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Investments in Equity Securities (Investment in JUUL Narrative) (Details) - JUUL [Member] - USD ($) $ in Billions | 1 Months Ended |
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Dec. 31, 2018 | Jun. 30, 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%

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- Details
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