Goodwill and Other Intangible Assets, net (Narrative) (Details)	3 Months Ended			12 Months Ended
	Dec. 31, 2025 USD ($)	Mar. 31, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Oct. 01, 2024	Apr. 30, 2024 USD ($)	Oct. 01, 2023	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles				$ 132,000,000	$ 139,000,000	$ 128,000,000
Estimated future amortization, year 1	$ 90,000,000			90,000,000
Estimated future amortization, year 2	90,000,000			90,000,000
Estimated future amortization, year 3	90,000,000			90,000,000
Estimated future amortization, year 4	90,000,000			90,000,000
Estimated future amortization, year 5	90,000,000			90,000,000
Disposal group, gain (loss) on disposal				0	2,700,000,000	0
Goodwill impairment				1,158,000,000	0	0
Accumulated impairment losses related to goodwill	1,158,000,000			1,158,000,000	0
Goodwill	5,787,000,000			5,787,000,000	6,945,000,000	6,791,000,000
Asset impairment charges				2,128,000,000
Other intangible assets, net	$ 11,876,000,000			$ 11,876,000,000	12,973,000,000	13,686,000,000
Skoal [Member]
Finite-Lived Intangible Assets [Line Items]
Percentage exceeded over carrying value	7.00%			7.00%
Amount over carrying value	$ 300,000,000			$ 300,000,000
Impairment charge from hypothetical 1% discount rate increase				90,000,000
Asset impairment charges			$ 354,000,000		$ 354,000,000
Other intangible assets, net			$ 3,600,000,000
Skoal [Member] | Measurement Input, Long-Term Revenue Growth Rate
Finite-Lived Intangible Assets [Line Items]
Measurement input							0		0.01
Skoal [Member] | Measurement Input, Discount Rate
Finite-Lived Intangible Assets [Line Items]
Measurement input							0.115		0.110
E-Vapor [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	285,000,000	$ 873,000,000
Percentage exceeded over carrying value					28.00%
Amount over carrying value					$ 300,000,000
Impairment charge from hypothetical 1% discount rate increase				150,000,000
Definite-lived intangible assets	60,000,000			60,000,000	1,099,000,000
Goodwill	610,000,000	$ 895,000,000		610,000,000	1,768,000,000
Asset impairment charges				970,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | IQOS Tobacco Heating System [Member]
Finite-Lived Intangible Assets [Line Items]
Purchase agreement, consideration						1,800,000,000		$ 2,800,000,000		$ 1,000,000,000.0
Deferred gain on sale						$ 2,700,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | IQOS Tobacco Heating System [Member]
Finite-Lived Intangible Assets [Line Items]
Disposal group, gain (loss) on disposal					$ 2,700,000,000
UST Inc. [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived trademarks	8,500,000,000			8,500,000,000
UST Inc. [Member] | Copenhagen [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived trademarks	4,000,000,000.0			4,000,000,000.0
UST Inc. [Member] | Skoal [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived trademarks	3,600,000,000			3,600,000,000
UST Inc. [Member] | Trademarks, MST [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived trademarks	900,000,000			900,000,000
Middleton [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived trademarks	$ 2,600,000,000			$ 2,600,000,000
Weighted Average [Member] | Definite-Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Definite-lived intangible assets amortization period, weighted average, in years	19 years			19 years
Minimum [Member] | E-Vapor [Member]
Finite-Lived Intangible Assets [Line Items]
Discount rate	9.50%	12.00%		9.50%
Maximum [Member] | E-Vapor [Member]
Finite-Lived Intangible Assets [Line Items]
Discount rate	13.50%	15.00%		13.50%