Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	$ 251	$ 157
Income (Loss) from Equity Investments	51	157
ABI [Member]
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	318	134
Cronos [Member]
Schedule of Equity Method Investments [Line Items]
Income (losses) from investments under equity method of accounting	(67)	23
JUUL [Member]
Schedule of Equity Method Investments [Line Items]
JUUL	$ (200)	$ 0