Asset Impairment, Exit and Implementation Costs (Pre-tax Asset Impairment, Exit and Implementation Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	$ 33	$ 179	$ 4
Implementation Costs	45	24
Total	78	203
Termination, settlement, and curtailment costs		27
Operating Segments [Member] | Smokeable Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	5	125
Implementation Costs	17	9
Total	22	134
Operating Segments [Member] | Smokeless Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	28	42
Implementation Costs	28	15
Total	56	57
Operating Segments [Member] | All Other [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs		7
Implementation Costs		0
Total		7
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	$ 0	5	$ 0
Implementation Costs		0
Total		$ 5