v3.26.3
Background and Basis of Presentation (Background Narrative) (Details) - USD ($)
$ / shares in Units, shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Oct. 29, 2025
Jan. 31, 2025
Schedule of Equity Method Investments [Line Items]            
Treasury Stock, Value, Acquired, Cost Method $ 400,000,000 $ 112,000,000 $ 735,000,000 $ 712,000,000    
January 2025 Share Repurchase Program [Member]            
Schedule of Equity Method Investments [Line Items]            
Stock repurchase program, authorized amount         $ 2,000,000,000.0 $ 1,000,000,000.0
Repurchase of common stock (in shares) 5.9   11.2      
Treasury Stock, Value, Acquired, Cost Method $ 400,000,000 $ 112,000,000 $ 735,000,000 $ 712,000,000    
Average price per share of shares repurchased (USD per share) $ 68.52   $ 65.78      
Stock repurchase program, remaining authorized repurchase amount $ 265,000,000   $ 265,000,000      
January 2024 Share Repurchase Program [Member]            
Schedule of Equity Method Investments [Line Items]            
Repurchase of common stock (in shares)   1.9   12.3    
Average price per share of shares repurchased (USD per share)   $ 60.13   $ 58.08    
Horizon {Member] | Philip Morris USA            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage in consolidated subsidiary 75.00%   75.00%      
Horizon {Member] | JTIUH [Member]            
Schedule of Equity Method Investments [Line Items]            
Noncontrolling interest, ownership percentage by noncontrolling owners 25.00%   25.00%