Goodwill and Other Intangible Assets, net (Narrative) (Details)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Apr. 30, 2024 USD ($)	Oct. 01, 2023	Jul. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Amortization of intangible assets	$ 38,000,000		$ 42,000,000	$ 102,000,000	$ 87,000,000	$ 128,000,000
Finite-lived intangible assets, amortization expense, next twelve months	150,000,000			150,000,000
Finite-lived intangible assets, amortization expense, year two	150,000,000			150,000,000
Finite-lived intangible assets, amortization expense, year three	150,000,000			150,000,000
Finite-lived intangible assets, amortization expense, year four	150,000,000			150,000,000
Finite-lived intangible assets, amortization expense, year five	150,000,000			150,000,000
Asset impairment	0		0	354,000,000	0
Carrying value	13,010,000,000			13,010,000,000		13,686,000,000				$ 12,384,000,000
Goodwill, accumulated impairment loss	$ 0			0		0
Skoal [Member]
Loss Contingencies [Line Items]
Indefinite-lived trademarks						$ 3,900,000,000
Percentage exceeded over carrying value						6.00%
Amount over carrying value						$ 200,000,000
Asset impairment		$ 354,000,000		$ 354,000,000
Carrying value		$ 3,600,000,000
Skoal [Member] | Measurement Input, Perpetual Growth Rate [Member]
Loss Contingencies [Line Items]
Measurement input	0			0				0.01
Skoal [Member] | Measurement Input, Discount Rate [Member]
Loss Contingencies [Line Items]
Measurement input	0.115			0.115				0.110
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | IQOS Tobacco Heating System [Member]
Loss Contingencies [Line Items]
Disposal group, purchase agreement, consideration, additional payment			$ 1,800,000,000		$ 1,800,000,000		$ 2,800,000,000		$ 1,800,000,000	$ 1,000,000,000.0
Disposal group, deferred gain on disposal						$ 2,700,000,000
Disposal group, gain (loss) on disposal	$ 2,700,000,000			$ 2,700,000,000
Weighted Average
Loss Contingencies [Line Items]
Finite-lived intangible asset, useful life	19 years			19 years
MST and snus [Member]
Loss Contingencies [Line Items]
Indefinite-lived trademarks	$ 8,500,000,000			$ 8,500,000,000
MST and snus [Member] | Copenhagen [Member]
Loss Contingencies [Line Items]
Indefinite-lived trademarks	4,000,000,000.0			4,000,000,000.0
MST and snus [Member] | Skoal [Member]
Loss Contingencies [Line Items]
Indefinite-lived trademarks	3,600,000,000			3,600,000,000
MST and snus [Member] | Other [Member]
Loss Contingencies [Line Items]
Indefinite-lived trademarks	900,000,000			900,000,000
Middleton [Member]
Loss Contingencies [Line Items]
Indefinite-lived trademarks	$ 2,600,000,000			$ 2,600,000,000