Contingencies (Tobacco-Related Litigation) (Narrative) (Details)	Dec. 31, 2016 litigation_case
Loss Contingencies [Line Items]
Loss Contingency Claims Resolved in Favor of the Company	454
Number of cases decided	13
Cases Remaining On Appeal [Member]
Loss Contingencies [Line Items]
Number of cases decided	4
Case Decided In Favor Of Plaintiff [Member]
Loss Contingencies [Line Items]
Number of cases decided	9