Investments in Equity Securities (Earnings from Equity Investments) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments [Line Items]
(Income) losses from equity investments		$ 5,979	$ 211	$ (1,725)
(Income) losses from equity investments		5,979	111	(1,725)
ABI [Member]
Investments [Line Items]
(Income) losses from equity investments		5,564	223	(1,229)
Cronos [Member]
Investments [Line Items]
(Income) losses from equity investments		415	(12)	(496)
JUUL [Member]
Investments [Line Items]
Income (losses) from investments under fair value option	$ (100)	$ 0	$ (100)	$ 0

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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