Asset Impairment, Exit and Implementation Costs (Pre-tax Asset Impairment, Exit and Implementation Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs			$ 394	$ 21
Plus amounts included in net period benefit income, excluding service cost, Implementation Costs			0	0
Implementation Costs	$ 2	$ 12	394	21
Total restructuring			394	94
Plus amounts included in net periodic benefit income, excluding service cost, Total			0	12
Restructuring Charges	2	45	394	106
Total, Asset Impairment and Exit Costs	0	33	0	73
Plus amounts included in net periodic benefit income, excluding service cost, Asset Impairment and Exit Costs				12
Asset Impairment and Exit Costs		33		85
Operating Segments [Member] | Smokeable Products Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs	0	17	0	25
Total restructuring	0	31	0	75
Total, Asset Impairment and Exit Costs		14		50
Operating Segments [Member] | Oral Tobacco Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs	0	2	0	3
Total restructuring	0	2	0	11
Total, Asset Impairment and Exit Costs		0		8
Operating Segments [Member] | Wine Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs	2	0	394	0
Total restructuring	2	0	394	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)	0	(7)
Total restructuring	0	12	0	7
Total, Asset Impairment and Exit Costs		19		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		(2)		(2)
Marketing Administration And Research Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total, Implementation Costs		$ 14		$ 23