Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net revenues	$ 6,072	$ 6,259	$ 17,433	$ 18,044
Amortization of intangibles	(38)	(38)	(112)	(102)	$ (139)
Operating income	3,230	3,152	8,248	8,359
Interest and other debt expense, net	278	267	815	782
Net periodic benefit income, excluding service cost	(16)	(25)	(45)	(74)
(Income) losses from investments in equity securities	(107)	(116)	(398)	(530)
Gain on the sale of IQOS System commercialization rights	0	0	0	(2,700)
Earnings before income taxes	3,075	3,026	7,876	10,881
Smokeable Products Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	5,387	5,540	15,366	15,941
Operating income	2,942	2,937	8,341	8,183
Oral Tobacco Segment [Member]
Segment Reporting Information [Line Items]
Net revenues	689	722	2,096	2,084
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	(4)	(3)	(29)	19
Operating Segments [Member] | Smokeable Products Segment [Member]
Segment Reporting Information [Line Items]
Operating income	2,942	2,937	8,341	8,183
Operating Segments [Member] | Oral Tobacco Segment [Member]
Segment Reporting Information [Line Items]
Operating income	459	464	1,390	996
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	(76)	(119)	(1,198)	(291)
General corporate [Member]
Segment Reporting Information [Line Items]
General corporate expenses	$ (57)	$ (92)	$ (173)	$ (427)