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Segment Reporting (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Asset impairment | $ 354 | $ 0 | $ 354 | $ 0
All Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Research and development expense | $ 53 |  | $ 104 |
Smokeable Products Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Research and development expense |  | $ 55 |  | $ 98

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