| Cover | Oct. 29, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This form was amended by changing the Purchase Price and by changing the Assignment Agreement to a Purchase Agreement. |
| Document Period End Date | Oct. 29, 2021 |
| Entity Registrant Name | AMERI METRO, INC. |
| Entity Central Index Key | 0001534155 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-54546 |
| Entity Tax Identification Number | 45-1877342 |
| Entity Address, Address Line One | 2575 Eastern Blvd. |
| Entity Address, Address Line Two | Suite 102 |
| Entity Address, City or Town | York |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 17402 |
| City Area Code | 717 |
| Local Phone Number | 434-0668 |
| Entity Information, Former Legal or Registered Name | N/A |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | ARMT |
| Security Exchange Name | NONE |
| Entity Emerging Growth Company | false |
