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Segment Reporting (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Schedule of Pre-tax Tobacco and Health Litigation Items [Line Items] |  |
Loss Contingency Accrual, Provision | $ 43 us-gaap_LossContingencyAccrualProvision | $ 4 us-gaap_LossContingencyAccrualProvision
Engle Progeny Cases, Federal [Member] |  |
Schedule of Pre-tax Tobacco and Health Litigation Items [Line Items] |  |
Loss Contingency Accrual, Provision | 43 us-gaap_LossContingencyAccrualProvision / us-gaap_LossContingenciesByNatureOfContingencyAxis = mo_EngleProgenyCasesFederalMember | 0 us-gaap_LossContingencyAccrualProvision / us-gaap_LossContingenciesByNatureOfContingencyAxis = mo_EngleProgenyCasesFederalMember
Engle Progeny Cases, Federal [Member] | Florida Engle [Member] |  |
Schedule of Pre-tax Tobacco and Health Litigation Items [Line Items] |  |
Federal Engle Cases Resolved | 415 mo_FederalEngleCasesResolved / us-gaap_LitigationCaseAxis = mo_FloridaEngleMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = mo_EngleProgenyCasesFederalMember |
Engle Progeny Cases, Federal [Member] | Florida Engle [Member] | PM USA [Member] |  |
Schedule of Pre-tax Tobacco and Health Litigation Items [Line Items] |  |
Loss Contingency Accrual, Provision | $ 43 us-gaap_LossContingencyAccrualProvision / dei_LegalEntityAxis = mo_PhilipMorrisUSAMember / us-gaap_LitigationCaseAxis = mo_FloridaEngleMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = mo_EngleProgenyCasesFederalMember |

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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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