v3.25.1
Exit and Implementation Costs (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]        
Implementation costs $ 15,000,000      
Exit costs 0      
Exit or implementation costs   $ 0    
Operating Segments [Member] | Smokeable Products Segment [Member]        
Restructuring Cost and Reserve [Line Items]        
Implementation costs 13,000,000      
Operating Segments [Member] | Oral Tobacco Products [Member]        
Restructuring Cost and Reserve [Line Items]        
Implementation costs 2,000,000      
Initiative [Member]        
Restructuring Cost and Reserve [Line Items]        
Implementation costs 48,000,000      
Restructuring charges 83,000,000      
Severance costs 35,000,000      
Payments for restructuring 18,000,000   $ 29,000,000 $ 11,000,000
Initiative [Member] | Exit Costs [Member]        
Restructuring Cost and Reserve [Line Items]        
Payments for restructuring 1,000,000   1,000,000 0
Initiative [Member] | Implementation Costs [Member]        
Restructuring Cost and Reserve [Line Items]        
Payments for restructuring 17,000,000   28,000,000 $ 11,000,000
Initiative [Member] | Minimum [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, expected cost 100,000,000   100,000,000  
Initiative [Member] | Maximum [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related cost, expected cost $ 125,000,000   $ 125,000,000