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Investments in Equity Securities (Earnings in Equity Securities) (Details) - USD ($) $ in Millions | 3 Months Ended
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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

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