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Investments in Equity Securities (Earnings from Equity Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments [Line Items]
Earnings from equity investment	$ 1,725	$ 890	$ 532
ABI [Member]
Investments [Line Items]
Earnings from equity investment	1,229	890	532
Cronos [Member]
Investments [Line Items]
Earnings from equity investment	$ 496	$ 0	$ 0

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

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