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Contingencies (Health Care Cost Recovery - Federal Government's Lawsuit Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2011 | Aug. 31, 2006 | Jun. 30, 2014 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss contingency, amount of district court deposit |  |  |  | $ 21.0 | $ 190.0 | $ 57.0
Federal Governments Lawsuit [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Federal trade commission, disclosure period |  | 10 years |  |  |  |
Federal Governments Lawsuit [Member] | Philip Morris USA [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss contingency, amount of district court deposit | $ 3.1 |  |  |  |  |
Loss contingency installment period, years | 5 years |  |  |  |  |
Implementation of Corrective Communications [Member] | Federal Governments Lawsuit [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Provision related to litigation recorded |  |  | $ 31.0 |  |  |
Implementation of Corrective Communications [Member] | Federal Governments Lawsuit [Member] | Philip Morris USA [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Provision related to litigation recorded |  |  | $ 31.0 |  |  |

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- Definition Amount of cash outflow reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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