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Background and Basis of Presentation (Narrative) (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2023 $ / shares | Sep. 30, 2023 USD ($) $ / shares | Jun. 30, 2023 $ / shares | Sep. 30, 2022 $ / shares | Sep. 30, 2023 USD ($) $ / shares | Sep. 30, 2022 $ / shares | Jan. 31, 2023 USD ($) | Oct. 31, 2021 USD ($) | Jan. 31, 2021 USD ($)
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Common Stock Dividend Increase Percentage | 0.043 |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared | $ / shares | $ 0.98 | $ 0.98 | $ 0.94 | $ 0.94 | $ 2.86 | $ 2.74 |  |  |
Common Stock, Dividend Rate, Annual Per Share | $ / shares |  | $ 3.92 |  |  | $ 3.92 |  |  |  |
Horizon [Member] | PM USA [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Ownership percentage in consolidated subsidiary |  | 75.00% |  |  | 75.00% |  |  |  |
Horizon [Member] | JTIUH [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage by noncontrolling owners |  | 25.00% |  |  | 25.00% |  |  |  |
January 2021 Share Repurchase Program [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Planned share repurchase program |  |  |  |  |  |  |  | $ 3,500,000,000 | $ 2,000,000,000
January 2023 Share Repurchase Program [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Planned share repurchase program |  |  |  |  |  |  | $ 1,000,000,000 |  |
Stock repurchase program, remaining authorized repurchase amount |  | $ 268,000,000 |  |  | $ 268,000,000 |  |  |  |

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