Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 13, 2020
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Entity Registrant Name	Social Capital Hedosophia Holdings Corp. III
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Ex Transition Period	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	true
Entity Central Index Key	0001801170
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		82,800,000
Trading Symbol	IPOC
Title of 12(g) Security	Class A ordinary shares, par value $0.0001 per share
Security Exchange Name	NYSE
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		20,700,000
Unit of class A and one-third of redeemable warrant
Document Information [Line Items]
Trading Symbol	IPOC.U
Title of 12(g) Security	Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant
Security Exchange Name	NYSE
Unit of redeemable warrant
Document Information [Line Items]
Trading Symbol	IPOC WS
Title of 12(g) Security	Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Security Exchange Name	NYSE