing technologies and radar environment test and simulation systems.

In June 2014, the Company initiated a plan to divest the Mercury Intelligence Systems (“MIS”) operating segment, based on the Company's strategic direction and investment priorities focusing on its core business. As a result, the Company's MIS operating segment met the “held for sale” criteria in accordance with Financial Accounting Standard Boards (“FASB”) Accounting Standards Codification (“ASC”) 205, Presentation of Financial Statements, (“FASB ASC 205”) as of June 30, 2014 and all reporting periods thereafter (see Note C to the Consolidated Financial Statements). The consolidated financial statements, excluding the statements of cash flows, and the notes to the consolidated financial statements were restated for all periods presented to reflect the discontinuation of the MIS operating segment, in accordance with FASB ASC 205. On January 23, 2015, the Company completed the sale of the MIS operating segment.