Segment Reporting Schedule of Tobacco and Health Litigation Items (Details) - PM USA [Member] - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 28	$ 1
Operating Income (Loss) [Member] | Operating Segments [Member] | Smokeable Products [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	24	1
Interest And Other Debt Expense, Net [Member] | Segment Reconciling Items [Member]
Schedule of Pre-tax Tobacco and Health Litigation Charges [Line Items]
Provision related to litigation recorded	$ 4	$ 0