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Contingencies (Lights/Ultra Lights Cases) (Details) - Subsequent Event [Member]	Jan. 24, 2022 claim court case
Lights [Member]
Loss Contingencies [Line Items]
Claims not certified, number | case	23
Number of cases pending	2
Lights [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of state courts	21
Smoking And Health Class Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending | claim	1

X

- Definition

Loss Contingency, Claims Not Certified, Number

+ References

No definition available.

+ Details

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Namespace Prefix:	mo_
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Balance Type:	na
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X

- Definition

Loss Contingency, State Courts, Number

+ References

No definition available.

+ Details

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Namespace Prefix:	mo_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

+ Details

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Period Type:	instant

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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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- Details

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