Quarterly Financial Data (Unaudited) (EPS attributable to Altria Group, Inc.) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Net revenues	$ 6,114	$ 6,837	$ 6,305	$ 6,108	$ 6,101	$ 6,729	$ 6,663	$ 6,083	$ 25,364	$ 25,576	$ 25,744
Gross profit	2,922	3,255	3,141	2,936	2,902	3,171	3,114	2,776	12,254	11,963	11,572
Net earnings	1,251	1,944	1,877	1,895	4,968	1,867	1,990	1,402	6,967	10,227	14,244
Net earnings attributable to Altria	$ 1,250	$ 1,943	$ 1,876	$ 1,894	$ 4,966	$ 1,866	$ 1,989	$ 1,401	$ 6,963	$ 10,222	$ 14,239
Basic EPS attributable to Altria (in usd per share)	$ 0.67	$ 1.03	$ 0.99	$ 1.00					$ 3.69	$ 5.31	$ 7.28
Diluted EPS attributable to Altria (in usd per share)	$ 0.66	$ 1.03	$ 0.99	$ 1.00					$ 3.68	$ 5.31	$ 7.28
Basic and diluted EPS attributable to Altria (usd per share)					$ 2.60	$ 0.97	$ 1.03	$ 0.72