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Commitments and Contingencies - Narrative (Details) $ in Millions	May 16, 2024 USD ($) action	Jul. 31, 2024 USD ($)	Jan. 31, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of actions filed | action	1
Letters of credit outstanding		$ 0.4	$ 30.4
Restricted cash, released	$ 30.0

X

- Definition

Loss Contingency, Number Of Actions Filed

+ References

No definition available.

+ Details

Name:	chpt_LossContingencyNumberOfActionsFiled
Namespace Prefix:	chpt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Restricted Cash, Released

+ References

No definition available.

+ Details

Name:	chpt_RestrictedCashReleased
Namespace Prefix:	chpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant