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Segment Reporting (Narrative) (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Feb. 28, 2015 case | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) case | Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($)
Tobacco and Health Litigation Cases [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Provision related to litigation recorded |  | $ 5 |  | $ 5 |  | $ 43 | $ 48
Engle Progeny Cases, Federal [Member] | PM USA [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Provision related to litigation recorded |  |  |  |  | $ 43 |  |
Number of claims resolved | case | 415 |  |  |  | 415 |  |
Operating Segments [Member] | Operating Income (Loss) [Member] | Smokeable Products [Member] | Tobacco and Health Litigation Cases [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Provision related to litigation recorded |  | 1 | $ 26 | 5 | $ 43 | 27 | 48
Segment Reconciling Items [Member] | Interest And Other Debt Expense, Net [Member] | Tobacco and Health Litigation Cases [Member] |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Provision related to litigation recorded |  | $ 4 | $ 12 | $ 0 |  | $ 16 | $ 0

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