Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 28, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39741
Entity Registrant Name	REDBOX ENTERTAINMENT INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-2157010
Entity Address, Address Line One	1 Tower Lane
Entity Address, Address Line Two	Suite 800,
Entity Address, City or Town	Oakbrook Terrace
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60181
City Area Code	630
Local Phone Number	756-8000
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Central Index Key	0001820201
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Public Float			$ 143,175,000
Auditor Name	GRANT THORNTON LLP
Auditor Firm ID	248
Auditor Location	Chicago, IL
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A common stock, $0.001 Par Value per Share
Trading Symbol	RDBX
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		12,618,516
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		32,770,000
Warrants to purchase Class A common stock
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase Class A common stock
Trading Symbol	RDBXW
Security Exchange Name	NASDAQ