Contingencies (Schedule of Pending Cases) (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2018 case	Dec. 31, 2019 case claim lawsuit	Dec. 31, 2018 case	Dec. 31, 2017 case
Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending		104	100	92
Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Massachusetts [Member]
Loss Contingencies [Line Items]
Number of cases pending		21
Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Florida [Member]
Loss Contingencies [Line Items]
Number of cases pending		43
ETS Smoking and Health Case, Flight Attendants [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of cases		1,472
Number of claims dismissed	923
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending		1	1	1
E-vapor Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending		101	0	0
Number of class action lawsuits | lawsuit		22
E-vapor Cases [Member] | Pending Individual Lawsuits [Member]
Loss Contingencies [Line Items]
Number of cases pending | claim		76
E-vapor Cases [Member] | Pending Lawsuits Filed By State Or Local Governments [Member]
Loss Contingencies [Line Items]
Number of cases pending | claim		2
E-vapor Cases [Member] | Pending Lawsuit Filed By School District [Member]
Loss Contingencies [Line Items]
Number of cases pending | claim		1
Other Tabacco-Related Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending		4	4	7
Number of inactive cases		2
Number of cases tried in a single proceeding		1
Number of cases alleging unfair practices		2