Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 21, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-08940
Entity Registrant Name	Altria Group, Inc.
Entity Incorporation, State or Country Code	VA
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		1,836,988,822
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000764180
Current Fiscal Year End Date	--12-31
Common Stock, $0.33 1/3 par value [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
Entity Information [Line Items]
Title of 12(b) Security	3.125% Notes due 2031
Trading Symbol	MO31
Security Exchange Name	NYSE