Contingencies (Schedule Of Pending Cases) (Details)			1 Months Ended	263 Months Ended
	Apr. 27, 2018 case	Apr. 23, 2018 case trial plantiff	Mar. 31, 2018 case	Mar. 31, 2018 case	Apr. 27, 2017 case	Apr. 25, 2016 case
Individual Smoking And Health Cases [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal					80	62
Individual Smoking And Health Cases [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal		102
ETS Smoking and Health Case, Flight Attendants [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of claims dismissed			923
ETS Smoking and Health Case, Flight Attendants [Member] | Subsequent Event [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of cases		1,491
Smoking And Health Class Actions And Aggregated Claims Litigation [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal					5	5
Smoking And Health Class Actions And Aggregated Claims Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of claims dismissed				61
Smoking And Health Class Actions And Aggregated Claims Litigation [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal		4
Smoking And Health Class Actions And Aggregated Claims Litigation [Member] | Subsequent Event [Member] | Pending Litigation [Member] | WEST VIRGINIA [Member]
Loss Contingencies [Line Items]
Number of cases	5	30
Number of plaintiffs | plantiff		30
Number of consolidated trials | trial		6
Smoking And Health Class Actions And Aggregated Claims Litigation [Member] | Subsequent Event [Member] | Pending Litigation [Member] | WEST VIRGINIA [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of cases	2	9
Number of claims dismissed		25
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal					1	1
Health Care Cost Recovery Actions [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal		1
Lights Ultra Lights Class Actions [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal					5	11
Lights Ultra Lights Class Actions [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of unfavorable verdicts partially or entirely reversed on appeal		3