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Segment Reporting (Schedule of Pre-tax Tobacco and Health Litigation Items) (Details) - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Provision related to litigation recorded | $ 17 | $ 5 | $ 18 | $ 43
Operating Segments [Member] | Smokeable Products [Member] | Operating Income (Loss) [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Provision related to litigation recorded | 15 | 1 | 16 | 27
Segment Reconciling Items [Member] | Interest And Other Debt Expense, Net [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Provision related to litigation recorded | $ 2 | $ 4 | $ 2 | $ 16

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