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Document and Entity Information
Oct. 26, 2021
Cover [Abstract]  
Entity Registrant Name QuantumScape Corp
Amendment Flag false
Entity Central Index Key 0001811414
Document Type 8-K
Document Period End Date Oct. 26, 2021
Entity Incorporation State Country Code DE
Entity File Number 001-39345
Entity Tax Identification Number 85-0796578
Entity Address, Address Line One 1730 Technology Drive
Entity Address, City or Town San Jose
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95110
City Area Code 408
Local Phone Number 452-2000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Security 12b Title Class A common stock, par value $0.0001 per share
Trading Symbol QS
Security Exchange Name NYSE
Entity Emerging Growth Company true
Entity Ex Transition Period false