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Contingencies (Medical Monitoring Class Actions Narrative) (Details) (Medical Monitoring Class Actions [Member], Donovan [Member], Medical Monitoring Class Actions [Member], USD $) | 3 Months Ended
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Mar. 31, 2015
Medical Monitoring Class Actions [Member] | Donovan [Member] | Medical Monitoring Class Actions [Member] |
Loss Contingencies [Line Items] |
Loss Contingency, Damages Sought, Value | $ 190,000,000 us-gaap_LossContingencyDamagesSoughtValue / dei_LegalEntityAxis = mo_DonovanMember / us-gaap_LitigationCaseAxis = mo_MedicalMonitoringClassActionsMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = mo_MedicalMonitoringClassActionsMember

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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