Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 10, 2020
Document Information [Line Items]
Entity Registrant Name	CF Finance Acquisition Corp.
Entity Central Index Key	0001728041
Document Type	10-Q
Document Period End Date	Jun. 30, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Reporting Status Current	Yes
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Filer Category	Accelerated Filer
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2020
Entity Shell Company	true
Entity File Number	001-38759
Entity Tax Identification Number	47-3806343
Entity Address, Address Line One	110 East 59th Street
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10022
City Area Code	212
Local Phone Number	938-5000
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Common Stock Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		28,264,713
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	CFFA
Security Exchange Name	NASDAQ
Common Stock Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,064,603
Common Class A Units [Member]
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one share of Class A common stock and three-quarters of one redeemable warrant
Trading Symbol	CFFAU
Security Exchange Name	NASDAQ
Common Class A Warrant [Member]
Document Information [Line Items]
Title of 12(b) Security	Redeemable warrants, exercisable for Class A common stock at an exercise price of $11.50 per share
Trading Symbol	CFFAW
Security Exchange Name	NASDAQ