Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 05, 2020
Entity Registrant Name	Tortoise Acquisition Corp.
Entity Central Index Key	0001759631
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	Non-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	001-38823
Entity Interactive Data Current	Yes
Entity Incorporation State Country Code	DE
Class A Common Stock
Entity Common Stock, Shares Outstanding		23,300,917
Class B Common Stock
Entity Common Stock, Shares Outstanding		5,825,230