Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 07, 2020
Entity Registrant Name	Spartan Energy Acquisition Corp.
Entity Central Index Key	0001720990
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Filer Number	001-38625
Entity Interactive Data Current	Yes
Entity Incorporation State Country Code	DE
Class A Common Stock
Entity Common Stock, Shares Outstanding		55,200,000
Class B Common Stock
Entity Common Stock, Shares Outstanding		13,800,000