Contingencies (Non-Engle Progeny Litigation) (Details) - USD ($)	1 Months Ended	3 Months Ended
	Apr. 30, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Aug. 31, 2019	Oct. 31, 2017
Loss Contingencies [Line Items]
Provision related to litigation recorded		$ 29,000,000	$ 3,000,000	$ 28,000,000	$ 17,000,000	$ 12,000,000	$ 21,000,000	$ 70,000,000	$ 28,000,000
Non-Engle Progeny Smoking and Health Case, Greene [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded			$ 10,000,000
Non-Engle Progeny Smoking and Health Case, Laramie [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded										$ 11,000,000
Punitive damages awarded										$ 10,000,000
Non-Engle Progeny Smoking and Health Case, Capone [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded						$ 225,000
Provision related to litigation recorded	$ 325,000
Non-Engle Progeny Smoking and Health Case, Gentile [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded											$ 7,100,000
Non-Engle Progeny Smoking and Health Case, Gentile [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded											$ 5,300,000
Compensatory damages award, allocation percentage											75.00%