Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2022	May 23, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2022
Entity File Number	001-40784
Entity Registrant Name	BANNER ACQUISITION CORP.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-2670267
Entity Address, Address Line One	300 S 1350 E, 2nd Floor
Entity Address, City or Town	Lehi
Entity Address State Or Province	UT
Entity Address, Postal Zip Code	84043
City Area Code	801
Local Phone Number	447-1534
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
Entity Shell Company	true
Entity Central Index Key	0001852332
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Transition Report	false
Units, each consisting of one share of Class A Common Stock and one-half of one Warrant
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one share of Class A Common Stock, $0.0001 par value, and one-half of one redeemable warrant
Trading Symbol	BNNRU
Security Exchange Name	NASDAQ
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	BNNR
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		15,700,000
Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50
Document Information [Line Items]
Title of 12(b) Security	Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 per share
Trading Symbol	BNNRW
Security Exchange Name	NASDAQ
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,925,000