Segment Reporting (Schedule of Pre-tax Tobacco and Health Litigation Charges) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 29	$ 3	$ 28	$ 17	$ 12	$ 21	$ 70	$ 28
Tobacco and Health Litigation Cases [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded									$ 77	$ 131	$ 80
Tobacco and Health Litigation Cases [Member] | Operating Income (Loss) [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
Tobacco and Health Litigation Cases [Member] | 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									5	18	8
PM USA [Member] | Tobacco and Health Litigation Cases [Member] | Operating Income (Loss) [Member] | Operating Segments [Member] | Smokeable Products [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded									$ 72	$ 103	$ 72