Contingencies (Non-Engle Progeny Litigation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Apr. 25, 2018	Dec. 31, 2017	Oct. 31, 2017	Dec. 31, 2015
Loss Contingencies [Line Items]
Payments made related to litigation	$ 23,000	$ 1,000
Non-Engle Progeny Smoking and Health Case, Gentile [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded					$ 7,100
Non-Engle Progeny Smoking and Health Case, Gentile [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded					$ 5,300
Compensatory damages award, allocation percentage					75.00%
Non-Engle Progeny Smoking and Health Case, Bullock [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded						$ 900
Provision for judgment plus interest and associated costs				$ 1,000
Payments made related to litigation	$ 900
Subsequent Event [Member] | Non-Engle Progeny Smoking and Health Case, Gentile [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Appeal bond posted			$ 8,000