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Investments in Equity Securities (Investment in JUUL Narrative) (Details) - JUUL [Member] - USD ($) $ in Billions |  | 1 Months Ended |
--- | --- | --- | ---
Dec. 20, 2018 | Dec. 31, 2018 | Mar. 31, 2019
Schedule of Equity Method Investments [Line Items] |  |  |
Payments to acquire equity securities Fv-Ni |  | $ 12.8 |
Equity securities Fv Ni, ownership percentage |  | 35.00% | 35.00%
Equity securities, Fv-Ni, ownership percentage upon conversion |  |  | 35.00%
Equity securities Fv-Ni, threshold For downward adjustment of board election |  |  | 30.00%
Equity securities Fv-Ni, ineligible for sale or transfer, period | 6 years |  |

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- Details
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