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Long-Term Debt (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Feb. 28, 2024
Jan. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Debt Instrument [Line Items]          
Interest payable     $ 389 $ 410  
Repayments of long-term debt     $ 1,121 $ 1,566 $ 1,105
PM USA [Member]          
Debt Instrument [Line Items]          
Ownership percentage in consolidated subsidiary     100.00%    
Senior Notes [Member] | Debt Instrument, Redemption, Period One [Member]          
Debt Instrument [Line Items]          
Required purchase price as percentage of aggregate principal amount     101.00%    
USD Notes, 4.000% [Member] | Senior Notes [Member]          
Debt Instrument [Line Items]          
Interest rate   4.00%      
Repayments of long-term debt   $ 776      
USD Notes, 3.800% [Member] | Senior Notes [Member]          
Debt Instrument [Line Items]          
Interest rate 3.80%        
Repayments of long-term debt $ 345