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Contingencies (Smoking and Health Litigation - Non-Engle Progeny Litigation Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Oct. 31, 2017 | Dec. 31, 2015
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Non-Engle Progeny Smoking and Health Case, Gentile [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Compensatory damages awarded |  | $ 7,100 |
Non-Engle Progeny Smoking and Health Case, Gentile [Member] | Philip Morris USA [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Compensatory damages awarded |  | $ 5,300 |
Compensatory damages award, allocation percentage |  | 75.00% |
Non-Engle Progeny Smoking and Health Case, Bullock [Member] | Philip Morris USA [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Compensatory damages awarded |  |  | $ 900
Provision for judgment plus interest and associated costs | $ 1,000 |  |

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