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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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Equity Investments, Fair Value Option, Voting Shares

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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

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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=120269885&loc=SL75117539-209714

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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

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