Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	$ (6,015,000,000)	$ (472,000,000)	$ (5,789,000,000)	$ (306,000,000)
Income (losses) from equity investments	(5,915,000,000)	(472,000,000)	(5,789,000,000)	(306,000,000)
ABI [Member]
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	(6,036,000,000)	(418,000,000)	(5,644,000,000)	(306,000,000)
Equity method investment, impairment	6,157,000,000		6,157,000,000		$ 0
Cronos [Member]
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	21,000,000	(54,000,000)	(145,000,000)	0
JUUL [Member]
Schedule of Equity Method Investments [Line Items]
JUUL	$ 100,000,000	$ 0	$ 0	$ 0