Contingencies (Tobacco-Related Litigation) (Details)	Dec. 31, 2019 litigation_case
Loss Contingencies [Line Items]
Number of cases decided in favor of PM	501
Number of cases decided in favor of plaintiff	13
Cases Remaining On Appeal [Member]
Loss Contingencies [Line Items]
Number of cases on appeal	4
Case Decided In Favor Of Plaintiff [Member]
Loss Contingencies [Line Items]
Number of cases that reached final resolution in favor of PM	9