v3.25.3
Document and Entity Information
Oct. 19, 2025
Document And Entity Information [Line Items]  
Entity Address, Region GRAND CAYMAN
Amendment Flag false
Entity Central Index Key 0002044009
Document Type 8-K
Document Period End Date Oct. 19, 2025
Entity Registrant Name Armada Acquisition Corp. II
Entity Incorporation State Country Code E9
Entity File Number 001-42661
Entity Tax Identification Number 98-1815892
Entity Address, Address Line One 382 NE 191st St
Entity Address, Address Line Two Suite 52895
Entity Address, City or Town Miami
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33179-3899
City Area Code (786)
Local Phone Number 548-1886
Written Communications true
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Units Each Consisting Of One Class A Ordinary Share And One Half Of One Redeemable Warrant [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Trading Symbol AACIU
Security Exchange Name NASDAQ
Capital Unit, Class A [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Class A ordinary shares, par value $0.0001 per share
Trading Symbol AACI
Security Exchange Name NASDAQ
Warrants Each Exercisable For One Class A Ordinary Share At An Exercise Price Of 11.50 Per Share [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Warrants, each exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol AACIW
Security Exchange Name NASDAQ