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Contingencies Contingencies (Judgments Recorded and Paid) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Loss Contingencies Judgments Recorded and Paid [Line Items]      
Accrued liability for tobacco and health litigation items at beginning of period $ 39us-gaap_LossContingencyAccrualAtCarryingValue $ 3us-gaap_LossContingencyAccrualAtCarryingValue  
Loss Contingency Accrual, Provision 43us-gaap_LossContingencyAccrualProvision 4us-gaap_LossContingencyAccrualProvision  
Payments for Legal Settlements (5)us-gaap_PaymentsForLegalSettlements 0us-gaap_PaymentsForLegalSettlements  
Accrued liability for tobacco and health litigation items at end of period 77us-gaap_LossContingencyAccrualAtCarryingValue 7us-gaap_LossContingencyAccrualAtCarryingValue  
Tobacco and Health Judgment [Member]      
Loss Contingencies Judgments Recorded and Paid [Line Items]      
Pretax Tobacco and Health charges 0mo_PretaxTobaccoAndHealthCharges
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= mo_TobaccoandHealthJudgmentMember
3mo_PretaxTobaccoAndHealthCharges
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= mo_TobaccoandHealthJudgmentMember
 
Engle Progeny Cases, Federal [Member]      
Loss Contingencies Judgments Recorded and Paid [Line Items]      
Loss Contingency Accrual, Provision 43us-gaap_LossContingencyAccrualProvision
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= mo_EngleProgenyCasesFederalMember
0us-gaap_LossContingencyAccrualProvision
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= mo_EngleProgenyCasesFederalMember
 
Interest Expense [Member]      
Loss Contingencies Judgments Recorded and Paid [Line Items]      
Commitments and Contingencies Accrued Interest 0mo_CommitmentsandContingenciesAccruedInterest
/ us-gaap_NatureOfExpenseAxis
= us-gaap_InterestExpenseMember
1mo_CommitmentsandContingenciesAccruedInterest
/ us-gaap_NatureOfExpenseAxis
= us-gaap_InterestExpenseMember
 
Federal Governments Lawsuit [Member] | Health Care Cost Recovery Litigation [Member]      
Loss Contingencies Judgments Recorded and Paid [Line Items]      
Loss Contingency Accrual, Provision     $ 31us-gaap_LossContingencyAccrualProvision
/ dei_LegalEntityAxis
= mo_FederalGovernmentsLawsuitMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= mo_HealthCareCostRecoveryLitigationMember