| Cover | Oct. 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 28, 2020 |
| Entity File Number | 001-38075 |
| Entity Registrant Name | ANTERO MIDSTREAM CORPORATION |
| Entity Central Index Key | 0001623925 |
| Entity Tax Identification Number | 61-1748605 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1615 Wynkoop Street |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80202 |
| City Area Code | 303 |
| Local Phone Number | 357-7310 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 Per Share |
| Trading Symbol | AM |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
