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v3.21.2

Commitments and Contingencies - Additional Information (Detail) $ in Millions | Jul. 31, 2021 USD ($)
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Purchase Commitment [Member] |
Commitments and Contingencies (Details) [Line Items] |
Purchase commitments for goods and services | $ 133.7

X
- References No definition available. + Details
Name: | chpt_CommitmentsandContingenciesDetailsLineItems
Namespace Prefix: | chpt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=us-gaap_PurchaseCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |