Segment Reporting: (Net Revenues by Product Category) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net revenues	[1],[2]	$ 40,648	$ 37,878	$ 35,174
Europe
Segment Reporting Information [Line Items]
Net revenues		17,111	15,690	14,537
SSEA, CIS & MEA
Segment Reporting Information [Line Items]
Net revenues		12,051	11,261	10,629
EA, AU & PMI GTR
Segment Reporting Information [Line Items]
Net revenues		6,632	6,393	6,201
Americas
Segment Reporting Information [Line Items]
Net revenues		4,854	4,534	3,807
Combustible Tobacco Products
Segment Reporting Information [Line Items]
Net revenues		23,794	23,218	22,334
Combustible Tobacco Products | Europe
Segment Reporting Information [Line Items]
Net revenues		8,984	8,599	8,037
Combustible Tobacco Products | SSEA, CIS & MEA
Segment Reporting Information [Line Items]
Net revenues		10,233	9,848	9,321
Combustible Tobacco Products | EA, AU & PMI GTR
Segment Reporting Information [Line Items]
Net revenues		2,415	2,516	2,676
Combustible Tobacco Products | Americas
Segment Reporting Information [Line Items]
Net revenues		2,163	2,255	2,299
Smoke-Free Products
Segment Reporting Information [Line Items]
Net revenues		16,854	14,660	12,840
Smoke-Free Products | Europe
Segment Reporting Information [Line Items]
Net revenues		8,127	7,091	6,500
Smoke-Free Products | Europe | Wellness & Healthcare
Segment Reporting Information [Line Items]
Net revenues		238	333	306
Smoke-Free Products | SSEA, CIS & MEA
Segment Reporting Information [Line Items]
Net revenues		1,818	1,413	1,308
Smoke-Free Products | EA, AU & PMI GTR
Segment Reporting Information [Line Items]
Net revenues		4,217	3,877	3,525
Smoke-Free Products | Americas
Segment Reporting Information [Line Items]
Net revenues		$ 2,691	$ 2,279	$ 1,508

[1] Includes net revenues from related parties of $4,582 million, $3,876 million and $3,553 million for the years ended December 31, 2025, 2024 and 2023, respectively

[2] Net revenues are shown net of excise tax on products. For the years ended December 31, 2025, 2024 and 2023, excise tax on products was $53,211 million, $51,563 million and $49,404 million, respectively