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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs			$ 395	$ 25
Plus amounts included in net period benefit income, excluding service cost, Implementation Costs			0	0
Implementation Costs	$ 1	$ 4	395	25
Total restructuring			395	99
Plus amounts included in net periodic benefit income, excluding service cost, Total			0	12
Restructuring Charges	1	5	395	111
Total, Asset Impairment and Exit Costs	0	1	0	74
Plus amounts included in net periodic benefit income, excluding service cost, Asset Impairment and Exit Costs				12
Asset Impairment and Exit Costs		1		86
Operating Segments [Member] | Smokeable Products Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs	0	4	0	29
Total restructuring	0	4	0	79
Total, Asset Impairment and Exit Costs		0		50
Operating Segments [Member] | Oral Tobacco Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs	0	0	0	3
Total restructuring	0	1	0	12
Total, Asset Impairment and Exit Costs		1		9
Operating Segments [Member] | Wine Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs	1	0	395	0
Total restructuring	1	0	395	0
Total, Asset Impairment and Exit Costs		0		0
Operating Segments [Member] | All Other [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs			0	(7)
Total restructuring			0	7
Total, Asset Impairment and Exit Costs				14
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs			0	0
Total restructuring			0	1
Total, Asset Impairment and Exit Costs				1
Asset Impairment and Exit Costs	$ 0	0	$ 0	1
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs		1		(1)
Marketing Administration And Research Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs		$ 3		$ 26