Investments in Equity Securities (Investment in ABI Narrative) (Details) - ABI [Member] - USD ($) shares in Millions, $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	10.00%
Number of restricted shares owned (in shares)	185
Number of ordinary shares owned (in shares)	12
Fair Value, Inputs, Level 1 [Member]
Schedule of Equity Method Investments [Line Items]
Fair value of equity investment	$ 13,100	$ 11,900
Equity method investment, difference between carrying amount and fair value	$ 9,200	$ 9,000
Equity method investment, difference between carrying amount and fair value, percentage (approximately)	42.00%	33.00%

Equity Method Investment, Difference Between Carrying Amount and Fair Value

No definition available.

Name:	mo_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndFairValue
Namespace Prefix:	mo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Equity Method Investment, Difference Between Carrying Amount and Fair Value, Percentage

+ References

No definition available.

+ Details

Name:	mo_EquityMethodInvestmentDifferenceBetweenCarryingAmountandFairValuePercentage
Namespace Prefix:	mo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Equity Method Investment, Number of Shares Owned, Common

+ References

No definition available.

+ Details

Name:	mo_EquityMethodInvestmentNumberofSharesOwnedCommon
Namespace Prefix:	mo_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Equity Method Investment, Number of Shares Owned, Restricted

+ References

No definition available.

+ Details

Name:	mo_EquityMethodInvestmentNumberofSharesOwnedRestricted
Namespace Prefix:	mo_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126960272&loc=d3e32014-111567

+ Details

Name:	us-gaap_EquityMethodInvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

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

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mo_ABInBevMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: