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Contingencies (Health Care Cost Recovery - 2003 and subsequent NPM Adjustment Disputes - Continuing Disputes with Non-Signatory States that Have Not Setteled) (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 USD ($) state | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Litigation settlement interest expense (income) |  | $ 9 | $ 6 | $ 13
Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member] | Philip Morris USA [Member] | Pending Litigation [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, number of disputes outstanding | state | 2 |  |  |
Loss contingency, number of states | state | 15 |  |  |
Loss contingency, number of states that did not enforce escrow statutes | state | 6 |  |  |
Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member] | Philip Morris USA [Member] | Pending Litigation [Member] | Maryland, Missouri, New Mexico and Pennsylvania [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency, number of states that did not enforce escrow statutes | state | 4 |  |  |
Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member] | Philip Morris USA [Member] | Settled Litigation [Member] | Indiana and Kentucky [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of states with settled litigation | state | 2 |  |  |
Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 388 |  |
Health Care Cost Recovery Actions, 2005 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 181 |  |
Health Care Cost Recovery Actions, 2006 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 154 |  |
Health Care Cost Recovery Actions, 2007 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 185 |  |
Health Care Cost Recovery Actions, 2008 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 250 |  |
Health Care Cost Recovery Actions, 2009 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 211 |  |
Health Care Cost Recovery Actions, 2010 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 218 |  |
Health Care Cost Recovery Actions, 2011 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 166 |  |
Health Care Cost Recovery Actions, 2012 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 214 |  |
Health Care Cost Recovery Actions, 2013 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 223 |  |
Health Care Cost Recovery Actions, 2014 NPM Adjustment [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 246 |  |
Health Care Cost Recovery Actions, 2015 NPM Adjustments [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible gain |  | 292 |  |
RJR-Lorillard-ITG Transaction Case [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Payments for legal settlements, incorrect increase |  | $ 84 |  |
Cost of Sales [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member] | Philip Morris USA [Member] | Pending Litigation [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Litigation settlement amount | $ 74 |  |  |

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