Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 14, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 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	Q3
Amendment Flag	false
Transition Report	false
Unit Each Consisting Of One Class Common Stock And One Third Redeemable 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 [Member]
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 [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,925,000