Asset Impairment, Exit and Implementation Costs (Pre-tax Asset Impairment, Exit and Implementation Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	$ 8	$ 2	$ 24	$ 123
Implementation Costs	7	4	47	7
Total	15	6	71	130
Termination and curtailment costs				20
Operating Segments [Member] | Smokeable Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	0	1	2	99
Implementation Costs	5	3	17	6
Total	5	4	19	105
Operating Segments [Member] | Smokeless Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	8	0	22	13
Implementation Costs	2	1	30	1
Total	10	1	52	14
Operating Segments [Member] | All Other [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	0	1	0	6
Implementation Costs	0	0	0	0
Total	0	1	0	6
General corporate [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment and Exit Costs	$ 0	$ 0	0	5
Implementation Costs			0	0
Total			$ 0	$ 5