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Related Party Transactions (Details) (USD $) | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended |  |  | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 0 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Sep. 30, 2012 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Sep. 30, 2013 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Sep. 30, 2012 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Sep. 30, 2013 Investment Funds [Member] Principal Owners and Affiliates [Member] | Sep. 30, 2013 Investment Funds [Member] Principal Owners and Affiliates [Member] Investment in Funds [Member] | Dec. 31, 2012 Investment Funds [Member] Principal Owners and Affiliates [Member] Investment in Funds [Member] | Sep. 30, 2013 ARI [Member] | Sep. 30, 2013 ARI [Member] ACF [Member] Railcar Sales [Member] | Sep. 30, 2013 ARI [Member] ACF [Member] Railcar Sales [Member] | Sep. 30, 2012 ARI [Member] ARL [Member] Railcar Sales [Member] | Sep. 30, 2012 ARI [Member] ARL [Member] Railcar Sales [Member] | Sep. 30, 2013 ARI [Member] ARL [Member] Railcar services [Member] | Sep. 30, 2012 ARI [Member] ARL [Member] Railcar services [Member] | Sep. 30, 2013 ARI [Member] ARL [Member] Railcar services [Member] | Sep. 30, 2012 ARI [Member] ARL [Member] Railcar services [Member] | Sep. 30, 2013 AEP Leasing [Member] ACF [Member] | Sep. 30, 2013 AEP Leasing [Member] ACF [Member] Railcar Sales [Member] | Sep. 30, 2013 AEP Leasing [Member] ACF [Member] Railcar Sales [Member] | Sep. 30, 2013 AEP Leasing [Member] ACF [Member] Purchase of railcars [Member] | Oct. 02, 2013 Railcar Segment [Member] New ARL [Member]
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in funds |  |  |  |  |  |  | $ 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash investment segment contribution | 185,000,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party transaction, balance |  |  |  |  |  |  |  | 4,500,000,000 | 3,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses charged by related party |  |  | 40,000,000 | 6,000,000 | 79,000,000 | 17,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction, Other Revenues from Transactions with Related Party |  |  |  |  |  |  |  |  |  |  | 3,000,000 | 7,000,000 | 34,000,000 | 45,000,000 | 4,000,000 | 6,000,000 | 13,000,000 | 17,000,000 |  |  |  |  |
Unrecorded unconditional purchase obligation, Minimum quantity required |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,050 |
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000,000 | 25,000,000 |  |
Unrecorded Unconditional Purchase Obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 |
Option to purchase additinal railcars, number of cars |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 |  |  |  |
Option to purchase additional railcars |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 70,000,000 |  |  |  |
Term of service agreement (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |
Renewal period of service agreement (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |
Written notice requirment period to terminate services agreement (in days) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60 days |  |  |  |  |  |
Percentage of equity ownership in subsidiary |  |  |  |  |  |  |  |  |  | 55.60% |  |  |  |  |  |  |  |  |  |  |  |  | 75.00%

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