Financial Instruments (Narrative) (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2025 USD ($) contract	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) contract	Sep. 30, 2024 USD ($)	Dec. 31, 2024 contract	Jun. 01, 2023 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Number of foreign currency derivatives held | contract	0			0		0
NJOY Holdings, Inc. [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Contingent consideration arrangements							$ 500
NJOY Holdings, Inc. [Member] | Menthol Pod [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Contingent consideration arrangements							250
NJOY Holdings, Inc. [Member] | Blueberry Pod [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Contingent consideration arrangements							125
NJOY Holdings, Inc. [Member] | Watermelon Pod [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Contingent consideration arrangements							$ 125
ABI [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains from net investment hedges			$ 42		$ 42
Foreign currency denominated debt [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax (gains) losses of net investment hedges	$ (12)	$ 127		$ 391	$ 29