Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 6,367	$ 6,619	$ 12,726	$ 12,247
Corporate asset impairment and exit costs		(33)		(85)
Operating income	2,796	2,717	5,132	4,955
Interest and other debt expense, net	(308)	(312)	(583)	(696)
Net periodic benefit income, excluding service cost	28	15	55	16
Earnings from equity investments	9	447	166	533
Gain (loss) on Cronos-related financial instruments	40	(266)	(97)	(691)
Earnings before income taxes	2,565	2,601	4,673	4,117
Smokeable Products Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	5,603	5,853	11,209	10,788
OCI	2,450	2,371	4,820	4,303
Oral Tobacco Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	660	602	1,261	1,142
OCI	447	420	861	778
Wine Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	131	165	277	316
OCI	13	19	(366)	34
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	(27)	(1)	(21)	1
OCI	(51)	(23)	(56)	(35)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Amortization of intangibles	(18)	(8)	(37)	(16)
General corporate [Member]
Segment Reporting Information [Line Items]
General corporate expenses	(45)	(62)	(90)	(108)
Corporate asset impairment and exit costs	$ 0	$ 0	$ 0	$ (1)