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Investments in Equity Securities (Investment in JUUL Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Impairment of JUUL equity securities |  | $ 4,500 | $ 0 | $ 4,500 | $ 0
JUUL [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Payments to acquire equity securities | $ 12,800 |  |  |  |
Equity securities, ownership percentage | 35.00% | 35.00% |  | 35.00% |
Equity securities, ownership percentage upon conversion |  | 35.00% |  | 35.00% |
Equity securities, threshold for downward adjustment of board election |  | 30.00% |  | 30.00% |
Equity securities without readily determinable fair value, fair value disclosure |  | $ 8,300 |  | $ 8,300 |
Equity securities without readily determinable fair value, quantitative assessment adjustment, annual amount | $ 12,800 |  |  |  |
Equity securities without readily determinable fair value, quantitative assessment adjustment, percent |  |  |  | 35.00% |
Impairment of JUUL equity securities |  | $ 4,500 |  |  |

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- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117539-209714 + Details
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