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Segment Reporting (Schedule of Pre-tax Tobacco and Health Litigation Charges) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |  |
Loss Contingency Accrual, Provision | $ 44 us-gaap_LossContingencyAccrualProvision | $ 22 us-gaap_LossContingencyAccrualProvision | $ 5 us-gaap_LossContingencyAccrualProvision
Smokeable Products [Member] |  |  |
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |  |
Loss Contingency Accrual, Provision | 27 us-gaap_LossContingencyAccrualProvision / us-gaap_StatementBusinessSegmentsAxis = mo_SmokeableProductsMember | 18 us-gaap_LossContingencyAccrualProvision / us-gaap_StatementBusinessSegmentsAxis = mo_SmokeableProductsMember | 4 us-gaap_LossContingencyAccrualProvision / us-gaap_StatementBusinessSegmentsAxis = mo_SmokeableProductsMember
Corporate, Non-Segment [Member] |  |  |
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |  |
Loss Contingency Accrual, Provision | 15 us-gaap_LossContingencyAccrualProvision / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | 0 us-gaap_LossContingencyAccrualProvision / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | 0 us-gaap_LossContingencyAccrualProvision / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Interest Expense [Member] |  |  |
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |  |
Interest and other debt expense, net | $ 2 mo_CommitmentsandContingenciesAccruedInterest / us-gaap_NatureOfExpenseAxis = us-gaap_InterestExpenseMember | $ 4 mo_CommitmentsandContingenciesAccruedInterest / us-gaap_NatureOfExpenseAxis = us-gaap_InterestExpenseMember | $ 1 mo_CommitmentsandContingenciesAccruedInterest / us-gaap_NatureOfExpenseAxis = us-gaap_InterestExpenseMember

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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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