Segment Reporting (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($)	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment		3
Net revenues		$ 23,279	$ 24,018	$ 24,483
Asset impairment charges		2,128
Exit costs		8	35
Research and development expense		195	208	$ 220
NJOY Holdings, Inc. [Member]
Segment Reporting Information [Line Items]
Net revenue		23
Cost of sales		44
Skoal [Member]
Segment Reporting Information [Line Items]
Asset impairment charges	$ 354		354
Initiative [Member]
Segment Reporting Information [Line Items]
Restructuring charges		124
Exit costs		$ 56	$ 68
Revenue Benchmark [Member] | Credit Concentration Risk [Member] | Customer One [Member]
Segment Reporting Information [Line Items]
Contribution of net revenues by major customer percentage		23.00%	22.00%	25.00%
Revenue Benchmark [Member] | Credit Concentration Risk [Member] | Customer Two [Member]
Segment Reporting Information [Line Items]
Contribution of net revenues by major customer percentage		19.00%	20.00%	23.00%
Oral Tobacco Products [Member]
Segment Reporting Information [Line Items]
Other segment item		$ 974	$ 1,327	$ 945
Net revenues		2,802	2,776	2,667
E-Vapor [Member]
Segment Reporting Information [Line Items]
Other segment item		2,284	211	78
Net revenues		(13)	40	62
Smokeable Products [Member]
Segment Reporting Information [Line Items]
Other segment item		3,431	3,454	3,506
Net revenues		20,485	21,204	21,756
Research and development expense				220
Smokeable Products [Member] | Cigarettes [Member]
Segment Reporting Information [Line Items]
Net revenues		19,248	20,066	20,665
Smokeable Products [Member] | Cigars [Member]
Segment Reporting Information [Line Items]
Net revenues		1,237	1,138	1,091
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues		5	(2)	$ (2)
Research and development expense		$ 195	$ 208