v3.26.3
Cover
Sep. 10, 2026
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 10, 2026
Entity File Number 001-42377
Entity Registrant Name Aldel Financial II Inc.
Entity Central Index Key 0002031561
Entity Tax Identification Number 98-1800702
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 104 S. Walnut Street
Entity Address, Address Line Two Unit 1A
Entity Address, City or Town Itasca
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60143
City Area Code 847
Local Phone Number 791 6817
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Ordinary Shares  
Document Information [Line Items]  
Title of 12(b) Security Ordinary Shares
Trading Symbol ALDF
Security Exchange Name NASDAQ
Warrants  
Document Information [Line Items]  
Title of 12(b) Security Warrants
Trading Symbol ALDF.W
Security Exchange Name NASDAQ
Units  
Document Information [Line Items]  
Title of 12(b) Security Units
Trading Symbol ALDF.U
Security Exchange Name NASDAQ