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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, 2018 | Mar. 31, 2017
Earnings Per Share [Abstract] |  |
Net earnings attributable to Altria Group, Inc. | $ 1,894 | $ 1,401
Less: Distributed and undistributed earnings attributable to share-based awards | (2) | (2)
Earnings for basic and diluted EPS | $ 1,892 | $ 1,399
Weighted-average shares for basic and diluted EPS | 1,899 | 1,939

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