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Common Stock Warrants - Narrative (Details) - shares	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Jan. 31, 2025
Equity [Abstract]
Warrants outstanding (in shares)	34,499,436		34,499,436
Warrants exercised (in shares)	0	0

X

- Definition

Warrants Exercised

+ References

No definition available.

+ Details

Name:	chpt_WarrantsExercised
Namespace Prefix:	chpt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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