Stock Warrants and Earnouts - Additional Information (Detail) - USD ($)					3 Months Ended			6 Months Ended
	Jul. 06, 2021	Jul. 01, 2021	Mar. 13, 2021	Mar. 12, 2021	Jul. 31, 2021	Apr. 30, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020	Jun. 04, 2021	Feb. 26, 2021	Jan. 31, 2021
Adjustments in warrants							$ 11,516,000	$ (9,237,000)	$ 10,981,000
Number of days determining Earnout Triggering Event								10 days
Number of consecutive days determining Earnout Triggering Event								20 days
Class of warrants outstanding					39,249,702			39,249,702				38,761,031
Warrants Exercised								(16,258,978)
Tranche Three [Member]
Earnout Shares				9,000,000
Common Stock [Member]
Stock that may be issued					27,000,000			27,000,000
Class of warrants outstanding					37,075,846			37,075,846
Common Stock [Member] | Legacy Chargepoint [Member]
Class of warrants outstanding					36,402,503			36,402,503
Warrants Exercised					587,880			1,685,185
Issuance of common stock upon exercise of warrants					558,100			1,480,080
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
Issuance Of Earnout Shares Upon Triggering Events Net of Tax Withholding				18,000,000
Earnout Shares [Member] | Merger Agreement [Member]
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			2,358,528
Preferred Stock [Member] | Legacy Chargepoint [Member]
Class of warrants outstanding					2,358,528			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
Share Price Triggering Earnout				15.00
Earnout Triggering Event [Member] | Share Price Greater Or Equal 20 USD [Member]
Share price triggering Earnout					$ 20.00			$ 20.00
Triggering Share price				$ 20.00
Share Price Triggering Earnout					20.00			$ 20.00
Earnout Triggering Event [Member] | Share Price Greater Or Equal 30 USD [Member] | Tranche Three [Member]
Share price triggering Earnout		$ 30.00
Issuance Of Earnout Shares		8,773,596
Earnout Shares								9,000,000
Share Price Triggering Earnout		$ 30.00
Issuance Of Earnout Shares Upon Triggering Events Net of Tax Withholding		8,773,596
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			$ 15.00
Earnout Triggering Event [Member] | Common Stock [Member] | Share Price Greater Or Equal 30 USD [Member]
Triggering Share price					$ 30.00			$ 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								$ 117,600,000
Initial measurements of fair value of warrant liability								127,900,000
Fair value adjustment of warrants					$ 3,800,000			$ 49,200,000
Class of warrants outstanding					2,173,856			2,173,856
Warrants Exercised								(4,347,712)
Public Warrants [Member]
Initial measurements of fair value of warrant liability								$ 153,700,000
Fair value adjustment of warrants					$ 14,300,000			$ 15,900,000
Class of warrants outstanding					0			0
Warrants Exercised								(10,226,081)
Class of warrants reedemption price per warrant	0.01
Number of warrants called for redemption										244,481
Class of warrants redeemed Or called during period	244,481