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Related Party Transactions - Agency Arrangement With IEP (Details) - USD ($) $ in Millions		3 Months Ended
	Feb. 04, 2020	Mar. 31, 2020	Mar. 31, 2019
Related Party Transaction [Line Items]
Investment in certain marketable securities		$ 140	$ 0
Agency Agreement with IEP | IEH
Related Party Transaction [Line Items]
Investment in certain marketable securities	$ 140

X

- Definition

Amount of cash outflow for purchase of marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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