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Financial Instruments (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
Financial Instruments (Narrative) (Details) $ in Millions	Jun. 30, 2026 USD ($) contract	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) contract	Jun. 30, 2025 USD ($)	Dec. 31, 2025 contract	Jun. 01, 2023 USD ($)
Derivative [Line Items]
Number of foreign currency derivatives held \| contract	0		0		0
NJOY Holdings, Inc. [Member]
Derivative [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, high						$ 500
NJOY Holdings, Inc. [Member] \| Menthol Pod [Member]
Derivative [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, high						250
NJOY Holdings, Inc. [Member] \| Blueberry Pod [Member]
Derivative [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, high						125
NJOY Holdings, Inc. [Member] \| Watermelon Pod [Member]
Derivative [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, high						$ 125
Foreign Currency Denominated Debt [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
(Gains) losses of our net investment hedges	$ (30)	$ 264	$ (73)	$ 403