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Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Mr. Icahn and affiliates
Related Party Transaction [Line Items]
Percentage fair value of investments in Funds that is attributable to Mr. Icahn	60.00%		60.00%		59.00%
Mr. Icahn and affiliates | Investment in funds
Related Party Transaction [Line Items]
Amount of transaction with related party			$ 280	$ 600
Mr. Icahn and affiliates | Investment balance in funds
Related Party Transaction [Line Items]
Related party transaction, balance	$ 5,100		5,100		$ 4,400
Consolidated VIE | Expense sharing arrangement
Related Party Transaction [Line Items]
Amount of transaction with related party	2	$ 3	2	5
767 Leasing (non-consolidated VIE)
Related Party Transaction [Line Items]
investment in related parties	10		10
767 Leasing (non-consolidated VIE) | Receipts and revenue from related party
Related Party Transaction [Line Items]
Amount of transaction with related party	10	3	18	5
ACF | Payments to and purchases from related party
Related Party Transaction [Line Items]
Amount of transaction with related party	1	2	2	4
Insight Portfolio Group LLC | Buying group operating expenses
Related Party Transaction [Line Items]
Amount of transaction with related party	1	$ 1	2	$ 1
Vehicles leased | 767 Leasing (non-consolidated VIE) | Payments to and purchases from related party
Related Party Transaction [Line Items]
Amount of transaction with related party	1		1
Investments | 767 Leasing (non-consolidated VIE) | Payments to and purchases from related party
Related Party Transaction [Line Items]
Amount of transaction with related party			36
Vehicles for lease | 767 Leasing (non-consolidated VIE) | Payments to and purchases from related party
Related Party Transaction [Line Items]
Amount of transaction with related party	$ 7		$ 7

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

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