| Cover Page Cover Page | Jan. 27, 2021 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 27, 2021 |
| Entity Registrant Name | ALTRIA GROUP, INC. |
| Entity Incorporation, State or Country Code | VA |
| Entity File Number | 1-08940 |
| Entity Tax Identification Number | 13-3260245 |
| Entity Address, Address Line One | 6601 West Broad Street, |
| Entity Address, City or Town | Richmond, |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23230 |
| City Area Code | 804 |
| Local Phone Number | 274-2200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000764180 |
| Common Stock, $0.33 1/3 par value | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.33 1/3 par value |
| Trading Symbol | MO |
| Security Exchange Name | NYSE |
| 1.000% Notes due 2023 | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 1.000% Notes due 2023 |
| Trading Symbol | MO23A |
| Security Exchange Name | NYSE |
| 1.700% Notes due 2025 | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 1.700% Notes due 2025 |
| Trading Symbol | MO25 |
| Security Exchange Name | NYSE |
| 2.200% Notes due 2027 | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 2.200% Notes due 2027 |
| Trading Symbol | MO27 |
| Security Exchange Name | NYSE |
| 3.125% Notes due 2031 | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 3.125% Notes due 2031 |
| Trading Symbol | MO31 |
| Security Exchange Name | NYSE |
