| Cover | Nov. 20, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 20, 2024 |
| Entity File Number | 001-41144 |
| Entity Registrant Name | ATHENA TECHNOLOGY ACQUISITION CORP. II |
| Entity Central Index Key | 0001882198 |
| Entity Tax Identification Number | 87-2447308 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 442 5th Avenue |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10018 |
| City Area Code | 970 |
| Local Phone Number | 925-1572 |
| 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 |
| Units, each consisting of one share of Class A Common Stock, par value $0.0001 per share, and one-half of one Redeemable Warrant | |
| Title of 12(b) Security | Units, each consisting of one share of Class A Common Stock, par value $0.0001 per share, and one-half of one Redeemable Warrant |
| Trading Symbol | ATEK.U |
| Security Exchange Name | NYSEAMER |
| Shares of Class A Common Stock, par value $0.0001 per share, included as part of the units | |
| Title of 12(b) Security | Shares of Class A Common Stock, par value $0.0001 per share, included as part of the units |
| Trading Symbol | ATEK |
| Security Exchange Name | NYSEAMER |
| Redeemable Warrants, each exercisable for one share of Class A Common Stock for $11.50 per share | |
| Title of 12(b) Security | Redeemable Warrants, each exercisable for one share of Class A Common Stock for $11.50 per share |
| Trading Symbol | ATEK WS |
| Security Exchange Name | NYSEAMER |
