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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 |  |  |  |

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