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Exit and Implementation Costs (Pre-tax Asset Impairment, Exit and Implementation Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		24 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026
Restructuring Cost and Reserve [Line Items]
Exit costs	$ 3	$ 2	$ 24	$ 3
Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs	3	2	24	3
Implementation Costs	9	11	82	40
Operating Segments [Member] \| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Restructuring Cost and Reserve [Line Items]
Implementation Costs	7		66
Operating Segments [Member] \| Location, Statement of Income, Balance [Axis]: mo:MarketingAdministrationandResearchCosts
Restructuring Cost and Reserve [Line Items]
Implementation Costs	2		16
Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Implementation Costs					$ 97
Initiative [Member] \| Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs	1	2	3	3
Implementation Costs	2	11	16	40
Initiative [Member] \| Operating Segments [Member] \| Smokeable Products Segment [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs	1	2	3	3
Implementation Costs	2	10	14	35
Initiative [Member] \| Operating Segments [Member] \| Oral Tobacco Segment [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs	0	0	0	0
Implementation Costs	0	1	2	5
USSTC Facilities Consolidation [Member] \| Operating Segments [Member] \| Oral Tobacco Segment [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs	2	0	21	0
Implementation Costs	$ 7	$ 0	$ 66	$ 0