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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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