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Related Party Transactions (Details) - USD ($) $ in Millions			12 Months Ended
	Feb. 29, 2016	Oct. 02, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Mr. Icahn and affiliates
Related Party Transaction [Line Items]
Percentage fair value of investments in Funds that is attributable to Mr. Icahn			69.00%	55.00%
Insight Portfolio Group LLC
Related Party Transaction [Line Items]
Expenses for transactions with related parties				$ 2	$ 2
ARL
Related Party Transaction [Line Items]
Equity issued to acquire additional interest in consolidated subsidiary (number of units)	685,367
Percentage of equity ownership in subsidiary		75.00%	100.00%
Investment in funds | Mr. Icahn and affiliates
Related Party Transaction [Line Items]
Amount of transaction with related party			$ 505	276	500
Redemption from funds | Mr. Icahn and affiliates
Related Party Transaction [Line Items]
Amount of transaction with related party			7	36
Investment balance in funds | Mr. Icahn and affiliates
Related Party Transaction [Line Items]
Related party transaction, balance			3,700	4,100
Expense sharing arrangement | Consolidated VIE
Related Party Transaction [Line Items]
Amount of transaction with related party			34	235	155
Railcar component purchases | ACF
Related Party Transaction [Line Items]
Expenses for transactions with related parties			7	18	5
Railcar component sales | ACF
Related Party Transaction [Line Items]
Revenues from transactions with related parties			1	10	19
Railcar repair services and support | ACF
Related Party Transaction [Line Items]
Revenues from transactions with related parties			1	1
Purchase of railcars | ACF
Related Party Transaction [Line Items]
Expenses for transactions with related parties			14	59
Buying group operating expenses | Insight Portfolio Group LLC
Related Party Transaction [Line Items]
Expenses for transactions with related parties			2
Railcar purchase agreement | Purchase of railcars | ACF
Related Party Transaction [Line Items]
Expenses for transactions with related parties			$ 0	$ 9	$ 127

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 850
-SubTopic 10
-Section 50
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