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Cover Page
Oct. 28, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Oct. 28, 2025
Entity Registrant Name COMMVAULT SYSTEMS, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 1-33026
Entity Tax Identification Number 22-3447504
Entity Address, Address Line One 1 Commvault Way
Entity Address, City or Town Tinton Falls
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07724
City Area Code 732
Local Phone Number 870-4000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value per share
Trading Symbol CVLT
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001169561
Amendment Flag false