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Recent Accounting Guidance Not Yet Adopted (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Other assets | $ 468 us-gaap_OtherAssetsNoncurrent | $ 483 us-gaap_OtherAssetsNoncurrent
Accounting Standards Update 2015-03 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Other assets | $ 79 us-gaap_OtherAssetsNoncurrent / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = mo_AccountingStandardsUpdate201503Member | $ 83 us-gaap_OtherAssetsNoncurrent / us-gaap_AdjustmentsForNewAccountingPronouncementsAxis = mo_AccountingStandardsUpdate201503Member

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- Definition Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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