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Benefit Plans (Postemployment) (Details) (Postemployment Benefit Plans [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Postemployment Benefit Plans [Member] |  |
Schedule of Defined Benefit Plans Including Postemployment Benefit Plan Disclosures [Line Items] |  |
Weighted-average discount rate used to determine accrued postemployment costs | 3.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember | 3.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember
Estimated net loss expected to be amortized from accumulated other comprehensive losses during 2015 | $ 19 us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember |
Weighted average turnover rate | 0.50%mo_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefiTCostWeightedAverageTurnoverRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember | 0.50%mo_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefiTCostWeightedAverageTurnoverRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember
Rate of compensation increase | 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember | 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember

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- Definition Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Turnover Rate + References No definition available. + Details
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- Details
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- Definition The interest rate used to adjust for the time value of money. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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