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Financial Instruments (Narrative) (Details) $ in Millions	3 Months Ended
Financial Instruments (Narrative) (Details) $ in Millions	Mar. 31, 2026 USD ($) contract	Mar. 31, 2025 USD ($)	Dec. 31, 2025 contract	Jun. 01, 2023 USD ($)
Derivative [Line Items]
Number of foreign currency derivatives held \| contract	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	$ (43)	$ 139