Basis of Presentation	3 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Commvault Systems, Inc. and its subsidiaries ("Commvault," "we," "us," "our," or the "Company") is a provider of cyber resiliency solutions designed to help the enterprise protect, secure, and recover their data, applications, and identity systems in a world of increasing cyber threats and attacks. Commvault’s offerings provide cyber resilience, including data protection, cyber recovery, data security, and governance, aiming to enable customers' continuous business. Our offerings are delivered through self-managed software, software-as-a-service ("SaaS"), integrated appliances, or managed by partners. Customers use our Commvault Cloud platform to help protect themselves from threats like ransomware and recover their data efficiently. The consolidated financial statements of Commvault as of June 30, 2026 and for the three months ended June 30, 2026 and 2025 are unaudited, and in the opinion of management, include all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results for the interim periods. Accordingly, they do not include all the information and footnotes required by U.S. generally accepted accounting principles ("GAAP") for complete financial statements and should be read in conjunction with the financial statements and notes in our Annual Report on Form 10-K for the fiscal year ended March 31, 2026. The results reported in these consolidated financial statements should not necessarily be taken as indicative of results that may be expected for the entire fiscal year. The preparation of consolidated financial statements and related disclosures in conformity with GAAP requires management to make judgments and estimates that affect the amounts reported in our consolidated financial statements and the accompanying notes. We base our estimates and judgments on historical experience and on various other assumptions that we believe are reasonable under the circumstances. The amounts of assets and liabilities reported in our consolidated balance sheets and the amounts of revenues and expenses reported for each of the periods presented are affected by estimates and assumptions, which are used for, but not limited to, the accounting for revenue recognition, income taxes and related reserves, deferred commissions, goodwill, and purchased intangible assets. Actual results could differ from those estimates. Reclassification of Prior Year Balances Certain prior year amounts have been reclassified for consistency with the current year presentation. Beginning in fiscal 2027, Customer support revenue has been further disaggregated between support associated with term-based software license arrangements ("Term-based support") and support associated with perpetual software license arrangements ("Perpetual support"). This reclassification has no impact on the amount of total revenues or net income. In addition, amortization of debt issuance costs, which was previously included within depreciation and amortization on the Consolidated Statements of Cash Flows, is now presented separately, and the noncash change in fair value of equity securities, which was previously presented separately, is now included within other as an adjustment to reconcile net income to net cash provided by operating activities. These reclassifications have no impact on the amount of cash flows from operating activities.

Commvault Systems, Inc. and its subsidiaries ("Commvault," "we," "us," "our," or the "Company") is a provider of cyber resiliency solutions designed to help the enterprise protect, secure, and recover their data, applications, and identity systems in a world of increasing cyber threats and attacks. Commvault’s offerings provide cyber resilience, including data protection, cyber recovery, data security, and governance, aiming to enable customers' continuous business. Our offerings are delivered through self-managed software, software-as-a-service ("SaaS"), integrated appliances, or managed by partners. Customers use our Commvault Cloud platform to help protect themselves from threats like ransomware and recover their data efficiently.

The consolidated financial statements of Commvault as of June 30, 2026 and for the three months ended June 30, 2026 and 2025 are unaudited, and in the opinion of management, include all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results for the interim periods. Accordingly, they do not include all the information and footnotes required by U.S. generally accepted accounting principles ("GAAP") for complete financial statements and should be read in conjunction with the financial statements and notes in our Annual Report on Form 10-K for the fiscal year ended March 31, 2026. The results reported in these consolidated financial statements should not necessarily be taken as indicative of results that may be expected for the entire fiscal year.

The preparation of consolidated financial statements and related disclosures in conformity with GAAP requires management to make judgments and estimates that affect the amounts reported in our consolidated financial statements and the accompanying notes. We base our estimates and judgments on historical experience and on various other assumptions that we believe are reasonable under the circumstances. The amounts of assets and liabilities reported in our consolidated balance sheets and the amounts of revenues and expenses reported for each of the periods presented are affected by estimates and assumptions, which are used for, but not limited to, the accounting for revenue recognition, income taxes and related reserves, deferred commissions, goodwill, and purchased intangible assets. Actual results could differ from those estimates.

Certain prior year amounts have been reclassified for consistency with the current year presentation. Beginning in fiscal 2027, Customer support revenue has been further disaggregated between support associated with term-based software license arrangements ("Term-based support") and support associated with perpetual software license arrangements ("Perpetual support"). This reclassification has no impact on the amount of total revenues or net income.

In addition, amortization of debt issuance costs, which was previously included within depreciation and amortization on the Consolidated Statements of Cash Flows, is now presented separately, and the noncash change in fair value of equity securities, which was previously presented separately, is now included within other as an adjustment to reconcile net income to net cash provided by operating activities. These reclassifications have no impact on the amount of cash flows from operating activities.