v3.26.1
Exit and Implementation Costs (Pre-tax Asset Impairment, Exit and Implementation Costs) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 21 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Restructuring Cost and Reserve [Line Items]          
Exit costs $ 21 $ 1 $ 21 $ 1  
Operating Segments [Member]          
Restructuring Cost and Reserve [Line Items]          
Exit costs 21 1 21 1  
Implementation Costs 67 14 73 29  
Operating Segments [Member] | Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold          
Restructuring Cost and Reserve [Line Items]          
Implementation Costs 59   59    
Operating Segments [Member] | Location, Statement of Income, Balance [Axis]: mo:MarketingAdministrationandResearchCosts          
Restructuring Cost and Reserve [Line Items]          
Implementation Costs 8   14    
Initiative [Member]          
Restructuring Cost and Reserve [Line Items]          
Implementation Costs         $ 95
Initiative [Member] | Operating Segments [Member]          
Restructuring Cost and Reserve [Line Items]          
Exit costs 2 1 2 1  
Implementation Costs 8 14 14 29  
Initiative [Member] | Operating Segments [Member] | Smokeable Products Segment [Member]          
Restructuring Cost and Reserve [Line Items]          
Exit costs 2 1 2 1  
Implementation Costs 7 12 12 25  
Initiative [Member] | Operating Segments [Member] | Oral Tobacco Segment [Member]          
Restructuring Cost and Reserve [Line Items]          
Exit costs 0 0 0 0  
Implementation Costs 1 2 2 4  
USSTC Facilities Consolidation [Member] | Operating Segments [Member] | Oral Tobacco Segment [Member]          
Restructuring Cost and Reserve [Line Items]          
Exit costs 19 0 19 0  
Implementation Costs $ 59 $ 0 $ 59 $ 0