Segment Reporting (Schedule of NPM Adjustment Items) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
NPM Adjustment Items [Line Items]
Litigation settlement interest expense (income)	$ 9	$ 6	$ 13
Non-Participating Manufacturer Arbitration Panel Decision [Member]
NPM Adjustment Items [Line Items]
Loss (Gain) Related to Litigation Settlement	4	18	(84)
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	(5)	12	(97)
Interest And Other Debt Expense, Net [Member] | Philip Morris USA [Member] | Non-Participating Manufacturer Arbitration Panel Decision [Member]
NPM Adjustment Items [Line Items]
Litigation settlement interest expense (income)	$ 9	$ 6	$ 13