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Related Party Transactions (Details) (USD $) | 3 Months Ended | 6 Months Ended | 3 Months Ended |  |  | 3 Months Ended | 6 Months Ended |  |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2013 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Jun. 30, 2012 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Jun. 30, 2013 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Jun. 30, 2012 Icahn Capital [Member] Investment Funds [Member] Expense sharing agreement [Member] | Jun. 30, 2013 Investment Funds [Member] Principal Owners and Affiliates [Member] | Jun. 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] | Jun. 30, 2013 ARI [Member] ACF [Member] Railcar Sales [Member] | Jun. 30, 2013 ARI [Member] ACF [Member] Railcar Sales [Member] | Jun. 30, 2013 ARI [Member] ARL [Member] | Dec. 31, 2012 ARI [Member] ARL [Member] | Jun. 30, 2012 ARI [Member] ARL [Member] Railcar Sales [Member] | Jun. 30, 2012 ARI [Member] ARL [Member] Railcar Sales [Member] | Jun. 30, 2013 ARI [Member] ARL [Member] Railcar services [Member] | Jun. 30, 2012 ARI [Member] ARL [Member] Railcar services [Member] | Jun. 30, 2013 ARI [Member] ARL [Member] Railcar services [Member] | Jun. 30, 2012 ARI [Member] ARL [Member] Railcar services [Member] | Jun. 30, 2013 AEP Leasing [Member] ACF [Member] | Jun. 30, 2013 AEP Leasing [Member] ACF [Member] Railcar Sales [Member] | Jun. 30, 2013 AEP Leasing [Member] ACF [Member] Railcar Sales [Member] | Jun. 30, 2013 AEP Leasing [Member] ACF [Member] Purchase of railcars [Member]
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in funds |  |  |  |  | $ 45,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party transaction, balance |  |  |  |  |  | 3,800,000,000 | 3,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses charged by related party | 13,000,000 | 7,000,000 | 40,000,000 | 11,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction, Other Revenues from Transactions with Related Party |  |  |  |  |  |  |  | 3,000,000 | 3,000,000 |  |  | 11,000,000 | 11,000,000 | 5,000,000 | 6,000,000 | 9,000,000 | 11,000,000 |  |  |  |
Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,050
Related Party Transaction, Expenses from Transactions with Related Party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 | 5,000,000 |
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 |  |  |  |  |
Accounts receivable due from related parties |  |  |  |  |  |  |  |  |  | $ 4,000,000 | $ 2,000,000 |  |  |  |  |  |  |  |  |  |

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