Description of Business	9 Months Ended
Mar. 31, 2016
Accounting Policies [Abstract]
Description of Business	Description of Business Mercury Systems, Inc. (the "Company" or "Mercury") is a leading commercial provider of secure processing subsystems designed and made in the U.S.A. Optimized for customer and mission success, Mercury's solutions power a wide variety of critical defense and intelligence programs. Headquartered in Chelmsford, Massachusetts, Mercury is pioneering a next-generation defense electronics business model specifically designed to meet the industry's current and emerging technology and business needs. The Company delivers affordable 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'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 affordable secure 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, significant capabilities in signals intelligence ("SIGINT"), electro-optical/infrared ("EO/IR") and secure 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. On January 23, 2015, the Company completed the sale of the MIS operating segment. See Note M to the consolidated financial statements.

Description of Business

Mercury Systems, Inc. (the "Company" or "Mercury") is a leading commercial provider of secure processing subsystems designed and made in the U.S.A. Optimized for customer and mission success, Mercury's solutions power a wide variety of critical defense and intelligence programs. Headquartered in Chelmsford, Massachusetts, Mercury is pioneering a next-generation defense electronics business model specifically designed to meet the industry's current and emerging technology and business needs. The Company delivers affordable 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'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 affordable secure 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, significant capabilities in signals intelligence ("SIGINT"), electro-optical/infrared ("EO/IR") and secure 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. On January 23, 2015, the Company completed the sale of the MIS operating segment. See Note M to the consolidated financial statements.