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Stock Plans (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average grant date fair value $ 53mo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateWeightedAverageGrantDateFairValue $ 49mo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateWeightedAverageGrantDateFairValue $ 53mo_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodAggregateWeightedAverageGrantDateFairValue  
Weighted-average grant date fair value, per share $ 36.75us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 33.76us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 28.77us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue  
Total fair value, stock vested 86us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 89us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 81us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue  
Stock options outstanding       0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
2010 Plan [Member] | Common Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares issuable under the stock compensation plan 50,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= mo_PerformanceIncentivePlan2010Member
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Shares available to be granted 44,518,983us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mo_PerformanceIncentivePlan2010Member
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Directors Plan [Member] | Common Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares issuable under the stock compensation plan 1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= mo_StockCompensationPlanforNonEmployeesDirectorsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Shares available to be granted 477,785us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= mo_StockCompensationPlanforNonEmployeesDirectorsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Restricted And Deferred Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period, in years 3 years      
Pre-tax compensation expense 46us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
49us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
46us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
 
Deferred tax benefit 18us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
19us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
18us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
 
Unamortized compensation expense $ 58us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= mo_RestrictedAndDeferredStockMember
     
Weighted-average period of recognition, in years 2 years