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Segment Reporting Schedule of Tobacco and Health Litigation Items (Details) - PM USA [Member] - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |
Provision related to litigation recorded | $ 28 | $ 1
Operating Income (Loss) [Member] | Operating Segments [Member] | Smokeable Products [Member] |  |
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |
Provision related to litigation recorded | 24 | 1
Interest And Other Debt Expense, Net [Member] | Segment Reconciling Items [Member] |  |
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items] |  |
Provision related to litigation recorded | $ 4 | $ 0

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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + 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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