Contingencies (Schedule of Pending Cases) (Details)	1 Months Ended	12 Months Ended
	Mar. 31, 2018 case	Dec. 31, 2020 claim case lawsuit	Dec. 31, 2019 claim	Dec. 31, 2018 claim
Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending		148	104	100
Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | New Mexico [Member]
Loss Contingencies [Line Items]
Number of cases pending		16
Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Massachusetts [Member]
Loss Contingencies [Line Items]
Number of cases pending | case		30
Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Florida [Member]
Loss Contingencies [Line Items]
Number of cases pending | case		60
ETS Smoking and Health Case, Flight Attendants [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of cases | case		1,471
Number of claims dismissed | case	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		1,563	101	0
Number of class action lawsuits | lawsuit		27
E-vapor Cases [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of class action lawsuits | lawsuit		3
E-vapor Cases [Member] | Pending Individual Lawsuits [Member]
Loss Contingencies [Line Items]
Number of cases pending		1,468
E-vapor Cases [Member] | Pending Lawsuits Filed By State Or Local Governments [Member]
Loss Contingencies [Line Items]
Number of cases pending		68
Other Tabacco-Related Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending		3	4	4
Number of inactive cases | case		1
Number of cases alleging unfair practices | case		2