Description of Business	3 Months Ended
Sep. 29, 2023
Accounting Policies [Abstract]
Description of Business	Description of BusinessMercury Systems, Inc. is a technology company that delivers processing power for the most demanding aerospace and defense missions. Headquartered in Andover, Massachusetts, the Company's end-to-end processing platform enables a broad range of aerospace and defense programs, optimized for mission success in some of the most challenging and demanding environments. Processing technologies that comprise the Company's platform include signal solutions, display, software applications, networking, storage and secure processing. The Company's innovative solutions are mission-ready, trusted and secure, software-defined and open and modular (the Company's differentiators), to meet customers’ most-pressing high-tech needs, including those specific to the defense community.

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org//275/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 10
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482861/275-10-50-1

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