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Investments in Equity Securities (Investment in JUUL Narrative) (Details) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jan. 28, 2020 USD ($) director | Dec. 31, 2018 USD ($) | Sep. 30, 2020 USD ($) director | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) director | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Apr. 30, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Impairment of JUUL equity securities | $ |  |  | $ 2,600,000,000 |  | $ 4,500,000,000 | $ 2,600,000,000 | $ 4,500,000,000 |  |
JUUL [Member] |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Payments to acquire equity securities | $ |  | $ 12,800,000,000 |  |  |  |  |  |  |
Equity securities, ownership percentage |  | 35.00% | 35.00% | 35.00% |  | 35.00% |  | 35.00% | 35.00%
Equity securities without readily determinable fair value, amount | $ |  |  | $ 1,605,000,000 | $ 4,205,000,000 |  | $ 1,605,000,000 |  | $ 4,205,000,000 |
Equity securities without readily determinable fair value, non-compete release trigger period | 12 months |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, non-compete release trigger percentage of investment carrying value | 10.00% |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, quantitative assessment adjustment, annual amount | $ | $ 12,800,000,000 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, no litigation period | 1 year |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of board members |  |  | 7 |  |  | 7 |  |  |
Equity securities without readily determinable fair value, number of board members upon share conversion | 9 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of independent board members upon share conversion | 3 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of board members appointed by investor upon share conversion | 1 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of board members appointed by investee stockholders upon share conversion | 2 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of investor nominating committee designees upon share conversion | 1 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of directors designated by investor upon share conversion | 2 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of nominating committee directors designated by investee upon share conversion | 3 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of oversight committee directors designated by investor upon share conversion | 2 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, number of oversight committee chair directors designated by investor upon share conversion | 1 |  |  |  |  |  |  |  |
Equity securities without readily determinable fair value, upward price adjustment, cumulative amount | $ |  |  | $ 0 |  |  | $ 0 |  |  |
Impairment of JUUL equity securities | $ |  |  |  | $ 4,100,000,000 | $ 4,500,000,000 | $ 2,600,000,000 |  | $ 8,600,000,000 |

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