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Earnings (Losses) per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net earnings (losses) attributable to Altria	$ 1,924	$ (952)	$ 1,943	$ 1,552	$ (1,809)	$ (2,600)	$ 1,996	$ 1,120	$ 4,467	$ (1,293)	$ 6,963
Less: Distributed and undistributed earnings attributable to share-based awards									(8)	(7)	(8)
Earnings (losses) for basic and diluted EPS									$ 4,459	$ (1,300)	$ 6,955
Weighted-average shares for basic EPS (in shares)									1,858	1,869	1,887
Plus: contingently issuable PSUs (in shares)									1	0	1
Weighted-average shares for diluted EPS (in shares)									1,859	1,869	1,888

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