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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended | 1 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Sep. 30, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2010 | Dec. 31, 2011
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits if recognized would impact effective tax rate | $ 207 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |  | $ 207 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | $ 212 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |  |  | $ 212 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |  |  |  |
Unrecognized tax benefits if recognized would affect deferred taxes | 51 mo_UnrecognizedTaxBenefitsthatWouldImpactDeferredTaxRate |  | 51 mo_UnrecognizedTaxBenefitsthatWouldImpactDeferredTaxRate | 15 mo_UnrecognizedTaxBenefitsthatWouldImpactDeferredTaxRate |  |  | 15 mo_UnrecognizedTaxBenefitsthatWouldImpactDeferredTaxRate |  |  |  |
Liability for tax contingencies | 298 mo_LiabilityforTaxContingencies |  | 298 mo_LiabilityforTaxContingencies | 261 mo_LiabilityforTaxContingencies |  |  | 261 mo_LiabilityforTaxContingencies |  |  |  |
Accrued interest and penalties | 57 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |  | 57 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | 48 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |  |  | 48 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |  |  |  |
Interest (income) expense associated with uncertain tax position |  |  | 14 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense | 5 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense | (88)us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense |  |  |  |  |  |
Potential decrease in liability for uncertain tax positions | 139 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound |  | 139 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound |  |  |  |  |  |  |  |
Tax (benefit) provision recorded | 5 us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions | (53)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions | (14)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions | (39)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions |  |  |  |  |  |  |
Benefit for Income taxes |  |  |  |  | (75)mo_LeveragedLeasesIncomeStatementIncomeTaxExpenseBenefitonLeveragedLeases |  |  |  |  |  |
Changes to Mondelēz and PMI tax-related receivables/payables |  |  | (2)mo_OtherOperatingExpenseIncomeTaxSharingAgreement | (22)mo_OtherOperatingExpenseIncomeTaxSharingAgreement | 52 mo_OtherOperatingExpenseIncomeTaxSharingAgreement |  |  |  |  |  |
Income Tax Examination, Payment for Settlement |  |  | 0 mo_IncomeTaxExaminationPaymentforSettlement | 0 mo_IncomeTaxExaminationPaymentforSettlement | 456 mo_IncomeTaxExaminationPaymentforSettlement |  |  |  |  |  |
Valuation allowances | (211)us-gaap_DeferredTaxAssetsValuationAllowance |  | (211)us-gaap_DeferredTaxAssetsValuationAllowance | (195)us-gaap_DeferredTaxAssetsValuationAllowance |  |  | (195)us-gaap_DeferredTaxAssetsValuationAllowance |  |  |  |
Altria Group, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits if recognized would impact effective tax rate | 177 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  | 177 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 173 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  | 173 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |  |
PMI [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits if recognized would impact effective tax rate | 30 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = mo_PhilipMorrisInternationalIncMember |  | 30 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = mo_PhilipMorrisInternationalIncMember | 30 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = mo_PhilipMorrisInternationalIncMember |  |  | 30 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = mo_PhilipMorrisInternationalIncMember |  |  |  |
Mondelez [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits if recognized would impact effective tax rate |  |  |  | 9 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = mo_MondelezInternationalInc.Member |  |  | 9 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate / dei_LegalEntityAxis = mo_MondelezInternationalInc.Member |  |  |  |
State and Local Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net operating losses carry forward | 512 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  | 512 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |  |  |  |  |  |
Tax credit carryforwards | 62 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  | 62 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |  |  |  |  |  |
State and Local Jurisdiction [Member] | Earliest Tax Year [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date for carry forward losses |  |  | Dec. 31, 2015 |  |  |  |  |  |  |  |
Expiration date for tax credit carryforwards |  |  | Dec. 31, 2015 |  |  |  |  |  |  |  |
State and Local Jurisdiction [Member] | Latest Tax Year [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date for carry forward losses |  |  | Dec. 31, 2034 |  |  |  |  |  |  |  |
Expiration date for tax credit carryforwards |  |  | Dec. 31, 2017 |  |  |  |  |  |  |  |
Accruals no longer required [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax (benefit) provision recorded |  |  |  |  |  | (19)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeTaxAuthorityAxis = mo_AccrualsnolongerrequiredMember | (14)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeTaxAuthorityAxis = mo_AccrualsnolongerrequiredMember | (25)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeTaxAuthorityAxis = mo_AccrualsnolongerrequiredMember |  |  |
Previously Unrecognized Foreign Tax Credits [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax (benefit) provision recorded |  |  |  |  |  |  | (25)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeTaxAuthorityAxis = mo_PreviouslyUnrecognizedForeignTaxCreditsMember |  |  |  |
Foreign Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax credit carryforwards | 324 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  | 324 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |  |  |  |  |  |  |
Foreign Tax Authority [Member] | Earliest Tax Year [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date for tax credit carryforwards |  |  | Dec. 31, 2020 |  |  |  |  |  |  |  |
Foreign Tax Authority [Member] | Latest Tax Year [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date for tax credit carryforwards |  |  | Dec. 31, 2024 |  |  |  |  |  |  |  |
Internal Revenue Service (IRS) [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income Tax Examination, Payment for Settlement |  |  |  |  |  |  |  |  | 456 mo_IncomeTaxExaminationPaymentforSettlement / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |  |
Cash payment for federal taxes and interest on underpayment of taxes |  |  |  |  |  |  |  |  |  | 945 mo_IncomeTaxesandInterestPaid / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember | 1,100 mo_IncomeTaxesandInterestPaid / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Relinquishment of Deposits [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash payment for federal taxes and interest on underpayment of taxes |  |  | 750 mo_IncomeTaxesandInterestPaid / us-gaap_IncomeTaxAuthorityAxis = mo_RelinquishmentofDepositsMember |  | 362 mo_IncomeTaxesandInterestPaid / us-gaap_IncomeTaxAuthorityAxis = mo_RelinquishmentofDepositsMember |  |  |  |  |  |
Minimum [Member] | State and Local Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Statutes of limitations period, in years |  |  | 3 years |  |  |  |  |  |  |  |
Maximum [Member] | State and Local Jurisdiction [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Statutes of limitations period, in years |  |  | 4 years |  |  |  |  |  |  |  |
Mondelez [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability for tax contingencies | 0 mo_LiabilityforTaxContingencies / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.Member |  | 0 mo_LiabilityforTaxContingencies / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.Member |  |  |  |  |  |  |  |
Accrued interest and penalties |  |  |  | 2 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.Member |  |  | 2 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.Member |  |  |  |
Tax (benefit) provision recorded |  |  | (2)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.Member | (22)us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.Member |  |  |  |  |  |  |
PMI [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Liability for tax contingencies | 30 mo_LiabilityforTaxContingencies / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_PhilipMorrisInternationalIncMember |  | 30 mo_LiabilityforTaxContingencies / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_PhilipMorrisInternationalIncMember |  |  |  |  |  |  |  |
Accrued interest and penalties | 7 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_PhilipMorrisInternationalIncMember |  | 7 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_PhilipMorrisInternationalIncMember | 6 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_PhilipMorrisInternationalIncMember |  |  | 6 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_PhilipMorrisInternationalIncMember |  |  |  |
Mondelez and PMI [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax (benefit) provision recorded |  |  |  |  | 52 us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.andPhilipMorrisInternationalInc.Member |  |  |  |  |  |
Impact on earnings |  |  | 0 mo_ImpactonNetEarnings / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.andPhilipMorrisInternationalInc.Member | 0 mo_ImpactonNetEarnings / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.andPhilipMorrisInternationalInc.Member | 0 mo_ImpactonNetEarnings / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = mo_MondelezInternationalInc.andPhilipMorrisInternationalInc.Member |  |  |  |  |  |
Interest On Tax Underpayments [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Benefit for Income taxes |  |  |  |  | $ (73)mo_LeveragedLeasesIncomeStatementIncomeTaxExpenseBenefitonLeveragedLeases / mo_ClosingAgreementAxis = mo_InterestOnTaxUnderpaymentsMember |  |  |  |  |  |

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