Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Schedule of Equity Method Investments [Line Items]
Earnings from equity investments	$ 157	$ 86
ABI [Member]
Schedule of Equity Method Investments [Line Items]
Earnings from equity investments	134	86
Cronos Group Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Earnings from equity investments	$ 23	$ 0

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

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