Contingencies (E-vapor Litigation) (Details) - E-vapor Litigation [Member] - claim	Jan. 25, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Number of cases pending		1,563	101	0
Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of cases set for trial	0
Pending Class Action Lawsuits [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of cases pending	27
Pending Individual Lawsuits [Member]
Loss Contingencies [Line Items]
Number of cases pending		1,468
Pending Individual Lawsuits [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of cases pending	1,631
Pending Lawsuit Filed By School District [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of cases pending	81
Pending Lawsuits Filed By State Or Local Governments [Member]
Loss Contingencies [Line Items]
Number of cases pending		68