Segment Reporting (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2015 case	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($) case
Tobacco and Health Litigation Cases [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded		$ 38	$ 43
Engle Progeny Cases, Federal [Member] | PM USA [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded			$ 43
Number of claims resolved | case	415		415
Operating Segments [Member] | Operating Income (Loss) [Member] | Smokeable Products [Member] | Tobacco and Health Litigation Cases [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded		26	$ 43
Segment Reconciling Items [Member] | Interest And Other Debt Expense, Net [Member] | Tobacco and Health Litigation Cases [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded		$ 12	$ 0