Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net revenues	$ 6,786		$ 7,123	$ 19,758	$ 19,849
Operating income	2,951		3,160	8,827	8,292
Interest and other debt expense, net	(266)		(310)	(869)	(893)
Loss on early extinguishment of debt	0	$ (649)	0	(649)	0
Net periodic benefit income, excluding service cost	63		3	152	58
Income (losses) from equity investments	(5,915)		(472)	(5,789)	(306)
Impairment of JUUL equity securities	0		(2,600)	0	(2,600)
Gain (loss) on Cronos-related financial instruments	(135)		(105)	(128)	(202)
Earnings (losses) before income taxes	(3,302)		(324)	1,544	4,349
Smokeable Products Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	5,975		6,313	17,275	17,522
OCI	2,753		2,789	7,901	7,609
Oral Tobacco Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	626		640	1,945	1,901
OCI	405		436	1,269	1,297
Wine Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	177		157	494	434
OCI	(24)		19	21	(347)
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	8		13	44	(8)
OCI	(30)		(7)	(56)	(63)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Amortization of intangibles	(18)		(17)	(53)	(54)
General corporate [Member]
Segment Reporting Information [Line Items]
General corporate expenses	$ (135)		$ (60)	$ (255)	$ (150)