Earnings (Losses) per Share (Basic and Diluted Earnings Per Share) (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net earnings (losses) attributable to Altria	$ (2,722)	$ (952)	$ 851	$ 2,543
Less: Distributed and undistributed earnings attributable to share-based awards	(2)	(1)	(8)	(6)
Earnings (losses) for basic EPS	(2,724)	(953)	843	2,537
Earnings (losses) for diluted EPS	$ (2,724)	$ (953)	$ 843	$ 2,537
Weighted-average shares for basic EPS (in shares)	1,842,000	1,858,000	1,849,000	1,858,000
Plus: contingently issuable performance stock units (in shares)	0	1,000	0	1,000
Weighted-average shares for diluted EPS (in shares)	1,842,000	1,859,000	1,849,000	1,859,000