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Segment Reporting (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Mar. 31, 2017 | Jun. 30, 2018
Marketing, Administration and Research Costs Expenses [Member] | Smokeable Products [Member] | Engle Progeny Cases [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Provision related to litigation recorded | $ 60 | $ 15 |  | $ 84
Interest And Other Debt Expense, Net [Member] | Smokeable Products [Member] | Engle Progeny Cases [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Provision related to litigation recorded | $ 10 | $ 2 |  | $ 14
Operating Segments [Member] | Smokeless Products [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Recall impact on operating income |  |  | $ 60 |

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