Contingencies (Schedule of Pending Cases) (Details)		1 Months Ended
	Oct. 27, 2020 claim lawsuit case	Mar. 31, 2018 case	Oct. 28, 2019 claim	Oct. 22, 2018 claim
Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending			95	101
ETS Smoking and Health Case, Flight Attendants [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of claims dismissed | case		923
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending			0	1
E-vapor Litigation [Member]
Loss Contingencies [Line Items]
Number of cases pending
Other Tabacco-Related Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending			4	4
Subsequent Event [Member]
Loss Contingencies [Line Items]
Loss contingency, class action lawsuit | lawsuit	16
Subsequent Event [Member] | Individual Smoking and Health Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending	142
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | NEW MEXICO
Loss Contingencies [Line Items]
Number of cases pending	15
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Massachusetts [Member]
Loss Contingencies [Line Items]
Number of cases pending	26
Subsequent Event [Member] | Individual Smoking and Health Cases [Member] | Pending Litigation [Member] | Florida [Member]
Loss Contingencies [Line Items]
Number of cases pending	54
Subsequent Event [Member] | ETS Smoking and Health Case, Flight Attendants [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of cases | case	1,471
Subsequent Event [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of cases pending	0
Subsequent Event [Member] | Health Care Cost Recovery Actions [Member] | Canada [Member]
Loss Contingencies [Line Items]
Number of cases pending	2
Subsequent Event [Member] | E-vapor Litigation [Member]
Loss Contingencies [Line Items]
Number of cases pending	1,145
Loss contingency, class action lawsuit | lawsuit	25
Subsequent Event [Member] | E-vapor Litigation [Member] | Canada [Member]
Loss Contingencies [Line Items]
Loss contingency, class action lawsuit | lawsuit	2
Subsequent Event [Member] | E-vapor Litigation [Member] | Pending Individual Lawsuits [Member]
Loss Contingencies [Line Items]
Number of cases pending	1,064
Subsequent Event [Member] | E-vapor Litigation [Member] | Pending Lawsuits Filed By State Or Local Governments [Member]
Loss Contingencies [Line Items]
Number of cases pending	31
Subsequent Event [Member] | E-vapor Litigation [Member] | Pending Lawsuit Filed By School District [Member]
Loss Contingencies [Line Items]
Number of cases pending	25
Subsequent Event [Member] | Other Tabacco-Related Cases [Member]
Loss Contingencies [Line Items]
Number of cases pending	4
Loss contingency, number of inactive cases | case	2
Loss contingency, number of cases tried in a single proceeding | case	1
Loss contingency, number of inactive class action lawsuits | case	2