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Document and Entity Information
Apr. 12, 2023
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Apr. 12, 2023
Entity Registrant Name ATLANTIC COASTAL ACQUISITION CORP. II
Entity Incorporation, State or Country Code DE
Entity File Number 001-41224
Entity Tax Identification Number 87-1013956
Entity Address, Address Line One 6 St Johns Lane, Floor 5
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10013
City Area Code 248
Local Phone Number 890-7200
Written Communications false
Soliciting Material true
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag false
Entity Central Index Key 0001893219
Capital Units [Member]  
Document Information [Line Items]  
Title of 12(b) Security Units, each consisting of one share of Series A common stock, $0.0001 par value, andone-halfof one redeemable warrant
Trading Symbol ACABU
Security Exchange Name NASDAQ
Series A common stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Shares of Series A common stock included as part of the units
Trading Symbol ACAB
Security Exchange Name NASDAQ
Warrant [Member]  
Document Information [Line Items]  
Title of 12(b) Security Warrants included as part of the units, each whole warrant exercisable for one share of Series A common stock at an exercise price of $11.50
Trading Symbol ACABW
Security Exchange Name NASDAQ