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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Data [Abstract]
Net revenues	$ 6,101	$ 6,729	$ 6,663	$ 6,083	$ 6,252	$ 6,905	$ 6,521	$ 6,066	$ 25,576	$ 25,744	$ 25,434
Gross profit	2,870	3,183	3,119	2,779	2,828	3,150	2,957	2,656	11,951	11,591	11,114
Net earnings	4,968	1,867	1,990	1,402	10,278	1,094	1,654	1,218	10,227	14,244	5,243
Net earnings attributable to Altria Group, Inc.	$ 4,966	$ 1,866	$ 1,989	$ 1,401	$ 10,276	$ 1,093	$ 1,653	$ 1,217	$ 10,222	$ 14,239	$ 5,241
Basic and diluted EPS attributable to Altria Group, Inc. (usd per share)	$ 2.60	$ 0.97	$ 1.03	$ 0.72	$ 5.27	$ 0.56	$ 0.84	$ 0.62	$ 5.31	$ 7.28	$ 2.67