Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 14, 2022
Document Information [Line Items]
Document Type	10-Q
Document Period End Date	Sep. 30, 2022
Amendment Flag	false
Entity Central Index Key	0001848959
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Registrant Name	Decarbonization Plus Acquisition Corporation IV
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	E9
Entity File Number	001-40731
Entity Tax Identification Number	98-1585724
Entity Address, Address Line One	2744 Sand Hill Road
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Menlo Park
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94025
City Area Code	212
Local Phone Number	993-0076
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Shell Company	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Class A Ordinary Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		31,625,000
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	DCRD
Security Exchange Name	NASDAQ
Class B Ordinary Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,906,250
Units
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share and one-half of one warrant
Trading Symbol	DCRDU
Security Exchange Name	NASDAQ
Warrants
Document Information [Line Items]
Title of 12(b) Security	Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol	DCRDW
Security Exchange Name	NASDAQ