v3.25.1
Background and Basis of Presentation (Narrative) (Details) - USD ($)
shares in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Jan. 31, 2025
Jan. 31, 2024
Horizon [Member] | PM USA [Member]        
Equity, Class of Treasury Stock [Line Items]        
Ownership percentage in consolidated subsidiary 75.00%      
Horizon [Member] | JTIUH [Member]        
Equity, Class of Treasury Stock [Line Items]        
Noncontrolling interest, ownership percentage by noncontrolling owners 25.00%      
January 2023 Share Repurchase Program [Member]        
Equity, Class of Treasury Stock [Line Items]        
Repurchase of common stock (shares)   46.5    
January 2024 Share Repurchase Program [Member]        
Equity, Class of Treasury Stock [Line Items]        
Planned share repurchase program   $ 3,400,000,000 $ 1,000,000,000.0 $ 1,000,000,000
Stock repurchase program, remaining authorized repurchase amount $ 674,000,000      
Repurchase of common stock (shares) 5.7      
ASR Agreements [Member]        
Equity, Class of Treasury Stock [Line Items]        
Planned share repurchase program   2,400,000,000    
Stock repurchase program, remaining authorized repurchase amount   $ 360,000,000    
Repurchase of common stock (shares)   46.5    
Accelerated share repurchases, percentage of aggregate value   85.00%