Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net revenues	$ 6,936		$ 6,367	$ 12,972	$ 12,726
Operating income	3,186		2,796	5,876	5,132
Interest and other debt expense, net	(295)		(308)	(603)	(583)
Loss on early extinguishment of debt	0	$ (649)	0	(649)	0
Net periodic benefit income, excluding service cost	46		28	89	55
Income (losses) from equity investments	75		9	126	166
Gain (loss) on Cronos-related financial instruments	(103)		40	7	(97)
Earnings before income taxes	2,909		2,565	4,846	4,673
Smokeable Products Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	6,050		5,603	11,300	11,209
OCI	2,776		2,450	5,148	4,820
Oral Tobacco Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	693		660	1,319	1,261
OCI	472		447	864	861
Wine Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	167		131	317	277
OCI	27		13	45	(366)
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	26		(27)	36	(21)
OCI	(12)		(51)	(26)	(56)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Amortization of intangibles	(18)		(18)	(35)	(37)
General corporate [Member]
Segment Reporting Information [Line Items]
General corporate expenses	$ (59)		$ (45)	$ (120)	$ (90)