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Segment Reporting (Narrative) (Details) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2017 USD ($) case | Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($)
Aspinall [Member] | PM USA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Provision related to litigation recorded |  |  | $ 32
Operating Segments [Member] | Smokeable Products [Member] | Engle Progeny Cases [Member] | PM USA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of Engle Progeny Cases | case | 4 |  |
Operating Segments [Member] | Smokeless Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Recall impact on operating income |  | $ 60 |
Operating Segments [Member] | Selling, General and Administrative Expenses [Member] | Smokeable Products [Member] | Engle Progeny Cases [Member] | PM USA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Provision related to litigation recorded |  |  | 26
Operating Segments [Member] | Selling, General and Administrative Expenses [Member] | Smokeable Products [Member] | Aspinall [Member] | PM USA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Provision related to litigation recorded | $ 15 |  |
Operating Segments [Member] | Interest Expense [Member] | Smokeable Products [Member] | Engle Progeny Cases [Member] | PM USA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Provision related to litigation recorded | $ 2 |  |
Operating Segments [Member] | Interest Expense [Member] | Smokeable Products [Member] | Aspinall [Member] | PM USA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Provision related to litigation recorded |  |  | $ 12

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