Segment Reporting (Schedule of NPM Adjustment Items) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
NPM Adjustment Items [Line Items]
Loss (Gain) Related to Litigation Settlement	$ 0	$ 0	$ (77)	$ (68)	$ 0	$ 5	$ 0	$ (1)
Interest and other debt expense, net									$ 0	$ 9	$ 6
Non-Participating Manufacturer Arbitration Panel Decision [Member]
NPM Adjustment Items [Line Items]
Loss (Gain) Related to Litigation Settlement									(145)	4	18
Philip Morris USA [Member] | Health Care Cost Recovery Actions, 2016 NPM Adjustments [Member]
NPM Adjustment Items [Line Items]
Reduction to cost of sales					$ 39
Operating Income (Loss) [Member] | Smokeable Products [Member] | Philip Morris USA [Member] | NPM Adjustment to Cost Of Sales [Member] | Non-Participating Manufacturer Arbitration Panel Decision [Member]
NPM Adjustment Items [Line Items]
Loss (Gain) Related to Litigation Settlement									(145)	(5)	12
Interest And Other Debt Expense, Net [Member] | Philip Morris USA [Member] | Non-Participating Manufacturer Arbitration Panel Decision [Member]
NPM Adjustment Items [Line Items]
Interest and other debt expense, net									$ 0	$ 9	$ 6