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Benefit Plans (Net Postemployment Costs) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract] |  |  |
Service cost | $ 1 | $ 1 | $ 1
Interest cost | 1 | 1 | 2
Amortization of net loss | 18 | 17 | 16
Other | (17) | (7) | 121
Net postemployment costs | $ 3 | $ 12 | $ 140

X
- Definition Postemployment Benefits, Amortization of Gains (Losses) + References No definition available. + Details
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- Definition Postemployment Benefits, Interest Cost + References No definition available. + Details
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Namespace Prefix: | mo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Postemployment Benefits, Other Cost + References No definition available. + Details
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Namespace Prefix: | mo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Postemployment Benefits, Service Cost + References No definition available. + Details
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Namespace Prefix: | mo_
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Period Type: | duration

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- Details
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- Definition Period expense related to postemployment benefits. + References No definition available. + Details
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Balance Type: | debit
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