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v3.21.1

Revenue - Performance Obligations (Detail) | 12 Months Ended
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Mar. 31, 2021
Software Licenses |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Performance obligation, expected payment terms | 90 days
Appliances |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Performance obligation, expected payment terms | 90 days
Other Professional Services (except for education services) |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Performance obligation, expected payment terms | 90 days
Education Services |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |
Performance obligation, expected payment terms | 90 days

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- Definition Revenue, Performance Obligation, Description Of Payment Terms, Period + References No definition available. + Details
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Namespace Prefix: | cvlt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ProductOrServiceAxis=cvlt_SoftwareLicensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=cvlt_SoftwareAppliancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=cvlt_ProfessionalServicesOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=cvlt_ProfessionalServicesEducationServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |