Segment Reporting (Schedule of Pre-tax Tobacco and Health Litigation Items) (Details) - PM USA [Member] - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Provision related to litigation recorded	$ 0	$ 45	$ 18	$ 88
Operating Segments [Member] | Smokeable Products [Member] | Operating Income (Loss) [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded	0	45	16	72
Segment Reconciling Items [Member] | Interest And Other Debt Expense, Net [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded	$ 0	$ 0	$ 2	$ 16