Related Party Transactions (Details) (USD $)	3 Months Ended							3 Months Ended
	Mar. 31, 2013 ARL [Member]	Mar. 31, 2013 Icahn Capital [Member] Investment Funds [Member] Expense Sharing Agreement [Member]	Mar. 31, 2012 Icahn Capital [Member] Investment Funds [Member] Expense Sharing Agreement [Member]	Mar. 31, 2013 Investment Funds [Member] Principal Owners and Affiliates [Member]	Dec. 31, 2012 Investment Funds [Member] Principal Owners and Affiliates [Member]	Mar. 31, 2013 ARI [Member] ARL [Member]	Dec. 31, 2012 ARI [Member] ARL [Member]	Mar. 31, 2013 ARI [Member] ARL [Member] Railcar Services [Member]	Mar. 31, 2012 ARI [Member] ARL [Member] Railcar Services [Member]
Related Party Transaction [Line Items]
Related party investment in Funds				$ 3,900,000,000	$ 3,500,000,000
Expenses charged by related party		27,000,000	3,000,000
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
Term of railcar management agreement (in years)	5 years
Revenue from related party								5,000,000	5,000,000
Accounts receivable due from related parties						$ 3,000,000	$ 2,000,000