Asset Impairment, Exit and Implementation Costs (Pre-tax Asset Impairment, Exit and Implementation Costs ) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	$ 40	$ 2
Plus amounts included in net periodic benefit income, excluding service cost, Asset Impairment and Exit Costs	12	0
Total, Asset Impairment and Exit Costs	52	2
Implementation Costs	9	1
Plus amounts included in net period benefit income, excluding service cost, Implementation Costs	0	0
Total, Implementation Costs	9	1
Restructuring Charges	49	3
Plus amounts included in net periodic benefit income, excluding service cost, Total	12	0
Total restructuring	61	3
Operating Segments [Member] | Smokeable Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	36	0
Implementation Costs	8	1
Restructuring Charges	44	1
Operating Segments [Member] | Smokeless Products [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	8	2
Implementation Costs	1	0
Restructuring Charges	9	2
Operating Segments [Member] | All Other [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	(5)	0
Implementation Costs	0	0
Restructuring Charges	(5)	0
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment and exit costs	1	0
Implementation Costs	0	0
Restructuring Charges	$ 1	$ 0