Segment Reporting (Schedule of Tobacco and Health Litigation Items) (Details) - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reconciling Items [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 0	$ 0	$ 3	$ 5
PM USA [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	34	3	76	48
PM USA [Member] | Operating Segments [Member] | Smokeable Products Segment [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 34	$ 3	$ 73	$ 43