| Cover | Dec. 17, 2021 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 17, 2021 |
| Entity File Number | 001-40742 |
| Entity Registrant Name | Armada Acquisition Corp. I |
| Entity Central Index Key | 0001844817 |
| Entity Tax Identification Number | 85-3810850 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 2005 Market Street |
| Entity Address, Address Line Two | Suite 3120 |
| Entity Address, City or Town | Philadelphia |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19103 |
| City Area Code | (212) |
| Local Phone Number | 543-6886 |
| Written Communications | true |
| Soliciting Material | true |
| 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 |
| Units, each consisting of one share of common stock, $0.0001 par value, and one-half of one redeemable warrant | |
| Title of 12(b) Security | Units, each consisting of one share of common stock, $0.0001 par value, and one-half of one redeemable warrant |
| Trading Symbol | AACI.U |
| Security Exchange Name | NASDAQ |
| Common Stock, par value $0.0001 per share | |
| Title of 12(b) Security | Common stock, par value $0.0001 per share |
| Trading Symbol | AACI |
| Security Exchange Name | NASDAQ |
| Warrants, each exercisable for one share Common Stock for $11.50 per share | |
| Title of 12(b) Security | Warrants, each exercisable for one share of common stock for $11.50 per share |
| Trading Symbol | AACI W |
| Security Exchange Name | NASDAQ |
