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Investments in Equity Securities (Investment in JUUL Narrative) (Details) - USD ($) shares in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2021 | Apr. 30, 2020 | Dec. 31, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity securities without readily determinable fair value, downward price adjustment, cumulative amount |  | $ 0 |  |
JUUL [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity securities, ownership percentage |  | 35.00% | 35.00% | 35.00%
Equity investments, fair value option, voting shares (in shares) |  | 42 |  |
Equity securities without readily determinable fair value, upward price adjustment, cumulative amount |  | $ 0 |  |
Impairment of JUUL equity securities | $ 0 |  |  |

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- Definition Amount of cumulative loss from downward price adjustment 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=120269885&loc=SL75117539-209714 + Details
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- Definition Amount of cumulative gain from upward price adjustment 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 (c) -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117539-209714 + Details
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