Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 16, 2021
Document Information Line Items
Entity Registrant Name	WALDENCAST ACQUISITION CORP.
Trading Symbol	WALD
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001840199
Entity Current Reporting Status	No
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	true
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-40207
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	98-1575727
Entity Address, Address Line One	10 Bank Street
Entity Address, Address Line Two	Suite 560
Entity Address, City or Town	White Plains
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10606
City Area Code	(917)
Local Phone Number	546-6828
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Class A Ordinary Shares
Document Information Line Items
Entity Common Stock, Shares Outstanding		34,500,000
Class B Ordinary Shares
Document Information Line Items
Entity Common Stock, Shares Outstanding		8,625,000