Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net revenues	$ 7,123	$ 6,856	$ 19,849	$ 19,103
Corporate asset impairment and exit costs		(1)		(86)
Operating income	3,160	2,944	8,292	7,899
Interest and other debt expense, net	(310)	(293)	(893)	(989)
Net periodic benefit income, excluding service cost	3	24	58	40
Earnings (losses) from equity investments	(472)	333	(306)	866
Impairment of JUUL equity securities	(2,600)	(4,500)	(2,600)	(4,500)
Loss on Cronos-related financial instruments	(105)	(636)	(202)	(1,327)
Earnings (losses) before income taxes	(324)	(2,128)	4,349	1,989
Smokeable Products Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	6,313	6,049	17,522	16,837
OCI	2,789	2,561	7,609	6,864
Oral Tobacco Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	640	620	1,901	1,762
OCI	436	417	1,297	1,195
Wine Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	157	167	434	483
OCI	19	16	(347)	50
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	13	20	(8)	21
OCI	(7)	8	(63)	(27)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Amortization of intangibles	(17)	(12)	(54)	(28)
General corporate [Member]
Segment Reporting Information [Line Items]
General corporate expenses	(60)	(46)	(150)	(154)
Corporate asset impairment and exit costs	$ 0	$ 0	$ 0	$ (1)