Segment Reporting (Schedule of Tobacco and Health and Certain Other Litigation Items) (Details) - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 105	$ 34	$ 148	$ 76
Corporate, Non-Segment [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	70	0	70	0
Segment Reconciling Items [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	6	0	6	3
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	$ 29	$ 34	$ 72	$ 73