Contingencies (Engle Class Action And Engle Progeny Trial Results) (Details)		1 Months Ended	12 Months Ended
	Jan. 27, 2020 USD ($) case plantiff	Jul. 31, 2006	Dec. 31, 2015 case	Jan. 31, 2008 case	Jul. 31, 2000 USD ($)
Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Punitive damages awarded | $					$ 145,000,000,000
Engle Progeny Cases [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded | $					$ 74,000,000,000
Period for decertified class members could file individual actions		1 year
Engle Progeny Cases, State [Member]
Loss Contingencies [Line Items]
Number of cases pending				9,300
Engle Progeny Cases, Federal [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of claims resolved			415
Subsequent Event [Member] | Engle Progeny Cases [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of verdicts returned	134
Number of unfavorable verdicts	77
Number of claims with unfavorable verdicts pending/reversed	6
Number of favorable verdicts	47
Subsequent Event [Member] | Engle Progeny Cases, State [Member]
Loss Contingencies [Line Items]
Number of cases pending	1,700
Number of plaintiffs | plantiff	2,100
Subsequent Event [Member] | Engle Progeny Cases, State [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts	42
Subsequent Event [Member] | Engle Progeny Cases, Federal [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of cases pending	4
Subsequent Event [Member] | Engle Progeny Cases, D Cohen, Collar, Chacon [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Verdicts reversed, number	4
Subsequent Event [Member] | Engle Progeny Cases, Reider and Banks [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Zero damages verdicts	2
Damages awarded, value | $	$ 0
Subsequent Event [Member] | Engle Progeny Cases, Weingart and Hancock [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Zero damages verdict modified	2
Damages awarded, value | $	$ 0
Subsequent Event [Member] | Engle Progeny Cases, Pollari [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts	1
Subsequent Event [Member] | Engle Progeny Cases, Gloger And Rintoul [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts	2