Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	$ (25)	$ 9	$ 226	$ 166
Income (losses) from equity investments	75	9	126	166
ABI [Member]
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	74	(22)	392	112
Cronos [Member]
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	(99)	31	(166)	54
JUUL [Member]
Schedule of Equity Method Investments [Line Items]
JUUL	$ 100	$ 0	$ (100)	$ 0