Cover - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
May 07, 2026 |
Sep. 30, 2025 |
|
| Cover [Abstract] | |||
| Document Type | 10-K | ||
| Document Annual Report | true | ||
| Document Period End Date | Mar. 31, 2026 | ||
| Document Transition Report | false | ||
| Entity File Number | 000-26251 | ||
| Entity Registrant Name | NETSCOUT SYSTEMS, INC. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 04-2837575 | ||
| Entity Address, Address Line One | 310 Littleton Road | ||
| Entity Address, City or Town | Westford | ||
| Entity Address, State or Province | MA | ||
| Entity Address, Postal Zip Code | 01886 | ||
| City Area Code | 978 | ||
| Local Phone Number | 614-4000 | ||
| Title of 12(b) Security | Common Stock, $0.001 par value per share | ||
| Trading Symbol | NTCT | ||
| Security Exchange Name | NASDAQ | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Document Financial Statement Error Correction | false | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 1,798,552,586 | ||
| Entity Common Stock, Shares Outstanding (in shares) | 71,495,215 | ||
| Documents Incorporated by Reference | Portions of the registrant's definitive Proxy Statement for the 2026 Annual Meeting of Stockholders to be filed with the U.S. Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K are incorporated by reference in Part III, Items 10-14 of this Annual Report on Form 10-K | ||
| Entity Central Index Key | 0001078075 | ||
| Current Fiscal Year End Date | --03-31 | ||
| Document Fiscal Year Focus | 2026 | ||
| Document Fiscal Period Focus | FY | ||
| Amendment Flag | false | ||
| Auditor Name | PricewaterhouseCoopers LLP | ||
| Auditor Location | Boston, Massachusetts | ||
| Auditor Firm Id | 238 | ||
| Auditor Opinion [Text Block] | Opinions on the Financial Statements and Internal Control over Financial Reporting We have audited the accompanying consolidated balance sheets of NetScout Systems, Inc. and its subsidiaries (the "Company") as of March 31, 2026 and 2025, and the related consolidated statements of operations, of comprehensive income (loss), of stockholders’ equity and of cash flows for each of the three years in the period ended March 31, 2026, including the related notes and financial statement schedule listed in the index appearing under Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of March 31, 2026, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of March 31, 2026 and 2025, and the results of its operations and its cash flows for each of the three years in the period ended March 31, 2026 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of March 31, 2026, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO. |