| Document and Entity Information | Feb. 02, 2023 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001844817 |
| Current Fiscal Year End Date | --09-30 |
| Document Type | 8-K |
| Document Period End Date | Feb. 02, 2023 |
| Entity Registrant Name | Armada Acquisition Corp. I |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40742 |
| Entity Tax Identification Number | 85-3810850 |
| Entity Address, Address Line One | 1760 Market Street |
| Entity Address, Address Line Two | Suite 602 |
| Entity Address, City or Town | Philadelphia |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19103 |
| City Area Code | (215) |
| Local Phone Number | 543-6886 |
| Written Communications | false |
| 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 Share Of Common Stock And Onehalf Of One Redeemable Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 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 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common stock, par value $0.0001 per share |
| Trading Symbol | AACI |
| Security Exchange Name | NASDAQ |
| Warrants Each Exercisable For One Share Of Common Stock For 11.50 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each exercisable for one share of common stock for $11.50 per share |
| Trading Symbol | AACI W |
| Security Exchange Name | NASDAQ |
