Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net revenues		$ 24,483	$ 25,096	$ 26,013
Operating income		11,547	11,919	11,560
Amortization of intangibles		(128)	(73)	(72)
Interest and other debt expense, net		989	1,058	1,162
Loss on early extinguishment of debt	$ 649	0	0	649
Net periodic benefit income, excluding service cost		(127)	(184)	(202)
(Income) losses from investments in equity securities		(243)	3,641	5,979
Loss on Cronos-related financial instruments		0	15	148
Earnings before income taxes		10,928	7,389	3,824
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
General corporate expenses		(643)	(292)	(345)
Smokeable Products [Member]
Segment Reporting Information [Line Items]
Net revenues		21,756	22,476	22,866
Smokeable Products [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income		10,670	10,688	10,394
Oral Tobacco Products [Member]
Segment Reporting Information [Line Items]
Net revenues		2,667	2,580	2,608
Oral Tobacco Products [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income		1,722	1,632	1,659
Wine [Member]
Segment Reporting Information [Line Items]
Net revenues		0	0	494
Wine [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income		0	0	21
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues		60	40	45
All Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating income		$ (74)	$ (36)	$ (97)