Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
(Income) losses from investments under equity method of accounting	$ (58)		$ 2,378	$ (355)	$ 2,352
(Income) losses from investments in equity securities	(58)		2,478	(105)	3,707
ABI [Member]
Schedule of Equity Method Investments [Line Items]
(Income) losses from investments under equity method of accounting	(61)		2,367	(401)	2,155
Cronos [Member]
Schedule of Equity Method Investments [Line Items]
(Income) losses from investments under equity method of accounting	3		11	46	197
JUUL [Member]
Schedule of Equity Method Investments [Line Items]
Loss on disposition of JUUL equity securities	$ 0	$ 250	$ 100	$ 250	$ 1,355