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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 3	$ 21	$ 48	$ 119
Marketing Administration And Research Costs [Member] | Operating Segments [Member] | Smokeable Products [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	3	10	43	94
Marketing Administration And Research Costs [Member] | Operating Segments [Member] | Smokeless Products [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	0	10	0	10
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	$ 0	$ 1	$ 5	$ 15