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Earnings Per Share (Basic and Diluted Earnings Per Share) (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Earnings Per Share [Abstract] |  |
Net earnings attributable to Altria | $ 1,552 | $ 1,120
Less: Distributed and undistributed earnings attributable to share-based awards | (2) | (2)
Earnings for basic and diluted EPS | $ 1,550 | $ 1,118
Weighted-average shares for basic and diluted EPS (in shares) | 1,858 | 1,874

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