Stock Warrants and Earnouts - Additional Information (Detail) - USD ($)				3 Months Ended
		Mar. 13, 2021	Mar. 12, 2021	Apr. 30, 2021	Apr. 30, 2020	Feb. 26, 2021
Adjustments in warrants				$ (9,237,000)	$ (535,000)
Number of days determining Earnout Triggering Event				10 days
Number of consecutive days determining Earnout Triggering Event				20 days
Class of warrants outstanding	[1]			38,761,031
Tranche Three [Member]
Earnout Shares			9,000,000
Common Stock [Member]
Stock that may be issued				27,000,000
Common Stock [Member] | Legacy Chargepoint [Member]
Class of warrants outstanding				36,402,503
Earnout Shares [Member]
Earnout liability		$ 743,700,000
Earnout liability fair value						$ 828,200,000
Issuance Of Earnout Shares			18,000,000
Stock issued during period, shares, acquisitions		17,539,657
Estimated fair value of earn out liability			$ 242.6
Business combination, stock issued			9,000,000
Redeemable Convertible Preferred Stock Warrants [Member] | Series B D E Preferred Stock [Member]
Class of warrants outstanding				2,358,528
Preferred Stock [Member] | Legacy Chargepoint [Member]
Class of warrants outstanding				2,358,528
Gain [Member] | Earnout Shares [Member]
Adjustments in warrants				$ 84,400,000
Earnout Triggering Event [Member] | Share Price Greater Or Equal 15 USD [Member]
Share price triggering Earnout			$ 15.00
Earnout Triggering Event [Member] | Share Price Greater Or Equal 20 USD [Member]
Share price triggering Earnout				$ 20.00
Triggering Share price			$ 20.00
Earnout Triggering Event [Member] | Common Stock [Member]
Threshold triggering Share price			$ 30.00
Earnout Triggering Event [Member] | Common Stock [Member] | Share Price Greater Or Equal 15 USD [Member]
Earnout triggering share price				15.00
Earnout Triggering Event [Member] | Common Stock [Member] | Share Price Greater Or Equal 30 USD [Member]
Triggering Share price				$ 30.00
Earnout Triggering Event [Member] | Earnout Shares [Member]
Stock issuable value			$ 501,100,000
Private Placement Warrants [Member]
Days from which Warrants are exercisable				30 years
Proceeds from warrants exercised				$ 73,300,000
Initial measurements of fair value of warrant liability				127,900,000
Fair value adjustment of warrants				45,400,000
Public Warrants [Member]
Initial measurements of fair value of warrant liability				153,700,000
Fair value adjustment of warrants				$ 1,600,000

[1] The shares (and the warrants’ exercise prices) subject to the Company’s Legacy common and preferred stock warrants were restated to reflect the exchange ratio of approximately 0.9966 established in the Merger Agreement as discussed in Note 3.