Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
(Income) losses from investments under equity method of accounting	$ (295)	$ (170)
(Income) losses from investments in equity securities	(295)	80
ABI [Member]
Schedule of Equity Method Investments [Line Items]
(Income) losses from investments under equity method of accounting	(313)	(205)
Cronos [Member]
Schedule of Equity Method Investments [Line Items]
(Income) losses from investments under equity method of accounting	18	35
JUUL [Member]
Schedule of Equity Method Investments [Line Items]
Loss on disposition of JUUL equity securities	$ 0	$ 250