Segment Reporting (Schedule of Pre-tax Tobacco and Health Litigation Items) (Details) - Tobacco and Health Litigation Cases [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Provision related to litigation recorded	$ 17	$ 5	$ 18	$ 43
Operating Segments [Member] | Smokeable Products [Member] | Operating Income (Loss) [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded	15	1	16	27
Segment Reconciling Items [Member] | Interest And Other Debt Expense, Net [Member]
Segment Reporting Information [Line Items]
Provision related to litigation recorded	$ 2	$ 4	$ 2	$ 16